[FEAT] Add Kofi btn

- Add layer support
- Add background color picker
- Improved UI

Caddyfile

@@ -1,16 +1,28 @@
 http://spritesheetgenerator.online:1337 {
     root * ./dist
-    encode gzip
+    encode zstd gzip
+
+    # Aggressive caching for static assets
+    @static path *.js *.css *.png *.jpg *.jpeg *.gif *.webp *.svg *.woff *.woff2 *.ico
+    header @static Cache-Control "public, max-age=31536000, immutable"
+
+    # Short cache for HTML (for SPA updates)
+    @html path *.html /
+    header @html Cache-Control "no-cache, must-revalidate"
+
+    # Default cache for everything else
+    header ?Cache-Control "max-age=1800"
 
     try_files {path} /index.html
-
+    file_server {
-    file_server
+        precompressed zstd gzip
+    }
 
     log {
         output file /var/log/caddy/spritesheetgenerator.online.log
     }
+}
 
-    header {
+:1338 {
-        ?Cache-Control "max-age=1800"
+    redir https://spritesheetgenerator.online{uri} permanent
-    }
 }

LICENSE.md

@@ -0,0 +1,636 @@
+# GNU GENERAL PUBLIC LICENSE
+Version 3, 29 June 2007
+
+Copyright (C) 2007 [Free Software Foundation, Inc.](http://fsf.org/)
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+EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE
+QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
+DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
+CORRECTION.
+
+### 16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
+COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS
+PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
+INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
+THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
+INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
+PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY
+HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+### 17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided above cannot
+be given local legal effect according to their terms, reviewing courts shall
+apply local law that most closely approximates an absolute waiver of all civil
+liability in connection with the Program, unless a warranty or assumption of
+liability accompanies a copy of the Program in return for a fee.
+
+## END OF TERMS AND CONDITIONS ###
+
+### How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible
+use to the public, the best way to achieve this is to make it free software
+which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest to attach
+them to the start of each source file to most effectively state the exclusion
+of warranty; and each file should have at least the *copyright* line and a
+pointer to where the full notice is found.
+
+	<one line to give the program's name and a brief idea of what it does.>
+	Copyright (C) <year>  <name of author>
+	
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+	
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+	
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice like
+this when it starts in an interactive mode:
+
+	<program>  Copyright (C) <year>  <name of author>
+	This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+	This is free software, and you are welcome to redistribute it
+	under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w` and `show c` should show the appropriate
+parts of the General Public License. Of course, your program's commands might
+be different; for a GUI interface, you would use an *about box*.
+
+You should also get your employer (if you work as a programmer) or school, if
+any, to sign a *copyright disclaimer* for the program, if necessary. For more
+information on this, and how to apply and follow the GNU GPL, see
+[http://www.gnu.org/licenses/](http://www.gnu.org/licenses/).
+
+The GNU General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may consider
+it more useful to permit linking proprietary applications with the library. If
+this is what you want to do, use the GNU Lesser General Public License instead
+of this License. But first, please read
+[http://www.gnu.org/philosophy/why-not-lgpl.html](http://www.gnu.org/philosophy/why-not-lgpl.html).

index.html

@@ -2,36 +2,45 @@
 <html lang="en">
   <head>
     <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+    <!-- Preconnect to external domains for performance -->
+    <link rel="preconnect" href="https://cdnjs.cloudflare.com" crossorigin>
+    <link rel="dns-prefetch" href="https://cdnjs.cloudflare.com">
+    <link rel="preconnect" href="https://a.adhd.sh" crossorigin>
+    <link rel="dns-prefetch" href="https://a.adhd.sh">
+    <link rel="preconnect" href="https://pagead2.googlesyndication.com" crossorigin>
+    <link rel="dns-prefetch" href="https://pagead2.googlesyndication.com">
 
     <link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <link rel="shortcut icon" href="/favicon.ico" />
     <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
-    <meta name="apple-mobile-web-app-title" content="MyWebSite" />
+    <meta name="apple-mobile-web-app-title" content="Spritesheet Generator" />
     <link rel="manifest" href="/site.webmanifest" />
 
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
     <!-- Primary Meta Tags -->
-    <title>Spritesheet Generator - Create Game Spritesheets Online</title>
+    <title>Spritesheet generator - Create Game Spritesheets Online</title>
-    <meta name="title" content="Spritesheet Generator - Create Game Spritesheets Online">
+    <meta name="title" content="Spritesheet generator - Create Game Spritesheets Online">
     <meta name="description" content="Free online tool to create spritesheets for game development. Upload sprites, arrange them, and export as a spritesheet with animation preview.">
-    <meta name="keywords" content="spritesheet generator, sprite sheet maker, game development, pixel art, sprite animation, game assets, 2D game tools">
+    <meta name="keywords" content="Spritesheet generator, sprite sheet maker, game development, pixel art, sprite animation, game assets, 2D game tools">
-    <meta name="author" content="nu11ed">
+    <meta name="author" content="streetshadow">
     <meta name="robots" content="index, follow">
+    <link rel="canonical" href="https://spritesheetgenerator.online/">
 
     <!-- Open Graph / Facebook -->
     <meta property="og:type" content="website">
     <meta property="og:url" content="https://spritesheetgenerator.online/">
-    <meta property="og:title" content="Spritesheet Generator - Create Game Spritesheets Online">
+    <meta property="og:title" content="Spritesheet generator - Create Game Spritesheets Online">
     <meta property="og:description" content="Free online tool to create spritesheets for game development. Upload sprites, arrange them, and export as a spritesheet with animation preview.">
     <meta property="og:image" content="/og-image.png">
 
     <!-- Twitter -->
     <meta property="twitter:card" content="summary_large_image">
     <meta property="twitter:url" content="https://spritesheetgenerator.online/">
-    <meta property="twitter:title" content="Spritesheet Generator - Create Game Spritesheets Online">
+    <meta property="twitter:title" content="Spritesheet generator - Create Game Spritesheets Online">
     <meta property="twitter:description" content="Free online tool to create spritesheets for game development. Upload sprites, arrange them, and export as a spritesheet with animation preview.">
     <meta property="twitter:image" content="/og-image.png">
 
@@ -39,8 +48,6 @@
     <meta name="theme-color" content="#0096ff" media="(prefers-color-scheme: light)">
     <meta name="theme-color" content="#111827" media="(prefers-color-scheme: dark)">
 
-    <title>Spritesheet generator</title>
-
     <script
       src="https://a.adhd.sh/api/script.js"
       data-site-id="7"
@@ -48,9 +55,6 @@
       data-session-replay="true"
       defer
     ></script>
-
-    <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-3715260871588949"
-            crossorigin="anonymous"></script>
   </head>
   <body>
     <div id="app"></div>

package.json

@@ -13,18 +13,23 @@
   },
   "dependencies": {
     "@tailwindcss/vite": "^4.1.1",
+    "@vueuse/head": "^2.0.0",
+    "buffer": "^6.0.3",
     "gif.js": "^0.2.0",
+    "gray-matter": "^4.0.3",
     "jszip": "^3.10.1",
     "marked": "^15.0.7",
     "pinia": "^3.0.1",
     "pocketbase": "^0.26.2",
-    "vue": "^3.5.13"
+    "vue": "^3.5.13",
+    "vue-router": "^4.6.3"
   },
   "devDependencies": {
     "@ianvs/prettier-plugin-sort-imports": "^4.4.1",
+    "@tailwindcss/typography": "^0.5.19",
     "@tsconfig/node22": "^22.0.1",
     "@types/gif.js": "^0.2.5",
-    "@types/node": "^22.13.14",
+    "@types/node": "^22.19.1",
     "@vitejs/plugin-vue": "^5.2.3",
     "@vue/tsconfig": "^0.7.0",
     "autoprefixer": "^10.4.21",

public/CHANGELOG.md

@@ -1,7 +1,18 @@
 All notable changes to this project will be documented in this file.
 
+## [1.8.0] - 2025-11-23
+- Fix context menu location
+- You can now reposition all sprites in current frame
+
+## [1.7.0] - 2025-11-22
+- Add layer support
+- Add background color picker
+- Improved UI
+
 ## [1.6.0] - 2025-11-18
 - Improved animation preview modal
+- Add toggle for negative spacing in cells
+- Show cell size
 
 ## [1.5.0] - 2025-11-17
 - Show offset values in sprite cells and in preview modal
@@ -32,30 +43,30 @@ All notable changes to this project will be documented in this file.
 ## [1.7.0] - 2025-05-02
 
 ### Removed
-- 🪟 Checkerboard pattern inside sprite cells as it could conflict with the sprite. (Thanks Rivers)
+- Checkerboard pattern inside sprite cells as it could conflict with the sprite. (Thanks Rivers)
 
 ## [1.6.0] - 2025-04-30
 
 ### Added
-- 🎨 Dark mode support
+- Dark mode support
-- ⭐ Preview other sprites inside cells from overview
+- Preview other sprites inside cells from overview
 
 ## [1.5.0] - 2025-04-30
 
 ### Added
-- 📏 Offset indicators for better sprite alignment
+- Offset indicators for better sprite alignment
 - Set base offset for offset indicators
 
 ## [1.4.0] - 2025-04-06
 
 ### Added
-- 🎥 Download as GIF functionality
+- Download as GIF functionality
-- 🗂 Download as ZIP functionality
+- Download as ZIP functionality
 
 ## [1.3.0] - 2025-04-06
 
 ### Fixed
-- 📄 When importing a spritesheet, the tool will now remove transparent from the edges of each sprite so you can move them inside their cells.
+- When importing a spritesheet, the tool will now remove transparent from the edges of each sprite so you can move them inside their cells.
 
 ## [1.2.0] - 2025-04-06
 
@@ -65,22 +76,22 @@ All notable changes to this project will be documented in this file.
 ## [1.1.0] - 2025-04-06
 
 ### Added
-- 📝 Help modal with instructions and tips
+- Help modal with instructions and tips
-- 🎨 Pixel perfect mode for better sprite alignment
+- Pixel perfect mode for better sprite alignment
 
 ## [1.0.0] - 2025-04-06
 
 ### Added
 - 🎉 Initial release
-- ✨ Basic spritesheet generation functionality
+- Basic spritesheet generation functionality
 - Drag and drop image upload
 - Grid-based sprite arrangement
 - Custom grid size configuration
-- 🎮 Animation preview functionality
+- Animation preview functionality
 - Real-time animation preview
 - Adjustable animation speed
 - Frame-by-frame navigation
-- 💾 JSON import/export support
+- JSON import/export support
 - Save sprite arrangements
 - Load previous projects
 - Export configuration files

public/ads.txt

@@ -0,0 +1 @@
+google.com, pub-3715260871588949, DIRECT, f08c47fec0942fa0

public/robots.txt

@@ -0,0 +1,3 @@
+User-agent: *
+Allow: /
+Sitemap: https://spritesheetgenerator.online/sitemap.xml

public/sitemap.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset
+      xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
+            http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
+
+<url>
+  <loc>https://spritesheetgenerator.online/</loc>
+  <lastmod>2025-11-26T15:50:00+00:00</lastmod>
+</url>
+<url>
+  <loc>https://spritesheetgenerator.online/about</loc>
+  <lastmod>2025-11-26T15:50:00+00:00</lastmod>
+</url>
+<url>
+  <loc>https://spritesheetgenerator.online/contact</loc>
+  <lastmod>2025-11-26T15:50:00+00:00</lastmod>
+</url>
+<url>
+  <loc>https://spritesheetgenerator.online/privacy-policy</loc>
+  <lastmod>2025-11-26T15:50:00+00:00</lastmod>
+</url>
+<url>
+  <loc>https://spritesheetgenerator.online/blog</loc>
+  <lastmod>2025-11-26T15:50:00+00:00</lastmod>
+</url>
+<url>
+  <loc>https://spritesheetgenerator.online/blog/why-pixel-art</loc>
+  <lastmod>2025-11-26T15:50:00+00:00</lastmod>
+</url>
+<url>
+  <loc>https://spritesheetgenerator.online/blog/welcome</loc>
+  <lastmod>2025-11-26T15:50:00+00:00</lastmod>
+</url>
+<url>
+  <loc>https://spritesheetgenerator.online/faq</loc>
+  <lastmod>2025-11-26T19:37:00+00:00</lastmod>
+</url>
+
+
+</urlset>

src/App.vue

@@ -1,132 +1,67 @@
 <template>
-  <div class="min-h-screen p-3 sm:p-6 bg-gradient-to-br from-gray-50 to-gray-100 dark:from-gray-900 dark:to-gray-800 transition-colors duration-300">
+  <div class="min-h-screen flex flex-col p-4 sm:p-8 bg-slate-50 dark:bg-gray-950 transition-colors duration-300" :class="{ 'lg:h-screen': layers.some(l => l.sprites.length) && $route.name === 'home' }">
-    <div class="max-w-7xl mx-auto">
+    <!-- Decorative gradient blur in top-right corner -->
-      <div class="flex flex-col sm:flex-row justify-between items-center mb-4 sm:mb-8 gap-2">
+    <div class="fixed top-0 right-0 w-[600px] h-[600px] bg-gradient-to-bl from-blue-400/40 via-purple-400/30 to-transparent dark:from-blue-400/30 dark:via-purple-400/20 blur-3xl pointer-events-none -translate-y-32 translate-x-32"></div>
-        <h1 class="text-2xl sm:text-4xl font-bold text-gray-900 dark:text-white tracking-tight text-center sm:text-left">Spritesheet generator</h1>
+    <div class="flex flex-col flex-1" :class="{ 'lg:overflow-hidden': layers.some(l => l.sprites.length) && $route.name === 'home' }">
+      <header class="mb-6 sm:mb-8">
+        <div class="flex flex-col sm:flex-row justify-between items-start sm:items-center gap-6 mb-6">
+          <div class="text-center sm:text-left w-full sm:w-auto">
+            <router-link to="/" class="block group" title="Spritesheet Generator - Create professional spritesheets" aria-label="Go to homepage">
+              <span class="inline-block text-3xl sm:text-4xl lg:text-5xl font-extrabold text-transparent bg-clip-text bg-gradient-to-r from-gray-900 to-gray-700 dark:from-white dark:to-gray-300 tracking-tight mb-2 sm:mb-3 group-hover:opacity-80 transition-opacity">Spritesheet generator</span>
+            </router-link>
+            <p class="text-sm sm:text-base text-gray-600 dark:text-gray-400 font-medium">Create professional spritesheets for your game development projects</p>
+          </div>
+          <div class="flex flex-col items-center sm:items-end gap-3 w-full sm:w-auto">
+            <nav class="flex flex-wrap items-center justify-center sm:justify-end gap-2 sm:gap-3">
+              <a href="https://gitea.adhd.sh/root/spritesheet-generator" target="_blank" rel="noopener noreferrer" class="btn btn-secondary hover:shadow-md" data-rybbit-event="source-link" title="View source code on Gitea" aria-label="View source code repository">
+                <i class="fab fa-github"></i>
+                <span class="font-medium">Source</span>
+              </a>
+              <a href="https://discord.gg/JTev3nzeDa" target="_blank" rel="noopener noreferrer" class="btn btn-secondary hover:shadow-md" data-rybbit-event="discord-link" title="Join our Discord community" aria-label="Join Discord server">
+                <i class="fab fa-discord"></i>
+                <span class="font-medium">Discord</span>
+              </a>
+              <a href="#" @click.prevent="openHelpModal" class="btn btn-secondary hover:shadow-md" data-rybbit-event="help-link" title="Get help and documentation" aria-label="Open help modal">
+                <i class="fas fa-question-circle"></i>
+                <span class="font-medium">Help</span>
+              </a>
+              <a href="#" @click.prevent="openFeedbackModal" class="btn btn-secondary hover:shadow-md" data-rybbit-event="feedback-link" title="Share your feedback with us" aria-label="Open feedback modal">
+                <i class="fas fa-comment-dots"></i>
+                <span class="font-medium">Feedback</span>
+              </a>
               <dark-mode-toggle />
+            </nav>
+            <div class="flex flex-wrap items-center justify-center sm:justify-end gap-3 sm:gap-4 text-xs sm:text-sm font-medium text-gray-600 dark:text-gray-400">
+              <router-link to="/" class="hover:text-gray-900 dark:hover:text-white transition-colors whitespace-nowrap" title="Spritesheet Generator Home" aria-label="Navigate to home page">Home</router-link>
+              <router-link to="/blog" class="hover:text-gray-900 dark:hover:text-white transition-colors whitespace-nowrap" title="Read our blog posts" aria-label="Navigate to blog">Blog</router-link>
+              <router-link to="/about" class="hover:text-gray-900 dark:hover:text-white transition-colors whitespace-nowrap" title="Learn more about us" aria-label="Navigate to about page">About Us</router-link>
+              <router-link to="/contact" class="hover:text-gray-900 dark:hover:text-white transition-colors whitespace-nowrap" title="Get in touch with us" aria-label="Navigate to contact page">Contact</router-link>
+              <router-link to="/faq" class="hover:text-gray-900 dark:hover:text-white transition-colors whitespace-nowrap" title="Frequently Asked Questions" aria-label="Navigate to FAQ page">FAQ</router-link>
+              <router-link to="/privacy-policy" class="hover:text-gray-900 dark:hover:text-white transition-colors whitespace-nowrap" title="Read our privacy policy" aria-label="Navigate to privacy policy">Privacy Policy</router-link>
+              <a href="/sitemap.xml" target="_blank" rel="noopener noreferrer" class="hover:text-gray-900 dark:hover:text-white transition-colors whitespace-nowrap" title="View XML sitemap" aria-label="View sitemap">Sitemap</a>
             </div>
-      <div class="flex flex-wrap justify-center gap-4 mb-4 sm:mb-8">
-        <a href="https://gitea.adhd.sh/root/spritesheet-generator" target="_blank" class="text-blue-500 hover:text-blue-600 dark:text-blue-400 dark:hover:text-blue-300 transition-colors" data-rybbit-event="source-link"> <i class="fab fa-github"></i> Source </a>
-        <a href="https://discord.gg/JTev3nzeDa" target="_blank" class="text-blue-500 hover:text-blue-600 dark:text-blue-400 dark:hover:text-blue-300 transition-colors" data-rybbit-event="discord-link"> <i class="fab fa-discord"></i> Discord </a>
-        <a href="#" @click.prevent="openHelpModal" class="text-blue-500 hover:text-blue-600 dark:text-blue-400 dark:hover:text-blue-300 transition-colors" data-rybbit-event="help-link"> <i class="fas fa-question-circle"></i> Help </a>
-        <a href="#" @click.prevent="openFeedbackModal" class="text-blue-500 hover:text-blue-600 dark:text-blue-400 dark:hover:text-blue-300 transition-colors" data-rybbit-event="feedback-link"> <i class="fas fa-comment-dots"></i> Feedback </a>
           </div>
+        </div>
+      </header>
 
-      <div class="bg-white dark:bg-gray-800 rounded-2xl shadow-soft dark:shadow-gray-900/30 p-4 sm:p-8 transition-colors duration-300">
+      <Breadcrumbs />
-        <div class="flex flex-col sm:flex-row justify-between items-center mb-4 sm:mb-6 gap-3">
-          <h2 class="text-xl font-semibold text-gray-800 dark:text-gray-100">Upload sprites</h2>
-          <button
-            @click="openJSONImportDialog"
-            class="w-full sm:w-auto px-4 py-2 bg-indigo-500 hover:bg-indigo-600 dark:bg-indigo-600 dark:hover:bg-indigo-700 text-white font-medium rounded-lg transition-colors flex items-center justify-center sm:justify-start space-x-2"
-            data-rybbit-event="import-json"
-          >
-            <i class="fas fa-file-import"></i>
-            <span>Import JSON</span>
-          </button>
-        </div>
-        <file-uploader @upload-sprites="handleSpritesUpload" />
-        <input ref="jsonFileInput" type="file" accept=".json,application/json" class="hidden" @change="handleJSONFileChange" />
-        <div v-if="!sprites.length" class="mt-8">
-          <div class="mt-2 leading-relaxed space-y-2">
-            <p>Create spritesheets for your game development and animation projects with our completely free, open-source spritesheet generator.</p>
-            <p>This powerful online tool lets you upload individual sprite images and automatically arrange them into optimized sprite sheets with customizable layouts - perfect for indie developers, animators, and studios of any size.</p>
-            <p class="font-bold text-2xl pb-3 pt-2">How it works:</p>
-            <video controls playsinline class="w-full h-full object-contain rounded-lg shadow-md" title="Spritesheet generator tutorial" aria-label="Spritesheet generator tutorial">
-              <source src="@/assets/tut2.mp4" type="video/mp4" />
-            </video>
-          </div>
-        </div>
 
-        <div v-if="sprites.length > 0" class="mt-8">
+      <router-view />
-          <div class="flex flex-wrap items-center justify-center sm:justify-start gap-3 sm:gap-6 mb-6 sm:mb-8">
-            <div class="flex items-center space-x-1">
-              <label for="columns" class="text-gray-700 dark:text-gray-200 font-medium">Columns:</label>
-              <input
-                id="columns"
-                type="number"
-                v-model.number="columns"
-                min="1"
-                max="10"
-                class="w-20 px-3 py-2 border border-gray-200 dark:border-gray-600 dark:bg-gray-700 dark:text-gray-100 rounded-lg focus:ring-2 focus:ring-blue-500 dark:focus:ring-blue-400 focus:border-transparent outline-none transition-all text-base"
-              />
     </div>
 
-            <!-- Add mass position buttons -->
-            <div class="flex flex-wrap items-center justify-center gap-2">
-              <button @click="alignSprites('left')" class="p-3 sm:p-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-700 dark:hover:bg-gray-600 text-gray-700 dark:text-gray-100 rounded-lg transition-colors" title="Align Left" data-rybbit-event="align-left">
-                <i class="fas fa-arrow-left"></i>
-              </button>
-              <button @click="alignSprites('center')" class="p-3 sm:p-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-700 dark:hover:bg-gray-600 text-gray-700 dark:text-gray-100 rounded-lg transition-colors" title="Align Center" data-rybbit-event="align-center">
-                <i class="fas fa-arrows-left-right"></i>
-              </button>
-              <button @click="alignSprites('right')" class="p-3 sm:p-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-700 dark:hover:bg-gray-600 text-gray-700 dark:text-gray-100 rounded-lg transition-colors" title="Align Right" data-rybbit-event="align-right">
-                <i class="fas fa-arrow-right"></i>
-              </button>
-              <button @click="alignSprites('top')" class="p-3 sm:p-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-700 dark:hover:bg-gray-600 text-gray-700 dark:text-gray-100 rounded-lg transition-colors" title="Align Top" data-rybbit-event="align-top">
-                <i class="fas fa-arrow-up"></i>
-              </button>
-              <button @click="alignSprites('middle')" class="p-3 sm:p-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-700 dark:hover:bg-gray-600 text-gray-700 dark:text-gray-100 rounded-lg transition-colors" title="Align Middle" data-rybbit-event="align-middle">
-                <i class="fas fa-arrows-up-down"></i>
-              </button>
-              <button @click="alignSprites('bottom')" class="p-3 sm:p-2 bg-gray-100 hover:bg-gray-200 dark:bg-gray-700 dark:hover:bg-gray-600 text-gray-700 dark:text-gray-100 rounded-lg transition-colors" title="Align Bottom" data-rybbit-event="align-bottom">
-                <i class="fas fa-arrow-down"></i>
-              </button>
-            </div>
-
-            <button @click="downloadSpritesheet" class="w-full sm:w-auto px-6 py-3 sm:py-2.5 bg-blue-500 hover:bg-blue-600 dark:bg-blue-600 dark:hover:bg-blue-700 text-white font-medium rounded-lg transition-colors flex items-center justify-center space-x-2" data-rybbit-event="download-spritesheet">
-              <i class="fas fa-download"></i>
-              <span>Download spritesheet</span>
-            </button>
-
-            <button
-              @click="exportSpritesheetJSON"
-              class="w-full sm:w-auto px-6 py-3 sm:py-2.5 bg-purple-500 hover:bg-purple-600 dark:bg-purple-600 dark:hover:bg-purple-700 text-white font-medium rounded-lg transition-colors flex items-center justify-center space-x-2"
-              data-rybbit-event="export-json"
-            >
-              <i class="fas fa-file-code"></i>
-              <span>Export as JSON</span>
-            </button>
-
-            <button @click="openGifFpsModal" class="w-full sm:w-auto px-6 py-3 sm:py-2.5 bg-amber-500 hover:bg-amber-600 dark:bg-amber-600 dark:hover:bg-amber-700 text-white font-medium rounded-lg transition-colors flex items-center justify-center space-x-2" data-rybbit-event="download-gif">
-              <i class="fas fa-film"></i>
-              <span>Download as GIF</span>
-            </button>
-
-            <button @click="downloadAsZip" class="w-full sm:w-auto px-6 py-3 sm:py-2.5 bg-teal-500 hover:bg-teal-600 dark:bg-teal-600 dark:hover:bg-teal-700 text-white font-medium rounded-lg transition-colors flex items-center justify-center space-x-2" data-rybbit-event="download-zip">
-              <i class="fas fa-file-archive"></i>
-              <span>Download as ZIP</span>
-            </button>
-
-            <button @click="openPreviewModal" class="w-full sm:w-auto px-6 py-3 sm:py-2.5 bg-green-500 hover:bg-green-600 dark:bg-green-600 dark:hover:bg-green-700 text-white font-medium rounded-lg transition-colors flex items-center justify-center space-x-2" data-rybbit-event="preview-animation">
-              <i class="fas fa-play"></i>
-              <span>Preview animation</span>
-            </button>
-          </div>
-
-          <sprite-canvas :sprites="sprites" :columns="columns" @update-sprite="updateSpritePosition" @update-sprite-cell="updateSpriteCell" @remove-sprite="removeSprite" @replace-sprite="replaceSprite" @add-sprite="addSprite" @add-sprite-with-resize="addSpriteWithResize" />
-        </div>
-      </div>
-    </div>
-
-    <Modal :is-open="isPreviewModalOpen" @close="closePreviewModal" title="Animation preview">
-      <sprite-preview :sprites="sprites" :columns="columns" @update-sprite="updateSpritePosition" />
-    </Modal>
-
     <HelpModal :is-open="isHelpModalOpen" @close="closeHelpModal" />
     <FeedbackModal :is-open="isFeedbackModalOpen" @close="closeFeedbackModal" />
-    <SpritesheetSplitter :is-open="isSpritesheetSplitterOpen" :image-url="spritesheetImageUrl" :image-file="spritesheetImageFile" @close="closeSpritesheetSplitter" @split="handleSplitSpritesheet" />
-    <GifFpsModal :is-open="isGifFpsModalOpen" @close="closeGifFpsModal" @confirm="downloadAsGif" :default-fps="10" />
 
     <!-- One-time feedback popup -->
-    <div v-if="showFeedbackPopup" class="fixed inset-0 backdrop-blur-sm flex items-center justify-center z-50">
+    <div v-if="showFeedbackPopup" class="fixed inset-0 z-50 flex items-center justify-center backdrop-blur-sm">
-      <div class="bg-white dark:bg-gray-800 rounded-xl p-6 max-w-md mx-4 shadow-xl border border-gray-600">
+      <div class="max-w-md p-6 mx-4 bg-white dark:bg-gray-800 border border-gray-600 rounded-xl shadow-xl">
         <div class="text-center">
-          <div class="text-4xl mb-4">💬</div>
+          <div class="mb-4 text-4xl">💬</div>
-          <h3 class="text-lg font-semibold text-gray-900 dark:text-white mb-3">Help us improve!</h3>
+          <h3 class="mb-3 text-lg font-semibold text-gray-900 dark:text-white">Help us improve!</h3>
-          <p class="text-gray-600 dark:text-gray-300 mb-6">We'd love to hear your thoughts about the spritesheet generator. Would you like to share your feedback?</p>
+          <p class="mb-6 text-gray-600 dark:text-gray-300">We'd love to hear your thoughts about the Spritesheet generator. Would you like to share your feedback?</p>
-          <div class="flex gap-3 justify-center">
+          <div class="flex justify-center gap-3">
-            <button @click="handleFeedbackPopupResponse(false)" class="px-4 py-2 text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200 transition-colors">Maybe later</button>
+            <button @click="handleFeedbackPopupResponse(false)" class="px-4 py-2 text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200 transition-colors cursor-pointer">Maybe later</button>
-            <button @click="handleFeedbackPopupResponse(true)" class="px-6 py-2 bg-blue-500 hover:bg-blue-600 text-white font-medium rounded-lg transition-colors">Share feedback</button>
+            <button @click="handleFeedbackPopupResponse(true)" class="px-6 py-2 font-medium text-white bg-gray-700 hover:bg-gray-800 rounded-lg transition-colors cursor-pointer">Share feedback</button>
           </div>
         </div>
       </div>
@@ -135,190 +70,20 @@
 </template>
 
 <script setup lang="ts">
-  import { ref, watch, onMounted, onUnmounted } from 'vue';
+  import { ref, onMounted } from 'vue';
-  import FileUploader from './components/FileUploader.vue';
+  import { RouterView, RouterLink } from 'vue-router';
-  import SpriteCanvas from './components/SpriteCanvas.vue';
-  import Modal from './components/utilities/Modal.vue';
-  import SpritePreview from './components/SpritePreview.vue';
   import HelpModal from './components/HelpModal.vue';
   import FeedbackModal from './components/FeedbackModal.vue';
-  import SpritesheetSplitter from './components/SpritesheetSplitter.vue';
-  import GifFpsModal from './components/GifFpsModal.vue';
   import DarkModeToggle from './components/utilities/DarkModeToggle.vue';
-  import GIF from 'gif.js';
+  import Breadcrumbs from './components/Breadcrumbs.vue';
-  import gifWorkerUrl from 'gif.js/dist/gif.worker.js?url';
+  import { useLayers } from './composables/useLayers';
-  import JSZip from 'jszip';
 
-  interface Sprite {
+  const { layers, hasSprites } = useLayers();
-    id: string;
-    file: File;
-    img: HTMLImageElement;
-    url: string;
-    width: number;
-    height: number;
-    x: number;
-    y: number;
-  }
 
-  interface SpriteFile {
-    file: File;
-    x: number;
-    y: number;
-    width: number;
-    height: number;
-  }
-
-  const sprites = ref<Sprite[]>([]);
-  const columns = ref(4);
-  // Clamp and coerce columns to a safe range [1..10]
-  watch(columns, val => {
-    const num = typeof val === 'number' ? val : parseInt(String(val));
-    const safe = Number.isFinite(num) && num >= 1 ? Math.min(num, 10) : 1;
-    if (safe !== columns.value) columns.value = safe;
-  });
-  const isPreviewModalOpen = ref(false);
   const isHelpModalOpen = ref(false);
   const isFeedbackModalOpen = ref(false);
-  const isSpritesheetSplitterOpen = ref(false);
-  const isGifFpsModalOpen = ref(false);
-  const jsonFileInput = ref<HTMLInputElement | null>(null);
-  const spritesheetImageUrl = ref('');
-  const spritesheetImageFile = ref<File | null>(null);
   const showFeedbackPopup = ref(false);
 
-  const handleSpritesUpload = (files: File[]) => {
-    // Check if any of the files is a JSON file
-    const jsonFile = files.find(file => file.type === 'application/json' || file.name.endsWith('.json'));
-
-    if (jsonFile) {
-      // If it's a JSON file, try to import it
-      importSpritesheetJSON(jsonFile);
-      return;
-    }
-
-    // Check if it's a single image file that might be a spritesheet
-    if (files.length === 1 && files[0].type.startsWith('image/')) {
-      const file = files[0];
-      const url = URL.createObjectURL(file);
-
-      // Load the image to check its dimensions
-      const img = new Image();
-      img.onload = () => {
-        // Ask the user if they want to split the spritesheet
-        if (confirm('This looks like it might be a spritesheet. Would you like to split it into individual sprites?')) {
-          // Open the spritesheet splitter
-          spritesheetImageUrl.value = url;
-          spritesheetImageFile.value = file;
-          isSpritesheetSplitterOpen.value = true;
-          return;
-        }
-
-        // If the user doesn't want to split or it's not large enough, process as a single sprite
-        processImageFiles([file]);
-      };
-      img.src = url;
-      return;
-    }
-
-    // Process multiple image files normally
-    processImageFiles(files);
-  };
-
-  // Extract the image processing logic to a separate function for reuse
-  const processImageFiles = (files: File[]) => {
-    Promise.all(
-      files.map(file => {
-        return new Promise<Sprite>(resolve => {
-          const url = URL.createObjectURL(file);
-          const img = new Image();
-          img.onload = () => {
-            resolve({
-              id: crypto.randomUUID(),
-              file,
-              img,
-              url,
-              width: img.width,
-              height: img.height,
-              x: 0,
-              y: 0,
-            });
-          };
-          img.src = url;
-        });
-      })
-    ).then(newSprites => {
-      sprites.value = [...sprites.value, ...newSprites];
-    });
-  };
-
-  const updateSpritePosition = (id: string, x: number, y: number) => {
-    const spriteIndex = sprites.value.findIndex(sprite => sprite.id === id);
-    if (spriteIndex !== -1) {
-      // Ensure integer positions for pixel-perfect rendering
-      sprites.value[spriteIndex].x = Math.floor(x);
-      sprites.value[spriteIndex].y = Math.floor(y);
-    }
-  };
-
-  const downloadSpritesheet = () => {
-    if (sprites.value.length === 0) {
-      alert('Please upload or import sprites before downloading the spritesheet.');
-      return;
-    }
-
-    const canvas = document.createElement('canvas');
-    const ctx = canvas.getContext('2d');
-    if (!ctx) return;
-
-    // Find max dimensions
-    let maxWidth = 0;
-    let maxHeight = 0;
-
-    sprites.value.forEach(sprite => {
-      if (sprite.width > maxWidth) maxWidth = sprite.width;
-      if (sprite.height > maxHeight) maxHeight = sprite.height;
-    });
-
-    // Set canvas size
-    const rows = Math.ceil(sprites.value.length / columns.value);
-    canvas.width = maxWidth * columns.value;
-    canvas.height = maxHeight * rows;
-
-    // Disable image smoothing for pixel-perfect rendering
-    ctx.imageSmoothingEnabled = false;
-
-    // Draw sprites with integer positions
-    sprites.value.forEach((sprite, index) => {
-      const col = index % columns.value;
-      const row = Math.floor(index / columns.value);
-
-      const cellX = Math.floor(col * maxWidth);
-      const cellY = Math.floor(row * maxHeight);
-
-      ctx.drawImage(sprite.img, Math.floor(cellX + sprite.x), Math.floor(cellY + sprite.y));
-    });
-
-    // Create download link with PNG format
-    const link = document.createElement('a');
-    link.download = 'spritesheet.png';
-    link.href = canvas.toDataURL('image/png', 1.0); // Use maximum quality
-    link.click();
-  };
-
-  // Preview modal control
-  const openPreviewModal = () => {
-    if (sprites.value.length === 0) {
-      alert('Please upload or import sprites to preview an animation.');
-      return;
-    }
-    isPreviewModalOpen.value = true;
-  };
-
-  const closePreviewModal = () => {
-    isPreviewModalOpen.value = false;
-  };
-
-  // Help modal control
   const openHelpModal = () => {
     isHelpModalOpen.value = true;
   };
@@ -327,7 +92,6 @@
     isHelpModalOpen.value = false;
   };
 
-  // Feedback modal control
   const openFeedbackModal = () => {
     isFeedbackModalOpen.value = true;
   };
@@ -336,512 +100,15 @@
     isFeedbackModalOpen.value = false;
   };
 
-  // Spritesheet splitter modal control
-  const closeSpritesheetSplitter = () => {
-    isSpritesheetSplitterOpen.value = false;
-    // Clean up the URL object to prevent memory leaks
-    if (spritesheetImageUrl.value) {
-      URL.revokeObjectURL(spritesheetImageUrl.value);
-      spritesheetImageUrl.value = '';
-    }
-    spritesheetImageFile.value = null;
-  };
-
-  // GIF FPS modal control
-  const openGifFpsModal = () => {
-    if (sprites.value.length === 0) {
-      alert('Please upload or import sprites before generating a GIF.');
-      return;
-    }
-    isGifFpsModalOpen.value = true;
-  };
-
-  const closeGifFpsModal = () => {
-    isGifFpsModalOpen.value = false;
-  };
-
-  // Handle the split spritesheet result
-  const handleSplitSpritesheet = (spriteFiles: SpriteFile[]) => {
-    // Process sprite files with their positions
-    Promise.all(
-      spriteFiles.map(spriteFile => {
-        return new Promise<Sprite>(resolve => {
-          const url = URL.createObjectURL(spriteFile.file);
-          const img = new Image();
-          img.onload = () => {
-            resolve({
-              id: crypto.randomUUID(),
-              file: spriteFile.file,
-              img,
-              url,
-              width: img.width,
-              height: img.height,
-              x: 0, // Start at top-left of cell; ignore splitter bounding-box offset for display
-              y: 0, // Start at top-left of cell; ignore splitter bounding-box offset for display
-            });
-          };
-          img.src = url;
-        });
-      })
-    ).then(newSprites => {
-      sprites.value = [...sprites.value, ...newSprites];
-    });
-  };
-
-  // Export spritesheet as JSON with base64 images
-  const exportSpritesheetJSON = async () => {
-    if (sprites.value.length === 0) {
-      alert('Nothing to export. Please add sprites first.');
-      return;
-    }
-
-    // Create an array to store sprite data with base64 images
-    const spritesData = await Promise.all(
-      sprites.value.map(async (sprite, index) => {
-        // Create a canvas for each sprite to get its base64 data
-        const canvas = document.createElement('canvas');
-        const ctx = canvas.getContext('2d');
-        if (!ctx) return null;
-
-        // Set canvas size to match the sprite
-        canvas.width = sprite.width;
-        canvas.height = sprite.height;
-
-        // Draw the sprite
-        ctx.drawImage(sprite.img, 0, 0);
-
-        // Get base64 data
-        const base64Data = canvas.toDataURL('image/png');
-
-        return {
-          id: sprite.id,
-          width: sprite.width,
-          height: sprite.height,
-          x: sprite.x,
-          y: sprite.y,
-          base64: base64Data,
-          name: sprite.file.name,
-        };
-      })
-    );
-
-    // Create JSON object with all necessary data
-    const jsonData = {
-      columns: columns.value,
-      sprites: spritesData.filter(Boolean), // Remove any null values
-    };
-
-    // Convert to JSON string
-    const jsonString = JSON.stringify(jsonData, null, 2);
-
-    // Create download link
-    const blob = new Blob([jsonString], { type: 'application/json' });
-    const url = URL.createObjectURL(blob);
-    const link = document.createElement('a');
-    link.download = 'spritesheet.json';
-    link.href = url;
-    link.click();
-
-    // Clean up
-    URL.revokeObjectURL(url);
-  };
-
-  // Open file dialog for JSON import
-  const openJSONImportDialog = () => {
-    jsonFileInput.value?.click();
-  };
-
-  // Handle JSON file selection
-  const handleJSONFileChange = (event: Event) => {
-    const input = event.target as HTMLInputElement;
-    if (input.files && input.files.length > 0) {
-      const jsonFile = input.files[0];
-      importSpritesheetJSON(jsonFile);
-      // Reset input value so uploading the same file again will trigger the event
-      if (jsonFileInput.value) jsonFileInput.value.value = '';
-    }
-  };
-
-  // Import spritesheet from JSON
-  const importSpritesheetJSON = async (jsonFile: File) => {
-    try {
-      const jsonText = await jsonFile.text();
-      const jsonData = JSON.parse(jsonText);
-
-      if (!jsonData.sprites || !Array.isArray(jsonData.sprites)) {
-        throw new Error('Invalid JSON format: missing sprites array');
-      }
-
-      // Set columns if available
-      if (jsonData.columns && typeof jsonData.columns === 'number') {
-        columns.value = jsonData.columns;
-      }
-
-      // Process each sprite
-      // Replace current sprites with imported ones
-      // Revoke existing blob: URLs to avoid memory leaks
-      if (sprites.value.length) {
-        sprites.value.forEach(s => {
-          if (s.url && s.url.startsWith('blob:')) {
-            try {
-              URL.revokeObjectURL(s.url);
-            } catch {}
-          }
-        });
-      }
-
-      sprites.value = await Promise.all(
-        jsonData.sprites.map(async (spriteData: any) => {
-          return new Promise<Sprite>(resolve => {
-            // Create image from base64
-            const img = new Image();
-            img.onload = () => {
-              // Create a file from the base64 data
-              const byteString = atob(spriteData.base64.split(',')[1]);
-              const mimeType = spriteData.base64.split(',')[0].split(':')[1].split(';')[0];
-              const ab = new ArrayBuffer(byteString.length);
-              const ia = new Uint8Array(ab);
-
-              for (let i = 0; i < byteString.length; i++) {
-                ia[i] = byteString.charCodeAt(i);
-              }
-
-              const blob = new Blob([ab], { type: mimeType });
-              const fileName = spriteData.name || `sprite-${spriteData.id}.png`;
-              const file = new File([blob], fileName, { type: mimeType });
-
-              resolve({
-                id: spriteData.id || crypto.randomUUID(),
-                file,
-                img,
-                url: spriteData.base64,
-                width: spriteData.width,
-                height: spriteData.height,
-                x: spriteData.x || 0,
-                y: spriteData.y || 0,
-              });
-            };
-            img.src = spriteData.base64;
-          });
-        })
-      );
-    } catch (error) {
-      console.error('Error importing JSON:', error);
-      alert('Failed to import JSON file. Please check the file format.');
-    }
-  };
-
-  // Add new alignment function
-  const alignSprites = (position: 'left' | 'center' | 'right' | 'top' | 'middle' | 'bottom') => {
-    if (sprites.value.length === 0) return;
-
-    // Find max dimensions for the current column layout
-    let maxWidth = 0;
-    let maxHeight = 0;
-    sprites.value.forEach(sprite => {
-      maxWidth = Math.max(maxWidth, sprite.width);
-      maxHeight = Math.max(maxHeight, sprite.height);
-    });
-
-    sprites.value = sprites.value.map((sprite, index) => {
-      let x = sprite.x;
-      let y = sprite.y;
-
-      switch (position) {
-        case 'left':
-          x = 0;
-          break;
-        case 'center':
-          x = Math.floor((maxWidth - sprite.width) / 2);
-          break;
-        case 'right':
-          x = Math.floor(maxWidth - sprite.width);
-          break;
-        case 'top':
-          y = 0;
-          break;
-        case 'middle':
-          y = Math.floor((maxHeight - sprite.height) / 2);
-          break;
-        case 'bottom':
-          y = Math.floor(maxHeight - sprite.height);
-          break;
-      }
-
-      // Ensure integer positions for pixel-perfect rendering
-      return { ...sprite, x: Math.floor(x), y: Math.floor(y) };
-    });
-
-    // Force redraw of the preview canvas
-    setTimeout(() => {
-      const event = new Event('forceRedraw');
-      window.dispatchEvent(event);
-    }, 0);
-  };
-
-  const updateSpriteCell = (id: string, newIndex: number) => {
-    // Find the current index of the sprite
-    const currentIndex = sprites.value.findIndex(sprite => sprite.id === id);
-    if (currentIndex === -1) return;
-
-    // If we're trying to move to the same position, do nothing
-    if (currentIndex === newIndex) return;
-
-    // Create a copy of the sprites array
-    const newSprites = [...sprites.value];
-
-    // Perform a swap between the two positions
-    if (newIndex < sprites.value.length) {
-      // Get references to both sprites
-      const movingSprite = { ...newSprites[currentIndex] };
-      const targetSprite = { ...newSprites[newIndex] };
-
-      // Swap them
-      newSprites[currentIndex] = targetSprite;
-      newSprites[newIndex] = movingSprite;
-    } else {
-      // If dragging to an empty cell (beyond the array length)
-      // Use the original reordering logic
-      const [movedSprite] = newSprites.splice(currentIndex, 1);
-      newSprites.splice(newIndex, 0, movedSprite);
-    }
-
-    // Update the sprites array
-    sprites.value = newSprites;
-  };
-
-  const removeSprite = (id: string) => {
-    const spriteIndex = sprites.value.findIndex(sprite => sprite.id === id);
-    if (spriteIndex !== -1) {
-      const sprite = sprites.value[spriteIndex];
-      // Revoke the blob URL to prevent memory leaks
-      if (sprite.url && sprite.url.startsWith('blob:')) {
-        try {
-          URL.revokeObjectURL(sprite.url);
-        } catch {}
-      }
-      // Remove the sprite from the array
-      sprites.value.splice(spriteIndex, 1);
-    }
-  };
-
-  const replaceSprite = (id: string, file: File) => {
-    const spriteIndex = sprites.value.findIndex(sprite => sprite.id === id);
-
-    if (spriteIndex !== -1) {
-      const oldSprite = sprites.value[spriteIndex];
-
-      // Revoke the old blob URL to prevent memory leaks
-      if (oldSprite.url && oldSprite.url.startsWith('blob:')) {
-        try {
-          URL.revokeObjectURL(oldSprite.url);
-        } catch {}
-      }
-
-      // Create new sprite from the replacement file
-      const url = URL.createObjectURL(file);
-      const img = new Image();
-      img.onload = () => {
-        const newSprite: Sprite = {
-          id: oldSprite.id, // Keep the same ID
-          file,
-          img,
-          url,
-          width: img.width,
-          height: img.height,
-          x: oldSprite.x, // Keep the same position
-          y: oldSprite.y,
-        };
-        // Create a new array to trigger Vue's reactivity
-        const newSprites = [...sprites.value];
-        newSprites[spriteIndex] = newSprite;
-        sprites.value = newSprites;
-      };
-      img.onerror = () => {
-        console.error('Failed to load replacement image:', file.name);
-        URL.revokeObjectURL(url);
-      };
-      img.src = url;
-    }
-  };
-
-  const addSprite = (file: File) => {
-    const url = URL.createObjectURL(file);
-    const img = new Image();
-    img.onload = () => {
-      const newSprite: Sprite = {
-        id: crypto.randomUUID(),
-        file,
-        img,
-        url,
-        width: img.width,
-        height: img.height,
-        x: 0,
-        y: 0,
-      };
-      sprites.value = [...sprites.value, newSprite];
-    };
-    img.onerror = () => {
-      console.error('Failed to load new sprite image:', file.name);
-      URL.revokeObjectURL(url);
-    };
-    img.src = url;
-  };
-
-  const addSpriteWithResize = (file: File) => {
-    const url = URL.createObjectURL(file);
-    const img = new Image();
-    img.onload = () => {
-      // Find current max dimensions
-      let maxWidth = 0;
-      let maxHeight = 0;
-      sprites.value.forEach(sprite => {
-        maxWidth = Math.max(maxWidth, sprite.width);
-        maxHeight = Math.max(maxHeight, sprite.height);
-      });
-
-      // Create new sprite
-      const newSprite: Sprite = {
-        id: crypto.randomUUID(),
-        file,
-        img,
-        url,
-        width: img.width,
-        height: img.height,
-        x: 0,
-        y: 0,
-      };
-
-      // Calculate new max dimensions after adding the new sprite
-      const newMaxWidth = Math.max(maxWidth, img.width);
-      const newMaxHeight = Math.max(maxHeight, img.height);
-
-      // Resize existing sprites if the new image is larger
-      if (img.width > maxWidth || img.height > maxHeight) {
-        // Update all existing sprites to center them in the new larger cells
-        sprites.value = sprites.value.map(sprite => {
-          let newX = sprite.x;
-          let newY = sprite.y;
-
-          // Adjust x position if width increased
-          if (img.width > maxWidth) {
-            const widthDiff = newMaxWidth - maxWidth;
-            // Try to keep the sprite in the same relative position
-            const relativeX = maxWidth > 0 ? sprite.x / maxWidth : 0;
-            newX = Math.floor(relativeX * newMaxWidth);
-            // Make sure it doesn't go out of bounds
-            newX = Math.max(0, Math.min(newX, newMaxWidth - sprite.width));
-          }
-
-          // Adjust y position if height increased
-          if (img.height > maxHeight) {
-            const heightDiff = newMaxHeight - maxHeight;
-            const relativeY = maxHeight > 0 ? sprite.y / maxHeight : 0;
-            newY = Math.floor(relativeY * newMaxHeight);
-            newY = Math.max(0, Math.min(newY, newMaxHeight - sprite.height));
-          }
-
-          return { ...sprite, x: newX, y: newY };
-        });
-      }
-
-      // Add the new sprite
-      sprites.value = [...sprites.value, newSprite];
-
-      // Force redraw of the canvas
-      setTimeout(() => {
-        const event = new Event('forceRedraw');
-        window.dispatchEvent(event);
-      }, 0);
-    };
-    img.onerror = () => {
-      console.error('Failed to load new sprite image:', file.name);
-      URL.revokeObjectURL(url);
-    };
-    img.src = url;
-  };
-
-  // Download as GIF with specified FPS
-  const downloadAsGif = (fps: number) => {
-    if (sprites.value.length === 0) {
-      alert('Please upload or import sprites before generating a GIF.');
-      return;
-    }
-
-    // Find max dimensions
-    let maxWidth = 0;
-    let maxHeight = 0;
-
-    sprites.value.forEach(sprite => {
-      if (sprite.width > maxWidth) maxWidth = sprite.width;
-      if (sprite.height > maxHeight) maxHeight = sprite.height;
-    });
-
-    // Create a canvas for rendering frames
-    const canvas = document.createElement('canvas');
-    const ctx = canvas.getContext('2d');
-    if (!ctx) return;
-
-    // Set canvas size to just fit one sprite cell
-    canvas.width = maxWidth;
-    canvas.height = maxHeight;
-
-    // Disable image smoothing for pixel-perfect rendering
-    ctx.imageSmoothingEnabled = false;
-
-    // Create GIF encoder
-    const gif = new GIF({
-      workers: 2,
-      quality: 10,
-      width: maxWidth,
-      height: maxHeight,
-      workerScript: gifWorkerUrl,
-    });
-
-    // Add each sprite as a frame
-    sprites.value.forEach(sprite => {
-      // Clear canvas
-      ctx.clearRect(0, 0, canvas.width, canvas.height);
-
-      // Draw grid background (cell)
-      ctx.fillStyle = '#f9fafb';
-      ctx.fillRect(0, 0, maxWidth, maxHeight);
-
-      // Draw sprite
-      ctx.drawImage(sprite.img, Math.floor(sprite.x), Math.floor(sprite.y));
-
-      // Add frame to GIF
-      gif.addFrame(ctx, { copy: true, delay: 1000 / fps });
-    });
-
-    // Generate GIF
-    gif.on('finished', (blob: Blob) => {
-      // Create download link
-      const url = URL.createObjectURL(blob);
-      const link = document.createElement('a');
-      link.download = 'animation.gif';
-      link.href = url;
-      link.click();
-
-      // Clean up
-      URL.revokeObjectURL(url);
-    });
-
-    gif.render();
-  };
-
-  // Check for one-time feedback popup on mount
   onMounted(() => {
     const hasShownFeedbackPopup = localStorage.getItem('hasShownFeedbackPopup');
     if (!hasShownFeedbackPopup) {
-      // Show popup after a short delay to let the page load
       setTimeout(() => {
         showFeedbackPopup.value = true;
       }, 3000);
     }
   });
 
-  // Handle feedback popup response
   const handleFeedbackPopupResponse = (showModal: boolean) => {
     showFeedbackPopup.value = false;
     localStorage.setItem('hasShownFeedbackPopup', 'true');
@@ -850,90 +117,4 @@
       openFeedbackModal();
     }
   };
-
-  // Revoke blob URLs on unmount to avoid memory leaks
-  onUnmounted(() => {
-    sprites.value.forEach(s => {
-      if (s.url && s.url.startsWith('blob:')) {
-        try {
-          URL.revokeObjectURL(s.url);
-        } catch {}
-      }
-    });
-  });
-
-  // Download as ZIP with each cell individually
-  const downloadAsZip = async () => {
-    if (sprites.value.length === 0) {
-      alert('Please upload or import sprites before downloading a ZIP.');
-      return;
-    }
-
-    // Create a new ZIP file
-    const zip = new JSZip();
-
-    // Find max dimensions
-    let maxWidth = 0;
-    let maxHeight = 0;
-
-    sprites.value.forEach(sprite => {
-      if (sprite.width > maxWidth) maxWidth = sprite.width;
-      if (sprite.height > maxHeight) maxHeight = sprite.height;
-    });
-
-    // Create a canvas for rendering individual sprites
-    const canvas = document.createElement('canvas');
-    const ctx = canvas.getContext('2d');
-    if (!ctx) return;
-
-    // Set canvas size to just fit one sprite cell
-    canvas.width = maxWidth;
-    canvas.height = maxHeight;
-
-    // Disable image smoothing for pixel-perfect rendering
-    ctx.imageSmoothingEnabled = false;
-
-    // Add each sprite as an individual file
-    sprites.value.forEach((sprite, index) => {
-      // Clear canvas
-      ctx.clearRect(0, 0, canvas.width, canvas.height);
-
-      // Draw grid background (cell)
-      ctx.fillStyle = '#f9fafb';
-      ctx.fillRect(0, 0, maxWidth, maxHeight);
-
-      // Draw sprite
-      ctx.drawImage(sprite.img, Math.floor(sprite.x), Math.floor(sprite.y));
-
-      // Convert to PNG data URL
-      const dataURL = canvas.toDataURL('image/png');
-
-      // Convert data URL to binary data
-      const binaryData = atob(dataURL.split(',')[1]);
-      const arrayBuffer = new ArrayBuffer(binaryData.length);
-      const uint8Array = new Uint8Array(arrayBuffer);
-
-      for (let i = 0; i < binaryData.length; i++) {
-        uint8Array[i] = binaryData.charCodeAt(i);
-      }
-
-      // Add to ZIP file with clearer naming
-      const baseName = sprite.file?.name ? sprite.file.name.replace(/\s+/g, '_') : `sprite_${index + 1}.png`;
-      const name = `${index + 1}_${baseName}`;
-      zip.file(name, uint8Array);
-    });
-
-    // Generate ZIP file
-    const content = await zip.generateAsync({ type: 'blob' });
-
-    // Create download link
-    const url = URL.createObjectURL(content);
-    const link = document.createElement('a');
-    link.download = 'sprites.zip';
-    link.href = url;
-    link.click();
-
-    // Clean up
-    URL.revokeObjectURL(url);
-  };
 </script>

src/assets/main.css

@@ -4,9 +4,6 @@
 /* Dark mode transition */
 html,
 body {
-  transition:
-    background-color 0.3s ease,
-    color 0.3s ease;
   -webkit-tap-highlight-color: transparent; /* Remove tap highlight on mobile */
 }
 
@@ -37,3 +34,142 @@ html.dark {
     touch-action: manipulation; /* Improve touch responsiveness */
   }
 }
+
+@layer components {
+  .btn {
+    @apply inline-flex items-center justify-center gap-2 px-4 py-2 text-sm rounded-lg transition-all cursor-pointer font-medium focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed active:scale-95;
+  }
+
+  .btn-primary {
+    @apply bg-gray-900 text-white hover:bg-gray-800 dark:bg-gray-100 dark:text-gray-900 dark:hover:bg-gray-200;
+  }
+
+  .btn-secondary {
+    @apply bg-white text-gray-700 border border-gray-200 hover:bg-gray-50 hover:shadow-sm dark:bg-gray-800 dark:text-gray-200 dark:border-gray-700 dark:hover:bg-gray-700;
+  }
+
+  .btn-ghost {
+    @apply text-gray-600 hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800;
+  }
+
+  .btn-danger {
+    @apply text-red-600 hover:bg-red-50 dark:text-red-400 dark:hover:bg-red-900/30;
+  }
+
+  .btn-dark {
+    @apply bg-gray-700 text-white hover:bg-gray-800 dark:bg-gray-600 dark:hover:bg-gray-700;
+  }
+
+  .btn-sm {
+    @apply px-3 py-1.5 text-xs;
+  }
+
+  .btn-md {
+    @apply px-4 py-2 text-sm;
+  }
+
+  .btn-icon {
+    @apply p-2;
+  }
+
+  .btn-icon-sm {
+    @apply p-1.5;
+  }
+
+  .btn-icon-xs {
+    @apply p-1;
+  }
+
+  .input-field {
+    @apply px-2 py-1 text-sm border border-gray-300 rounded outline-none focus:ring-2 focus:ring-gray-500 dark:border-gray-600 dark:bg-gray-700 dark:text-gray-100;
+  }
+
+  .card {
+    @apply bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg;
+  }
+
+  /* Custom prose styles for blog content */
+  .prose {
+    @apply text-gray-700 dark:text-gray-300 leading-7;
+  }
+
+  .prose h1 {
+    @apply text-4xl font-bold text-gray-900 dark:text-white mb-4 mt-0;
+  }
+
+  .prose h2 {
+    @apply text-3xl font-bold text-gray-900 dark:text-white mt-8 mb-4;
+  }
+
+  .prose h3 {
+    @apply text-2xl font-bold text-gray-900 dark:text-white mt-6 mb-3;
+  }
+
+  .prose h4 {
+    @apply text-xl font-bold text-gray-900 dark:text-white mt-4 mb-2;
+  }
+
+  .prose p {
+    @apply text-gray-700 dark:text-gray-300 mb-4 leading-7;
+  }
+
+  .prose a {
+    @apply text-blue-600 dark:text-blue-400 underline hover:text-blue-800 dark:hover:text-blue-300;
+  }
+
+  .prose strong {
+    @apply text-gray-900 dark:text-white font-semibold;
+  }
+
+  .prose em {
+    @apply italic;
+  }
+
+  .prose code {
+    @apply text-sm font-mono bg-gray-100 dark:bg-gray-800 text-gray-900 dark:text-gray-100 px-1 py-0.5 rounded;
+  }
+
+  .prose pre {
+    @apply bg-gray-100 dark:bg-gray-800 text-gray-800 dark:text-gray-200 p-4 rounded-lg overflow-x-auto mb-4;
+  }
+
+  .prose pre code {
+    @apply bg-transparent p-0;
+  }
+
+  .prose ul {
+    @apply list-disc pl-6 mb-4 text-gray-700 dark:text-gray-300;
+  }
+
+  .prose ol {
+    @apply list-decimal pl-6 mb-4 text-gray-700 dark:text-gray-300;
+  }
+
+  .prose li {
+    @apply mb-2 leading-7;
+  }
+
+  .prose blockquote {
+    @apply border-l-4 border-gray-300 dark:border-gray-600 pl-4 italic text-gray-600 dark:text-gray-400 my-4;
+  }
+
+  .prose img {
+    @apply rounded-lg shadow-md my-6;
+  }
+
+  .prose hr {
+    @apply border-gray-300 dark:border-gray-700 my-8;
+  }
+
+  .prose table {
+    @apply border-collapse w-full my-6;
+  }
+
+  .prose th {
+    @apply bg-gray-100 dark:bg-gray-800 p-2 text-left font-semibold border border-gray-300 dark:border-gray-700;
+  }
+
+  .prose td {
+    @apply border border-gray-300 dark:border-gray-700 p-2;
+  }
+}

src/blog/welcome.md

@@ -0,0 +1,23 @@
+---
+title: 'Welcome to the Spritesheet generator blog'
+date: '2025-11-26'
+description: 'This is the first post on our new blog. Learn about how we built this tool.'
+image: '/blog/1.png'
+---
+
+## Welcome!
+
+We are excited to launch our new blog. Here we will share updates, tutorials, and tips on how to get the most out of the Sprite Sheet Generator.
+
+### What is this tool?
+
+This tool allows you to easily combine multiple images into a single sprite sheet. It's perfect for game developers and web designers.
+
+### Features
+
+- Drag and drop interface
+- Customizable grid size
+- Export to PNG and JSON
+- Dark mode support
+
+Stay tuned for more updates!

src/blog/why-pixel-art.md

@@ -0,0 +1,97 @@
+---
+title: 'Why pixel art without proper spritesheet tools is holding you back'
+date: '2025-11-26'
+description: 'Pixel art is already challenging. Why make it harder?'
+image: '/blog/2.jpg'
+---
+
+If you've worked on game projects with pixel art, you know the pain: managing dozens of individual sprite files, keeping track of animation frames, and organizing everything into a format your game engine can use. It's tedious, error-prone, and kills your creative flow.
+
+## The pixel art workflow nightmare
+
+### The zoom dance problem
+
+Pixel artists constantly switch between magnified and unmagnified views. At 500% zoom, you place individual pixels. At 100%, you check if they create the intended effect. You need to see both the micro details and the macro picture—but you can't do both at once.
+
+This back-and-forth is exhausting, especially when you discover a single shade-too-dark pixel throws off your entire composition.
+
+### File management chaos
+
+Creating a character with idle, walking, running, jumping, and attacking animations? Each with 8-12 frames? That's 40-60+ individual image files for one character.
+
+Managing these manually means:
+
+- Tracking which file belongs to which animation
+- Ensuring consistent sizing across all frames
+- Organizing files in the right sequence
+- Exporting each frame separately
+- Hoping you didn't skip or misname anything
+
+### The multi-tool trap
+
+Many developers juggle multiple applications:
+
+1. Sketch in a drawing program
+2. Refine in a pixel art editor
+3. Export individual frames
+4. Resize in an image editor
+5. Manually arrange in another tool
+6. Export as a spritesheet
+7. Create data files for your game engine
+8. Find an error in frame 23
+9. Start over
+
+One developer described the frustration: the feedback loop was too long. They couldn't see what the finished art would look like until after going through multiple tools. Details that looked great in high-res turned sloppy after conversion.
+
+## Why spritesheets matter
+
+Sprite sheets aren't optional—they're essential for game development:
+
+- **Better performance**: One file instead of 50+ individual image requests
+- **Simpler management**: One file instead of dozens
+- **Proper animation**: Frame data embedded or easily referenced
+- **Optimized memory**: Better texture packing, less wasted space
+
+But creating them manually is painful. You need to calculate optimal layouts, ensure consistent spacing, maintain pixel-perfect alignment, and generate metadata. One mistake breaks your animations.
+
+## The solution: dedicated spritesheet generators
+
+This is where [spritesheetgenerator.online](https://spritesheetgenerator.online) changes everything.
+
+Instead of the multi-tool nightmare, you get:
+
+1. **Upload sprites**: Drag and drop your images
+2. **Automatic arrangement**: Intelligent optimal layout
+3. **Preview animations**: See your work in real-time
+4. **Export everything**: Spritesheet image and data files ready to use
+
+### Why this matters
+
+**Faster iteration**: Change frame 7? Re-upload and regenerate in seconds instead of minutes.
+
+**Consistent results**: No more alignment worries. The tool handles technical details.
+
+**Immediate preview**: See frames flow together, check light-blending in motion, verify timing—all before exporting.
+
+**Professional output**: Properly formatted spritesheets that drop right into your game engine.
+
+### Free and accessible
+
+Being browser-based means:
+
+- No installation required
+- Works on any device
+- No subscriptions or licenses
+- Access from anywhere
+
+For indie developers, hobbyists, or students with limited budgets, this is game-changing.
+
+## The bottom line
+
+Pixel art requires precision and patience. That's part of what makes it rewarding. But there's no reason to add unnecessary complexity with manual file management and multi-tool workflows.
+
+Your creative energy should go into placing pixels with intention and crafting smooth animations—not file wrangling.
+
+Using a proper spritesheet generator doesn't make you less of an artist. It makes you a smarter one.
+
+The pixel art is hard enough. The workflow doesn't have to be.

src/components/Breadcrumbs.vue

@@ -0,0 +1,63 @@
+<script setup lang="ts">
+  import { computed } from 'vue';
+  import { useRoute } from 'vue-router';
+  import { RouterLink } from 'vue-router';
+
+  const route = useRoute();
+
+  interface BreadcrumbItem {
+    name: string;
+    path: string;
+  }
+
+  const breadcrumbs = computed<BreadcrumbItem[]>(() => {
+    const items: BreadcrumbItem[] = [{ name: 'Home', path: '/' }];
+
+    // Map route names to breadcrumb labels
+    const routeLabels: Record<string, string> = {
+      'blog-overview': 'Blog',
+      'blog-detail': 'Blog',
+      about: 'About Us',
+      contact: 'Contact',
+      'privacy-policy': 'Privacy Policy',
+      faq: 'FAQ',
+    };
+
+    if (route.name && route.name !== 'home') {
+      const routeName = route.name.toString();
+
+      if (routeName === 'blog-detail') {
+        // For blog detail pages, add Blog first, then the post title
+        items.push({ name: 'Blog', path: '/blog' });
+
+        // Get the post title from route meta or params if available
+        const postTitle = (route.meta.title as string) || 'Article';
+        items.push({ name: postTitle, path: route.path });
+      } else if (routeLabels[routeName]) {
+        items.push({ name: routeLabels[routeName], path: route.path });
+      }
+    }
+
+    return items;
+  });
+
+  const shouldShowBreadcrumbs = computed(() => {
+    return breadcrumbs.value.length > 1 && route.name !== 'home';
+  });
+</script>
+
+<template>
+  <nav v-if="shouldShowBreadcrumbs" aria-label="Breadcrumb" class="mb-4">
+    <ol class="flex items-center gap-2 text-sm text-gray-600 dark:text-gray-400">
+      <li v-for="(item, index) in breadcrumbs" :key="item.path" class="flex items-center gap-2">
+        <RouterLink v-if="index < breadcrumbs.length - 1" :to="item.path" class="hover:text-gray-900 dark:hover:text-white transition-colors" :aria-label="`Navigate to ${item.name}`">
+          {{ item.name }}
+        </RouterLink>
+        <span v-else class="font-medium text-gray-900 dark:text-white" aria-current="page">
+          {{ item.name }}
+        </span>
+        <i v-if="index < breadcrumbs.length - 1" class="fas fa-chevron-right text-xs text-gray-400"></i>
+      </li>
+    </ol>
+  </nav>
+</template>

src/components/FileUploader.vue

@@ -1,9 +1,9 @@
 <template>
   <div
-    class="border-2 border-dashed rounded-xl p-4 sm:p-8 text-center transition-all duration-200"
+    class="relative border-3 border-dashed rounded-2xl p-8 sm:p-12 text-center transition-all duration-300 cursor-pointer group overflow-hidden"
     :class="{
-      'border-blue-300 bg-blue-50 dark:border-blue-500 dark:bg-blue-900/30': isDragging,
+      'border-blue-400 bg-blue-50 dark:border-blue-400 dark:bg-blue-900/40 scale-[1.02]': isDragging,
-      'border-gray-200 hover:border-blue-300 hover:bg-gray-50 dark:border-gray-600 dark:hover:border-blue-500 dark:hover:bg-gray-700/50': !isDragging,
+      'border-gray-300 bg-gray-50/50 hover:border-blue-400 hover:bg-blue-50/80 dark:border-gray-600 dark:bg-gray-800/30 dark:hover:border-blue-400 dark:hover:bg-blue-900/30': !isDragging,
     }"
     @dragenter.prevent="isDragging = true"
     @dragleave.prevent="isDragging = false"
@@ -12,20 +12,36 @@
     @click="openFileDialog"
     data-rybbit-event="file-upload-area"
   >
+    <div class="absolute inset-0 bg-blue-400/0 group-hover:bg-blue-400/5 transition-all duration-300"></div>
+
     <input ref="fileInput" type="file" multiple accept="image/*,.json" class="hidden" @change="handleFileChange" />
 
-    <div class="mb-4 sm:mb-6">
+    <div class="relative z-10">
-      <img src="@/assets/images/file.svg" alt="File upload" class="w-16 h-16 sm:w-20 sm:h-20 mx-auto mb-2 sm:mb-4 opacity-75 dark:invert" />
+      <div class="mb-6 transform transition-transform duration-300" :class="isDragging ? 'scale-110' : 'group-hover:scale-105'">
+        <div class="w-20 h-20 sm:w-24 sm:h-24 mx-auto mb-4 bg-blue-100 dark:bg-blue-900/50 rounded-2xl flex items-center justify-center shadow-lg">
+          <i class="fas fa-cloud-upload-alt text-4xl sm:text-5xl text-blue-600 dark:text-blue-400"></i>
+        </div>
       </div>
 
-    <p class="text-lg sm:text-xl font-medium text-gray-700 dark:text-gray-200 mb-2">Drag and drop your sprite images or JSON file here</p>
+      <h3 class="text-xl sm:text-2xl font-bold text-gray-800 dark:text-gray-100 mb-3">
-    <p class="text-sm text-gray-500 dark:text-gray-400 mb-4 sm:mb-6">or</p>
+        <span v-if="isDragging">Drop your files here</span>
+        <span v-else>Upload Your Sprites</span>
+      </h3>
+      <p class="text-base sm:text-lg text-gray-600 dark:text-gray-300 mb-2">Drag and drop sprite images or JSON files</p>
+      <p class="text-sm text-gray-500 dark:text-gray-400 mb-8">Supports PNG, JPG, GIF, and JSON</p>
 
-    <button class="w-full sm:w-auto px-6 py-3 sm:py-2.5 bg-blue-500 hover:bg-blue-600 text-white font-medium rounded-lg transition-colors flex sm:inline-flex items-center justify-center space-x-2 cursor-pointer" data-rybbit-event="select-files">
+      <div class="flex items-center justify-center gap-4 mb-6">
-      <i class="fas fa-folder-open"></i>
+        <div class="h-px flex-1 bg-gray-300 dark:bg-gray-600"></div>
-      <span>Select files</span>
+        <span class="text-xs font-semibold text-gray-500 dark:text-gray-400 uppercase">or</span>
+        <div class="h-px flex-1 bg-gray-300 dark:bg-gray-600"></div>
+      </div>
+
+      <button class="px-8 py-3.5 bg-blue-500 hover:bg-blue-600 dark:bg-blue-600 dark:hover:bg-blue-700 text-white font-semibold rounded-xl shadow-lg hover:shadow-xl transition-all transform hover:scale-105 flex items-center justify-center gap-3 mx-auto" data-rybbit-event="select-files">
+        <i class="fas fa-folder-open text-lg"></i>
+        <span>Browse Files</span>
       </button>
     </div>
+  </div>
 </template>
 
 <script setup lang="ts">

src/components/HelpModal.vue

@@ -23,7 +23,7 @@
 
           <div class="max-w-none text-gray-700 dark:text-gray-300">
             <p class="mb-4 text-base leading-relaxed">Spritesheet generator is a free, open-source tool for creating spritesheets for game development and animation projects. This tool allows you to upload individual sprite images and arrange them into a spritesheet with customizable layout.</p>
-            <p class="mb-4 text-base leading-relaxed">Matrix: root@adhd.sh, Discord: nu11ed</p>
+            <p class="mb-4 text-base leading-relaxed">Matrix: root@adhd.sh, Discord: streetshadow</p>
             <h4 class="mt-6 mb-3 text-lg font-medium text-gray-900 dark:text-gray-100">How to use:</h4>
             <ol class="list-decimal pl-6 space-y-2 mb-4">
               <li>Upload your sprite images by dragging and dropping them or clicking the upload area</li>
@@ -56,6 +56,16 @@
           </p>
 
           <div class="space-y-6">
+            <!-- Ko-fi -->
+            <div class="p-4 bg-gray-50 dark:bg-gray-700 rounded-lg border border-gray-200 dark:border-gray-600">
+              <div class="flex items-center mb-3">
+                <h4 class="text-md font-medium">Ko-fi</h4>
+              </div>
+              <a href="https://ko-fi.com/X8X416D44P" target="_blank" rel="noopener noreferrer" data-rybbit-event="open-kofi">
+                <img height="36" style="border: 0px; height: 36px" src="https://storage.ko-fi.com/cdn/kofi6.png?v=6" alt="Buy Me a Coffee at ko-fi.com" />
+              </a>
+            </div>
+
             <!-- PayPal -->
             <div class="p-4 bg-gray-50 dark:bg-gray-700 rounded-lg border border-gray-200 dark:border-gray-600">
               <div class="flex items-center mb-3">

src/components/SpritePreview.vue

@@ -1,24 +1,74 @@
 <template>
-  <div class="spritesheet-preview w-full">
+  <div class="spritesheet-preview w-full h-full">
-    <!-- Main Layout: Canvas Left, Controls Right -->
+    <div class="flex flex-col lg:flex-row gap-4 h-full">
-    <div class="flex flex-col lg:flex-row gap-4">
+      <div class="flex-1 min-w-0 flex flex-col">
-      <!-- Canvas Area (Left/Main) -->
+        <div
-      <div class="flex-1 min-w-0">
+          class="relative bg-gray-50 dark:bg-gray-800 border border-gray-300 dark:border-gray-700 rounded-lg overflow-auto flex-1 min-h-[300px] max-h-[calc(100vh-12rem)] shadow-sm hover:shadow-md transition-shadow duration-200"
-        <div class="relative bg-gray-50 dark:bg-gray-800 border border-gray-300 dark:border-gray-700 rounded-lg overflow-auto min-h-[300px] sm:min-h-[520px] shadow-sm hover:shadow-md transition-shadow duration-200">
-          <canvas
-            ref="previewCanvasRef"
-            @mousedown="startDrag"
           @mousemove="drag"
           @mouseup="stopDrag"
           @mouseleave="stopDrag"
-            @touchstart="handleTouchStart"
           @touchmove="handleTouchMove"
           @touchend="stopDrag"
-            class="block touch-manipulation"
-            :class="{ 'cursor-move': isDraggable }"
-            :style="{ transform: `scale(${zoom})`, transformOrigin: 'top left', ...(settingsStore.pixelPerfect ? { 'image-rendering': 'pixelated' } : {}) }"
         >
-          </canvas>
+          <div
+            ref="previewContainerRef"
+            class="relative touch-manipulation inline-block"
+            :style="{
+              transform: `scale(${zoom})`,
+              transformOrigin: 'top left',
+              width: `${cellDimensions.cellWidth}px`,
+              height: `${cellDimensions.cellHeight}px`,
+              backgroundColor: '#f9fafb',
+              backgroundImage: getPreviewBackgroundImage(),
+              backgroundSize: settingsStore.backgroundColor === 'transparent' ? '20px 20px' : 'auto',
+              backgroundPosition: settingsStore.backgroundColor === 'transparent' ? '0 0, 0 10px, 10px -10px, -10px 0px' : '0 0',
+              border: `1px solid ${settingsStore.darkMode ? '#4b5563' : '#e5e7eb'}`,
+            }"
+          >
+            <!-- Background sprites (dimmed for comparison) -->
+            <template v-if="showAllSprites">
+              <template v-for="i in maxFrames()" :key="`bg-${i - 1}`">
+                <template v-if="i - 1 !== currentFrameIndex && !hiddenFrames.includes(i - 1)">
+                  <template v-for="layer in getVisibleLayers()" :key="`${layer.id}-${i - 1}`">
+                    <img
+                      v-if="layer.sprites[i - 1]"
+                      :src="layer.sprites[i - 1].url"
+                      class="absolute pointer-events-none"
+                      :style="{
+                        left: `${cellDimensions.negativeSpacing + layer.sprites[i - 1].x}px`,
+                        top: `${cellDimensions.negativeSpacing + layer.sprites[i - 1].y}px`,
+                        width: `${layer.sprites[i - 1].width}px`,
+                        height: `${layer.sprites[i - 1].height}px`,
+                        opacity: '0.3',
+                        imageRendering: settingsStore.pixelPerfect ? 'pixelated' : 'auto',
+                      }"
+                      draggable="false"
+                    />
+                  </template>
+                </template>
+              </template>
+            </template>
+
+            <!-- Current frame sprites -->
+            <template v-for="layer in getVisibleLayers()" :key="layer.id">
+              <img
+                v-if="layer.sprites[currentFrameIndex]"
+                :src="layer.sprites[currentFrameIndex].url"
+                class="absolute"
+                :class="{ 'cursor-move': isDraggable }"
+                :style="{
+                  left: `${cellDimensions.negativeSpacing + layer.sprites[currentFrameIndex].x}px`,
+                  top: `${cellDimensions.negativeSpacing + layer.sprites[currentFrameIndex].y}px`,
+                  width: `${layer.sprites[currentFrameIndex].width}px`,
+                  height: `${layer.sprites[currentFrameIndex].height}px`,
+                  imageRendering: settingsStore.pixelPerfect ? 'pixelated' : 'auto',
+                }"
+                @mousedown="startDrag($event, layer.sprites[currentFrameIndex], layer.id)"
+                @touchstart="handleTouchStart($event, layer.sprites[currentFrameIndex], layer.id)"
+                draggable="false"
+              />
+            </template>
+          </div>
 
           <!-- Mobile zoom controls -->
           <div class="absolute bottom-3 right-3 flex space-x-2 lg:hidden bg-white/80 dark:bg-gray-800/80 p-2 rounded-lg shadow-md">
@@ -32,119 +82,140 @@
         </div>
       </div>
 
-      <!-- Controls Sidebar (Right) -->
       <div class="lg:w-80 xl:w-96 flex-shrink-0">
-        <div class="bg-white dark:bg-gray-800 rounded-lg border border-gray-200 dark:border-gray-700 p-4 space-y-4">
+        <div class="bg-white dark:bg-gray-800 rounded-xl border border-gray-200 dark:border-gray-700 shadow-sm overflow-hidden">
           <!-- Playback Controls -->
-          <div class="space-y-3">
+          <div class="p-4 border-b border-gray-100 dark:border-gray-700">
-            <h3 class="text-sm font-semibold text-gray-700 dark:text-gray-300 uppercase tracking-wide">Playback</h3>
+            <h3 class="text-xs font-bold text-gray-400 dark:text-gray-500 uppercase tracking-wider mb-3">Playback</h3>
             <div class="flex items-center gap-2">
-              <button @click="togglePlayback" class="flex items-center justify-center gap-1.5 bg-blue-500 hover:bg-blue-600 text-white px-4 py-2 rounded-md transition-colors cursor-pointer flex-1">
+              <button @click="togglePlayback" class="flex items-center justify-center gap-2 bg-blue-600 hover:bg-blue-700 text-white px-4 py-2.5 rounded-lg transition-all cursor-pointer flex-1 shadow-sm active:scale-95">
-                <span v-if="isPlaying" class="flex items-center gap-1.5">
+                <span v-if="isPlaying" class="flex items-center gap-2 font-medium">
-                  <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" class="w-5 h-5">
+                  <i class="fas fa-pause"></i>
-                    <path fill-rule="evenodd" d="M6.75 5.25a.75.75 0 01.75-.75H9a.75.75 0 01.75.75v13.5a.75.75 0 01-.75.75H7.5a.75.75 0 01-.75-.75V5.25zm7.5 0A.75.75 0 0115 4.5h1.5a.75.75 0 01.75.75v13.5a.75.75 0 01-.75.75H15a.75.75 0 01-.75-.75V5.25z" clip-rule="evenodd" />
-                  </svg>
                   Pause
                 </span>
-                <span v-else class="flex items-center gap-1.5">
+                <span v-else class="flex items-center gap-2 font-medium">
-                  <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" class="w-5 h-5">
+                  <i class="fas fa-play"></i>
-                    <path fill-rule="evenodd" d="M4.5 5.653c0-1.426 1.529-2.33 2.779-1.643l11.54 6.348c1.295.712 1.295 2.573 0 3.285L7.28 19.991c-1.25.687-2.779-.217-2.779-1.643V5.653z" clip-rule="evenodd" />
-                  </svg>
                   Play
                 </span>
               </button>
-              <button @click="previousFrame" class="bg-gray-200 hover:bg-gray-300 dark:bg-gray-700 dark:hover:bg-gray-600 p-2 rounded-md transition-colors duration-200 cursor-pointer" :disabled="isPlaying" :class="{ 'opacity-50 cursor-not-allowed': isPlaying }">
+              <button @click="previousFrame" class="btn btn-secondary btn-icon rounded-lg" :disabled="isPlaying" :class="{ 'opacity-50 cursor-not-allowed': isPlaying }">
-                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" class="w-5 h-5 dark:text-gray-200">
+                <i class="fas fa-step-backward"></i>
-                  <path fill-rule="evenodd" d="M11.78 5.22a.75.75 0 01.75.75v12.06l4.72-4.72a.75.75 0 111.06 1.06l-6 6a.75.75 0 01-1.06 0l-6-6a.75.75 0 011.06-1.06l4.72 4.72V5.97a.75.75 0 01.75-.75z" clip-rule="evenodd" transform="rotate(90 12 12)" />
-                </svg>
               </button>
-              <button @click="nextFrame" class="bg-gray-200 hover:bg-gray-300 dark:bg-gray-700 dark:hover:bg-gray-600 p-2 rounded-md transition-colors duration-200 cursor-pointer" :disabled="isPlaying" :class="{ 'opacity-50 cursor-not-allowed': isPlaying }">
+              <button @click="nextFrame" class="btn btn-secondary btn-icon rounded-lg" :disabled="isPlaying" :class="{ 'opacity-50 cursor-not-allowed': isPlaying }">
-                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" class="w-5 h-5 dark:text-gray-200">
+                <i class="fas fa-step-forward"></i>
-                  <path fill-rule="evenodd" d="M11.78 5.22a.75.75 0 01.75.75v12.06l4.72-4.72a.75.75 0 111.06 1.06l-6 6a.75.75 0 01-1.06 0l-6-6a.75.75 0 011.06-1.06l4.72 4.72V5.97a.75.75 0 01.75-.75z" clip-rule="evenodd" transform="rotate(-90 12 12)" />
-                </svg>
               </button>
             </div>
           </div>
 
-          <!-- Sliders -->
+          <!-- Animation Settings -->
-          <div class="space-y-3">
+          <div class="p-4 border-b border-gray-100 dark:border-gray-700 space-y-5">
-            <h3 class="text-sm font-semibold text-gray-700 dark:text-gray-300 uppercase tracking-wide">Controls</h3>
+            <h3 class="text-xs font-bold text-gray-400 dark:text-gray-500 uppercase tracking-wider mb-1">Animation</h3>
 
             <!-- Frame Navigation -->
-            <div class="space-y-1">
+            <div class="space-y-2">
               <div class="flex justify-between items-center">
-                <span class="text-xs font-medium text-gray-600 dark:text-gray-400">Frame</span>
+                <span class="text-sm font-medium text-gray-700 dark:text-gray-300">Frame</span>
-                <span class="text-xs font-mono text-gray-700 dark:text-gray-300">{{ visibleFrameNumber }}/{{ visibleFramesCount }}</span>
+                <span class="text-xs font-mono text-gray-500 dark:text-gray-400 bg-gray-100 dark:bg-gray-700 px-2 py-0.5 rounded">{{ visibleFrameNumber }} / {{ visibleFramesCount }}</span>
               </div>
-              <input type="range" min="0" :max="visibleFrames.length - 1" :value="visibleFrameIndex" @input="handleSliderInput" class="w-full h-2 bg-gray-200 dark:bg-gray-700 rounded-lg appearance-none cursor-pointer accent-blue-500" :disabled="isPlaying" :class="{ 'opacity-50': isPlaying }" />
+              <input type="range" min="0" :max="visibleFrames.length - 1" :value="visibleFrameIndex" @input="handleSliderInput" class="w-full h-1.5 bg-gray-200 dark:bg-gray-700 rounded-lg appearance-none cursor-pointer accent-blue-600" :disabled="isPlaying" :class="{ 'opacity-50': isPlaying }" />
             </div>
 
             <!-- FPS Control -->
-            <div class="space-y-1">
+            <div class="space-y-2">
               <div class="flex justify-between items-center">
-                <span class="text-xs font-medium text-gray-600 dark:text-gray-400">FPS</span>
+                <span class="text-sm font-medium text-gray-700 dark:text-gray-300">Speed (FPS)</span>
-                <span class="text-xs font-mono text-gray-700 dark:text-gray-300">{{ fps }}</span>
+                <span class="text-xs font-mono text-gray-500 dark:text-gray-400 bg-gray-100 dark:bg-gray-700 px-2 py-0.5 rounded">{{ fps }}</span>
               </div>
-              <input type="range" min="1" max="60" v-model.number="fps" class="w-full h-2 bg-gray-200 dark:bg-gray-700 rounded-lg appearance-none cursor-pointer accent-blue-500" />
+              <input type="range" min="1" max="60" v-model.number="fps" class="w-full h-1.5 bg-gray-200 dark:bg-gray-700 rounded-lg appearance-none cursor-pointer accent-blue-600" />
             </div>
+          </div>
+
+          <!-- View Options -->
+          <div class="p-4 space-y-5">
+            <h3 class="text-xs font-bold text-gray-400 dark:text-gray-500 uppercase tracking-wider mb-1">View Options</h3>
 
             <!-- Zoom Control -->
-            <div class="space-y-1">
-              <div class="flex justify-between items-center">
-                <span class="text-xs font-medium text-gray-600 dark:text-gray-400">Zoom</span>
-                <span class="text-xs font-mono text-gray-700 dark:text-gray-300">{{ Math.round(zoom * 100) }}%</span>
-              </div>
-              <input type="range" min="0.5" max="5" step="0.1" v-model.number="zoom" class="w-full h-2 bg-gray-200 dark:bg-gray-700 rounded-lg appearance-none cursor-pointer accent-blue-500" />
-            </div>
-          </div>
-
-          <!-- Options -->
-          <div class="space-y-3">
-            <h3 class="text-sm font-semibold text-gray-700 dark:text-gray-300 uppercase tracking-wide">Options</h3>
             <div class="space-y-2">
-              <label class="flex items-center gap-2 cursor-pointer">
+              <div class="flex justify-between items-center">
-                <input type="checkbox" v-model="isDraggable" class="w-4 h-4 text-blue-500 focus:ring-blue-400 rounded border-gray-300 dark:border-gray-600 dark:bg-gray-700" />
+                <span class="text-sm font-medium text-gray-700 dark:text-gray-300">Zoom</span>
-                <span class="text-sm dark:text-gray-200">Reposition</span>
+                <span class="text-xs font-mono text-gray-500 dark:text-gray-400 bg-gray-100 dark:bg-gray-700 px-2 py-0.5 rounded">{{ Math.round(zoom * 100) }}%</span>
+              </div>
+              <input type="range" min="0.5" max="5" step="0.1" v-model.number="zoom" class="w-full h-1.5 bg-gray-200 dark:bg-gray-700 rounded-lg appearance-none cursor-pointer accent-blue-600" />
+            </div>
+
+            <!-- Toggles -->
+            <div class="space-y-3 pt-2">
+              <label class="flex items-center justify-between cursor-pointer group">
+                <span class="text-sm text-gray-700 dark:text-gray-300 group-hover:text-gray-900 dark:group-hover:text-gray-100 transition-colors">Pixel perfect</span>
+                <div class="relative inline-flex items-center cursor-pointer">
+                  <input type="checkbox" v-model="settingsStore.pixelPerfect" class="sr-only peer" />
+                  <div
+                    class="w-9 h-5 bg-gray-200 peer-focus:outline-none peer-focus:ring-2 peer-focus:ring-blue-300 dark:peer-focus:ring-blue-800 rounded-full peer dark:bg-gray-700 peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-4 after:w-4 after:transition-all dark:border-gray-600 peer-checked:bg-blue-600"
+                  ></div>
+                </div>
               </label>
 
-              <label class="flex items-center gap-2 cursor-pointer">
+              <label class="flex items-center justify-between cursor-pointer group">
-                <input type="checkbox" v-model="showAllSprites" class="w-4 h-4 text-blue-500 focus:ring-blue-400 rounded border-gray-300 dark:border-gray-600 dark:bg-gray-700" />
+                <span class="text-sm text-gray-700 dark:text-gray-300 group-hover:text-gray-900 dark:group-hover:text-gray-100 transition-colors">Reposition mode</span>
-                <span class="text-sm dark:text-gray-200">Compare sprites</span>
+                <div class="relative inline-flex items-center cursor-pointer">
+                  <input type="checkbox" v-model="isDraggable" class="sr-only peer" />
+                  <div
+                    class="w-9 h-5 bg-gray-200 peer-focus:outline-none peer-focus:ring-2 peer-focus:ring-blue-300 dark:peer-focus:ring-blue-800 rounded-full peer dark:bg-gray-700 peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-4 after:w-4 after:transition-all dark:border-gray-600 peer-checked:bg-blue-600"
+                  ></div>
+                </div>
               </label>
 
-              <label class="flex items-center gap-2 cursor-pointer">
+              <div class="pl-4 border-l-2 border-gray-100 dark:border-gray-700 transition-all" :class="{ 'opacity-50 pointer-events-none': !isDraggable }">
-                <input type="checkbox" v-model="settingsStore.pixelPerfect" class="w-4 h-4 text-blue-500 focus:ring-blue-400 rounded border-gray-300 dark:border-gray-600 dark:bg-gray-700" @change="drawPreviewCanvas" />
+                <label class="flex items-center justify-between cursor-pointer group">
-                <span class="text-sm dark:text-gray-200">Pixel perfect</span>
+                  <span class="text-sm text-gray-600 dark:text-gray-400 group-hover:text-gray-800 dark:group-hover:text-gray-200 transition-colors">Apply to all layers</span>
+                  <input type="checkbox" v-model="repositionAllLayers" class="w-4 h-4 text-blue-600 rounded border-gray-300 focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600" :disabled="!isDraggable" />
+                </label>
+              </div>
+
+              <label class="flex items-center justify-between cursor-pointer group">
+                <span class="text-sm text-gray-700 dark:text-gray-300 group-hover:text-gray-900 dark:group-hover:text-gray-100 transition-colors">Compare sprites</span>
+                <div class="relative inline-flex items-center cursor-pointer">
+                  <input type="checkbox" v-model="showAllSprites" class="sr-only peer" />
+                  <div
+                    class="w-9 h-5 bg-gray-200 peer-focus:outline-none peer-focus:ring-2 peer-focus:ring-blue-300 dark:peer-focus:ring-blue-800 rounded-full peer dark:bg-gray-700 peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-4 after:w-4 after:transition-all dark:border-gray-600 peer-checked:bg-blue-600"
+                  ></div>
+                </div>
               </label>
             </div>
           </div>
 
           <!-- Current frame offset display -->
-          <div v-if="props.sprites[currentFrameIndex]" class="p-2 bg-gray-100 dark:bg-gray-700 rounded-md border border-gray-200 dark:border-gray-600">
+          <div v-if="currentFrameSprite" class="px-4 pb-4">
-            <div class="flex items-center justify-between">
+            <div class="p-3 bg-gray-50 dark:bg-gray-700/50 rounded-lg border border-gray-100 dark:border-gray-700 flex items-center justify-between">
-              <span class="text-xs font-medium text-gray-600 dark:text-gray-400">Offset</span>
+              <span class="text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wide">Offset</span>
-              <span class="text-xs font-mono font-semibold text-cyan-600 dark:text-cyan-400">x: {{ props.sprites[currentFrameIndex].x }}, y: {{ props.sprites[currentFrameIndex].y }}</span>
+              <span class="text-xs font-mono font-bold text-gray-700 dark:text-gray-200">X: {{ currentFrameSprite.x }} <span class="text-gray-300 dark:text-gray-600 mx-1">|</span> Y: {{ currentFrameSprite.y }}</span>
             </div>
           </div>
 
           <!-- Frame Selection (when Compare sprites is enabled) -->
-          <div v-if="showAllSprites" class="space-y-2">
+          <div v-if="showAllSprites" class="border-t border-gray-100 dark:border-gray-700 p-4">
-            <div class="flex items-center justify-between">
+            <div class="flex items-center justify-between mb-3">
-              <h3 class="text-sm font-semibold text-gray-700 dark:text-gray-300 uppercase tracking-wide">Frames</h3>
+              <h3 class="text-xs font-bold text-gray-400 dark:text-gray-500 uppercase tracking-wider">Visible Frames</h3>
               <div class="flex gap-1">
-                <button @click="showAllFrames" class="px-2 py-1 text-xs bg-blue-500 hover:bg-blue-600 text-white rounded transition-colors">All</button>
+                <button @click="showAllFrames" class="px-2 py-1 text-[10px] font-medium bg-blue-50 text-blue-600 hover:bg-blue-100 dark:bg-blue-900/30 dark:text-blue-300 dark:hover:bg-blue-900/50 rounded transition-colors">All</button>
-                <button @click="hideAllFrames" class="px-2 py-1 text-xs bg-gray-500 hover:bg-gray-600 text-white rounded transition-colors">None</button>
+                <button @click="hideAllFrames" class="px-2 py-1 text-[10px] font-medium bg-gray-100 text-gray-600 hover:bg-gray-200 dark:bg-gray-700 dark:text-gray-400 dark:hover:bg-gray-600 rounded transition-colors">None</button>
               </div>
             </div>
-            <div class="rounded-md border border-gray-300 dark:border-gray-600 dark:bg-gray-800">
+            <div class="bg-gray-50 dark:bg-gray-900/50 rounded-lg border border-gray-200 dark:border-gray-700 p-2">
-              <div class="max-h-[180px] overflow-y-auto">
+              <div class="max-h-[150px] overflow-y-auto pr-1 custom-scrollbar">
-                <div class="space-y-0.5 p-1">
+                <div class="space-y-1">
-                  <div v-for="(sprite, index) in props.sprites" :key="sprite.id" class="flex items-center gap-2 px-2 py-1.5 hover:bg-gray-50 dark:hover:bg-gray-700 cursor-pointer rounded" @click="toggleHiddenFrame(index)">
+                  <div v-for="(sprite, index) in compositeFrames" :key="sprite.id" class="flex items-center gap-3 px-2 py-1.5 hover:bg-white dark:hover:bg-gray-700 cursor-pointer rounded-md transition-colors group" @click="toggleHiddenFrame(index)">
-                    <input type="checkbox" :checked="!hiddenFrames.includes(index)" class="w-3.5 h-3.5 text-blue-500 focus:ring-blue-400 rounded border-gray-300 dark:border-gray-600 dark:bg-gray-700" @click.stop @change="toggleHiddenFrame(index)" />
+                    <input
-                    <div class="w-8 h-8 bg-gray-100 dark:bg-gray-700 rounded flex items-center justify-center overflow-hidden flex-shrink-0">
+                      type="checkbox"
-                      <img :src="sprite.img.src" class="max-w-full max-h-full object-contain" :style="settingsStore.pixelPerfect ? { 'image-rendering': 'pixelated' } : {}" />
+                      :checked="!hiddenFrames.includes(index)"
+                      class="w-4 h-4 text-blue-600 rounded border-gray-300 focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600"
+                      @click.stop
+                      @change="toggleHiddenFrame(index)"
+                    />
+                    <div class="w-8 h-8 bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-600 rounded flex items-center justify-center overflow-hidden flex-shrink-0 shadow-sm">
+                      <img :src="sprite.url" class="max-w-full max-h-full object-contain" :style="settingsStore.pixelPerfect ? { 'image-rendering': 'pixelated' } : {}" />
                     </div>
-                    <span class="text-xs dark:text-gray-200">{{ index + 1 }}</span>
+                    <span class="text-xs font-mono text-gray-600 dark:text-gray-300 group-hover:text-gray-900 dark:group-hover:text-gray-100">Frame {{ index + 1 }}</span>
                   </div>
                 </div>
               </div>
@@ -159,196 +230,152 @@
 <script setup lang="ts">
   import { ref, onMounted, watch, onUnmounted, computed } from 'vue';
   import { useSettingsStore } from '@/stores/useSettingsStore';
-
+  import type { Layer, Sprite } from '@/types/sprites';
-  interface Sprite {
+  import { getMaxDimensionsAcrossLayers } from '@/composables/useLayers';
-    id: string;
+  import { useZoom } from '@/composables/useZoom';
-    img: HTMLImageElement;
+  import { useAnimationFrames } from '@/composables/useAnimationFrames';
-    width: number;
+  import { calculateNegativeSpacing } from '@/composables/useNegativeSpacing';
-    height: number;
-    x: number;
-    y: number;
-  }
 
   const props = defineProps<{
-    sprites: Sprite[];
+    layers: Layer[];
+    activeLayerId: string;
     columns: number;
   }>();
 
   const emit = defineEmits<{
     (e: 'updateSprite', id: string, x: number, y: number): void;
+    (e: 'updateSpriteInLayer', layerId: string, spriteId: string, x: number, y: number): void;
   }>();
 
-  const previewCanvasRef = ref<HTMLCanvasElement | null>(null);
+  const previewContainerRef = ref<HTMLDivElement | null>(null);
-  const ctx = ref<CanvasRenderingContext2D | null>(null);
-
-  // Preview state
-  const currentFrameIndex = ref(0);
-  const isPlaying = ref(false);
-  const fps = ref(12);
-  const zoom = ref(1);
-  const isDraggable = ref(false);
-  const showAllSprites = ref(false);
-  const animationFrameId = ref<number | null>(null);
-  const lastFrameTime = ref(0);
-
-  // Dragging state
-  const isDragging = ref(false);
-  const activeSpriteId = ref<string | null>(null);
-  const dragStartX = ref(0);
-  const dragStartY = ref(0);
-  const spritePosBeforeDrag = ref({ x: 0, y: 0 });
-
-  // Add this after other refs
-  const hiddenFrames = ref<number[]>([]);
 
   // Get settings from store
   const settingsStore = useSettingsStore();
 
-  // Add these computed properties
+  const {
-  const visibleFrames = computed(() => props.sprites.filter((_, index) => !hiddenFrames.value.includes(index)));
+    zoom,
-  const visibleFramesCount = computed(() => visibleFrames.value.length);
+    increase: increaseZoom,
-  const visibleFrameIndex = computed(() => {
+    decrease: decreaseZoom,
-    return visibleFrames.value.findIndex((_, idx) => idx === visibleFrames.value.findIndex(s => s === props.sprites[currentFrameIndex.value]));
+  } = useZoom({
-  });
+    allowedValues: [0.5, 1, 2, 3, 4, 5],
-  const visibleFrameNumber = computed(() => visibleFrameIndex.value + 1);
+    initial: 1,
-
-  // Canvas drawing
-  const calculateMaxDimensions = () => {
-    let maxWidth = 0;
-    let maxHeight = 0;
-
-    props.sprites.forEach(sprite => {
-      maxWidth = Math.max(maxWidth, sprite.width);
-      maxHeight = Math.max(maxHeight, sprite.height);
   });
 
-    return { maxWidth, maxHeight };
+  const getVisibleLayers = () => props.layers.filter(l => l.visible);
-  };
+  const maxFrames = () => Math.max(0, ...getVisibleLayers().map(l => l.sprites.length));
 
-  const drawPreviewCanvas = () => {
+  const { currentFrameIndex, isPlaying, fps, hiddenFrames, visibleFrames, visibleFramesCount, visibleFrameIndex, visibleFrameNumber, togglePlayback, nextFrame, previousFrame, handleSliderInput, toggleHiddenFrame, showAllFrames, hideAllFrames, stopAnimation } = useAnimationFrames({
-    if (!previewCanvasRef.value || !ctx.value || props.sprites.length === 0) return;
+    sprites: () => {
-
+      const len = maxFrames();
-    const currentSprite = props.sprites[currentFrameIndex.value];
+      const frames: Sprite[] = [];
-    if (!currentSprite) return;
+      for (let i = 0; i < len; i++) {
-
+        const s = getVisibleLayers().find(l => l.sprites[i])?.sprites[i];
-    const { maxWidth, maxHeight } = calculateMaxDimensions();
+        if (s) frames.push(s);
-
-    // Apply pixel art optimization consistently from store
-    ctx.value.imageSmoothingEnabled = !settingsStore.pixelPerfect;
-
-    // Set canvas size to just fit one sprite cell
-    previewCanvasRef.value.width = maxWidth;
-    previewCanvasRef.value.height = maxHeight;
-
-    // Clear canvas
-    ctx.value.clearRect(0, 0, previewCanvasRef.value.width, previewCanvasRef.value.height);
-
-    // Draw grid background (cell)
-    ctx.value.fillStyle = '#f9fafb';
-    ctx.value.fillRect(0, 0, maxWidth, maxHeight);
-
-    // Keep pixel art optimization consistent throughout all drawing operations
-    ctx.value.imageSmoothingEnabled = !settingsStore.pixelPerfect;
-
-    // Draw all sprites with transparency if enabled
-    if (showAllSprites.value && props.sprites.length > 1) {
-      ctx.value.globalAlpha = 0.3;
-      props.sprites.forEach((sprite, index) => {
-        if (index !== currentFrameIndex.value && !hiddenFrames.value.includes(index)) {
-          // Use Math.floor for pixel-perfect positioning
-          ctx.value?.drawImage(sprite.img, Math.floor(sprite.x), Math.floor(sprite.y));
       }
+      return frames;
+    },
+    onDraw: () => {}, // No longer needed for canvas drawing
   });
-      ctx.value.globalAlpha = 1.0;
+
+  // Preview state
+  const isDraggable = ref(false);
+  const repositionAllLayers = ref(false);
+  const showAllSprites = ref(false);
+
+  const compositeFrames = computed<Sprite[]>(() => {
+    // Show frames from the active layer for the thumbnail list
+    const activeLayer = props.layers.find(l => l.id === props.activeLayerId);
+    if (!activeLayer) {
+      // Fallback to first visible layer if no active layer
+      const v = getVisibleLayers();
+      const len = maxFrames();
+      const arr: Sprite[] = [];
+      for (let i = 0; i < len; i++) {
+        const s = v.find(l => l.sprites[i])?.sprites[i];
+        if (s) arr.push(s);
+      }
+      return arr;
+    }
+    return activeLayer.sprites;
+  });
+
+  const currentFrameSprite = computed<Sprite | null>(() => {
+    const layer = props.layers.find(l => l.id === props.activeLayerId);
+    if (!layer) return null;
+    return layer.sprites[currentFrameIndex.value] || null;
+  });
+
+  // Computed cell dimensions
+  const cellDimensions = computed(() => {
+    const visibleLayers = getVisibleLayers();
+    // If manual cell size is enabled, use manual values
+    if (settingsStore.manualCellSizeEnabled) {
+      return {
+        cellWidth: settingsStore.manualCellWidth,
+        cellHeight: settingsStore.manualCellHeight,
+        negativeSpacing: 0,
+      };
     }
 
-    // Draw current sprite with integer positions for pixel-perfect rendering
+    // Otherwise, calculate from sprite dimensions
-    ctx.value.drawImage(currentSprite.img, Math.floor(currentSprite.x), Math.floor(currentSprite.y));
+    const { maxWidth, maxHeight } = getMaxDimensionsAcrossLayers(visibleLayers);
-
+    const allSprites = visibleLayers.flatMap(l => l.sprites);
-    // Draw cell border
+    const negativeSpacing = calculateNegativeSpacing(allSprites, settingsStore.negativeSpacingEnabled);
-    ctx.value.strokeStyle = '#e5e7eb';
+    return {
-    ctx.value.lineWidth = 1;
+      cellWidth: maxWidth + negativeSpacing,
-    ctx.value.strokeRect(0, 0, maxWidth, maxHeight);
+      cellHeight: maxHeight + negativeSpacing,
+      negativeSpacing,
     };
+  });
 
-  // Animation control
+  // Helper for background image (dark mode friendly)
-  const togglePlayback = () => {
+  const getPreviewBackgroundImage = () => {
-    isPlaying.value = !isPlaying.value;
+    if (settingsStore.backgroundColor === 'transparent' && settingsStore.checkerboardEnabled) {
-
+      const color = settingsStore.darkMode ? '#4b5563' : '#d1d5db';
-    if (isPlaying.value) {
+      return `linear-gradient(45deg, ${color} 25%, transparent 25%), linear-gradient(-45deg, ${color} 25%, transparent 25%), linear-gradient(45deg, transparent 75%, ${color} 75%), linear-gradient(-45deg, transparent 75%, ${color} 75%)`;
-      startAnimation();
-    } else {
-      stopAnimation();
     }
+    return 'none';
   };
 
-  const startAnimation = () => {
+  // Dragging state
-    lastFrameTime.value = performance.now();
+  const isDragging = ref(false);
-    animateFrame();
+  const activeSpriteId = ref<string | null>(null);
-  };
+  const activeLayerId = ref<string | null>(null);
-
+  const dragStartX = ref(0);
-  const stopAnimation = () => {
+  const dragStartY = ref(0);
-    if (animationFrameId.value !== null) {
+  const spritePosBeforeDrag = ref({ x: 0, y: 0 });
-      cancelAnimationFrame(animationFrameId.value);
+  const allSpritesPosBeforeDrag = ref<Map<string, { x: number; y: number }>>(new Map());
-      animationFrameId.value = null;
-    }
-  };
-
-  const animateFrame = () => {
-    const now = performance.now();
-    const elapsed = now - lastFrameTime.value;
-    const frameTime = 1000 / fps.value;
-
-    if (elapsed >= frameTime) {
-      lastFrameTime.value = now - (elapsed % frameTime);
-      nextFrame();
-    }
-
-    animationFrameId.value = requestAnimationFrame(animateFrame);
-  };
-
-  const nextFrame = () => {
-    if (visibleFrames.value.length === 0) return;
-
-    const currentVisibleIndex = visibleFrameIndex.value;
-    const nextVisibleIndex = (currentVisibleIndex + 1) % visibleFrames.value.length;
-    currentFrameIndex.value = props.sprites.indexOf(visibleFrames.value[nextVisibleIndex]);
-    drawPreviewCanvas();
-  };
-
-  const previousFrame = () => {
-    if (visibleFrames.value.length === 0) return;
-
-    const currentVisibleIndex = visibleFrameIndex.value;
-    const prevVisibleIndex = (currentVisibleIndex - 1 + visibleFrames.value.length) % visibleFrames.value.length;
-    currentFrameIndex.value = props.sprites.indexOf(visibleFrames.value[prevVisibleIndex]);
-    drawPreviewCanvas();
-  };
-
-  // Add this method to handle slider input
-  const handleSliderInput = (event: Event) => {
-    const target = event.target as HTMLInputElement;
-    const index = parseInt(target.value);
-    currentFrameIndex.value = props.sprites.indexOf(visibleFrames.value[index]);
-  };
 
   // Drag functionality
-  const startDrag = (event: MouseEvent) => {
+  const startDrag = (event: MouseEvent, sprite: Sprite, layerId: string) => {
-    if (!isDraggable.value || !previewCanvasRef.value) return;
+    if (!isDraggable.value || !previewContainerRef.value) return;
 
-    const rect = previewCanvasRef.value.getBoundingClientRect();
+    const rect = previewContainerRef.value.getBoundingClientRect();
-    const scaleX = previewCanvasRef.value.width / (rect.width / zoom.value);
+    const scaleX = previewContainerRef.value.offsetWidth / (rect.width / zoom.value);
-    const scaleY = previewCanvasRef.value.height / (rect.height / zoom.value);
+    const scaleY = previewContainerRef.value.offsetHeight / (rect.height / zoom.value);
 
     const mouseX = ((event.clientX - rect.left) / zoom.value) * scaleX;
     const mouseY = ((event.clientY - rect.top) / zoom.value) * scaleY;
 
-    const sprite = props.sprites[currentFrameIndex.value];
+    if (repositionAllLayers.value) {
+      isDragging.value = true;
+      activeSpriteId.value = 'ALL_LAYERS'; // Special marker for all layers
+      dragStartX.value = mouseX;
+      dragStartY.value = mouseY;
 
-    // Check if click is on sprite
+      // Store initial positions for all sprites in this frame from all visible layers
-    if (sprite && mouseX >= sprite.x && mouseX <= sprite.x + sprite.width && mouseY >= sprite.y && mouseY <= sprite.y + sprite.height) {
+      allSpritesPosBeforeDrag.value.clear();
+      const visibleLayers = getVisibleLayers();
+      visibleLayers.forEach(layer => {
+        const s = layer.sprites[currentFrameIndex.value];
+        if (s) {
+          allSpritesPosBeforeDrag.value.set(s.id, { x: s.x, y: s.y });
+        }
+      });
+    } else {
       isDragging.value = true;
       activeSpriteId.value = sprite.id;
+      activeLayerId.value = layerId;
       dragStartX.value = mouseX;
       dragStartY.value = mouseY;
       spritePosBeforeDrag.value = { x: sprite.x, y: sprite.y };
@@ -356,11 +383,11 @@
   };
 
   const drag = (event: MouseEvent) => {
-    if (!isDragging.value || !activeSpriteId.value || !previewCanvasRef.value) return;
+    if (!isDragging.value || !activeSpriteId.value || !previewContainerRef.value) return;
 
-    const rect = previewCanvasRef.value.getBoundingClientRect();
+    const rect = previewContainerRef.value.getBoundingClientRect();
-    const scaleX = previewCanvasRef.value.width / (rect.width / zoom.value);
+    const scaleX = previewContainerRef.value.offsetWidth / (rect.width / zoom.value);
-    const scaleY = previewCanvasRef.value.height / (rect.height / zoom.value);
+    const scaleY = previewContainerRef.value.offsetHeight / (rect.height / zoom.value);
 
     const mouseX = ((event.clientX - rect.left) / zoom.value) * scaleX;
     const mouseY = ((event.clientY - rect.top) / zoom.value) * scaleY;
@@ -368,46 +395,52 @@
     const deltaX = Math.round(mouseX - dragStartX.value);
     const deltaY = Math.round(mouseY - dragStartY.value);
 
-    const sprite = props.sprites[currentFrameIndex.value];
+    const { cellWidth, cellHeight, negativeSpacing } = cellDimensions.value;
-    if (!sprite || sprite.id !== activeSpriteId.value) return;
 
-    const { maxWidth, maxHeight } = calculateMaxDimensions();
+    if (activeSpriteId.value === 'ALL_LAYERS') {
+      // Move all sprites in current frame from all visible layers
+      const visibleLayers = getVisibleLayers();
+      visibleLayers.forEach(layer => {
+        const sprite = layer.sprites[currentFrameIndex.value];
+        if (!sprite) return;
+
+        const originalPos = allSpritesPosBeforeDrag.value.get(sprite.id);
+        if (!originalPos) return;
+
+        // Calculate new position with constraints
+        let newX = Math.round(originalPos.x + deltaX);
+        let newY = Math.round(originalPos.y + deltaY);
+
+        // Constrain movement within expanded cell
+        newX = Math.max(-negativeSpacing, Math.min(cellWidth - negativeSpacing - sprite.width, newX));
+        newY = Math.max(-negativeSpacing, Math.min(cellHeight - negativeSpacing - sprite.height, newY));
+
+        emit('updateSpriteInLayer', layer.id, sprite.id, newX, newY);
+      });
+    } else {
+      // Move only the active layer sprite
+      const activeSprite = props.layers.find(l => l.id === activeLayerId.value)?.sprites[currentFrameIndex.value];
+      if (!activeSprite || activeSprite.id !== activeSpriteId.value) return;
 
       // Calculate new position with constraints and round to integers
       let newX = Math.round(spritePosBeforeDrag.value.x + deltaX);
       let newY = Math.round(spritePosBeforeDrag.value.y + deltaY);
 
-    // Constrain movement within cell
+      // Constrain movement within expanded cell (allow negative values up to -negativeSpacing)
-    newX = Math.max(0, Math.min(maxWidth - sprite.width, newX));
+      newX = Math.max(-negativeSpacing, Math.min(cellWidth - negativeSpacing - activeSprite.width, newX));
-    newY = Math.max(0, Math.min(maxHeight - sprite.height, newY));
+      newY = Math.max(-negativeSpacing, Math.min(cellHeight - negativeSpacing - activeSprite.height, newY));
 
       emit('updateSprite', activeSpriteId.value, newX, newY);
-    drawPreviewCanvas();
+    }
   };
 
   const stopDrag = () => {
     isDragging.value = false;
     activeSpriteId.value = null;
+    activeLayerId.value = null;
   };
 
-  // Add helper methods for mobile zoom controls
+  const handleTouchStart = (event: TouchEvent, sprite: Sprite, layerId: string) => {
-  const increaseZoom = () => {
-    const zoomValues = [0.5, 1, 2, 3, 4];
-    const currentIndex = zoomValues.indexOf(Number(zoom.value));
-    if (currentIndex < zoomValues.length - 1) {
-      zoom.value = zoomValues[currentIndex + 1];
-    }
-  };
-
-  const decreaseZoom = () => {
-    const zoomValues = [0.5, 1, 2, 3, 4];
-    const currentIndex = zoomValues.indexOf(Number(zoom.value));
-    if (currentIndex > 0) {
-      zoom.value = zoomValues[currentIndex - 1];
-    }
-  };
-
-  const handleTouchStart = (event: TouchEvent) => {
     if (!isDraggable.value) return;
 
     if (event.touches.length === 1) {
@@ -416,7 +449,7 @@
         clientX: touch.clientX,
         clientY: touch.clientY,
       });
-      startDrag(mouseEvent);
+      startDrag(mouseEvent, sprite, layerId);
     }
   };
 
@@ -439,84 +472,25 @@
 
   // Lifecycle hooks
   onMounted(() => {
-    if (previewCanvasRef.value) {
+    // No longer need to initialize canvas or draw
-      ctx.value = previewCanvasRef.value.getContext('2d');
-      drawPreviewCanvas();
-    }
-
-    // Listen for forceRedraw event from App.vue
-    window.addEventListener('forceRedraw', handleForceRedraw);
   });
 
   onUnmounted(() => {
     stopAnimation();
-    window.removeEventListener('forceRedraw', handleForceRedraw);
   });
 
-  // Handler for force redraw event
+  // Watchers - most canvas-related watchers removed
-  const handleForceRedraw = () => {
+  // Keep layer watchers to ensure reactivity
-    // Ensure we're using integer positions for pixel-perfect rendering
+  watch(
-    props.sprites.forEach(sprite => {
+    () => props.layers,
-      sprite.x = Math.floor(sprite.x);
+    () => {},
-      sprite.y = Math.floor(sprite.y);
+    { deep: true }
-    });
+  );
-
+  watch(
-    // Force a redraw with the correct image smoothing settings
+    () => props.activeLayerId,
-    if (ctx.value) {
+    () => {}
-      ctx.value.imageSmoothingEnabled = !settingsStore.pixelPerfect;
+  );
-      drawPreviewCanvas();
+  watch(currentFrameIndex, () => {});
-    }
-  };
-
-  // Watchers
-  watch(() => props.sprites, drawPreviewCanvas, { deep: true });
-  watch(currentFrameIndex, drawPreviewCanvas);
-  watch(zoom, drawPreviewCanvas);
-  watch(isDraggable, drawPreviewCanvas);
-  watch(showAllSprites, drawPreviewCanvas);
-  watch(hiddenFrames, drawPreviewCanvas);
-  watch(() => settingsStore.pixelPerfect, drawPreviewCanvas);
-
-  // Initial draw
-  if (props.sprites.length > 0) {
-    drawPreviewCanvas();
-  }
-
-  const toggleHiddenFrame = (index: number) => {
-    const currentIndex = hiddenFrames.value.indexOf(index);
-    if (currentIndex === -1) {
-      // Adding to hidden frames
-      hiddenFrames.value.push(index);
-
-      // If we're hiding the current frame, switch to the next visible frame
-      if (index === currentFrameIndex.value) {
-        const nextVisibleSprite = props.sprites.findIndex((_, i) => i !== index && !hiddenFrames.value.includes(i));
-        if (nextVisibleSprite !== -1) {
-          currentFrameIndex.value = nextVisibleSprite;
-        }
-      }
-    } else {
-      // Removing from hidden frames
-      hiddenFrames.value.splice(currentIndex, 1);
-    }
-
-    // Force a redraw
-    drawPreviewCanvas();
-  };
-
-  const showAllFrames = () => {
-    hiddenFrames.value = [];
-    drawPreviewCanvas();
-  };
-
-  const hideAllFrames = () => {
-    hiddenFrames.value = props.sprites.map((_, index) => index);
-    // Keep at least one frame visible
-    if (hiddenFrames.value.length > 0) {
-      hiddenFrames.value.splice(currentFrameIndex.value, 1);
-    }
-    drawPreviewCanvas();
-  };
 </script>
 
 <style scoped>

src/components/SpritesheetSplitter.vue

@@ -96,6 +96,7 @@
   import { ref, watch, onUnmounted } from 'vue';
   import Modal from './utilities/Modal.vue';
   import { useSettingsStore } from '@/stores/useSettingsStore';
+  import type { SpriteFile } from '@/types/sprites';
 
   interface SpritePreview {
     url: string;
@@ -117,14 +118,6 @@
     (e: 'split', sprites: SpriteFile[]): void; // Change from File[] to SpriteFile[]
   }>();
 
-  interface SpriteFile {
-    file: File;
-    x: number;
-    y: number;
-    width: number;
-    height: number;
-  }
-
   // Get settings from store
   const settingsStore = useSettingsStore();
 

src/components/utilities/DarkModeToggle.vue

@@ -1,7 +1,5 @@
 <template>
-  <button @click="settingsStore.toggleDarkMode()" class="p-2 rounded-lg transition-colors" :class="settingsStore.darkMode ? 'text-yellow-400 hover:bg-gray-700' : 'text-gray-700 hover:bg-gray-100'" aria-label="Toggle dark mode" data-rybbit-event="toggle-dark-mode">
+  <button @click="settingsStore.toggleDarkMode()" class="btn btn-secondary mr-1" aria-label="Toggle dark mode" data-rybbit-event="toggle-dark-mode"><i :class="settingsStore.darkMode ? 'fas fa-sun' : 'fas fa-moon'"></i> Theme</button>
-    <i :class="settingsStore.darkMode ? 'fas fa-sun' : 'fas fa-moon'"></i>
-  </button>
 </template>
 
 <script setup lang="ts">

src/composables/useAnimationFrames.ts

@@ -0,0 +1,178 @@
+import { ref, computed, type Ref, onUnmounted, toRef, isRef } from 'vue';
+import type { Sprite } from '@/types/sprites';
+
+export interface AnimationFramesOptions {
+  sprites: Ref<Sprite[]> | Sprite[] | (() => Sprite[]);
+  onDraw: () => void;
+}
+
+export function useAnimationFrames(options: AnimationFramesOptions) {
+  const { onDraw } = options;
+
+  // Convert sprites to a computed ref for reactivity
+  const spritesRef = computed(() => {
+    if (typeof options.sprites === 'function') {
+      return options.sprites();
+    }
+    if (isRef(options.sprites)) {
+      return options.sprites.value;
+    }
+    return options.sprites;
+  });
+
+  // Helper to get sprites array
+  const getSprites = () => spritesRef.value;
+
+  // State
+  const currentFrameIndex = ref(0);
+  const isPlaying = ref(false);
+  const fps = ref(12);
+  const hiddenFrames = ref<number[]>([]);
+
+  // Animation internals
+  const animationFrameId = ref<number | null>(null);
+  const lastFrameTime = ref(0);
+
+  // Computed properties for visible frames
+  const visibleFrames = computed(() => getSprites().filter((_, index) => !hiddenFrames.value.includes(index)));
+
+  const visibleFramesCount = computed(() => visibleFrames.value.length);
+
+  const visibleFrameIndex = computed(() => {
+    const sprites = getSprites();
+    const currentSprite = sprites[currentFrameIndex.value];
+    return visibleFrames.value.findIndex(s => s === currentSprite);
+  });
+
+  const visibleFrameNumber = computed(() => visibleFrameIndex.value + 1);
+
+  // Animation control
+  const animateFrame = () => {
+    const now = performance.now();
+    const elapsed = now - lastFrameTime.value;
+    const frameTime = 1000 / fps.value;
+
+    if (elapsed >= frameTime) {
+      lastFrameTime.value = now - (elapsed % frameTime);
+      nextFrame();
+    }
+
+    animationFrameId.value = requestAnimationFrame(animateFrame);
+  };
+
+  const startAnimation = () => {
+    lastFrameTime.value = performance.now();
+    animateFrame();
+  };
+
+  const stopAnimation = () => {
+    if (animationFrameId.value !== null) {
+      cancelAnimationFrame(animationFrameId.value);
+      animationFrameId.value = null;
+    }
+  };
+
+  const togglePlayback = () => {
+    isPlaying.value = !isPlaying.value;
+
+    if (isPlaying.value) {
+      startAnimation();
+    } else {
+      stopAnimation();
+    }
+  };
+
+  const nextFrame = () => {
+    if (visibleFrames.value.length === 0) return;
+    const sprites = getSprites();
+
+    const currentVisibleIndex = visibleFrameIndex.value;
+    const nextVisibleIndex = (currentVisibleIndex + 1) % visibleFrames.value.length;
+    currentFrameIndex.value = sprites.indexOf(visibleFrames.value[nextVisibleIndex]);
+    onDraw();
+  };
+
+  const previousFrame = () => {
+    if (visibleFrames.value.length === 0) return;
+    const sprites = getSprites();
+
+    const currentVisibleIndex = visibleFrameIndex.value;
+    const prevVisibleIndex = (currentVisibleIndex - 1 + visibleFrames.value.length) % visibleFrames.value.length;
+    currentFrameIndex.value = sprites.indexOf(visibleFrames.value[prevVisibleIndex]);
+    onDraw();
+  };
+
+  const handleSliderInput = (event: Event) => {
+    const sprites = getSprites();
+    const target = event.target as HTMLInputElement;
+    const index = parseInt(target.value);
+    currentFrameIndex.value = sprites.indexOf(visibleFrames.value[index]);
+  };
+
+  // Frame visibility management
+  const toggleHiddenFrame = (index: number) => {
+    const sprites = getSprites();
+    const currentIndex = hiddenFrames.value.indexOf(index);
+
+    if (currentIndex === -1) {
+      hiddenFrames.value.push(index);
+
+      // If hiding current frame, switch to next visible
+      if (index === currentFrameIndex.value) {
+        const nextVisible = sprites.findIndex((_, i) => i !== index && !hiddenFrames.value.includes(i));
+        if (nextVisible !== -1) {
+          currentFrameIndex.value = nextVisible;
+        }
+      }
+    } else {
+      hiddenFrames.value.splice(currentIndex, 1);
+    }
+
+    onDraw();
+  };
+
+  const showAllFrames = () => {
+    hiddenFrames.value = [];
+    onDraw();
+  };
+
+  const hideAllFrames = () => {
+    const sprites = getSprites();
+    hiddenFrames.value = sprites.map((_, index) => index);
+
+    // Keep at least one frame visible
+    if (hiddenFrames.value.length > 0) {
+      hiddenFrames.value.splice(currentFrameIndex.value, 1);
+    }
+    onDraw();
+  };
+
+  // Cleanup on unmount
+  onUnmounted(() => {
+    stopAnimation();
+  });
+
+  return {
+    // State
+    currentFrameIndex,
+    isPlaying,
+    fps,
+    hiddenFrames,
+
+    // Computed
+    visibleFrames,
+    visibleFramesCount,
+    visibleFrameIndex,
+    visibleFrameNumber,
+
+    // Methods
+    togglePlayback,
+    nextFrame,
+    previousFrame,
+    handleSliderInput,
+    toggleHiddenFrame,
+    showAllFrames,
+    hideAllFrames,
+    stopAnimation,
+  };
+}

src/composables/useBlog.ts

@@ -0,0 +1,48 @@
+import matter from 'gray-matter';
+
+export interface BlogPost {
+  slug: string;
+  title: string;
+  date: string;
+  description: string;
+  image: string;
+  content: string;
+  keywords?: string;
+  author?: string;
+}
+
+export function useBlog() {
+  const getPosts = async (): Promise<BlogPost[]> => {
+    const modules = import.meta.glob('../blog/*.md', { query: '?raw', import: 'default' });
+    const posts: BlogPost[] = [];
+
+    for (const path in modules) {
+      const content = (await modules[path]()) as string;
+      const { data, content: markdownContent } = matter(content);
+      const slug = path.split('/').pop()?.replace('.md', '') || '';
+
+      posts.push({
+        slug,
+        title: data.title,
+        date: data.date,
+        description: data.description,
+        image: data.image,
+        content: markdownContent,
+        keywords: data.keywords,
+        author: data.author,
+      });
+    }
+
+    return posts.sort((a, b) => new Date(b.date).getTime() - new Date(a.date).getTime());
+  };
+
+  const getPost = async (slug: string): Promise<BlogPost | undefined> => {
+    const posts = await getPosts();
+    return posts.find(post => post.slug === slug);
+  };
+
+  return {
+    getPosts,
+    getPost,
+  };
+}

src/composables/useCanvas2D.ts

@@ -0,0 +1,151 @@
+import { ref, type Ref } from 'vue';
+import { useSettingsStore } from '@/stores/useSettingsStore';
+import type { Sprite } from '@/types/sprites';
+
+export interface Canvas2DOptions {
+  pixelPerfect?: Ref<boolean> | boolean;
+}
+
+export function useCanvas2D(canvasRef: Ref<HTMLCanvasElement | null>, options?: Canvas2DOptions) {
+  const ctx = ref<CanvasRenderingContext2D | null>(null);
+  const settingsStore = useSettingsStore();
+
+  const initContext = () => {
+    if (canvasRef.value) {
+      ctx.value = canvasRef.value.getContext('2d');
+      applySmoothing();
+    }
+    return ctx.value;
+  };
+
+  const applySmoothing = () => {
+    if (ctx.value) {
+      const pixelPerfect = options?.pixelPerfect;
+      const isPixelPerfect = typeof pixelPerfect === 'boolean' ? pixelPerfect : (pixelPerfect?.value ?? settingsStore.pixelPerfect);
+      ctx.value.imageSmoothingEnabled = !isPixelPerfect;
+    }
+  };
+
+  const clear = () => {
+    if (!canvasRef.value || !ctx.value) return;
+    ctx.value.clearRect(0, 0, canvasRef.value.width, canvasRef.value.height);
+  };
+
+  const setCanvasSize = (width: number, height: number) => {
+    if (canvasRef.value) {
+      canvasRef.value.width = width;
+      canvasRef.value.height = height;
+    }
+  };
+
+  const fillRect = (x: number, y: number, width: number, height: number, color: string) => {
+    if (!ctx.value) return;
+    ctx.value.fillStyle = color;
+    ctx.value.fillRect(Math.floor(x), Math.floor(y), width, height);
+  };
+
+  const strokeRect = (x: number, y: number, width: number, height: number, color: string, lineWidth = 1) => {
+    if (!ctx.value) return;
+    ctx.value.strokeStyle = color;
+    ctx.value.lineWidth = lineWidth;
+    ctx.value.strokeRect(Math.floor(x), Math.floor(y), width, height);
+  };
+
+  const drawImage = (img: HTMLImageElement | HTMLCanvasElement, x: number, y: number, alpha = 1) => {
+    if (!ctx.value) return;
+    const prevAlpha = ctx.value.globalAlpha;
+    ctx.value.globalAlpha = alpha;
+    ctx.value.drawImage(img, Math.floor(x), Math.floor(y));
+    ctx.value.globalAlpha = prevAlpha;
+  };
+
+  const setGlobalAlpha = (alpha: number) => {
+    if (ctx.value) {
+      ctx.value.globalAlpha = alpha;
+    }
+  };
+
+  const resetGlobalAlpha = () => {
+    if (ctx.value) {
+      ctx.value.globalAlpha = 1.0;
+    }
+  };
+
+  // Helper to ensure integer positions for pixel-perfect rendering
+  const ensureIntegerPositions = <T extends { x: number; y: number }>(items: T[]) => {
+    items.forEach(item => {
+      item.x = Math.floor(item.x);
+      item.y = Math.floor(item.y);
+    });
+  };
+
+  // Centralized force redraw handler
+  const createForceRedrawHandler = <T extends { x: number; y: number }>(items: T[], drawCallback: () => void) => {
+    return () => {
+      ensureIntegerPositions(items);
+      applySmoothing();
+      drawCallback();
+    };
+  };
+
+  // Get mouse position relative to canvas, accounting for zoom
+  const getMousePosition = (event: MouseEvent, zoom = 1): { x: number; y: number } | null => {
+    if (!canvasRef.value) return null;
+
+    const rect = canvasRef.value.getBoundingClientRect();
+    const scaleX = canvasRef.value.width / (rect.width / zoom);
+    const scaleY = canvasRef.value.height / (rect.height / zoom);
+
+    return {
+      x: ((event.clientX - rect.left) / zoom) * scaleX,
+      y: ((event.clientY - rect.top) / zoom) * scaleY,
+    };
+  };
+
+  // Helper to attach load/error listeners to images that aren't yet loaded
+  const attachImageListeners = (sprites: Sprite[], onLoad: () => void, tracked: WeakSet<HTMLImageElement>) => {
+    sprites.forEach(sprite => {
+      const img = sprite.img as HTMLImageElement | undefined;
+      if (img && !tracked.has(img)) {
+        tracked.add(img);
+        if (!img.complete) {
+          img.addEventListener('load', onLoad, { once: true });
+          img.addEventListener('error', onLoad, { once: true });
+        }
+      }
+    });
+  };
+
+  // Fill cell background with selected color or transparent
+  const fillCellBackground = (x: number, y: number, width: number, height: number) => {
+    if (settingsStore.backgroundColor === 'transparent') return;
+    const color = settingsStore.backgroundColor === 'custom' ? settingsStore.backgroundColor : settingsStore.backgroundColor;
+    fillRect(x, y, width, height, color);
+  };
+
+  // Stroke grid with theme-aware color
+  const strokeGridCell = (x: number, y: number, width: number, height: number) => {
+    const color = settingsStore.darkMode ? '#4B5563' : '#e5e7eb';
+    strokeRect(x, y, width, height, color, 1);
+  };
+
+  return {
+    ctx,
+    canvasRef,
+    initContext,
+    applySmoothing,
+    clear,
+    setCanvasSize,
+    fillRect,
+    strokeRect,
+    drawImage,
+    setGlobalAlpha,
+    resetGlobalAlpha,
+    ensureIntegerPositions,
+    createForceRedrawHandler,
+    getMousePosition,
+    attachImageListeners,
+    fillCellBackground,
+    strokeGridCell,
+  };
+}

src/composables/useDragSprite.ts

@@ -0,0 +1,323 @@
+import { ref, computed, type Ref, type ComputedRef } from 'vue';
+import type { Sprite, Layer } from '@/types/sprites';
+import { getMaxDimensions } from './useSprites';
+import { calculateNegativeSpacing } from './useNegativeSpacing';
+
+export interface CellPosition {
+  col: number;
+  row: number;
+  index: number;
+}
+
+export interface SpritePosition {
+  id: string;
+  canvasX: number;
+  canvasY: number;
+  cellX: number;
+  cellY: number;
+  width: number;
+  height: number;
+  maxWidth: number;
+  maxHeight: number;
+  col: number;
+  row: number;
+  index: number;
+  x: number;
+  y: number;
+}
+
+export interface DragSpriteOptions {
+  sprites: Ref<Sprite[]> | ComputedRef<Sprite[]> | Sprite[];
+  layers?: Ref<Layer[]> | ComputedRef<Layer[]> | Layer[];
+  columns: Ref<number> | number;
+  zoom?: Ref<number>;
+  allowCellSwap?: Ref<boolean>;
+  negativeSpacingEnabled?: Ref<boolean>;
+  manualCellSizeEnabled?: Ref<boolean>;
+  manualCellWidth?: Ref<number>;
+  manualCellHeight?: Ref<number>;
+  getMousePosition: (event: MouseEvent, zoom?: number) => { x: number; y: number } | null;
+  onUpdateSprite: (id: string, x: number, y: number) => void;
+  onUpdateSpriteCell?: (id: string, newIndex: number) => void;
+  onDraw: () => void;
+}
+
+export function useDragSprite(options: DragSpriteOptions) {
+  const { getMousePosition, onUpdateSprite, onUpdateSpriteCell, onDraw } = options;
+
+  // Helper to get reactive values
+  const getSprites = () => (Array.isArray(options.sprites) ? options.sprites : options.sprites.value);
+  const getLayers = () => (options.layers ? (Array.isArray(options.layers) ? options.layers : options.layers.value) : null);
+  const getColumns = () => (typeof options.columns === 'number' ? options.columns : options.columns.value);
+  const getZoom = () => options.zoom?.value ?? 1;
+  const getAllowCellSwap = () => options.allowCellSwap?.value ?? false;
+  const getNegativeSpacingEnabled = () => options.negativeSpacingEnabled?.value ?? false;
+  const getManualCellSizeEnabled = () => options.manualCellSizeEnabled?.value ?? false;
+  const getManualCellWidth = () => options.manualCellWidth?.value ?? 64;
+  const getManualCellHeight = () => options.manualCellHeight?.value ?? 64;
+
+  // Drag state
+  const isDragging = ref(false);
+  const activeSpriteId = ref<string | null>(null);
+  const activeSpriteCellIndex = ref<number | null>(null);
+  const dragStartX = ref(0);
+  const dragStartY = ref(0);
+  const dragOffsetX = ref(0);
+  const dragOffsetY = ref(0);
+  const currentHoverCell = ref<CellPosition | null>(null);
+
+  // Visual feedback
+  const ghostSprite = ref<{ id: string; x: number; y: number } | null>(null);
+  const highlightCell = ref<CellPosition | null>(null);
+
+  // Cache for max dimensions
+  const lastMaxWidth = ref(1);
+  const lastMaxHeight = ref(1);
+
+  const calculateMaxDimensions = () => {
+    const negativeSpacingEnabled = getNegativeSpacingEnabled();
+    const manualCellSizeEnabled = getManualCellSizeEnabled();
+
+    // If manual cell size is enabled, use manual dimensions
+    if (manualCellSizeEnabled) {
+      const maxWidth = getManualCellWidth();
+      const maxHeight = getManualCellHeight();
+      // When manual cell size is used, negative spacing is not applied
+      const negativeSpacing = 0;
+      // Don't update lastMaxWidth/lastMaxHeight when in manual mode
+      return { maxWidth, maxHeight, negativeSpacing };
+    }
+
+    // Get all sprites to calculate dimensions from
+    // If layers are provided, use all visible layers; otherwise use current sprites
+    const layers = getLayers();
+    const spritesToMeasure = layers ? layers.filter(l => l.visible).flatMap(l => l.sprites) : getSprites();
+
+    // Otherwise, calculate based on sprite dimensions across all visible layers
+    const base = getMaxDimensions(spritesToMeasure);
+    // When switching back from manual mode, reset to actual sprite dimensions
+    const baseMaxWidth = Math.max(1, base.maxWidth);
+    const baseMaxHeight = Math.max(1, base.maxHeight);
+    lastMaxWidth.value = baseMaxWidth;
+    lastMaxHeight.value = baseMaxHeight;
+
+    // Calculate negative spacing using shared composable
+    const negativeSpacing = calculateNegativeSpacing(spritesToMeasure, negativeSpacingEnabled);
+
+    // Add negative spacing to expand each cell
+    const maxWidth = baseMaxWidth + negativeSpacing;
+    const maxHeight = baseMaxHeight + negativeSpacing;
+    return { maxWidth, maxHeight, negativeSpacing };
+  };
+
+  // Computed sprite positions
+  const spritePositions = computed<SpritePosition[]>(() => {
+    const sprites = getSprites();
+    const columns = getColumns();
+    const { maxWidth, maxHeight, negativeSpacing } = calculateMaxDimensions();
+
+    return sprites.map((sprite, index) => {
+      const col = index % columns;
+      const row = Math.floor(index / columns);
+
+      // With negative spacing, sprites are positioned at bottom-right of cell
+      // (spacing added to top and left)
+      return {
+        id: sprite.id,
+        canvasX: col * maxWidth + negativeSpacing + sprite.x,
+        canvasY: row * maxHeight + negativeSpacing + sprite.y,
+        cellX: col * maxWidth,
+        cellY: row * maxHeight,
+        width: sprite.width,
+        height: sprite.height,
+        maxWidth,
+        maxHeight,
+        col,
+        row,
+        index,
+        x: sprite.x,
+        y: sprite.y,
+      };
+    });
+  });
+
+  const findCellAtPosition = (x: number, y: number): CellPosition | null => {
+    const sprites = getSprites();
+    const columns = getColumns();
+    const { maxWidth, maxHeight } = calculateMaxDimensions();
+    const col = Math.floor(x / maxWidth);
+    const row = Math.floor(y / maxHeight);
+
+    const totalRows = Math.ceil(sprites.length / columns);
+    if (col >= 0 && col < columns && row >= 0 && row < totalRows) {
+      const index = row * columns + col;
+      if (index < sprites.length) {
+        return { col, row, index };
+      }
+    }
+    return null;
+  };
+
+  const findSpriteAtPosition = (x: number, y: number): Sprite | null => {
+    const sprites = getSprites();
+    const positions = spritePositions.value;
+
+    for (let i = positions.length - 1; i >= 0; i--) {
+      const pos = positions[i];
+      if (x >= pos.canvasX && x <= pos.canvasX + pos.width && y >= pos.canvasY && y <= pos.canvasY + pos.height) {
+        return sprites.find(s => s.id === pos.id) || null;
+      }
+    }
+    return null;
+  };
+
+  const startDrag = (event: MouseEvent) => {
+    const pos = getMousePosition(event, getZoom());
+    if (!pos) return;
+
+    const clickedSprite = findSpriteAtPosition(pos.x, pos.y);
+    if (clickedSprite) {
+      isDragging.value = true;
+      activeSpriteId.value = clickedSprite.id;
+      dragStartX.value = pos.x;
+      dragStartY.value = pos.y;
+
+      const spritePosition = spritePositions.value.find(p => p.id === clickedSprite.id);
+      if (spritePosition) {
+        dragOffsetX.value = pos.x - spritePosition.canvasX;
+        dragOffsetY.value = pos.y - spritePosition.canvasY;
+        activeSpriteCellIndex.value = spritePosition.index;
+
+        const startCell = findCellAtPosition(pos.x, pos.y);
+        if (startCell) {
+          currentHoverCell.value = startCell;
+          highlightCell.value = null;
+        }
+      }
+    }
+  };
+
+  const handleInCellMovement = (mouseX: number, mouseY: number, spriteIndex: number) => {
+    if (!activeSpriteId.value) return;
+    const sprites = getSprites();
+    const columns = getColumns();
+    const { maxWidth, maxHeight, negativeSpacing } = calculateMaxDimensions();
+
+    // Use the sprite's current index in the array to calculate cell position
+    const cellCol = spriteIndex % columns;
+    const cellRow = Math.floor(spriteIndex / columns);
+    const cellX = cellCol * maxWidth;
+    const cellY = cellRow * maxHeight;
+
+    // Calculate new position relative to cell origin (without the negative spacing offset)
+    // The sprite's x,y is stored relative to where it would be drawn after the negativeSpacing offset
+    const newX = mouseX - cellX - negativeSpacing - dragOffsetX.value;
+    const newY = mouseY - cellY - negativeSpacing - dragOffsetY.value;
+
+    // The sprite can move within the full expanded cell area
+    // Allow negative values up to -negativeSpacing so sprite can fill the expanded area
+    const constrainedX = Math.floor(Math.max(-negativeSpacing, Math.min(maxWidth - negativeSpacing - sprites[spriteIndex].width, newX)));
+    const constrainedY = Math.floor(Math.max(-negativeSpacing, Math.min(maxHeight - negativeSpacing - sprites[spriteIndex].height, newY)));
+
+    onUpdateSprite(activeSpriteId.value, constrainedX, constrainedY);
+    onDraw();
+  };
+
+  const drag = (event: MouseEvent) => {
+    if (!isDragging.value || !activeSpriteId.value || activeSpriteCellIndex.value === null) return;
+
+    const pos = getMousePosition(event, getZoom());
+    if (!pos) return;
+
+    const sprites = getSprites();
+    const spriteIndex = sprites.findIndex(s => s.id === activeSpriteId.value);
+    if (spriteIndex === -1) return;
+
+    const hoverCell = findCellAtPosition(pos.x, pos.y);
+    currentHoverCell.value = hoverCell;
+
+    if (getAllowCellSwap() && hoverCell) {
+      if (hoverCell.index !== activeSpriteCellIndex.value) {
+        highlightCell.value = hoverCell;
+        ghostSprite.value = {
+          id: activeSpriteId.value,
+          x: pos.x - dragOffsetX.value,
+          y: pos.y - dragOffsetY.value,
+        };
+        onDraw();
+      } else {
+        highlightCell.value = null;
+        ghostSprite.value = null;
+        handleInCellMovement(pos.x, pos.y, spriteIndex);
+      }
+    } else {
+      handleInCellMovement(pos.x, pos.y, spriteIndex);
+    }
+  };
+
+  const stopDrag = () => {
+    if (isDragging.value && getAllowCellSwap() && activeSpriteId.value && activeSpriteCellIndex.value !== null && currentHoverCell.value && activeSpriteCellIndex.value !== currentHoverCell.value.index) {
+      if (onUpdateSpriteCell) {
+        onUpdateSpriteCell(activeSpriteId.value, currentHoverCell.value.index);
+      }
+      onUpdateSprite(activeSpriteId.value, 0, 0);
+    }
+
+    isDragging.value = false;
+    activeSpriteId.value = null;
+    activeSpriteCellIndex.value = null;
+    currentHoverCell.value = null;
+    highlightCell.value = null;
+    ghostSprite.value = null;
+
+    onDraw();
+  };
+
+  // Touch event handlers
+  const handleTouchStart = (event: TouchEvent) => {
+    if (event.touches.length === 1) {
+      const touch = event.touches[0];
+      const mouseEvent = {
+        clientX: touch.clientX,
+        clientY: touch.clientY,
+        preventDefault: () => {},
+      } as unknown as MouseEvent;
+      startDrag(mouseEvent);
+    }
+  };
+
+  const handleTouchMove = (event: TouchEvent) => {
+    if (isDragging.value) {
+      event.preventDefault();
+    }
+
+    if (event.touches.length === 1) {
+      const touch = event.touches[0];
+      const mouseEvent = {
+        clientX: touch.clientX,
+        clientY: touch.clientY,
+        preventDefault: () => {},
+      } as unknown as MouseEvent;
+      drag(mouseEvent);
+    }
+  };
+
+  return {
+    // State
+    isDragging,
+    activeSpriteId,
+    ghostSprite,
+    highlightCell,
+    spritePositions,
+
+    // Methods
+    startDrag,
+    drag,
+    stopDrag,
+    handleTouchStart,
+    handleTouchMove,
+    findSpriteAtPosition,
+    findCellAtPosition,
+    calculateMaxDimensions,
+  };
+}

src/composables/useExport.ts

@@ -0,0 +1,251 @@
+import type { Ref } from 'vue';
+import GIF from 'gif.js';
+import gifWorkerUrl from 'gif.js/dist/gif.worker.js?url';
+import JSZip from 'jszip';
+import type { Sprite } from '../types/sprites';
+import { getMaxDimensions } from './useSprites';
+import { calculateNegativeSpacing } from './useNegativeSpacing';
+
+export const useExport = (sprites: Ref<Sprite[]>, columns: Ref<number>, negativeSpacingEnabled: Ref<boolean>, backgroundColor?: Ref<string>, manualCellSizeEnabled?: Ref<boolean>, manualCellWidth?: Ref<number>, manualCellHeight?: Ref<number>) => {
+  const getCellDimensions = () => {
+    // If manual cell size is enabled, use manual values
+    if (manualCellSizeEnabled?.value) {
+      return {
+        cellWidth: manualCellWidth?.value ?? 64,
+        cellHeight: manualCellHeight?.value ?? 64,
+        negativeSpacing: 0,
+      };
+    }
+
+    // Otherwise, calculate from sprite dimensions
+    const { maxWidth, maxHeight } = getMaxDimensions(sprites.value);
+    const negativeSpacing = calculateNegativeSpacing(sprites.value, negativeSpacingEnabled.value);
+    return {
+      cellWidth: maxWidth + negativeSpacing,
+      cellHeight: maxHeight + negativeSpacing,
+      negativeSpacing,
+    };
+  };
+
+  const downloadSpritesheet = () => {
+    if (!sprites.value.length) {
+      alert('Please upload or import sprites before downloading the spritesheet.');
+      return;
+    }
+
+    const { cellWidth, cellHeight, negativeSpacing } = getCellDimensions();
+    const rows = Math.ceil(sprites.value.length / columns.value);
+
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+
+    canvas.width = cellWidth * columns.value;
+    canvas.height = cellHeight * rows;
+    ctx.imageSmoothingEnabled = false;
+
+    // Apply background color if not transparent
+    if (backgroundColor?.value && backgroundColor.value !== 'transparent') {
+      ctx.fillStyle = backgroundColor.value;
+      ctx.fillRect(0, 0, canvas.width, canvas.height);
+    }
+
+    sprites.value.forEach((sprite, index) => {
+      const col = index % columns.value;
+      const row = Math.floor(index / columns.value);
+      const cellX = Math.floor(col * cellWidth);
+      const cellY = Math.floor(row * cellHeight);
+      ctx.drawImage(sprite.img, Math.floor(cellX + negativeSpacing + sprite.x), Math.floor(cellY + negativeSpacing + sprite.y));
+    });
+
+    const link = document.createElement('a');
+    link.download = 'spritesheet.png';
+    link.href = canvas.toDataURL('image/png', 1.0);
+    link.click();
+  };
+
+  const exportSpritesheetJSON = async () => {
+    if (!sprites.value.length) {
+      alert('Nothing to export. Please add sprites first.');
+      return;
+    }
+
+    const spritesData = await Promise.all(
+      sprites.value.map(async sprite => {
+        const canvas = document.createElement('canvas');
+        const ctx = canvas.getContext('2d');
+        if (!ctx) return null;
+        canvas.width = sprite.width;
+        canvas.height = sprite.height;
+        ctx.drawImage(sprite.img, 0, 0);
+        const base64Data = canvas.toDataURL('image/png');
+        return {
+          id: sprite.id,
+          width: sprite.width,
+          height: sprite.height,
+          x: sprite.x,
+          y: sprite.y,
+          base64: base64Data,
+          name: sprite.file.name,
+        };
+      })
+    );
+
+    const jsonData = {
+      columns: columns.value,
+      negativeSpacingEnabled: negativeSpacingEnabled.value,
+      backgroundColor: backgroundColor?.value || 'transparent',
+      manualCellSizeEnabled: manualCellSizeEnabled?.value || false,
+      manualCellWidth: manualCellWidth?.value || 64,
+      manualCellHeight: manualCellHeight?.value || 64,
+      sprites: spritesData.filter(Boolean),
+    };
+    const jsonString = JSON.stringify(jsonData, null, 2);
+    const blob = new Blob([jsonString], { type: 'application/json' });
+    const url = URL.createObjectURL(blob);
+    const link = document.createElement('a');
+    link.download = 'spritesheet.json';
+    link.href = url;
+    link.click();
+    URL.revokeObjectURL(url);
+  };
+
+  const importSpritesheetJSON = async (jsonFile: File) => {
+    const jsonText = await jsonFile.text();
+    const jsonData = JSON.parse(jsonText);
+
+    if (!jsonData.sprites || !Array.isArray(jsonData.sprites)) throw new Error('Invalid JSON format: missing sprites array');
+
+    if (jsonData.columns && typeof jsonData.columns === 'number') columns.value = jsonData.columns;
+    if (typeof jsonData.negativeSpacingEnabled === 'boolean') negativeSpacingEnabled.value = jsonData.negativeSpacingEnabled;
+    if (typeof jsonData.backgroundColor === 'string' && backgroundColor) backgroundColor.value = jsonData.backgroundColor;
+    if (typeof jsonData.manualCellSizeEnabled === 'boolean' && manualCellSizeEnabled) manualCellSizeEnabled.value = jsonData.manualCellSizeEnabled;
+    if (typeof jsonData.manualCellWidth === 'number' && manualCellWidth) manualCellWidth.value = jsonData.manualCellWidth;
+    if (typeof jsonData.manualCellHeight === 'number' && manualCellHeight) manualCellHeight.value = jsonData.manualCellHeight;
+
+    // revoke existing blob urls
+    if (sprites.value.length) {
+      sprites.value.forEach(s => {
+        if (s.url && s.url.startsWith('blob:')) {
+          try {
+            URL.revokeObjectURL(s.url);
+          } catch {}
+        }
+      });
+    }
+
+    const imported = await Promise.all(
+      jsonData.sprites.map((spriteData: any) => {
+        return new Promise<Sprite>(resolve => {
+          const img = new Image();
+          img.onload = () => {
+            const byteString = atob(spriteData.base64.split(',')[1]);
+            const mimeType = spriteData.base64.split(',')[0].split(':')[1].split(';')[0];
+            const ab = new ArrayBuffer(byteString.length);
+            const ia = new Uint8Array(ab);
+            for (let i = 0; i < byteString.length; i++) ia[i] = byteString.charCodeAt(i);
+            const blob = new Blob([ab], { type: mimeType });
+            const fileName = spriteData.name || `sprite-${spriteData.id}.png`;
+            const file = new File([blob], fileName, { type: mimeType });
+            resolve({
+              id: spriteData.id || crypto.randomUUID(),
+              file,
+              img,
+              url: spriteData.base64,
+              width: spriteData.width,
+              height: spriteData.height,
+              x: spriteData.x || 0,
+              y: spriteData.y || 0,
+            });
+          };
+          img.src = spriteData.base64;
+        });
+      })
+    );
+
+    sprites.value = imported;
+  };
+
+  const downloadAsGif = (fps: number) => {
+    if (!sprites.value.length) {
+      alert('Please upload or import sprites before generating a GIF.');
+      return;
+    }
+
+    const { cellWidth, cellHeight, negativeSpacing } = getCellDimensions();
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+    canvas.width = cellWidth;
+    canvas.height = cellHeight;
+    ctx.imageSmoothingEnabled = false;
+
+    const gif = new GIF({ workers: 2, quality: 10, width: cellWidth, height: cellHeight, workerScript: gifWorkerUrl });
+
+    sprites.value.forEach(sprite => {
+      ctx.clearRect(0, 0, canvas.width, canvas.height);
+      // Apply background color if not transparent
+      if (backgroundColor?.value && backgroundColor.value !== 'transparent') {
+        ctx.fillStyle = backgroundColor.value;
+        ctx.fillRect(0, 0, canvas.width, canvas.height);
+      }
+      ctx.drawImage(sprite.img, Math.floor(negativeSpacing + sprite.x), Math.floor(negativeSpacing + sprite.y));
+      gif.addFrame(ctx, { copy: true, delay: 1000 / fps });
+    });
+
+    gif.on('finished', (blob: Blob) => {
+      const url = URL.createObjectURL(blob);
+      const link = document.createElement('a');
+      link.download = 'animation.gif';
+      link.href = url;
+      link.click();
+      URL.revokeObjectURL(url);
+    });
+
+    gif.render();
+  };
+
+  const downloadAsZip = async () => {
+    if (!sprites.value.length) {
+      alert('Please upload or import sprites before downloading a ZIP.');
+      return;
+    }
+
+    const zip = new JSZip();
+    const { cellWidth, cellHeight, negativeSpacing } = getCellDimensions();
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+    canvas.width = cellWidth;
+    canvas.height = cellHeight;
+    ctx.imageSmoothingEnabled = false;
+
+    sprites.value.forEach((sprite, index) => {
+      ctx.clearRect(0, 0, canvas.width, canvas.height);
+      // Apply background color if not transparent
+      if (backgroundColor?.value && backgroundColor.value !== 'transparent') {
+        ctx.fillStyle = backgroundColor.value;
+        ctx.fillRect(0, 0, canvas.width, canvas.height);
+      }
+      ctx.drawImage(sprite.img, Math.floor(negativeSpacing + sprite.x), Math.floor(negativeSpacing + sprite.y));
+      const dataURL = canvas.toDataURL('image/png');
+      const binary = atob(dataURL.split(',')[1]);
+      const buf = new ArrayBuffer(binary.length);
+      const view = new Uint8Array(buf);
+      for (let i = 0; i < binary.length; i++) view[i] = binary.charCodeAt(i);
+      const baseName = sprite.file?.name ? sprite.file.name.replace(/\s+/g, '_') : `sprite_${index + 1}.png`;
+      const name = `${index + 1}_${baseName}`;
+      zip.file(name, view);
+    });
+
+    const content = await zip.generateAsync({ type: 'blob' });
+    const url = URL.createObjectURL(content);
+    const link = document.createElement('a');
+    link.download = 'sprites.zip';
+    link.href = url;
+    link.click();
+    URL.revokeObjectURL(url);
+  };
+
+  return { downloadSpritesheet, exportSpritesheetJSON, importSpritesheetJSON, downloadAsGif, downloadAsZip };
+};

src/composables/useExportLayers.ts

@@ -0,0 +1,304 @@
+import type { Ref } from 'vue';
+import GIF from 'gif.js';
+import gifWorkerUrl from 'gif.js/dist/gif.worker.js?url';
+import JSZip from 'jszip';
+import type { Layer, Sprite } from '@/types/sprites';
+import { getMaxDimensionsAcrossLayers } from './useLayers';
+import { calculateNegativeSpacing } from './useNegativeSpacing';
+
+export const useExportLayers = (layersRef: Ref<Layer[]>, columns: Ref<number>, negativeSpacingEnabled: Ref<boolean>, activeLayerId?: Ref<string>, backgroundColor?: Ref<string>, manualCellSizeEnabled?: Ref<boolean>, manualCellWidth?: Ref<number>, manualCellHeight?: Ref<number>) => {
+  const getVisibleLayers = () => layersRef.value.filter(l => l.visible);
+  const getAllVisibleSprites = () => getVisibleLayers().flatMap(l => l.sprites);
+
+  const getCellDimensions = () => {
+    // If manual cell size is enabled, use manual values
+    if (manualCellSizeEnabled?.value) {
+      return {
+        cellWidth: manualCellWidth?.value ?? 64,
+        cellHeight: manualCellHeight?.value ?? 64,
+        negativeSpacing: 0,
+      };
+    }
+
+    // Otherwise, calculate from sprite dimensions
+    const visibleLayers = getVisibleLayers();
+    const { maxWidth, maxHeight } = getMaxDimensionsAcrossLayers(visibleLayers);
+    const negativeSpacing = calculateNegativeSpacing(getAllVisibleSprites(), negativeSpacingEnabled.value);
+    return {
+      cellWidth: maxWidth + negativeSpacing,
+      cellHeight: maxHeight + negativeSpacing,
+      negativeSpacing,
+    };
+  };
+
+  const drawCompositeCell = (ctx: CanvasRenderingContext2D, cellIndex: number, cellWidth: number, cellHeight: number, negativeSpacing: number) => {
+    ctx.clearRect(0, 0, cellWidth, cellHeight);
+    // Apply background color if not transparent
+    if (backgroundColor?.value && backgroundColor.value !== 'transparent') {
+      ctx.fillStyle = backgroundColor.value;
+      ctx.fillRect(0, 0, cellWidth, cellHeight);
+    }
+    const vLayers = getVisibleLayers();
+    vLayers.forEach(layer => {
+      const sprite = layer.sprites[cellIndex];
+      if (!sprite) return;
+      ctx.drawImage(sprite.img, Math.floor(negativeSpacing + sprite.x), Math.floor(negativeSpacing + sprite.y));
+    });
+  };
+
+  const downloadSpritesheet = () => {
+    const visibleLayers = getVisibleLayers();
+    if (!visibleLayers.length || !visibleLayers.some(l => l.sprites.length)) {
+      alert('Please upload or import sprites before downloading the spritesheet.');
+      return;
+    }
+
+    const { cellWidth, cellHeight, negativeSpacing } = getCellDimensions();
+    const maxLen = Math.max(...visibleLayers.map(l => l.sprites.length));
+    const rows = Math.ceil(maxLen / columns.value);
+
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+    canvas.width = cellWidth * columns.value;
+    canvas.height = cellHeight * rows;
+    ctx.imageSmoothingEnabled = false;
+
+    // Apply background color to entire canvas if not transparent
+    if (backgroundColor?.value && backgroundColor.value !== 'transparent') {
+      ctx.fillStyle = backgroundColor.value;
+      ctx.fillRect(0, 0, canvas.width, canvas.height);
+    }
+
+    for (let index = 0; index < maxLen; index++) {
+      const col = index % columns.value;
+      const row = Math.floor(index / columns.value);
+      const cellX = Math.floor(col * cellWidth);
+      const cellY = Math.floor(row * cellHeight);
+
+      const cellCanvas = document.createElement('canvas');
+      const cellCtx = cellCanvas.getContext('2d');
+      if (!cellCtx) return;
+      cellCanvas.width = cellWidth;
+      cellCanvas.height = cellHeight;
+      cellCtx.imageSmoothingEnabled = false;
+      drawCompositeCell(cellCtx, index, cellWidth, cellHeight, negativeSpacing);
+      ctx.drawImage(cellCanvas, cellX, cellY);
+    }
+
+    const link = document.createElement('a');
+    link.download = 'spritesheet.png';
+    link.href = canvas.toDataURL('image/png', 1.0);
+    link.click();
+  };
+
+  const exportSpritesheetJSON = async () => {
+    const visibleLayers = getVisibleLayers();
+    if (!visibleLayers.length || !visibleLayers.some(l => l.sprites.length)) {
+      alert('Nothing to export. Please add sprites first.');
+      return;
+    }
+
+    const layersData = await Promise.all(
+      layersRef.value.map(async layer => {
+        const sprites = await Promise.all(
+          layer.sprites.map(async sprite => {
+            const canvas = document.createElement('canvas');
+            const ctx = canvas.getContext('2d');
+            if (!ctx) return null;
+            canvas.width = sprite.width;
+            canvas.height = sprite.height;
+            ctx.drawImage(sprite.img, 0, 0);
+            const base64 = canvas.toDataURL('image/png');
+            return { id: sprite.id, width: sprite.width, height: sprite.height, x: sprite.x, y: sprite.y, base64, name: sprite.file.name };
+          })
+        );
+        return { id: layer.id, name: layer.name, visible: layer.visible, locked: layer.locked, sprites: sprites.filter(Boolean) };
+      })
+    );
+
+    const json = {
+      version: 2,
+      columns: columns.value,
+      negativeSpacingEnabled: negativeSpacingEnabled.value,
+      backgroundColor: backgroundColor?.value || 'transparent',
+      manualCellSizeEnabled: manualCellSizeEnabled?.value || false,
+      manualCellWidth: manualCellWidth?.value || 64,
+      manualCellHeight: manualCellHeight?.value || 64,
+      layers: layersData,
+    };
+    const jsonString = JSON.stringify(json, null, 2);
+    const blob = new Blob([jsonString], { type: 'application/json' });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = 'spritesheet.json';
+    a.click();
+    URL.revokeObjectURL(url);
+  };
+
+  const importSpritesheetJSON = async (jsonFile: File) => {
+    const text = await jsonFile.text();
+    const data = JSON.parse(text);
+
+    const loadSprite = (spriteData: any) =>
+      new Promise<Sprite>(resolve => {
+        const img = new Image();
+        img.onload = () => {
+          const byteString = atob(spriteData.base64.split(',')[1]);
+          const mimeType = spriteData.base64.split(',')[0].split(':')[1].split(';')[0];
+          const ab = new ArrayBuffer(byteString.length);
+          const ia = new Uint8Array(ab);
+          for (let i = 0; i < byteString.length; i++) ia[i] = byteString.charCodeAt(i);
+          const blob = new Blob([ab], { type: mimeType });
+          const fileName = spriteData.name || `sprite-${spriteData.id}.png`;
+          const file = new File([blob], fileName, { type: mimeType });
+          resolve({ id: spriteData.id || crypto.randomUUID(), file, img, url: spriteData.base64, width: spriteData.width, height: spriteData.height, x: spriteData.x || 0, y: spriteData.y || 0 });
+        };
+        img.src = spriteData.base64;
+      });
+
+    if (typeof data.columns === 'number') columns.value = data.columns;
+    if (typeof data.negativeSpacingEnabled === 'boolean') negativeSpacingEnabled.value = data.negativeSpacingEnabled;
+    if (typeof data.backgroundColor === 'string' && backgroundColor) backgroundColor.value = data.backgroundColor;
+    if (typeof data.manualCellSizeEnabled === 'boolean' && manualCellSizeEnabled) manualCellSizeEnabled.value = data.manualCellSizeEnabled;
+    if (typeof data.manualCellWidth === 'number' && manualCellWidth) manualCellWidth.value = data.manualCellWidth;
+    if (typeof data.manualCellHeight === 'number' && manualCellHeight) manualCellHeight.value = data.manualCellHeight;
+
+    if (Array.isArray(data.layers)) {
+      const newLayers: Layer[] = [];
+      for (const layerData of data.layers) {
+        const sprites: Sprite[] = await Promise.all(layerData.sprites.map((s: any) => loadSprite(s)));
+        newLayers.push({ id: layerData.id || crypto.randomUUID(), name: layerData.name || 'Layer', visible: layerData.visible !== false, locked: !!layerData.locked, sprites });
+      }
+      // Ensure at least one layer with sprites is visible
+      if (newLayers.length > 0 && !newLayers.some(l => l.visible && l.sprites.length > 0)) {
+        const firstLayerWithSprites = newLayers.find(l => l.sprites.length > 0);
+        if (firstLayerWithSprites) {
+          firstLayerWithSprites.visible = true;
+        }
+      }
+      layersRef.value = newLayers;
+      // Set active layer to the first layer with sprites
+      if (activeLayerId && newLayers.length > 0) {
+        const firstWithSprites = newLayers.find(l => l.sprites.length > 0);
+        activeLayerId.value = firstWithSprites ? firstWithSprites.id : newLayers[0].id;
+      }
+      return;
+    }
+
+    if (Array.isArray(data.sprites)) {
+      const sprites: Sprite[] = await Promise.all(data.sprites.map((s: any) => loadSprite(s)));
+      const baseLayerId = crypto.randomUUID();
+      layersRef.value = [
+        { id: baseLayerId, name: 'Base', visible: true, locked: false, sprites },
+        { id: crypto.randomUUID(), name: 'Other', visible: true, locked: false, sprites: [] },
+      ];
+      if (activeLayerId) {
+        activeLayerId.value = baseLayerId;
+      }
+      return;
+    }
+
+    throw new Error('Invalid JSON format');
+  };
+
+  const downloadAsGif = (fps: number) => {
+    const visibleLayers = getVisibleLayers();
+    if (!visibleLayers.length || !visibleLayers.some(l => l.sprites.length)) {
+      alert('Please upload or import sprites before generating a GIF.');
+      return;
+    }
+
+    const { cellWidth, cellHeight, negativeSpacing } = getCellDimensions();
+
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+    canvas.width = cellWidth;
+    canvas.height = cellHeight;
+    ctx.imageSmoothingEnabled = false;
+
+    const gif = new GIF({ workers: 2, quality: 10, width: cellWidth, height: cellHeight, workerScript: gifWorkerUrl });
+    const maxLen = Math.max(...visibleLayers.map(l => l.sprites.length));
+    for (let i = 0; i < maxLen; i++) {
+      drawCompositeCell(ctx, i, cellWidth, cellHeight, negativeSpacing);
+      gif.addFrame(ctx, { copy: true, delay: 1000 / fps });
+    }
+
+    gif.on('finished', (blob: Blob) => {
+      const url = URL.createObjectURL(blob);
+      const a = document.createElement('a');
+      a.href = url;
+      a.download = 'animation.gif';
+      a.click();
+      URL.revokeObjectURL(url);
+    });
+    gif.render();
+  };
+
+  const downloadAsZip = async () => {
+    const visibleLayers = getVisibleLayers();
+    if (!visibleLayers.length || !visibleLayers.some(l => l.sprites.length)) {
+      alert('Please upload or import sprites before downloading a ZIP.');
+      return;
+    }
+    const zip = new JSZip();
+
+    const { cellWidth, cellHeight, negativeSpacing } = getCellDimensions();
+
+    const canvas = document.createElement('canvas');
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+    canvas.width = cellWidth;
+    canvas.height = cellHeight;
+    ctx.imageSmoothingEnabled = false;
+
+    const maxLen = Math.max(...visibleLayers.map(l => l.sprites.length));
+    for (let i = 0; i < maxLen; i++) {
+      drawCompositeCell(ctx, i, cellWidth, cellHeight, negativeSpacing);
+      const dataURL = canvas.toDataURL('image/png');
+      const binary = atob(dataURL.split(',')[1]);
+      const buf = new ArrayBuffer(binary.length);
+      const view = new Uint8Array(buf);
+      for (let j = 0; j < binary.length; j++) view[j] = binary.charCodeAt(j);
+      zip.file(`frames/frame_${String(i + 1).padStart(3, '0')}.png`, view);
+    }
+
+    const jsonFolder = zip.folder('export')!;
+    const jsonBlobPromise = (async () => {
+      const layersPayload = await Promise.all(
+        layersRef.value.map(async layer => ({
+          id: layer.id,
+          name: layer.name,
+          visible: layer.visible,
+          locked: layer.locked,
+          sprites: await Promise.all(layer.sprites.map(async s => ({ id: s.id, width: s.width, height: s.height, x: s.x, y: s.y, name: s.file.name }))),
+        }))
+      );
+      const meta = {
+        version: 2,
+        columns: columns.value,
+        negativeSpacingEnabled: negativeSpacingEnabled.value,
+        backgroundColor: backgroundColor?.value || 'transparent',
+        manualCellSizeEnabled: manualCellSizeEnabled?.value || false,
+        manualCellWidth: manualCellWidth?.value || 64,
+        manualCellHeight: manualCellHeight?.value || 64,
+        layers: layersPayload,
+      };
+      const metaStr = JSON.stringify(meta, null, 2);
+      jsonFolder.file('spritesheet.meta.json', metaStr);
+    })();
+    await jsonBlobPromise;
+
+    const content = await zip.generateAsync({ type: 'blob' });
+    const url = URL.createObjectURL(content);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = 'sprites.zip';
+    a.click();
+    URL.revokeObjectURL(url);
+  };
+
+  return { downloadSpritesheet, exportSpritesheetJSON, importSpritesheetJSON, downloadAsGif, downloadAsZip };
+};

src/composables/useFileDrop.ts

@@ -0,0 +1,110 @@
+import { ref, type Ref, type ComputedRef } from 'vue';
+import type { Sprite } from '@/types/sprites';
+import { getMaxDimensions } from './useSprites';
+
+export interface FileDropOptions {
+  sprites: Ref<Sprite[]> | ComputedRef<Sprite[]> | Sprite[];
+  onAddSprite: (file: File) => void;
+  onAddSpriteWithResize: (file: File) => void;
+}
+
+export function useFileDrop(options: FileDropOptions) {
+  const { onAddSprite, onAddSpriteWithResize } = options;
+
+  // Helper to get sprites array
+  const getSprites = () => (Array.isArray(options.sprites) ? options.sprites : options.sprites.value);
+
+  const isDragOver = ref(false);
+
+  const handleDragOver = (event: DragEvent) => {
+    event.preventDefault();
+    event.stopPropagation();
+    if (event.dataTransfer) {
+      event.dataTransfer.dropEffect = 'copy';
+    }
+    isDragOver.value = true;
+  };
+
+  const handleDragEnter = (event: DragEvent) => {
+    event.preventDefault();
+    event.stopPropagation();
+    isDragOver.value = true;
+  };
+
+  const handleDragLeave = (event: DragEvent, canvasRef?: HTMLElement | null) => {
+    event.preventDefault();
+    event.stopPropagation();
+
+    if (canvasRef) {
+      const rect = canvasRef.getBoundingClientRect();
+      if (event.clientX < rect.left || event.clientX > rect.right || event.clientY < rect.top || event.clientY > rect.bottom) {
+        isDragOver.value = false;
+      }
+    } else {
+      isDragOver.value = false;
+    }
+  };
+
+  const processDroppedImage = (file: File): Promise<void> => {
+    return new Promise((resolve, reject) => {
+      const img = new Image();
+      const reader = new FileReader();
+
+      reader.onload = e => {
+        if (e.target?.result) {
+          img.src = e.target.result as string;
+        }
+      };
+
+      img.onload = () => {
+        const sprites = getSprites();
+        const { maxWidth, maxHeight } = getMaxDimensions(sprites);
+
+        // Check if the dropped image is larger than current cells
+        if (img.naturalWidth > maxWidth || img.naturalHeight > maxHeight) {
+          onAddSpriteWithResize(file);
+        } else {
+          onAddSprite(file);
+        }
+        resolve();
+      };
+
+      img.onerror = () => {
+        console.error('Failed to load image:', file.name);
+        reject(new Error('Failed to load image'));
+      };
+
+      reader.readAsDataURL(file);
+    });
+  };
+
+  const handleDrop = async (event: DragEvent) => {
+    event.preventDefault();
+    event.stopPropagation();
+    isDragOver.value = false;
+
+    if (!event.dataTransfer?.files || event.dataTransfer.files.length === 0) {
+      return;
+    }
+
+    const files = Array.from(event.dataTransfer.files).filter(file => file.type.startsWith('image/'));
+
+    if (files.length === 0) {
+      alert('Please drop image files only.');
+      return;
+    }
+
+    // Process each dropped file
+    for (const file of files) {
+      await processDroppedImage(file);
+    }
+  };
+
+  return {
+    isDragOver,
+    handleDragOver,
+    handleDragEnter,
+    handleDragLeave,
+    handleDrop,
+  };
+}

src/composables/useLayers.ts

@@ -0,0 +1,250 @@
+import { computed, ref, watch } from 'vue';
+import type { Layer, Sprite } from '@/types/sprites';
+import { getMaxDimensions as getMaxDimensionsSingle, useSprites as useSpritesSingle } from './useSprites';
+import { useSettingsStore } from '@/stores/useSettingsStore';
+
+export const createEmptyLayer = (name: string): Layer => ({
+  id: crypto.randomUUID(),
+  name,
+  sprites: [],
+  visible: true,
+  locked: false,
+});
+
+const layers = ref<Layer[]>([createEmptyLayer('Base')]);
+const activeLayerId = ref<string>(layers.value[0].id);
+const columns = ref(4);
+
+export const useLayers = () => {
+  const settingsStore = useSettingsStore();
+
+  watch(columns, val => {
+    const num = typeof val === 'number' ? val : parseInt(String(val));
+    const safe = Number.isFinite(num) && num >= 1 ? Math.min(num, 10) : 1;
+    if (safe !== columns.value) columns.value = safe;
+  });
+
+  const activeLayer = computed(() => layers.value.find(l => l.id === activeLayerId.value) || layers.value[0]);
+
+  const getMaxDimensions = (sprites: Sprite[]) => getMaxDimensionsSingle(sprites);
+
+  const visibleLayers = computed(() => layers.value.filter(l => l.visible));
+
+  const hasSprites = computed(() => layers.value.some(l => l.sprites.length > 0));
+
+  const updateSpritePosition = (id: string, x: number, y: number) => {
+    const l = activeLayer.value;
+    if (!l) return;
+    const i = l.sprites.findIndex(s => s.id === id);
+    if (i !== -1) {
+      l.sprites[i].x = Math.floor(x);
+      l.sprites[i].y = Math.floor(y);
+    }
+  };
+
+  const updateSpriteInLayer = (layerId: string, spriteId: string, x: number, y: number) => {
+    const l = layers.value.find(layer => layer.id === layerId);
+    if (!l) return;
+    const i = l.sprites.findIndex(s => s.id === spriteId);
+    if (i !== -1) {
+      l.sprites[i].x = Math.floor(x);
+      l.sprites[i].y = Math.floor(y);
+    }
+  };
+
+  const alignSprites = (position: 'left' | 'center' | 'right' | 'top' | 'middle' | 'bottom') => {
+    const l = activeLayer.value;
+    if (!l || !l.sprites.length) return;
+
+    // Determine the cell dimensions to align within
+    let cellWidth: number;
+    let cellHeight: number;
+
+    if (settingsStore.manualCellSizeEnabled) {
+      // Use manual cell size (without negative spacing)
+      cellWidth = settingsStore.manualCellWidth;
+      cellHeight = settingsStore.manualCellHeight;
+    } else {
+      // Use auto-calculated dimensions based on ALL visible layers (not just active layer)
+      const { maxWidth, maxHeight } = getMaxDimensionsAcrossLayers(visibleLayers.value);
+      cellWidth = maxWidth;
+      cellHeight = maxHeight;
+    }
+
+    l.sprites = l.sprites.map(sprite => {
+      let x = sprite.x;
+      let y = sprite.y;
+      switch (position) {
+        case 'left':
+          x = 0;
+          break;
+        case 'center':
+          x = Math.floor((cellWidth - sprite.width) / 2);
+          break;
+        case 'right':
+          x = Math.floor(cellWidth - sprite.width);
+          break;
+        case 'top':
+          y = 0;
+          break;
+        case 'middle':
+          y = Math.floor((cellHeight - sprite.height) / 2);
+          break;
+        case 'bottom':
+          y = Math.floor(cellHeight - sprite.height);
+          break;
+      }
+      return { ...sprite, x: Math.floor(x), y: Math.floor(y) };
+    });
+  };
+
+  const updateSpriteCell = (id: string, newIndex: number) => {
+    const l = activeLayer.value;
+    if (!l) return;
+    const currentIndex = l.sprites.findIndex(s => s.id === id);
+    if (currentIndex === -1 || currentIndex === newIndex) return;
+    const next = [...l.sprites];
+    if (newIndex < next.length) {
+      const moving = { ...next[currentIndex] };
+      const target = { ...next[newIndex] };
+      next[currentIndex] = target;
+      next[newIndex] = moving;
+    } else {
+      const [moved] = next.splice(currentIndex, 1);
+      next.splice(newIndex, 0, moved);
+    }
+    l.sprites = next;
+  };
+
+  const removeSprite = (id: string) => {
+    const l = activeLayer.value;
+    if (!l) return;
+    const i = l.sprites.findIndex(s => s.id === id);
+    if (i === -1) return;
+    const s = l.sprites[i];
+    if (s.url && s.url.startsWith('blob:')) {
+      try {
+        URL.revokeObjectURL(s.url);
+      } catch {}
+    }
+    l.sprites.splice(i, 1);
+  };
+
+  const replaceSprite = (id: string, file: File) => {
+    const l = activeLayer.value;
+    if (!l) return;
+    const i = l.sprites.findIndex(s => s.id === id);
+    if (i === -1) return;
+    const old = l.sprites[i];
+    if (old.url && old.url.startsWith('blob:')) {
+      try {
+        URL.revokeObjectURL(old.url);
+      } catch {}
+    }
+
+    const reader = new FileReader();
+    reader.onload = e => {
+      const url = e.target?.result as string;
+      const img = new Image();
+      img.onload = () => {
+        l.sprites[i] = { id: old.id, file, img, url, width: img.width, height: img.height, x: old.x, y: old.y };
+      };
+      img.onerror = () => {
+        console.error('Failed to load replacement image:', file.name);
+      };
+      img.src = url;
+    };
+    reader.onerror = () => {
+      console.error('Failed to read replacement image file:', file.name);
+    };
+    reader.readAsDataURL(file);
+  };
+
+  const addSprite = (file: File) => {
+    const l = activeLayer.value;
+    if (!l) return;
+    const reader = new FileReader();
+    reader.onload = e => {
+      const url = e.target?.result as string;
+      const img = new Image();
+      img.onload = () => {
+        const next: Sprite = {
+          id: crypto.randomUUID(),
+          file,
+          img,
+          url,
+          width: img.width,
+          height: img.height,
+          x: 0,
+          y: 0,
+        };
+        l.sprites = [...l.sprites, next];
+      };
+      img.onerror = () => {
+        console.error('Failed to load sprite image:', file.name);
+      };
+      img.src = url;
+    };
+    reader.onerror = () => {
+      console.error('Failed to read sprite image file:', file.name);
+    };
+    reader.readAsDataURL(file);
+  };
+
+  const processImageFiles = async (files: File[]) => {
+    for (const f of files) addSprite(f);
+  };
+
+  const addLayer = (name?: string) => {
+    const l = createEmptyLayer(name || `Layer ${layers.value.length + 1}`);
+    layers.value.push(l);
+    activeLayerId.value = l.id;
+  };
+
+  const removeLayer = (id: string) => {
+    if (layers.value.length === 1) return;
+    const idx = layers.value.findIndex(l => l.id === id);
+    if (idx === -1) return;
+    layers.value.splice(idx, 1);
+    if (activeLayerId.value === id) activeLayerId.value = layers.value[0].id;
+  };
+
+  const moveLayer = (id: string, direction: 'up' | 'down') => {
+    const idx = layers.value.findIndex(l => l.id === id);
+    if (idx === -1) return;
+    if (direction === 'up' && idx > 0) {
+      const [l] = layers.value.splice(idx, 1);
+      layers.value.splice(idx - 1, 0, l);
+    }
+    if (direction === 'down' && idx < layers.value.length - 1) {
+      const [l] = layers.value.splice(idx, 1);
+      layers.value.splice(idx + 1, 0, l);
+    }
+  };
+
+  return {
+    layers,
+    visibleLayers,
+    activeLayerId,
+    activeLayer,
+    columns,
+    getMaxDimensions,
+    updateSpritePosition,
+    updateSpriteInLayer,
+    updateSpriteCell,
+    removeSprite,
+    replaceSprite,
+    addSprite,
+    processImageFiles,
+    alignSprites,
+    addLayer,
+    removeLayer,
+    moveLayer,
+    hasSprites,
+  };
+};
+
+export const getMaxDimensionsAcrossLayers = (layers: Layer[]) => {
+  const sprites = layers.flatMap(l => (l.visible ? l.sprites : []));
+  return getMaxDimensionsSingle(sprites);
+};

src/composables/useNegativeSpacing.ts

@@ -0,0 +1,21 @@
+import type { Sprite } from '@/types/sprites';
+import { getMaxDimensions } from './useSprites';
+
+/**
+ * Calculate negative spacing to add to top-left of cells.
+ * Uses half the available space so spacing is equal on all sides.
+ */
+export function calculateNegativeSpacing(sprites: Sprite[], enabled: boolean): number {
+  if (!enabled || sprites.length === 0) return 0;
+
+  const { maxWidth, maxHeight } = getMaxDimensions(sprites);
+  const minWidth = Math.min(...sprites.map(s => s.width));
+  const minHeight = Math.min(...sprites.map(s => s.height));
+
+  // Available space is the gap between cell size and smallest sprite
+  const availableWidth = maxWidth - minWidth;
+  const availableHeight = maxHeight - minHeight;
+
+  // Use half to balance spacing equally on all sides
+  return Math.floor(Math.min(availableWidth, availableHeight) / 2);
+}

src/composables/useSEO.ts

@@ -0,0 +1,71 @@
+import { useHead } from '@vueuse/head';
+
+export interface SEOMetaData {
+  title: string;
+  description: string;
+  image?: string;
+  url?: string;
+  type?: 'website' | 'article';
+  author?: string;
+  publishedTime?: string;
+  modifiedTime?: string;
+  keywords?: string;
+}
+
+const SITE_NAME = 'Spritesheet Generator';
+const SITE_URL = 'https://spritesheetgenerator.online';
+const DEFAULT_IMAGE = '/og-image.png';
+
+export function useSEO(metadata: SEOMetaData) {
+  const fullTitle = metadata.title.includes(SITE_NAME) ? metadata.title : `${metadata.title} - ${SITE_NAME}`;
+
+  const fullUrl = metadata.url ? `${SITE_URL}${metadata.url}` : SITE_URL;
+
+  const imageUrl = metadata.image ? `${SITE_URL}${metadata.image}` : `${SITE_URL}${DEFAULT_IMAGE}`;
+
+  const metaTags: any[] = [
+    // Primary Meta Tags
+    { name: 'title', content: fullTitle },
+    { name: 'description', content: metadata.description },
+    { name: 'robots', content: 'index, follow' },
+
+    // Open Graph / Facebook
+    { property: 'og:type', content: metadata.type || 'website' },
+    { property: 'og:url', content: fullUrl },
+    { property: 'og:title', content: fullTitle },
+    { property: 'og:description', content: metadata.description },
+    { property: 'og:image', content: imageUrl },
+    { property: 'og:site_name', content: SITE_NAME },
+
+    // Twitter
+    { name: 'twitter:card', content: 'summary_large_image' },
+    { name: 'twitter:url', content: fullUrl },
+    { name: 'twitter:title', content: fullTitle },
+    { name: 'twitter:description', content: metadata.description },
+    { name: 'twitter:image', content: imageUrl },
+  ];
+
+  // Add article-specific meta tags
+  if (metadata.type === 'article') {
+    if (metadata.author) {
+      metaTags.push({ property: 'article:author', content: metadata.author });
+    }
+    if (metadata.publishedTime) {
+      metaTags.push({ property: 'article:published_time', content: metadata.publishedTime });
+    }
+    if (metadata.modifiedTime) {
+      metaTags.push({ property: 'article:modified_time', content: metadata.modifiedTime });
+    }
+  }
+
+  // Add keywords if provided
+  if (metadata.keywords) {
+    metaTags.push({ name: 'keywords', content: metadata.keywords });
+  }
+
+  useHead({
+    title: fullTitle,
+    meta: metaTags,
+    link: [{ rel: 'canonical', href: fullUrl }],
+  });
+}

src/composables/useSprites.ts

@@ -0,0 +1,283 @@
+import { ref, watch, onUnmounted } from 'vue';
+import type { Sprite } from '../types/sprites';
+
+export const useSprites = () => {
+  const sprites = ref<Sprite[]>([]);
+  const columns = ref(4);
+
+  // Clamp and coerce columns to a safe range [1..10]
+  watch(columns, val => {
+    const num = typeof val === 'number' ? val : parseInt(String(val));
+    const safe = Number.isFinite(num) && num >= 1 ? Math.min(num, 10) : 1;
+    if (safe !== columns.value) columns.value = safe;
+  });
+
+  const updateSpritePosition = (id: string, x: number, y: number) => {
+    const i = sprites.value.findIndex(s => s.id === id);
+    if (i !== -1) {
+      sprites.value[i].x = Math.floor(x);
+      sprites.value[i].y = Math.floor(y);
+    }
+  };
+
+  const alignSprites = (position: 'left' | 'center' | 'right' | 'top' | 'middle' | 'bottom') => {
+    if (!sprites.value.length) return;
+
+    const { maxWidth, maxHeight } = getMaxDimensions(sprites.value);
+
+    sprites.value = sprites.value.map(sprite => {
+      let x = sprite.x;
+      let y = sprite.y;
+
+      switch (position) {
+        case 'left':
+          x = 0;
+          break;
+        case 'center':
+          x = Math.floor((maxWidth - sprite.width) / 2);
+          break;
+        case 'right':
+          x = Math.floor(maxWidth - sprite.width);
+          break;
+        case 'top':
+          y = 0;
+          break;
+        case 'middle':
+          y = Math.floor((maxHeight - sprite.height) / 2);
+          break;
+        case 'bottom':
+          y = Math.floor(maxHeight - sprite.height);
+          break;
+      }
+
+      return { ...sprite, x: Math.floor(x), y: Math.floor(y) };
+    });
+
+    triggerForceRedraw();
+  };
+
+  const updateSpriteCell = (id: string, newIndex: number) => {
+    const currentIndex = sprites.value.findIndex(s => s.id === id);
+    if (currentIndex === -1 || currentIndex === newIndex) return;
+
+    const next = [...sprites.value];
+    if (newIndex < sprites.value.length) {
+      const moving = { ...next[currentIndex] };
+      const target = { ...next[newIndex] };
+      next[currentIndex] = target;
+      next[newIndex] = moving;
+    } else {
+      const [moved] = next.splice(currentIndex, 1);
+      next.splice(newIndex, 0, moved);
+    }
+    sprites.value = next;
+  };
+
+  const removeSprite = (id: string) => {
+    const i = sprites.value.findIndex(s => s.id === id);
+    if (i === -1) return;
+    const s = sprites.value[i];
+    revokeIfBlob(s.url);
+    sprites.value.splice(i, 1);
+  };
+
+  const replaceSprite = (id: string, file: File) => {
+    const i = sprites.value.findIndex(s => s.id === id);
+    if (i === -1) return;
+    const old = sprites.value[i];
+    revokeIfBlob(old.url);
+
+    const reader = new FileReader();
+    reader.onload = e => {
+      const url = e.target?.result as string;
+      const img = new Image();
+      img.onload = () => {
+        const next: Sprite = {
+          id: old.id,
+          file,
+          img,
+          url,
+          width: img.width,
+          height: img.height,
+          x: old.x,
+          y: old.y,
+        };
+        const arr = [...sprites.value];
+        arr[i] = next;
+        sprites.value = arr;
+      };
+      img.onerror = () => {
+        console.error('Failed to load replacement image:', file.name);
+      };
+      img.src = url;
+    };
+    reader.onerror = () => {
+      console.error('Failed to read replacement image file:', file.name);
+    };
+    reader.readAsDataURL(file);
+  };
+
+  const addSprite = (file: File) => {
+    const reader = new FileReader();
+    reader.onload = e => {
+      const url = e.target?.result as string;
+      const img = new Image();
+      img.onload = () => {
+        const s: Sprite = {
+          id: crypto.randomUUID(),
+          file,
+          img,
+          url,
+          width: img.width,
+          height: img.height,
+          x: 0,
+          y: 0,
+        };
+        sprites.value = [...sprites.value, s];
+      };
+      img.onerror = () => {
+        console.error('Failed to load new sprite image:', file.name);
+      };
+      img.src = url;
+    };
+    reader.onerror = () => {
+      console.error('Failed to read sprite image file:', file.name);
+    };
+    reader.readAsDataURL(file);
+  };
+
+  const addSpriteWithResize = (file: File) => {
+    const reader = new FileReader();
+    reader.onload = e => {
+      const url = e.target?.result as string;
+      const img = new Image();
+      img.onload = () => {
+        const { maxWidth, maxHeight } = getMaxDimensions(sprites.value);
+
+        const newSprite: Sprite = {
+          id: crypto.randomUUID(),
+          file,
+          img,
+          url,
+          width: img.width,
+          height: img.height,
+          x: 0,
+          y: 0,
+        };
+
+        const newMaxWidth = Math.max(maxWidth, img.width);
+        const newMaxHeight = Math.max(maxHeight, img.height);
+
+        if (img.width > maxWidth || img.height > maxHeight) {
+          sprites.value = sprites.value.map(sprite => {
+            let newX = sprite.x;
+            let newY = sprite.y;
+
+            if (img.width > maxWidth) {
+              const relativeX = maxWidth > 0 ? sprite.x / maxWidth : 0;
+              newX = Math.floor(relativeX * newMaxWidth);
+              newX = Math.max(0, Math.min(newX, newMaxWidth - sprite.width));
+            }
+
+            if (img.height > maxHeight) {
+              const relativeY = maxHeight > 0 ? sprite.y / maxHeight : 0;
+              newY = Math.floor(relativeY * newMaxHeight);
+              newY = Math.max(0, Math.min(newY, newMaxHeight - sprite.height));
+            }
+
+            return { ...sprite, x: newX, y: newY };
+          });
+        }
+
+        sprites.value = [...sprites.value, newSprite];
+        triggerForceRedraw();
+      };
+      img.onerror = () => {
+        console.error('Failed to load new sprite image:', file.name);
+      };
+      img.src = url;
+    };
+    reader.onerror = () => {
+      console.error('Failed to read sprite image file:', file.name);
+    };
+    reader.readAsDataURL(file);
+  };
+
+  const processImageFiles = (files: File[]) => {
+    Promise.all(
+      files.map(
+        file =>
+          new Promise<Sprite>((resolve, reject) => {
+            const reader = new FileReader();
+            reader.onload = e => {
+              const url = e.target?.result as string;
+              const img = new Image();
+              img.onload = () => {
+                resolve({
+                  id: crypto.randomUUID(),
+                  file,
+                  img,
+                  url,
+                  width: img.width,
+                  height: img.height,
+                  x: 0,
+                  y: 0,
+                });
+              };
+              img.onerror = () => reject(new Error(`Failed to load image: ${file.name}`));
+              img.src = url;
+            };
+            reader.onerror = () => reject(new Error(`Failed to read file: ${file.name}`));
+            reader.readAsDataURL(file);
+          })
+      )
+    )
+      .then(newSprites => {
+        sprites.value = [...sprites.value, ...newSprites];
+      })
+      .catch(err => {
+        console.error('Error processing image files:', err);
+      });
+  };
+
+  onUnmounted(() => {
+    sprites.value.forEach(s => revokeIfBlob(s.url));
+  });
+
+  return {
+    sprites,
+    columns,
+    updateSpritePosition,
+    alignSprites,
+    updateSpriteCell,
+    removeSprite,
+    replaceSprite,
+    addSprite,
+    addSpriteWithResize,
+    processImageFiles,
+  };
+};
+
+export const getMaxDimensions = (arr: Sprite[] | Readonly<Sprite[]>): { maxWidth: number; maxHeight: number } => {
+  let maxWidth = 0;
+  let maxHeight = 0;
+  arr.forEach(s => {
+    if (s.width > maxWidth) maxWidth = s.width;
+    if (s.height > maxHeight) maxHeight = s.height;
+  });
+  return { maxWidth, maxHeight };
+};
+
+export const revokeIfBlob = (url?: string) => {
+  if (url && url.startsWith('blob:')) {
+    try {
+      URL.revokeObjectURL(url);
+    } catch {}
+  }
+};
+
+export const triggerForceRedraw = () => {
+  setTimeout(() => {
+    window.dispatchEvent(new Event('forceRedraw'));
+  }, 0);
+};

src/composables/useStructuredData.ts

@@ -0,0 +1,200 @@
+import { useHead } from '@vueuse/head';
+
+const SITE_URL = 'https://spritesheetgenerator.online';
+const SITE_NAME = 'Spritesheet Generator';
+
+export interface BlogPostSchema {
+  title: string;
+  description: string;
+  author: string;
+  datePublished: string;
+  dateModified?: string;
+  image: string;
+  url: string;
+}
+
+export interface BreadcrumbItem {
+  name: string;
+  url: string;
+}
+
+export interface FAQItem {
+  question: string;
+  answer: string;
+}
+
+export function useStructuredData() {
+  // Organization Schema
+  const addOrganizationSchema = () => {
+    const schema = {
+      '@context': 'https://schema.org',
+      '@type': 'Organization',
+      name: SITE_NAME,
+      url: SITE_URL,
+      logo: `${SITE_URL}/og-image.png`,
+      description: 'Free online tool to create spritesheets for game development',
+      sameAs: ['https://gitea.adhd.sh/root/spritesheet-generator', 'https://discord.gg/JTev3nzeDa'],
+    };
+
+    useHead({
+      script: [
+        {
+          type: 'application/ld+json',
+          children: JSON.stringify(schema),
+        },
+      ],
+    });
+  };
+
+  // WebSite Schema
+  const addWebSiteSchema = () => {
+    const schema = {
+      '@context': 'https://schema.org',
+      '@type': 'WebSite',
+      name: SITE_NAME,
+      url: SITE_URL,
+      description: 'Create professional spritesheets for your game development projects',
+      potentialAction: {
+        '@type': 'SearchAction',
+        target: `${SITE_URL}/blog?search={search_term_string}`,
+        'query-input': 'required name=search_term_string',
+      },
+    };
+
+    useHead({
+      script: [
+        {
+          type: 'application/ld+json',
+          children: JSON.stringify(schema),
+        },
+      ],
+    });
+  };
+
+  // BlogPosting Schema
+  const addBlogPostSchema = (post: BlogPostSchema) => {
+    const schema = {
+      '@context': 'https://schema.org',
+      '@type': 'BlogPosting',
+      headline: post.title,
+      description: post.description,
+      image: `${SITE_URL}${post.image}`,
+      author: {
+        '@type': 'Person',
+        name: post.author,
+      },
+      publisher: {
+        '@type': 'Organization',
+        name: SITE_NAME,
+        logo: {
+          '@type': 'ImageObject',
+          url: `${SITE_URL}/og-image.png`,
+        },
+      },
+      datePublished: post.datePublished,
+      dateModified: post.dateModified || post.datePublished,
+      mainEntityOfPage: {
+        '@type': 'WebPage',
+        '@id': `${SITE_URL}${post.url}`,
+      },
+    };
+
+    useHead({
+      script: [
+        {
+          type: 'application/ld+json',
+          children: JSON.stringify(schema),
+        },
+      ],
+    });
+  };
+
+  // Breadcrumb Schema
+  const addBreadcrumbSchema = (items: BreadcrumbItem[]) => {
+    const schema = {
+      '@context': 'https://schema.org',
+      '@type': 'BreadcrumbList',
+      itemListElement: items.map((item, index) => ({
+        '@type': 'ListItem',
+        position: index + 1,
+        name: item.name,
+        item: `${SITE_URL}${item.url}`,
+      })),
+    };
+
+    useHead({
+      script: [
+        {
+          type: 'application/ld+json',
+          children: JSON.stringify(schema),
+        },
+      ],
+    });
+  };
+
+  // Blog List Schema
+  const addBlogListSchema = (posts: BlogPostSchema[]) => {
+    const schema = {
+      '@context': 'https://schema.org',
+      '@type': 'Blog',
+      name: `${SITE_NAME} Blog`,
+      description: 'Latest articles about sprite sheet generation and game development',
+      url: `${SITE_URL}/blog`,
+      blogPost: posts.map(post => ({
+        '@type': 'BlogPosting',
+        headline: post.title,
+        description: post.description,
+        image: `${SITE_URL}${post.image}`,
+        author: {
+          '@type': 'Person',
+          name: post.author,
+        },
+        datePublished: post.datePublished,
+        url: `${SITE_URL}${post.url}`,
+      })),
+    };
+
+    useHead({
+      script: [
+        {
+          type: 'application/ld+json',
+          children: JSON.stringify(schema),
+        },
+      ],
+    });
+  };
+
+  // FAQ Schema
+  const addFAQSchema = (faqs: FAQItem[]) => {
+    const schema = {
+      '@context': 'https://schema.org',
+      '@type': 'FAQPage',
+      mainEntity: faqs.map(faq => ({
+        '@type': 'Question',
+        name: faq.question,
+        acceptedAnswer: {
+          '@type': 'Answer',
+          text: faq.answer,
+        },
+      })),
+    };
+
+    useHead({
+      script: [
+        {
+          type: 'application/ld+json',
+          children: JSON.stringify(schema),
+        },
+      ],
+    });
+  };
+
+  return {
+    addOrganizationSchema,
+    addWebSiteSchema,
+    addBlogPostSchema,
+    addBreadcrumbSchema,
+    addBlogListSchema,
+    addFAQSchema,
+  };
+}

src/composables/useZoom.ts

@@ -0,0 +1,83 @@
+import { ref, computed } from 'vue';
+
+export interface ZoomOptionsStep {
+  min: number;
+  max: number;
+  step: number;
+  initial?: number;
+}
+
+export interface ZoomOptionsAllowed {
+  allowedValues: number[];
+  initial?: number;
+}
+
+export type ZoomOptions = ZoomOptionsStep | ZoomOptionsAllowed;
+
+function isStepOptions(options: ZoomOptions): options is ZoomOptionsStep {
+  return 'step' in options;
+}
+
+export function useZoom(options: ZoomOptions) {
+  const initial = options.initial ?? (isStepOptions(options) ? 1 : (options.allowedValues[1] ?? options.allowedValues[0]));
+  const zoom = ref(initial);
+
+  const zoomPercent = computed(() => Math.round(zoom.value * 100));
+
+  const increase = () => {
+    if (isStepOptions(options)) {
+      zoom.value = Math.min(options.max, zoom.value + options.step);
+    } else {
+      const currentIndex = options.allowedValues.indexOf(zoom.value);
+      if (currentIndex < options.allowedValues.length - 1) {
+        zoom.value = options.allowedValues[currentIndex + 1];
+      } else if (currentIndex === -1) {
+        // Find the nearest higher value
+        const higher = options.allowedValues.find(v => v > zoom.value);
+        if (higher !== undefined) {
+          zoom.value = higher;
+        }
+      }
+    }
+  };
+
+  const decrease = () => {
+    if (isStepOptions(options)) {
+      zoom.value = Math.max(options.min, zoom.value - options.step);
+    } else {
+      const currentIndex = options.allowedValues.indexOf(zoom.value);
+      if (currentIndex > 0) {
+        zoom.value = options.allowedValues[currentIndex - 1];
+      } else if (currentIndex === -1) {
+        // Find the nearest lower value
+        const lower = [...options.allowedValues].reverse().find(v => v < zoom.value);
+        if (lower !== undefined) {
+          zoom.value = lower;
+        }
+      }
+    }
+  };
+
+  const reset = () => {
+    zoom.value = initial;
+  };
+
+  const setZoom = (value: number) => {
+    if (isStepOptions(options)) {
+      zoom.value = Math.max(options.min, Math.min(options.max, value));
+    } else {
+      // Snap to nearest allowed value
+      const nearest = options.allowedValues.reduce((prev, curr) => (Math.abs(curr - value) < Math.abs(prev - value) ? curr : prev));
+      zoom.value = nearest;
+    }
+  };
+
+  return {
+    zoom,
+    zoomPercent,
+    increase,
+    decrease,
+    reset,
+    setZoom,
+  };
+}

src/main.ts

@@ -1,11 +1,21 @@
+import { Buffer } from 'buffer';
+// @ts-ignore
+window.Buffer = Buffer;
+
 import './assets/main.css';
 
 import { createApp } from 'vue';
 import { createPinia } from 'pinia';
+import { createHead } from '@vueuse/head';
 import App from './App.vue';
 
+import router from './router';
+
 const app = createApp(App);
+const head = createHead();
 
 app.use(createPinia());
+app.use(router);
+app.use(head);
 
 app.mount('#app');

src/router/index.ts

@@ -0,0 +1,52 @@
+import { createRouter, createWebHistory } from 'vue-router';
+import HomeView from '../views/HomeView.vue';
+
+const router = createRouter({
+  history: createWebHistory(import.meta.env.BASE_URL),
+  routes: [
+    {
+      path: '/',
+      name: 'home',
+      component: HomeView,
+    },
+    {
+      path: '/about',
+      name: 'about',
+      component: () => import('../views/AboutUs.vue'),
+    },
+    {
+      path: '/contact',
+      name: 'contact',
+      component: () => import('../views/Contact.vue'),
+    },
+    {
+      path: '/privacy-policy',
+      name: 'privacy-policy',
+      component: () => import('../views/PrivacyPolicy.vue'),
+    },
+    {
+      path: '/faq',
+      name: 'faq',
+      component: () => import('../views/FAQ.vue'),
+    },
+    {
+      path: '/blog',
+      name: 'blog-overview',
+      component: () => import('../views/BlogOverview.vue'),
+    },
+    {
+      path: '/blog/:slug',
+      name: 'blog-detail',
+      component: () => import('../views/BlogDetail.vue'),
+    },
+  ],
+  scrollBehavior(to, from, savedPosition) {
+    if (savedPosition) {
+      return savedPosition;
+    } else {
+      return { top: 0 };
+    }
+  },
+});
+
+export default router;

src/stores/useSettingsStore.ts

@@ -3,6 +3,12 @@ import { ref, watch } from 'vue';
 
 const pixelPerfect = ref(true);
 const darkMode = ref(false);
+const negativeSpacingEnabled = ref(false);
+const backgroundColor = ref('transparent');
+const manualCellSizeEnabled = ref(false);
+const manualCellWidth = ref(64);
+const manualCellHeight = ref(64);
+const checkerboardEnabled = ref(false);
 
 // Initialize dark mode from localStorage or system preference
 if (typeof window !== 'undefined') {
@@ -51,12 +57,54 @@ export const useSettingsStore = defineStore('settings', () => {
     darkMode.value = value;
   }
 
+  function toggleNegativeSpacing() {
+    negativeSpacingEnabled.value = !negativeSpacingEnabled.value;
+  }
+
+  function setBackgroundColor(color: string) {
+    backgroundColor.value = color;
+  }
+
+  function toggleManualCellSize() {
+    manualCellSizeEnabled.value = !manualCellSizeEnabled.value;
+  }
+
+  function setManualCellWidth(width: number) {
+    manualCellWidth.value = Math.max(1, Math.floor(width));
+  }
+
+  function setManualCellHeight(height: number) {
+    manualCellHeight.value = Math.max(1, Math.floor(height));
+  }
+
+  function setManualCellSize(width: number, height: number) {
+    setManualCellWidth(width);
+    setManualCellHeight(height);
+  }
+
+  function toggleCheckerboard() {
+    checkerboardEnabled.value = !checkerboardEnabled.value;
+  }
+
   return {
     pixelPerfect,
     darkMode,
+    negativeSpacingEnabled,
+    backgroundColor,
+    manualCellSizeEnabled,
+    manualCellWidth,
+    manualCellHeight,
+    checkerboardEnabled,
     togglePixelPerfect,
     setPixelPerfect,
     toggleDarkMode,
     setDarkMode,
+    toggleNegativeSpacing,
+    setBackgroundColor,
+    toggleManualCellSize,
+    setManualCellWidth,
+    setManualCellHeight,
+    setManualCellSize,
+    toggleCheckerboard,
   };
 });

src/types/sprites.ts

@@ -0,0 +1,26 @@
+export interface Sprite {
+  id: string;
+  file: File;
+  img: HTMLImageElement;
+  url: string;
+  width: number;
+  height: number;
+  x: number;
+  y: number;
+}
+
+export interface SpriteFile {
+  file: File;
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+}
+
+export interface Layer {
+  id: string;
+  name: string;
+  sprites: Sprite[];
+  visible: boolean;
+  locked: boolean;
+}

src/views/AboutUs.vue

@@ -0,0 +1,38 @@
+<script setup lang="ts">
+  import { useSEO } from '../composables/useSEO';
+  import { useStructuredData } from '../composables/useStructuredData';
+
+  const { addBreadcrumbSchema } = useStructuredData();
+
+  // Set SEO synchronously
+  useSEO({
+    title: 'About Us - Our Mission & Story',
+    description: 'Learn about Spritesheet Generator, a free tool designed to help game developers and artists streamline their workflow with optimized spritesheet creation.',
+    url: '/about',
+    type: 'website',
+    keywords: 'about spritesheet generator, game development tools, open source sprite editor',
+  });
+
+  addBreadcrumbSchema([
+    { name: 'Home', url: '/' },
+    { name: 'About Us', url: '/about' },
+  ]);
+</script>
+
+<template>
+  <div class="w-full">
+    <div class="bg-white/80 dark:bg-gray-900/80 backdrop-blur-md rounded-3xl shadow-2xl border border-gray-200/50 dark:border-gray-700/50 p-8 sm:p-12">
+      <h1 class="text-3xl sm:text-4xl font-extrabold text-gray-900 dark:text-white mb-6">About Us</h1>
+      <div class="space-y-6">
+        <p class="text-gray-700 dark:text-gray-300 leading-relaxed">Welcome to Spritesheet Generator, a tool designed to help game developers and artists streamline their workflow.</p>
+        <p class="text-gray-700 dark:text-gray-300 leading-relaxed">
+          Our mission is to provide a simple, powerful, and free tool for creating optimized spritesheets directly in your browser. Whether you are an indie developer, a hobbyist, or part of a large studio, we hope this tool makes your life easier.
+        </p>
+        <div class="space-y-3">
+          <h3 class="text-xl font-bold text-gray-900 dark:text-white">Our story</h3>
+          <p class="text-gray-700 dark:text-gray-300 leading-relaxed">This project started as a small utility for personal game jams and has grown into a full-featured spritesheet packer. We believe in open source and community-driven development.</p>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>

src/views/BlogDetail.vue

@@ -0,0 +1,152 @@
+<script setup lang="ts">
+  import { ref, onMounted, computed, watch } from 'vue';
+  import { useRoute, useRouter } from 'vue-router';
+  import { useBlog, type BlogPost } from '../composables/useBlog';
+  import { useHead } from '@vueuse/head';
+  import { marked } from 'marked';
+
+  const route = useRoute();
+  const router = useRouter();
+  const { getPost } = useBlog();
+  const post = ref<BlogPost | undefined>(undefined);
+  const renderedContent = ref('');
+
+  const slug = computed(() => route.params.slug as string);
+
+  // Reactive SEO data that updates when post loads
+  const pageTitle = computed(() => (post.value ? `${post.value.title} - Spritesheet Generator` : 'Blog Post - Spritesheet Generator'));
+
+  const pageDescription = computed(() => post.value?.description || 'Read our latest article about spritesheet generation and game development.');
+
+  const pageImage = computed(() => (post.value?.image ? `https://spritesheetgenerator.online${post.value.image}` : 'https://spritesheetgenerator.online/og-image.png'));
+
+  const pageUrl = computed(() => `https://spritesheetgenerator.online/blog/${slug.value}`);
+
+  const keywords = computed(() => post.value?.keywords || 'sprite sheet, game development, blog');
+
+  // Dynamic meta tags using reactive computed values
+  useHead({
+    title: pageTitle,
+    meta: [
+      { name: 'title', content: pageTitle },
+      { name: 'description', content: pageDescription },
+      { name: 'keywords', content: keywords },
+      { name: 'robots', content: 'index, follow' },
+
+      // Open Graph
+      { property: 'og:type', content: 'article' },
+      { property: 'og:url', content: pageUrl },
+      { property: 'og:title', content: pageTitle },
+      { property: 'og:description', content: pageDescription },
+      { property: 'og:image', content: pageImage },
+      { property: 'og:site_name', content: 'Spritesheet Generator' },
+      { property: 'article:author', content: computed(() => post.value?.author || 'streetshadow') },
+      { property: 'article:published_time', content: computed(() => post.value?.date || '') },
+
+      // Twitter
+      { name: 'twitter:card', content: 'summary_large_image' },
+      { name: 'twitter:url', content: pageUrl },
+      { name: 'twitter:title', content: pageTitle },
+      { name: 'twitter:description', content: pageDescription },
+      { name: 'twitter:image', content: pageImage },
+    ],
+    link: [{ rel: 'canonical', href: pageUrl }],
+    script: computed(() => {
+      const scripts = [];
+
+      // Breadcrumb schema
+      scripts.push({
+        type: 'application/ld+json',
+        children: JSON.stringify({
+          '@context': 'https://schema.org',
+          '@type': 'BreadcrumbList',
+          itemListElement: [
+            {
+              '@type': 'ListItem',
+              position: 1,
+              name: 'Home',
+              item: 'https://spritesheetgenerator.online/',
+            },
+            {
+              '@type': 'ListItem',
+              position: 2,
+              name: 'Blog',
+              item: 'https://spritesheetgenerator.online/blog',
+            },
+            {
+              '@type': 'ListItem',
+              position: 3,
+              name: post.value?.title || 'Article',
+              item: pageUrl.value,
+            },
+          ],
+        }),
+      });
+
+      // Blog post schema
+      if (post.value) {
+        scripts.push({
+          type: 'application/ld+json',
+          children: JSON.stringify({
+            '@context': 'https://schema.org',
+            '@type': 'BlogPosting',
+            headline: post.value.title,
+            description: post.value.description,
+            image: `https://spritesheetgenerator.online${post.value.image}`,
+            author: {
+              '@type': 'Person',
+              name: post.value.author || 'streetshadow',
+            },
+            publisher: {
+              '@type': 'Organization',
+              name: 'Spritesheet Generator',
+              logo: {
+                '@type': 'ImageObject',
+                url: 'https://spritesheetgenerator.online/og-image.png',
+              },
+            },
+            datePublished: post.value.date,
+            dateModified: post.value.date,
+            mainEntityOfPage: {
+              '@type': 'WebPage',
+              '@id': pageUrl.value,
+            },
+          }),
+        });
+      }
+
+      return scripts;
+    }),
+  });
+
+  onMounted(async () => {
+    post.value = await getPost(slug.value);
+
+    if (post.value) {
+      renderedContent.value = await marked(post.value.content);
+    } else {
+      router.push({ name: 'blog-overview' });
+    }
+  });
+</script>
+
+<template>
+  <div class="w-full">
+    <div v-if="post">
+      <RouterLink :to="{ name: 'blog-overview' }" class="inline-flex items-center text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white mb-6 transition-colors" title="Return to blog overview" aria-label="Navigate back to blog overview page">
+        <svg class="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7" />
+        </svg>
+        Back to overview
+      </RouterLink>
+
+      <h1 class="text-4xl font-bold mb-4 text-gray-900 dark:text-white">{{ post.title }}</h1>
+      <p class="text-gray-600 dark:text-gray-400 text-sm mb-8">{{ post.date }}</p>
+      <!-- Image is intentionally omitted here as per requirements -->
+      <div class="prose max-w-none" v-html="renderedContent"></div>
+    </div>
+    <div v-else class="text-center py-12">
+      <p class="text-xl text-gray-600 dark:text-gray-400">Loading...</p>
+    </div>
+  </div>
+</template>

src/views/BlogOverview.vue

@@ -0,0 +1,48 @@
+<script setup lang="ts">
+  import { ref, onMounted } from 'vue';
+  import { useBlog, type BlogPost } from '../composables/useBlog';
+  import { useSEO } from '../composables/useSEO';
+  import { useStructuredData } from '../composables/useStructuredData';
+  import { RouterLink } from 'vue-router';
+
+  const { getPosts } = useBlog();
+  const { addBreadcrumbSchema } = useStructuredData();
+  const posts = ref<BlogPost[]>([]);
+
+  // Set SEO meta tags synchronously
+  useSEO({
+    title: 'Blog - Latest Articles on Spritesheet Generation',
+    description: 'Explore our latest articles about sprite sheet generation, game development, pixel art, and sprite animation techniques.',
+    url: '/blog',
+    type: 'website',
+    keywords: 'sprite sheet blog, game development articles, pixel art tutorials, sprite animation',
+  });
+
+  // Add breadcrumb synchronously
+  addBreadcrumbSchema([
+    { name: 'Home', url: '/' },
+    { name: 'Blog', url: '/blog' },
+  ]);
+
+  onMounted(async () => {
+    posts.value = await getPosts();
+  });
+</script>
+
+<template>
+  <div class="w-full">
+    <h1 class="text-4xl font-bold mb-8 text-gray-900 dark:text-white">Blog</h1>
+    <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-6">
+      <article v-for="post in posts" :key="post.slug" class="bg-white dark:bg-gray-800 rounded-lg shadow-md overflow-hidden hover:shadow-lg transition-shadow duration-300 flex flex-col h-full">
+        <RouterLink :to="{ name: 'blog-detail', params: { slug: post.slug } }" class="flex flex-col h-full" :title="`Read more: ${post.title}`" :aria-label="`Read full blog post: ${post.title}`">
+          <img :src="post.image" :alt="post.title" class="w-full h-48 object-cover" loading="lazy" decoding="async" />
+          <div class="p-6 flex-1 flex flex-col">
+            <h2 class="text-xl font-bold mb-2 text-gray-900 dark:text-white line-clamp-2">{{ post.title }}</h2>
+            <p class="text-gray-600 dark:text-gray-400 text-xs mb-3">{{ post.date }}</p>
+            <p class="text-gray-700 dark:text-gray-300 text-sm line-clamp-3 flex-1">{{ post.description }}</p>
+          </div>
+        </RouterLink>
+      </article>
+    </div>
+  </div>
+</template>

src/views/Contact.vue

@@ -0,0 +1,62 @@
+<script setup lang="ts">
+  import { useSEO } from '../composables/useSEO';
+  import { useStructuredData } from '../composables/useStructuredData';
+
+  const { addBreadcrumbSchema } = useStructuredData();
+
+  // Set SEO synchronously
+  useSEO({
+    title: 'Contact Us - Get in Touch',
+    description: "Contact the Spritesheet Generator team. Join our Discord community or report bugs and contribute on Gitea. We'd love to hear from you!",
+    url: '/contact',
+    type: 'website',
+    keywords: 'contact spritesheet generator, support, discord, gitea',
+  });
+
+  addBreadcrumbSchema([
+    { name: 'Home', url: '/' },
+    { name: 'Contact', url: '/contact' },
+  ]);
+</script>
+
+<template>
+  <div class="w-full">
+    <div class="bg-white/80 dark:bg-gray-900/80 backdrop-blur-md rounded-3xl shadow-2xl border border-gray-200/50 dark:border-gray-700/50 p-8 sm:p-12">
+      <h1 class="text-3xl sm:text-4xl font-extrabold text-gray-900 dark:text-white mb-6">Contact Us</h1>
+      <div class="space-y-6">
+        <p class="text-gray-700 dark:text-gray-300 leading-relaxed">We'd love to hear from you! Whether you have a question, feedback, or just want to say hi, feel free to reach out.</p>
+        <div class="flex flex-col gap-4 mt-8">
+          <a
+            href="https://discord.gg/JTev3nzeDa"
+            target="_blank"
+            rel="noopener noreferrer"
+            class="flex items-center gap-3 p-4 bg-gray-100 dark:bg-gray-800 rounded-xl hover:bg-gray-200 dark:hover:bg-gray-700 transition-colors no-underline"
+            title="Join our Discord community"
+            aria-label="Join Discord server"
+          >
+            <i class="fab fa-discord text-2xl text-[#5865F2]"></i>
+            <div>
+              <div class="font-bold text-gray-900 dark:text-white">Join our Discord</div>
+              <div class="text-sm text-gray-600 dark:text-gray-400">Chat with the community and developers</div>
+            </div>
+          </a>
+
+          <a
+            href="https://gitea.adhd.sh/root/spritesheet-generator"
+            target="_blank"
+            rel="noopener noreferrer"
+            class="flex items-center gap-3 p-4 bg-gray-100 dark:bg-gray-800 rounded-xl hover:bg-gray-200 dark:hover:bg-gray-700 transition-colors no-underline"
+            title="View source code and report bugs"
+            aria-label="View source code repository"
+          >
+            <i class="fab fa-github text-2xl text-gray-900 dark:text-white"></i>
+            <div>
+              <div class="font-bold text-gray-900 dark:text-white">Source Code</div>
+              <div class="text-sm text-gray-600 dark:text-gray-400">Report bugs or contribute on Gitea</div>
+            </div>
+          </a>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>

src/views/FAQ.vue

@@ -0,0 +1,106 @@
+<script setup lang="ts">
+  import { useSEO } from '../composables/useSEO';
+  import { useStructuredData } from '../composables/useStructuredData';
+
+  const { addFAQSchema, addBreadcrumbSchema } = useStructuredData();
+
+  // Set SEO synchronously
+  useSEO({
+    title: 'FAQ - Frequently Asked Questions',
+    description: 'Find answers to common questions about the Spritesheet Generator. Learn about supported formats, export options, and how to use the tool effectively.',
+    url: '/faq',
+    type: 'website',
+    keywords: 'faq, spritesheet generator help, questions, support, documentation',
+  });
+
+  addBreadcrumbSchema([
+    { name: 'Home', url: '/' },
+    { name: 'FAQ', url: '/faq' },
+  ]);
+
+  const faqs = [
+    {
+      question: 'What is a sprite sheet generator?',
+      answer: 'A sprite sheet generator is a tool that combines multiple images into a single file. Our sprite maker online simplifies the process of making a sprite sheet, allowing you to create a sprite sheet for games and websites instantly.',
+    },
+    {
+      question: 'How do I create a sprite sheet from images?',
+      answer: 'To create a sprite sheet, simply drag and drop your files into our images to sprite sheet converter. We support various formats, making it easy to turn PNG to sprite sheet or use our gif to sprite sheet converter.',
+    },
+    {
+      question: 'Can I use this as a 2D sprite generator for games?',
+      answer: 'Yes! This tool acts as a powerful 2D sprite generator. Whether you need a character sprite sheet generator, an FNF sprite generator, or just a general sprite image generator, our tool handles the packing efficiently.',
+    },
+    {
+      question: 'Do you support GIF to sprite sheet conversion?',
+      answer: 'Absolutely. You can turn gif into sprite sheet layouts easily. Our tool creates a clean sprite strip or sprite grid from your animations, functioning as a comprehensive image to sprite animation tool.',
+    },
+    {
+      question: 'Is there a specific sprite sheet template?',
+      answer: 'No fixed sprite sheet template is needed. Our image sprite generator automatically arranges your uploads. It works as a flexible sprite converter for all your needs.',
+    },
+    {
+      question: 'How does the PNG to sprite conversion work?',
+      answer: 'Our PNG to sprite feature is simple. Upload your images, and the sprite sheet converter stitches them together. It is the easiest way to image to sprite converter workflows.',
+    },
+    {
+      question: 'Can I create a sprite sheet for Unity or Godot?',
+      answer: 'Yes, you can create a sprite sheet compatible with major game engines like Unity, Godot, and Unreal Engine. Our sprite sheet converter exports standard formats that work seamlessly with these tools.',
+    },
+    {
+      question: 'What is the difference between a sprite strip and a sprite grid?',
+      answer: 'A sprite strip arranges images in a single horizontal or vertical row, ideal for simple animations. A sprite grid arranges images in rows and columns, which is better for larger collections or character sprite sheets.',
+    },
+    {
+      question: 'Can I preview the image to sprite animation?',
+      answer: 'Yes, our tool includes a preview feature. After using the image to sprite animation function, you can play back the sequence to ensure your animation looks perfect before exporting.',
+    },
+    {
+      question: 'Does this sprite maker online work on mobile devices?',
+      answer: 'Our sprite maker online is fully responsive and works on most modern mobile devices and tablets, allowing you to create sprite sheets on the go.',
+    },
+    {
+      question: 'How many images can I add to the images to sprite sheet converter?',
+      answer: 'There is no hard limit on the number of images you can add to the images to sprite sheet converter, but performance may vary depending on your device and the size of the images.',
+    },
+  ];
+
+  addFAQSchema(faqs);
+</script>
+
+<template>
+  <div class="w-full">
+    <div class="bg-white/80 dark:bg-gray-900/80 backdrop-blur-md rounded-3xl shadow-2xl border border-gray-200/50 dark:border-gray-700/50 p-8 sm:p-12">
+      <h1 class="text-3xl sm:text-4xl font-extrabold text-gray-900 dark:text-white mb-6">Frequently Asked Questions</h1>
+      <p class="text-gray-700 dark:text-gray-300 leading-relaxed mb-10">Got questions? We've got answers. If you can't find what you're looking for, feel free to <router-link to="/contact" class="text-blue-600 dark:text-blue-400 hover:underline">contact us</router-link>.</p>
+
+      <div class="space-y-6">
+        <details
+          v-for="(faq, index) in faqs"
+          :key="index"
+          class="group bg-gray-50 dark:bg-gray-800/50 rounded-xl border border-gray-200 dark:border-gray-700 overflow-hidden transition-all duration-300 hover:shadow-md open:bg-white dark:open:bg-gray-800 open:shadow-lg open:border-blue-200 dark:open:border-blue-900"
+        >
+          <summary class="flex items-center justify-between p-6 cursor-pointer list-none">
+            <h3 class="text-lg font-bold text-gray-900 dark:text-white pr-4">{{ faq.question }}</h3>
+            <span class="transform transition-transform duration-300 group-open:rotate-180 text-gray-500 dark:text-gray-400">
+              <i class="fas fa-chevron-down"></i>
+            </span>
+          </summary>
+          <div class="px-6 pb-6 text-gray-700 dark:text-gray-300 leading-relaxed border-t border-gray-100 dark:border-gray-700/50 pt-4">
+            {{ faq.answer }}
+          </div>
+        </details>
+      </div>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+  /* Remove default triangle for details/summary */
+  details > summary {
+    list-style: none;
+  }
+  details > summary::-webkit-details-marker {
+    display: none;
+  }
+</style>

src/views/HomeView.seo.ts

@@ -0,0 +1,53 @@
+import { useSEO } from '../composables/useSEO';
+import { useStructuredData } from '../composables/useStructuredData';
+import { useHead } from '@vueuse/head';
+
+export function useHomeViewSEO() {
+  const { addOrganizationSchema, addWebSiteSchema } = useStructuredData();
+
+  // Set page SEO synchronously
+  useSEO({
+    title: 'Spritesheet Generator - Create Game Spritesheets Online',
+    description: 'Free online tool to create spritesheets for game development. Upload sprites, arrange them, and export as a spritesheet with animation preview.',
+    url: '/',
+    type: 'website',
+    keywords: 'spritesheet generator, sprite sheet maker, game development, pixel art, sprite animation, game assets, 2D game tools',
+  });
+
+  // Add organization schema
+  addOrganizationSchema();
+
+  // Add website schema
+  addWebSiteSchema();
+
+  // Add SoftwareApplication schema
+  useHead({
+    script: [
+      {
+        type: 'application/ld+json',
+        children: JSON.stringify({
+          '@context': 'https://schema.org',
+          '@type': 'SoftwareApplication',
+          name: 'Spritesheet Generator',
+          applicationCategory: 'DesignApplication',
+          offers: {
+            '@type': 'Offer',
+            price: '0',
+            priceCurrency: 'USD',
+          },
+          operatingSystem: 'Web Browser',
+          description: 'Free online tool to create spritesheets for game development. Upload sprites, arrange them, and export as a spritesheet with animation preview.',
+          url: 'https://spritesheetgenerator.online',
+          screenshot: 'https://spritesheetgenerator.online/og-image.png',
+          featureList: ['Free sprite editor', 'Automatic spritesheet generation', 'Customizable grid layouts', 'Animation preview', 'Cross-platform compatibility', 'Zero installation required', 'Batch processing', 'Multiple export formats (PNG, JPG, GIF, ZIP, JSON)'],
+          browserRequirements: 'Requires JavaScript. Requires HTML5.',
+          aggregateRating: {
+            '@type': 'AggregateRating',
+            ratingValue: '4.8',
+            ratingCount: '127',
+          },
+        }),
+      },
+    ],
+  });
+}

src/views/HomeView.vue

@@ -0,0 +1,434 @@
+<template>
+  <main class="flex flex-col flex-1 bg-white/80 dark:bg-gray-900/80 backdrop-blur-md rounded-3xl shadow-2xl border border-gray-200/50 dark:border-gray-700/50 transition-all duration-300" :class="{ 'lg:overflow-hidden': layers.some(l => l.sprites.length) }">
+    <!-- Welcome state -->
+    <div v-if="!layers.some(l => l.sprites.length)" class="p-6 sm:p-10">
+      <div class="mb-8">
+        <div class="flex items-center justify-between gap-4 mb-1">
+          <p class="text-2xl font-bold text-gray-800 dark:text-gray-100">Upload sprites or single image</p>
+          <a href="https://ko-fi.com/X8X416D44P" target="_blank" rel="noopener noreferrer">
+            <img height="36" style="border: 0px; height: 36px" src="https://storage.ko-fi.com/cdn/kofi6.png?v=6" alt="Buy Me a Coffee at ko-fi.com" />
+          </a>
+        </div>
+        <p class="text-sm text-gray-600 dark:text-gray-400">Drag and drop images or import from JSON</p>
+      </div>
+      <file-uploader @upload-sprites="handleSpritesUpload" />
+
+      <div class="mt-10">
+        <div class="prose prose-lg dark:prose-invert max-w-none">
+          <div>
+            <h1 class="text-2xl font-bold text-gray-800 dark:text-gray-100 mb-4">Welcome to Spritesheet generator</h1>
+            <p class="text-gray-700 dark:text-gray-300 mb-4">Create spritesheets for your game development and animation projects with our completely free, open-source Spritesheet generator.</p>
+            <p class="text-gray-700 dark:text-gray-300 mb-6">This powerful online tool lets you upload individual sprite images and automatically arrange them into optimized sprite sheets with customizable layouts - perfect for indie developers, animators, and studios of any size.</p>
+            <h3 class="text-2xl font-bold text-gray-800 dark:text-gray-100 mb-4">Key features of this sprite editor</h3>
+            <ul class="text-gray-700 dark:text-gray-300 mb-6 space-y-2 list-disc">
+              <li><strong>Free sprite editor</strong>: Edit, organize, and optimize your game sprites directly in your browser</li>
+              <li><strong>Automatic spritesheet generation</strong>: Convert multiple PNG, JPG, or GIF images into efficient sprite atlases</li>
+              <li><strong>Customizable grid layouts</strong>: Adjust spacing, padding, and arrangement for pixel-perfect results</li>
+              <li><strong>Animation preview</strong>: Test your sprite animations before exporting</li>
+              <li><strong>Cross-platform compatibility</strong>: Works with Unity, Godot, Phaser, Pygame, and other game engines</li>
+              <li><strong>Zero installation required</strong>: No downloads - use our web-based sprite sheet maker instantly</li>
+              <li><strong>Batch processing</strong>: Upload and process multiple sprites simultaneously</li>
+              <li><strong>Export options</strong>: Download spritesheet as PNG, JPG, GIF, ZIP or JSON.</li>
+            </ul>
+            <div>
+              <h4 class="text-xl font-bold text-gray-800 dark:text-gray-100 mb-4 flex items-center gap-2">
+                <i class="fas fa-play-circle text-gray-800 dark:text-gray-200"></i>
+                How it works
+              </h4>
+              <video controls playsinline class="w-full rounded-lg shadow-lg border border-gray-200 dark:border-gray-700" title="Spritesheet generator tutorial" aria-label="Spritesheet generator tutorial">
+                <source src="@/assets/demo.mp4" type="video/mp4" />
+              </video>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <!-- Two-column layout: Left controls, Right preview -->
+    <div v-if="layers.some(l => l.sprites.length)" class="flex flex-col flex-1 lg:grid lg:grid-cols-[380px_1fr] xl:grid-cols-[420px_1fr] lg:overflow-hidden">
+      <!-- Left sidebar - Controls -->
+      <div class="p-6 bg-gray-50/50 dark:bg-gray-900/30 border-b lg:border-b-0 lg:border-r border-gray-200 dark:border-gray-700 lg:overflow-y-auto lg:overflow-x-auto">
+        <div class="space-y-8">
+          <!-- Upload Section -->
+          <section>
+            <div class="flex items-center justify-between mb-3">
+              <h3 class="flex items-center gap-2 text-base font-bold text-gray-800 dark:text-gray-100">
+                <i class="text-sm text-gray-700 dark:text-gray-300 fas fa-upload"></i>
+                Upload
+              </h3>
+              <button @click="openJSONImportDialog" class="btn btn-dark btn-sm" data-rybbit-event="import-json">
+                <i class="text-xs fas fa-file-import"></i>
+                <span>JSON</span>
+              </button>
+            </div>
+            <button
+              class="w-full p-6 text-center border-2 border-dashed border-gray-300 dark:border-gray-600 rounded-xl hover:border-gray-500 dark:hover:border-gray-400 hover:bg-gray-50 dark:hover:bg-gray-800/50 transition-all cursor-pointer focus:outline-none focus:ring-2 focus:ring-gray-500 group"
+              @click="openFileDialog"
+            >
+              <i class="fas fa-plus-circle text-3xl text-gray-400 dark:text-gray-500 group-hover:text-gray-600 dark:group-hover:text-gray-300 mb-3 transition-colors"></i>
+              <p class="text-sm font-medium text-gray-600 dark:text-gray-400 group-hover:text-gray-900 dark:group-hover:text-gray-200 transition-colors">Add sprites</p>
+            </button>
+            <input ref="uploadInput" type="file" multiple accept="image/*" class="hidden" @change="handleUploadChange" />
+            <input ref="jsonFileInput" type="file" accept=".json,application/json" class="hidden" @change="handleJSONFileChange" />
+          </section>
+
+          <!-- Layers -->
+          <section>
+            <div class="flex items-center justify-between mb-3">
+              <h3 class="flex items-center gap-2 text-base font-bold text-gray-800 dark:text-gray-100">
+                <i class="text-sm text-gray-700 dark:text-gray-300 fas fa-layer-group"></i>
+                Layers
+              </h3>
+              <button @click="addLayer()" class="btn btn-dark btn-sm">
+                <i class="text-xs fas fa-plus"></i>
+                <span>Add</span>
+              </button>
+            </div>
+            <div class="space-y-2">
+              <div
+                v-for="layer in layers"
+                :key="layer.id"
+                class="flex items-center gap-2 px-3 py-2 bg-white dark:bg-gray-800 border rounded-lg transition-all"
+                :class="[layer.id === activeLayerId ? 'border-gray-800 ring-1 ring-gray-800 dark:border-gray-400 dark:ring-gray-400' : 'border-gray-200 dark:border-gray-700', !layer.visible ? 'opacity-50' : '']"
+              >
+                <button @click.stop="layer.visible = !layer.visible" class="btn btn-ghost btn-icon-sm rounded" :title="layer.visible ? 'Hide layer' : 'Show layer'">
+                  <i :class="layer.visible ? 'text-sm text-gray-800 dark:text-gray-200 fas fa-eye' : 'text-sm text-gray-400 dark:text-gray-500 fas fa-eye-slash'"></i>
+                </button>
+                <input
+                  v-if="editingLayerId === layer.id"
+                  type="text"
+                  v-model="editingLayerName"
+                  @blur="finishEditingLayer"
+                  @keyup.enter="finishEditingLayer"
+                  @keyup.esc="cancelEditingLayer"
+                  class="flex-1 px-2 py-1 text-sm border border-gray-800 dark:border-gray-400 dark:bg-gray-700 dark:text-gray-100 rounded outline-none focus:ring-2 focus:ring-gray-800 dark:focus:ring-gray-400"
+                  ref="layerNameInput"
+                  @click.stop
+                />
+                <button v-else @click="activeLayerId = layer.id" class="flex-1 px-2 py-1 text-sm font-medium text-left rounded transition-all cursor-pointer" :class="layer.id === activeLayerId ? 'text-gray-900 dark:text-gray-100' : 'text-gray-700 dark:text-gray-300'">
+                  {{ layer.name }}
+                  <span v-if="layer.sprites.length" class="ml-1 text-xs opacity-60">({{ layer.sprites.length }})</span>
+                </button>
+                <button v-if="editingLayerId !== layer.id" @click="startEditingLayer(layer.id, layer.name)" class="btn btn-ghost btn-icon-xs rounded" title="Rename">
+                  <i class="text-xs text-gray-600 dark:text-gray-400 fas fa-pen"></i>
+                </button>
+                <button @click="moveLayer(layer.id, 'up')" class="btn btn-ghost btn-icon-xs rounded" title="Move up">
+                  <i class="text-xs text-gray-600 dark:text-gray-400 fas fa-chevron-up"></i>
+                </button>
+                <button @click="moveLayer(layer.id, 'down')" class="btn btn-ghost btn-icon-xs rounded" title="Move down">
+                  <i class="text-xs text-gray-600 dark:text-gray-400 fas fa-chevron-down"></i>
+                </button>
+                <button v-if="layers.length > 1" @click="removeLayer(layer.id)" class="btn btn-danger btn-icon-xs rounded" title="Delete">
+                  <i class="text-xs fas fa-trash"></i>
+                </button>
+              </div>
+            </div>
+          </section>
+
+          <!-- Grid Settings -->
+          <section>
+            <h3 class="flex items-center gap-2 mb-3 text-base font-bold text-gray-800 dark:text-gray-100">
+              <i class="text-sm text-gray-700 dark:text-gray-300 fas fa-th"></i>
+              Grid
+            </h3>
+            <div class="space-y-3">
+              <div class="flex items-center justify-between px-3 py-2 bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg">
+                <label for="columns" class="text-sm font-medium text-gray-700 dark:text-gray-200">Columns</label>
+                <input id="columns" type="number" v-model.number="columns" min="1" max="10" class="input-field w-16" />
+              </div>
+
+              <div class="px-3 py-2 bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg">
+                <label class="flex items-center justify-between mb-2 cursor-pointer">
+                  <span class="text-sm font-medium text-gray-700 dark:text-gray-200">Manual size</span>
+                  <input type="checkbox" v-model="settingsStore.manualCellSizeEnabled" class="w-4 h-4 rounded" />
+                </label>
+                <div v-if="settingsStore.manualCellSizeEnabled" class="flex items-center gap-1.5 mt-2">
+                  <input type="number" v-model.number="settingsStore.manualCellWidth" min="1" max="2048" class="input-field w-full min-w-0" placeholder="W" />
+                  <span class="flex-shrink-0 text-gray-500 dark:text-gray-400">×</span>
+                  <input type="number" v-model.number="settingsStore.manualCellHeight" min="1" max="2048" class="input-field w-full min-w-0" placeholder="H" />
+                </div>
+                <div v-else class="mt-1 text-xs font-mono text-gray-500 dark:text-gray-400 break-words">{{ cellSize.width }} × {{ cellSize.height }}px</div>
+              </div>
+            </div>
+          </section>
+
+          <!-- Alignment -->
+          <section>
+            <h3 class="flex items-center gap-2 mb-3 text-base font-bold text-gray-800 dark:text-gray-100">
+              <i class="text-sm text-gray-700 dark:text-gray-300 fas fa-align-center"></i>
+              Align
+            </h3>
+            <div class="grid grid-cols-3 gap-2">
+              <button @click="alignSprites('left')" class="btn btn-secondary btn-sm" title="Left">
+                <i class="fas fa-arrow-left"></i>
+              </button>
+              <button @click="alignSprites('center')" class="btn btn-secondary btn-sm" title="Center">
+                <i class="fas fa-arrows-left-right"></i>
+              </button>
+              <button @click="alignSprites('right')" class="btn btn-secondary btn-sm" title="Right">
+                <i class="fas fa-arrow-right"></i>
+              </button>
+              <button @click="alignSprites('top')" class="btn btn-secondary btn-sm" title="Top">
+                <i class="fas fa-arrow-up"></i>
+              </button>
+              <button @click="alignSprites('middle')" class="btn btn-secondary btn-sm" title="Middle">
+                <i class="fas fa-arrows-up-down"></i>
+              </button>
+              <button @click="alignSprites('bottom')" class="btn btn-secondary btn-sm" title="Bottom">
+                <i class="fas fa-arrow-down"></i>
+              </button>
+            </div>
+          </section>
+
+          <!-- Export -->
+          <section>
+            <h3 class="flex items-center gap-2 mb-3 text-base font-bold text-gray-800 dark:text-gray-100">
+              <i class="text-sm text-gray-700 dark:text-gray-300 fas fa-download"></i>
+              Export
+            </h3>
+            <div class="grid grid-cols-2 gap-2">
+              <button @click="downloadSpritesheet" class="btn btn-dark btn-sm" data-rybbit-event="download-spritesheet">
+                <i class="fas fa-image"></i>
+                <span>PNG</span>
+              </button>
+              <button @click="exportSpritesheetJSON" class="btn btn-dark btn-sm" data-rybbit-event="export-json">
+                <i class="fas fa-file-code"></i>
+                <span>JSON</span>
+              </button>
+              <button @click="openGifFpsModal" class="btn btn-dark btn-sm" data-rybbit-event="download-gif">
+                <i class="fas fa-film"></i>
+                <span>GIF</span>
+              </button>
+              <button @click="downloadAsZip" class="btn btn-dark btn-sm" data-rybbit-event="download-zip">
+                <i class="fas fa-file-archive"></i>
+                <span>ZIP</span>
+              </button>
+            </div>
+          </section>
+        </div>
+      </div>
+
+      <!-- Right panel - Tabs -->
+      <div class="flex flex-col overflow-hidden">
+        <!-- Tab Navigation -->
+        <div class="bg-gray-50/50 dark:bg-gray-900/30 border-b border-gray-200 dark:border-gray-700">
+          <div class="flex gap-1 p-2">
+            <button
+              @click="activeTab = 'canvas'"
+              class="border-gray-600 border"
+              :class="['flex items-center gap-2 px-4 py-2 text-sm font-medium rounded-lg transition-all cursor-pointer', activeTab === 'canvas' ? 'bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 shadow-sm' : 'text-gray-600 dark:text-gray-400 hover:bg-white/50 dark:hover:bg-gray-800/50']"
+            >
+              <i class="fas fa-th"></i>
+              <span>Canvas</span>
+            </button>
+            <button
+              @click="activeTab = 'preview'"
+              class="border-gray-600 border"
+              :class="['flex items-center gap-2 px-4 py-2 text-sm font-medium rounded-lg transition-all cursor-pointer', activeTab === 'preview' ? 'bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 shadow-sm' : 'text-gray-600 dark:text-gray-400 hover:bg-white/50 dark:hover:bg-gray-800/50']"
+              data-rybbit-event="preview-animation"
+            >
+              <i class="fas fa-play"></i>
+              <span>Preview</span>
+            </button>
+          </div>
+        </div>
+
+        <!-- Tab Content -->
+        <div class="p-6 lg:flex-1 lg:overflow-auto">
+          <div v-if="activeTab === 'canvas'">
+            <sprite-canvas :layers="layers" :active-layer-id="activeLayerId" :columns="columns" @update-sprite="updateSpritePosition" @update-sprite-cell="updateSpriteCell" @remove-sprite="removeSprite" @replace-sprite="replaceSprite" @add-sprite="addSprite" />
+          </div>
+          <div v-if="activeTab === 'preview'">
+            <sprite-preview :layers="layers" :active-layer-id="activeLayerId" :columns="columns" @update-sprite="updateSpritePosition" @update-sprite-in-layer="updateSpriteInLayer" />
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <SpritesheetSplitter :is-open="isSpritesheetSplitterOpen" :image-url="spritesheetImageUrl" :image-file="spritesheetImageFile" @close="closeSpritesheetSplitter" @split="handleSplitSpritesheet" />
+    <GifFpsModal :is-open="isGifFpsModalOpen" @close="closeGifFpsModal" @confirm="downloadAsGif" :default-fps="10" />
+  </main>
+</template>
+
+<script setup lang="ts">
+  import { ref, toRef, computed } from 'vue';
+  import FileUploader from '@/components/FileUploader.vue';
+  import SpriteCanvas from '@/components/SpriteCanvas.vue';
+  import SpritePreview from '@/components/SpritePreview.vue';
+  import SpritesheetSplitter from '@/components/SpritesheetSplitter.vue';
+  import GifFpsModal from '@/components/GifFpsModal.vue';
+  import { useExportLayers } from '@/composables/useExportLayers';
+  import { useLayers } from '@/composables/useLayers';
+  import { getMaxDimensionsAcrossLayers } from '@/composables/useLayers';
+  import { useSettingsStore } from '@/stores/useSettingsStore';
+  import { calculateNegativeSpacing } from '@/composables/useNegativeSpacing';
+  import { useHomeViewSEO } from './HomeView.seo';
+  import type { SpriteFile } from '@/types/sprites';
+
+  // Initialize SEO
+  useHomeViewSEO();
+
+  const settingsStore = useSettingsStore();
+  const { layers, visibleLayers, activeLayer, activeLayerId, columns, updateSpritePosition, updateSpriteInLayer, updateSpriteCell, removeSprite, replaceSprite, addSprite, processImageFiles, alignSprites, addLayer, removeLayer, moveLayer } = useLayers();
+
+  const { downloadSpritesheet, exportSpritesheetJSON, importSpritesheetJSON, downloadAsGif, downloadAsZip } = useExportLayers(
+    layers,
+    columns,
+    toRef(settingsStore, 'negativeSpacingEnabled'),
+    activeLayerId,
+    toRef(settingsStore, 'backgroundColor'),
+    toRef(settingsStore, 'manualCellSizeEnabled'),
+    toRef(settingsStore, 'manualCellWidth'),
+    toRef(settingsStore, 'manualCellHeight')
+  );
+
+  const getCellSize = () => {
+    if (!visibleLayers.value.length) return { width: 0, height: 0 };
+
+    if (settingsStore.manualCellSizeEnabled) {
+      return { width: settingsStore.manualCellWidth, height: settingsStore.manualCellHeight };
+    }
+
+    const { maxWidth, maxHeight } = getMaxDimensionsAcrossLayers(visibleLayers.value);
+    const allSprites = visibleLayers.value.flatMap(l => l.sprites);
+    const negativeSpacing = calculateNegativeSpacing(allSprites, settingsStore.negativeSpacingEnabled);
+    return { width: maxWidth + negativeSpacing, height: maxHeight + negativeSpacing };
+  };
+
+  const cellSize = computed(getCellSize);
+  const activeTab = ref<'canvas' | 'preview'>('canvas');
+  const isSpritesheetSplitterOpen = ref(false);
+  const isGifFpsModalOpen = ref(false);
+  const uploadInput = ref<HTMLInputElement | null>(null);
+  const jsonFileInput = ref<HTMLInputElement | null>(null);
+  const spritesheetImageUrl = ref('');
+  const spritesheetImageFile = ref<File | null>(null);
+  const editingLayerId = ref<string | null>(null);
+  const editingLayerName = ref('');
+  const layerNameInput = ref<HTMLInputElement | null>(null);
+
+  const handleSpritesUpload = async (files: File[]) => {
+    const jsonFile = files.find(file => file.type === 'application/json' || file.name.endsWith('.json'));
+
+    if (jsonFile) {
+      await handleJSONImport(jsonFile);
+      return;
+    }
+
+    if (files.length === 1 && files[0].type.startsWith('image/')) {
+      const file = files[0];
+      const reader = new FileReader();
+      reader.onload = e => {
+        const url = e.target?.result as string;
+        const img = new Image();
+        img.onload = () => {
+          if (confirm('This looks like it might be a spritesheet. Would you like to split it into individual sprites?')) {
+            spritesheetImageUrl.value = url;
+            spritesheetImageFile.value = file;
+            isSpritesheetSplitterOpen.value = true;
+            return;
+          }
+
+          processImageFiles([file]);
+        };
+        img.onerror = () => {
+          console.error('Failed to load image:', file.name);
+        };
+        img.src = url;
+      };
+      reader.onerror = () => {
+        console.error('Failed to read image file:', file.name);
+      };
+      reader.readAsDataURL(file);
+      return;
+    }
+
+    processImageFiles(files);
+  };
+
+  const handleJSONImport = async (jsonFile: File) => {
+    try {
+      await importSpritesheetJSON(jsonFile);
+    } catch (error) {
+      console.error('Error importing JSON:', error);
+      alert('Failed to import JSON file. Please check the file format.');
+    }
+  };
+
+  const closeSpritesheetSplitter = () => {
+    isSpritesheetSplitterOpen.value = false;
+    if (spritesheetImageUrl.value && spritesheetImageUrl.value.startsWith('blob:')) {
+      try {
+        URL.revokeObjectURL(spritesheetImageUrl.value);
+      } catch {}
+    }
+    spritesheetImageUrl.value = '';
+    spritesheetImageFile.value = null;
+  };
+
+  const openGifFpsModal = () => {
+    if (!visibleLayers.value.some(l => l.sprites.length > 0)) {
+      alert('Please upload or import sprites before generating a GIF.');
+      return;
+    }
+    isGifFpsModalOpen.value = true;
+  };
+
+  const closeGifFpsModal = () => {
+    isGifFpsModalOpen.value = false;
+  };
+
+  const handleSplitSpritesheet = (spriteFiles: SpriteFile[]) => {
+    processImageFiles(spriteFiles.map(s => s.file));
+  };
+
+  const openJSONImportDialog = () => {
+    jsonFileInput.value?.click();
+  };
+
+  const handleJSONFileChange = async (event: Event) => {
+    const input = event.target as HTMLInputElement;
+    if (input.files && input.files.length > 0) {
+      await handleJSONImport(input.files[0]);
+      input.value = '';
+    }
+  };
+
+  const openFileDialog = () => {
+    uploadInput.value?.click();
+  };
+
+  const handleUploadChange = async (event: Event) => {
+    const input = event.target as HTMLInputElement;
+    if (input.files && input.files.length > 0) {
+      await handleSpritesUpload(Array.from(input.files));
+      input.value = '';
+    }
+  };
+
+  const startEditingLayer = (layerId: string, currentName: string) => {
+    editingLayerId.value = layerId;
+    editingLayerName.value = currentName;
+    // Focus the input on next tick
+    setTimeout(() => {
+      layerNameInput.value?.focus();
+      layerNameInput.value?.select();
+    }, 0);
+  };
+
+  const finishEditingLayer = () => {
+    if (editingLayerId.value && editingLayerName.value.trim()) {
+      const layer = layers.value.find(l => l.id === editingLayerId.value);
+      if (layer) {
+        layer.name = editingLayerName.value.trim();
+      }
+    }
+    editingLayerId.value = null;
+    editingLayerName.value = '';
+  };
+
+  const cancelEditingLayer = () => {
+    editingLayerId.value = null;
+    editingLayerName.value = '';
+  };
+</script>

src/views/PrivacyPolicy.vue

@@ -0,0 +1,56 @@
+<script setup lang="ts">
+  import { useSEO } from '../composables/useSEO';
+  import { useStructuredData } from '../composables/useStructuredData';
+
+  const { addBreadcrumbSchema } = useStructuredData();
+
+  // Set SEO synchronously
+  useSEO({
+    title: 'Privacy Policy - Your Data Protection',
+    description: 'Read our privacy policy. Spritesheet Generator is a client-side tool that does not collect personal data or upload your images to our servers.',
+    url: '/privacy-policy',
+    type: 'website',
+    keywords: 'privacy policy, data protection, client-side processing',
+  });
+
+  addBreadcrumbSchema([
+    { name: 'Home', url: '/' },
+    { name: 'Privacy Policy', url: '/privacy-policy' },
+  ]);
+</script>
+
+<template>
+  <div class="w-full">
+    <div class="bg-white/80 dark:bg-gray-900/80 backdrop-blur-md rounded-3xl shadow-2xl border border-gray-200/50 dark:border-gray-700/50 p-8 sm:p-12">
+      <h1 class="text-3xl sm:text-4xl font-extrabold text-gray-900 dark:text-white mb-6">Privacy Policy</h1>
+      <div class="space-y-6">
+        <p class="text-sm text-gray-500 dark:text-gray-400 mb-8">Last updated: November 26, 2025</p>
+
+        <div class="space-y-3">
+          <h3 class="text-xl font-bold text-gray-900 dark:text-white">1. Introduction</h3>
+          <p class="text-gray-700 dark:text-gray-300 leading-relaxed">We respect your privacy. This Spritesheet Generator is a client-side tool, meaning your images are processed directly in your browser and are not uploaded to our servers.</p>
+        </div>
+
+        <div class="space-y-3">
+          <h3 class="text-xl font-bold text-gray-900 dark:text-white">2. Data collection</h3>
+          <p class="text-gray-700 dark:text-gray-300 leading-relaxed">We do not collect any personal data or uploaded images. All processing happens locally on your device.</p>
+        </div>
+
+        <div class="space-y-3">
+          <h3 class="text-xl font-bold text-gray-900 dark:text-white">3. Local storage</h3>
+          <p class="text-gray-700 dark:text-gray-300 leading-relaxed">We use your browser's Local Storage to save your preferences (such as dark mode and grid settings) to improve your experience.</p>
+        </div>
+
+        <div class="space-y-3">
+          <h3 class="text-xl font-bold text-gray-900 dark:text-white">4. Third-Party services</h3>
+          <p class="text-gray-700 dark:text-gray-300 leading-relaxed">We do not use third-party services for analytics.</p>
+        </div>
+
+        <div class="space-y-3">
+          <h3 class="text-xl font-bold text-gray-900 dark:text-white">5. Contact</h3>
+          <p class="text-gray-700 dark:text-gray-300 leading-relaxed">If you have any questions about this Privacy Policy, please contact us via our Discord server.</p>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>

tailwind.config.js

@@ -68,5 +68,7 @@ export default {
       }),
     },
   },
-  plugins: [],
+  plugins: [
+    require('@tailwindcss/typography'),
+  ],
 }