diff --git a/README.md b/README.md
index fdacbc6..c5ba1e3 100644
--- a/README.md
+++ b/README.md
@@ -48,9 +48,17 @@ Eine Web-App inspiriert von Heardle, bei der Nutzer täglich einen Song anhand k
     - **Markdown Support:** Formatierung von Texten, Links und Listen.
     - **Homepage Integration:** Dezentrale Anzeige auf der Startseite (collapsible).
     - **Featured News:** Hervorhebung wichtiger Ankündigungen.
-    - **Special-Verknüpfung:** Direkte Links zu Specials in News-Beiträgen.
+    - Special-Verknüpfung: Direkte Links zu Specials in News-Beiträgen.
     - Verwaltung über das Admin-Dashboard.
 
+## White Labeling
+
+Hördle ist "White Label Ready". Das bedeutet, du kannst das Branding (Name, Farben, Logos) komplett anpassen, ohne den Code zu ändern.
+
+👉 **[Anleitung zur Anpassung (White Label Guide)](WHITE_LABEL.md)**
+
+Die Konfiguration erfolgt einfach über Umgebungsvariablen und CSS-Variablen.
+
 ## Spielregeln & Punktesystem
 
 Das Ziel ist es, den Song mit so wenigen Hinweisen wie möglich zu erraten und dabei einen möglichst hohen Highscore zu erzielen.
diff --git a/WHITE_LABEL.md b/WHITE_LABEL.md
new file mode 100644
index 0000000..1524d8e
--- /dev/null
+++ b/WHITE_LABEL.md
@@ -0,0 +1,67 @@
+# White Labeling Guide
+
+This application is designed to be easily white-labeled. You can customize the branding, colors, and configuration without modifying the core code.
+
+## Configuration
+
+The application is configured via environment variables. You can set these in a `.env` or `.env.local` file.
+
+### Branding
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `NEXT_PUBLIC_APP_NAME` | The name of the application. | `Hördle` |
+| `NEXT_PUBLIC_APP_DESCRIPTION` | The description used in metadata. | `Daily music guessing game...` |
+| `NEXT_PUBLIC_DOMAIN` | The domain name (used for sharing). | `hoerdle.elpatron.me` |
+| `NEXT_PUBLIC_TWITTER_HANDLE` | Twitter handle for metadata. | `@elpatron` |
+
+### Analytics (Plausible)
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `NEXT_PUBLIC_PLAUSIBLE_DOMAIN` | The domain to track in Plausible. | `hoerdle.elpatron.me` |
+| `NEXT_PUBLIC_PLAUSIBLE_SCRIPT_SRC` | The URL of the Plausible script. | `https://plausible.elpatron.me/js/script.js` |
+
+### Credits
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `NEXT_PUBLIC_CREDITS_ENABLED` | Enable/disable footer credits (`true`/`false`). | `true` |
+| `NEXT_PUBLIC_CREDITS_TEXT` | Text before the link. | `Vibe coded with ☕ and 🍺 by` |
+| `NEXT_PUBLIC_CREDITS_LINK_TEXT` | Text of the link. | `@elpatron@digitalcourage.social` |
+| `NEXT_PUBLIC_CREDITS_LINK_URL` | URL of the link. | `https://digitalcourage.social/@elpatron` |
+
+## Theming
+
+The application uses CSS variables for theming. You can override these variables in your own CSS file or by modifying `app/globals.css`.
+
+### Key Colors
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `--primary` | Main action color (buttons). | `#000000` |
+| `--secondary` | Secondary actions. | `#4b5563` |
+| `--accent` | Accent color. | `#667eea` |
+| `--success` | Success state (correct guess). | `#22c55e` |
+| `--danger` | Error state (wrong guess). | `#ef4444` |
+| `--warning` | Warning state (stars). | `#ffc107` |
+| `--muted` | Muted backgrounds. | `#f3f4f6` |
+
+### Example: Red Theme
+
+To create a red-themed version, add this to your CSS:
+
+```css
+:root {
+  --primary: #dc2626;
+  --accent: #ef4444;
+  --accent-gradient: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
+}
+```
+
+## Assets
+
+To replace the logo and icons:
+1.  Replace `public/favicon.ico`.
+2.  Replace `public/icon.png` (if it exists).
+3.  Update `app/manifest.ts` if you have custom icon paths.
diff --git a/app/api/audio/[filename]/route.ts b/app/api/audio/[filename]/route.ts
index 6002d03..71c4c09 100644
--- a/app/api/audio/[filename]/route.ts
+++ b/app/api/audio/[filename]/route.ts
@@ -44,11 +44,35 @@ export async function GET(
             const stream = createReadStream(filePath, { start, end });
 
             // Convert Node stream to Web stream
+
             const readable = new ReadableStream({
                 start(controller) {
-                    stream.on('data', (chunk: any) => controller.enqueue(chunk));
-                    stream.on('end', () => controller.close());
-                    stream.on('error', (err: any) => controller.error(err));
+                    let isClosed = false;
+
+                    stream.on('data', (chunk: any) => {
+                        if (isClosed) return;
+                        try {
+                            controller.enqueue(chunk);
+                        } catch (e) {
+                            isClosed = true;
+                            stream.destroy();
+                        }
+                    });
+
+                    stream.on('end', () => {
+                        if (isClosed) return;
+                        isClosed = true;
+                        controller.close();
+                    });
+
+                    stream.on('error', (err: any) => {
+                        if (isClosed) return;
+                        isClosed = true;
+                        controller.error(err);
+                    });
+                },
+                cancel() {
+                    stream.destroy();
                 }
             });
 
@@ -68,9 +92,32 @@ export async function GET(
             // Convert Node stream to Web stream
             const readable = new ReadableStream({
                 start(controller) {
-                    stream.on('data', (chunk: any) => controller.enqueue(chunk));
-                    stream.on('end', () => controller.close());
-                    stream.on('error', (err: any) => controller.error(err));
+                    let isClosed = false;
+
+                    stream.on('data', (chunk: any) => {
+                        if (isClosed) return;
+                        try {
+                            controller.enqueue(chunk);
+                        } catch (e) {
+                            isClosed = true;
+                            stream.destroy();
+                        }
+                    });
+
+                    stream.on('end', () => {
+                        if (isClosed) return;
+                        isClosed = true;
+                        controller.close();
+                    });
+
+                    stream.on('error', (err: any) => {
+                        if (isClosed) return;
+                        isClosed = true;
+                        controller.error(err);
+                    });
+                },
+                cancel() {
+                    stream.destroy();
                 }
             });
 
diff --git a/app/globals.css b/app/globals.css
index c2f1704..709523a 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -2,6 +2,24 @@
   --foreground-rgb: 0, 0, 0;
   --background-start-rgb: 214, 219, 220;
   --background-end-rgb: 255, 255, 255;
+
+  /* Theme Colors */
+  --primary: #000000;
+  --primary-foreground: #ffffff;
+  --secondary: #4b5563;
+  --secondary-foreground: #ffffff;
+  --accent: #667eea;
+  --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  --success: #22c55e;
+  --success-foreground: #ffffff;
+  --danger: #ef4444;
+  --danger-foreground: #ffffff;
+  --warning: #ffc107;
+  --muted: #f3f4f6;
+  --muted-foreground: #6b7280;
+  --border: #e5e7eb;
+  --input: #d1d5db;
+  --ring: #000000;
 }
 
 body {
@@ -51,13 +69,13 @@ body {
   display: flex;
   justify-content: space-between;
   font-size: 0.875rem;
-  color: #666;
+  color: var(--muted-foreground);
   margin-bottom: 0.5rem;
 }
 
 /* Audio Player */
 .audio-player {
-  background: #f3f4f6;
+  background: var(--muted);
   padding: 1rem;
   border-radius: 0.5rem;
   box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
@@ -73,8 +91,8 @@ body {
   width: 3rem;
   height: 3rem;
   border-radius: 50%;
-  background: #000;
-  color: #fff;
+  background: var(--primary);
+  color: var(--primary-foreground);
   border: none;
   display: flex;
   align-items: center;
@@ -85,19 +103,20 @@ body {
 
 .play-button:hover {
   background: #333;
+  /* Keep for now or add --primary-hover */
 }
 
 .progress-bar-container {
   flex: 1;
   height: 0.5rem;
-  background: #d1d5db;
+  background: var(--input);
   border-radius: 999px;
   overflow: hidden;
 }
 
 .progress-bar {
   height: 100%;
-  background: #22c55e;
+  background: var(--success);
   transition: width 0.1s linear;
 }
 
@@ -114,7 +133,7 @@ body {
   gap: 0.5rem;
   padding: 0.5rem;
   background: #f9fafb;
-  border: 1px solid #e5e7eb;
+  border: 1px solid var(--border);
   border-radius: 0.25rem;
   font-size: 0.875rem;
 }
@@ -125,7 +144,7 @@ body {
 }
 
 .guess-text {
-  color: #ef4444;
+  color: var(--danger);
   /* Red for wrong */
 }
 
@@ -135,7 +154,7 @@ body {
 }
 
 .guess-text.correct {
-  color: #22c55e;
+  color: var(--success);
 }
 
 /* Input */
@@ -148,14 +167,14 @@ body {
 .guess-input {
   width: 100%;
   padding: 0.75rem;
-  border: 1px solid #d1d5db;
+  border: 1px solid var(--input);
   border-radius: 0.25rem;
   font-size: 1rem;
   box-sizing: border-box;
 }
 
 .guess-input:focus {
-  outline: 2px solid #000;
+  outline: 2px solid var(--ring);
   border-color: transparent;
 }
 
@@ -163,7 +182,7 @@ body {
   position: absolute;
   width: 100%;
   background: #fff;
-  border: 1px solid #d1d5db;
+  border: 1px solid var(--input);
   border-radius: 0.25rem;
   margin-top: 0.25rem;
   max-height: 15rem;
@@ -177,11 +196,11 @@ body {
 .suggestion-item {
   padding: 0.75rem;
   cursor: pointer;
-  border-bottom: 1px solid #f3f4f6;
+  border-bottom: 1px solid var(--muted);
 }
 
 .suggestion-item:hover {
-  background: #f3f4f6;
+  background: var(--muted);
 }
 
 .suggestion-title {
@@ -190,14 +209,14 @@ body {
 
 .suggestion-artist {
   font-size: 0.875rem;
-  color: #666;
+  color: var(--muted-foreground);
 }
 
 .skip-button {
   width: 100%;
   padding: 1rem 1.5rem;
   margin-top: 1rem;
-  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  background: var(--accent-gradient);
   color: white;
   border: none;
   border-radius: 0.5rem;
@@ -246,7 +265,7 @@ body {
 }
 
 .admin-card {
-  background: #f3f4f6;
+  background: var(--muted);
   padding: 2rem;
   border-radius: 0.5rem;
 }
@@ -265,14 +284,14 @@ body {
 .form-input {
   width: 100%;
   padding: 0.5rem;
-  border: 1px solid #d1d5db;
+  border: 1px solid var(--input);
   border-radius: 0.25rem;
   box-sizing: border-box;
 }
 
 .btn-primary {
-  background: #000;
-  color: #fff;
+  background: var(--primary);
+  color: var(--primary-foreground);
   padding: 0.5rem 1rem;
   border: none;
   border-radius: 0.25rem;
@@ -292,8 +311,8 @@ body {
 }
 
 .btn-secondary {
-  background: #4b5563;
-  color: #fff;
+  background: var(--secondary);
+  color: var(--secondary-foreground);
   padding: 0.5rem 1rem;
   border: none;
   border-radius: 0.25rem;
@@ -312,8 +331,8 @@ body {
 }
 
 .btn-danger {
-  background: #ef4444;
-  color: #fff;
+  background: var(--danger);
+  color: var(--danger-foreground);
   padding: 0.5rem 1rem;
   border: none;
   border-radius: 0.25rem;
@@ -337,8 +356,8 @@ body {
   padding: 2rem 1rem 1rem;
   text-align: center;
   font-size: 0.875rem;
-  color: #666;
-  border-top: 1px solid #e5e7eb;
+  color: var(--muted-foreground);
+  border-top: 1px solid var(--border);
   width: 100%;
 }
 
@@ -347,7 +366,7 @@ body {
 }
 
 .app-footer a {
-  color: #000;
+  color: var(--primary);
   text-decoration: none;
   font-weight: 500;
 }
@@ -375,7 +394,7 @@ body {
   font-size: 0.875rem;
   text-align: center;
   margin: 0 0 1rem 0;
-  color: #666;
+  color: var(--muted-foreground);
 }
 
 .statistics-grid {
@@ -391,7 +410,7 @@ body {
   padding: 0.75rem 0.5rem;
   background: rgba(255, 255, 255, 0.8);
   border-radius: 0.375rem;
-  border: 1px solid #e5e7eb;
+  border: 1px solid var(--border);
 }
 
 .stat-badge {
@@ -401,7 +420,7 @@ body {
 
 .stat-label {
   font-size: 0.75rem;
-  color: #666;
+  color: var(--muted-foreground);
   margin-bottom: 0.25rem;
   text-align: center;
 }
@@ -409,7 +428,7 @@ body {
 .stat-count {
   font-size: 1.25rem;
   font-weight: bold;
-  color: #000;
+  color: var(--primary);
 }
 
 /* Tooltip */
diff --git a/app/layout.tsx b/app/layout.tsx
index e33f83e..0b4990a 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -3,6 +3,8 @@ import { Geist, Geist_Mono } from "next/font/google";
 import Script from "next/script";
 import "./globals.css";
 
+import { config } from "@/lib/config";
+
 const geistSans = Geist({
   variable: "--font-geist-sans",
   subsets: ["latin"],
@@ -14,12 +16,12 @@ const geistMono = Geist_Mono({
 });
 
 export const metadata: Metadata = {
-  title: "Hördle",
-  description: "Daily music guessing game - Guess the song from short audio clips",
+  title: config.appName,
+  description: config.appDescription,
 };
 
 export const viewport: Viewport = {
-  themeColor: "#000000",
+  themeColor: config.colors.themeColor,
   width: "device-width",
   initialScale: 1,
   maximumScale: 1,
@@ -38,8 +40,8 @@ export default function RootLayout({
       <head>
         <Script
           defer
-          data-domain="hoerdle.elpatron.me"
-          src="https://plausible.elpatron.me/js/script.js"
+          data-domain={config.plausibleDomain}
+          src={config.plausibleScriptSrc}
           strategy="beforeInteractive"
         />
       </head>
diff --git a/app/manifest.ts b/app/manifest.ts
index 0c3af1d..31352f0 100644
--- a/app/manifest.ts
+++ b/app/manifest.ts
@@ -1,14 +1,15 @@
 import type { MetadataRoute } from 'next'
+import { config } from '@/lib/config'
 
 export default function manifest(): MetadataRoute.Manifest {
     return {
-        name: 'Hördle',
-        short_name: 'Hördle',
-        description: 'Daily music guessing game - Guess the song from short audio clips',
+        name: config.appName,
+        short_name: config.appName,
+        description: config.appDescription,
         start_url: '/',
         display: 'standalone',
-        background_color: '#ffffff',
-        theme_color: '#000000',
+        background_color: config.colors.backgroundColor,
+        theme_color: config.colors.themeColor,
         icons: [
             {
                 src: '/favicon.ico',
diff --git a/components/AppFooter.tsx b/components/AppFooter.tsx
index 1f388e2..65b5a4d 100644
--- a/components/AppFooter.tsx
+++ b/components/AppFooter.tsx
@@ -1,5 +1,6 @@
 'use client';
 
+import { config } from '@/lib/config';
 import { useEffect, useState } from 'react';
 
 export default function AppFooter() {
@@ -12,14 +13,15 @@ export default function AppFooter() {
             .catch(() => setVersion(''));
     }, []);
 
+    if (!config.credits.enabled) return null;
+
     return (
         <footer className="app-footer">
             <p>
-                Vibe coded with ☕ and 🍺 by{' '}
-                <a href="https://digitalcourage.social/@elpatron" target="_blank" rel="noopener noreferrer">
-                    @elpatron@digitalcourage.social
+                {config.credits.text}{' '}
+                <a href={config.credits.linkUrl} target="_blank" rel="noopener noreferrer">
+                    {config.credits.linkText}
                 </a>
-                {' '}- prototype for personal use among friends only!
                 {version && (
                     <>
                         {' '}·{' '}
diff --git a/components/Game.tsx b/components/Game.tsx
index 22598ea..ac891c2 100644
--- a/components/Game.tsx
+++ b/components/Game.tsx
@@ -1,5 +1,6 @@
 'use client';
 
+import { config } from '@/lib/config';
 import { useEffect, useState, useRef } from 'react';
 import AudioPlayer, { AudioPlayerRef } from './AudioPlayer';
 import GuessInput from './GuessInput';
@@ -83,7 +84,7 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
 
     useEffect(() => {
         if (dailyPuzzle) {
-            const ratedPuzzles = JSON.parse(localStorage.getItem('hoerdle_rated_puzzles') || '[]');
+            const ratedPuzzles = JSON.parse(localStorage.getItem(`${config.appName.toLowerCase()}_rated_puzzles`) || '[]');
             if (ratedPuzzles.includes(dailyPuzzle.id)) {
                 setHasRated(true);
             } else {
@@ -269,7 +270,7 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
         const bonusStar = (hasWon && gameState.yearGuessed && dailyPuzzle.releaseYear && gameState.scoreBreakdown.some(item => item.reason === 'Bonus: Correct Year')) ? '⭐' : '';
         const genreText = genre ? `${isSpecial ? 'Special' : 'Genre'}: ${genre}\n` : '';
 
-        let shareUrl = 'https://hoerdle.elpatron.me';
+        let shareUrl = `https://${config.domain}`;
         if (genre) {
             if (isSpecial) {
                 shareUrl += `/special/${encodeURIComponent(genre)}`;
@@ -278,7 +279,7 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
             }
         }
 
-        const text = `Hördle #${dailyPuzzle.puzzleNumber}\n${genreText}\n${speaker}${emojiGrid}${bonusStar}\nScore: ${gameState.score}\n\n#Hördle #Music\n\n${shareUrl}`;
+        const text = `${config.appName} #${dailyPuzzle.puzzleNumber}\n${genreText}\n${speaker}${emojiGrid}${bonusStar}\nScore: ${gameState.score}\n\n#${config.appName} #Music\n\n${shareUrl}`;
 
         const isMobile = /iPhone|iPad|iPod|Android/i.test(navigator.userAgent);
 
@@ -316,10 +317,10 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
             await submitRating(dailyPuzzle.songId, rating, genre, isSpecial, dailyPuzzle.puzzleNumber);
             setHasRated(true);
 
-            const ratedPuzzles = JSON.parse(localStorage.getItem('hoerdle_rated_puzzles') || '[]');
+            const ratedPuzzles = JSON.parse(localStorage.getItem(`${config.appName.toLowerCase()}_rated_puzzles`) || '[]');
             if (!ratedPuzzles.includes(dailyPuzzle.id)) {
                 ratedPuzzles.push(dailyPuzzle.id);
-                localStorage.setItem('hoerdle_rated_puzzles', JSON.stringify(ratedPuzzles));
+                localStorage.setItem(`${config.appName.toLowerCase()}_rated_puzzles`, JSON.stringify(ratedPuzzles));
             }
         } catch (error) {
             console.error('Failed to submit rating', error);
@@ -329,8 +330,8 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
     return (
         <div className="container">
             <header className="header">
-                <h1 id="tour-title" className="title">Hördle #{dailyPuzzle.puzzleNumber}{genre ? ` / ${genre}` : ''}</h1>
-                <div style={{ fontSize: '0.9rem', color: '#666', marginTop: '0.5rem', marginBottom: '1rem' }}>
+                <h1 id="tour-title" className="title">{config.appName} #{dailyPuzzle.puzzleNumber}{genre ? ` / ${genre}` : ''}</h1>
+                <div style={{ fontSize: '0.9rem', color: 'var(--muted-foreground)', marginTop: '0.5rem', marginBottom: '1rem' }}>
                     Next puzzle in: {timeUntilNext}
                 </div>
             </header>
@@ -410,11 +411,11 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
                             {hasWon ? 'You won!' : 'Game Over'}
                         </h2>
 
-                        <div style={{ fontSize: '2rem', fontWeight: 'bold', margin: '1rem 0', color: hasWon ? '#059669' : '#dc2626' }}>
+                        <div style={{ fontSize: '2rem', fontWeight: 'bold', margin: '1rem 0', color: hasWon ? 'var(--success)' : 'var(--danger)' }}>
                             Score: {gameState.score}
                         </div>
 
-                        <details style={{ marginBottom: '1rem', cursor: 'pointer', fontSize: '0.9rem', color: '#666' }}>
+                        <details style={{ marginBottom: '1rem', cursor: 'pointer', fontSize: '0.9rem', color: 'var(--muted-foreground)' }}>
                             <summary>Score Breakdown</summary>
                             <ul style={{ listStyle: 'none', padding: '0.5rem', textAlign: 'left', background: 'rgba(255,255,255,0.5)', borderRadius: '0.5rem', marginTop: '0.5rem' }}>
                                 {gameState.scoreBreakdown.map((item, i) => (
@@ -437,9 +438,9 @@ export default function Game({ dailyPuzzle, genre = null, isSpecial = false, max
                                 style={{ width: '150px', height: '150px', objectFit: 'cover', borderRadius: '0.5rem', marginBottom: '1rem', boxShadow: '0 4px 6px rgba(0,0,0,0.1)' }}
                             />
                             <h3 style={{ fontSize: '1.125rem', fontWeight: 'bold', margin: '0 0 0.5rem 0' }}>{dailyPuzzle.title}</h3>
-                            <p style={{ fontSize: '0.875rem', color: '#666', margin: '0 0 0.5rem 0' }}>{dailyPuzzle.artist}</p>
+                            <p style={{ fontSize: '0.875rem', color: 'var(--muted-foreground)', margin: '0 0 0.5rem 0' }}>{dailyPuzzle.artist}</p>
                             {dailyPuzzle.releaseYear && gameState.yearGuessed && (
-                                <p style={{ fontSize: '0.875rem', color: '#666', margin: '0 0 1rem 0' }}>Released: {dailyPuzzle.releaseYear}</p>
+                                <p style={{ fontSize: '0.875rem', color: 'var(--muted-foreground)', margin: '0 0 1rem 0' }}>Released: {dailyPuzzle.releaseYear}</p>
                             )}
                             <audio controls style={{ width: '100%' }}>
                                 <source src={dailyPuzzle.audioUrl} type="audio/mpeg" />
@@ -490,13 +491,13 @@ function ScoreDisplay({ score, breakdown }: { score: number, breakdown: Array<{
             textAlign: 'center',
             margin: '0.5rem 0',
             padding: '0.5rem',
-            background: '#f3f4f6',
+            background: 'var(--muted)',
             borderRadius: '0.5rem',
             fontSize: '0.9rem',
             fontFamily: 'monospace',
             cursor: 'help'
         }}>
-            <span style={{ color: '#666' }}>{expression} = </span>
+            <span style={{ color: 'var(--muted-foreground)' }}>{expression} = </span>
             <span style={{ fontWeight: 'bold', color: 'var(--primary)', fontSize: '1.1rem' }}>{score}</span>
         </div>
     );
@@ -576,8 +577,8 @@ function YearGuessModal({ correctYear, onGuess, onSkip }: { correctYear: number,
             }}>
                 {!feedback.show ? (
                     <>
-                        <h3 style={{ fontSize: '1.5rem', fontWeight: 'bold', marginBottom: '0.5rem', color: '#1f2937' }}>Bonus Round!</h3>
-                        <p style={{ marginBottom: '1.5rem', color: '#4b5563' }}>Guess the release year for <strong style={{ color: '#10b981' }}>+10 points</strong>!</p>
+                        <h3 style={{ fontSize: '1.5rem', fontWeight: 'bold', marginBottom: '0.5rem', color: 'var(--primary)' }}>Bonus Round!</h3>
+                        <p style={{ marginBottom: '1.5rem', color: 'var(--secondary)' }}>Guess the release year for <strong style={{ color: 'var(--success)' }}>+10 points</strong>!</p>
 
                         <div style={{
                             display: 'grid',
@@ -591,17 +592,17 @@ function YearGuessModal({ correctYear, onGuess, onSkip }: { correctYear: number,
                                     onClick={() => handleGuess(year)}
                                     style={{
                                         padding: '0.75rem',
-                                        background: '#f3f4f6',
-                                        border: '2px solid #e5e7eb',
+                                        background: 'var(--muted)',
+                                        border: '2px solid var(--border)',
                                         borderRadius: '0.5rem',
                                         fontSize: '1.1rem',
                                         fontWeight: 'bold',
-                                        color: '#374151',
+                                        color: 'var(--secondary)',
                                         cursor: 'pointer',
                                         transition: 'all 0.2s'
                                     }}
-                                    onMouseOver={e => e.currentTarget.style.borderColor = '#10b981'}
-                                    onMouseOut={e => e.currentTarget.style.borderColor = '#e5e7eb'}
+                                    onMouseOver={e => e.currentTarget.style.borderColor = 'var(--success)'}
+                                    onMouseOut={e => e.currentTarget.style.borderColor = 'var(--border)'}
                                 >
                                     {year}
                                 </button>
@@ -613,7 +614,7 @@ function YearGuessModal({ correctYear, onGuess, onSkip }: { correctYear: number,
                             style={{
                                 background: 'none',
                                 border: 'none',
-                                color: '#6b7280',
+                                color: 'var(--muted-foreground)',
                                 textDecoration: 'underline',
                                 cursor: 'pointer',
                                 fontSize: '0.9rem'
@@ -628,23 +629,23 @@ function YearGuessModal({ correctYear, onGuess, onSkip }: { correctYear: number,
                             feedback.correct ? (
                                 <>
                                     <div style={{ fontSize: '4rem', marginBottom: '1rem' }}>🎉</div>
-                                    <h3 style={{ fontSize: '2rem', fontWeight: 'bold', color: '#10b981', marginBottom: '0.5rem' }}>Correct!</h3>
-                                    <p style={{ fontSize: '1.2rem', color: '#4b5563' }}>Released in {correctYear}</p>
-                                    <p style={{ fontSize: '1.5rem', fontWeight: 'bold', color: '#10b981', marginTop: '1rem' }}>+10 Points!</p>
+                                    <h3 style={{ fontSize: '2rem', fontWeight: 'bold', color: 'var(--success)', marginBottom: '0.5rem' }}>Correct!</h3>
+                                    <p style={{ fontSize: '1.2rem', color: 'var(--secondary)' }}>Released in {correctYear}</p>
+                                    <p style={{ fontSize: '1.5rem', fontWeight: 'bold', color: 'var(--success)', marginTop: '1rem' }}>+10 Points!</p>
                                 </>
                             ) : (
                                 <>
                                     <div style={{ fontSize: '4rem', marginBottom: '1rem' }}>😕</div>
-                                    <h3 style={{ fontSize: '2rem', fontWeight: 'bold', color: '#ef4444', marginBottom: '0.5rem' }}>Not quite!</h3>
-                                    <p style={{ fontSize: '1.2rem', color: '#4b5563' }}>You guessed {feedback.guessedYear}</p>
-                                    <p style={{ fontSize: '1.2rem', color: '#4b5563', marginTop: '0.5rem' }}>Actually released in <strong>{correctYear}</strong></p>
+                                    <h3 style={{ fontSize: '2rem', fontWeight: 'bold', color: 'var(--danger)', marginBottom: '0.5rem' }}>Not quite!</h3>
+                                    <p style={{ fontSize: '1.2rem', color: 'var(--secondary)' }}>You guessed {feedback.guessedYear}</p>
+                                    <p style={{ fontSize: '1.2rem', color: 'var(--secondary)', marginTop: '0.5rem' }}>Actually released in <strong>{correctYear}</strong></p>
                                 </>
                             )
                         ) : (
                             <>
                                 <div style={{ fontSize: '4rem', marginBottom: '1rem' }}>⏭️</div>
-                                <h3 style={{ fontSize: '2rem', fontWeight: 'bold', color: '#6b7280', marginBottom: '0.5rem' }}>Skipped</h3>
-                                <p style={{ fontSize: '1.2rem', color: '#4b5563' }}>Released in {correctYear}</p>
+                                <h3 style={{ fontSize: '2rem', fontWeight: 'bold', color: 'var(--muted-foreground)', marginBottom: '0.5rem' }}>Skipped</h3>
+                                <p style={{ fontSize: '1.2rem', color: 'var(--secondary)' }}>Released in {correctYear}</p>
                             </>
                         )}
                     </div>
@@ -659,12 +660,12 @@ function StarRating({ onRate, hasRated }: { onRate: (rating: number) => void, ha
     const [rating, setRating] = useState(0);
 
     if (hasRated) {
-        return <div style={{ color: '#666', fontStyle: 'italic' }}>Thanks for rating!</div>;
+        return <div style={{ color: 'var(--muted-foreground)', fontStyle: 'italic' }}>Thanks for rating!</div>;
     }
 
     return (
         <div className="star-rating" style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', gap: '0.5rem' }}>
-            <span style={{ fontSize: '0.875rem', color: '#666', fontWeight: '500' }}>Rate this puzzle:</span>
+            <span style={{ fontSize: '0.875rem', color: 'var(--muted-foreground)', fontWeight: '500' }}>Rate this puzzle:</span>
             <div style={{ display: 'flex', gap: '0.25rem', justifyContent: 'center' }}>
                 {[...Array(5)].map((_, index) => {
                     const ratingValue = index + 1;
@@ -677,7 +678,7 @@ function StarRating({ onRate, hasRated }: { onRate: (rating: number) => void, ha
                                 border: 'none',
                                 cursor: 'pointer',
                                 fontSize: '2rem',
-                                color: ratingValue <= (hover || rating) ? '#ffc107' : '#9ca3af',
+                                color: ratingValue <= (hover || rating) ? 'var(--warning)' : 'var(--muted-foreground)',
                                 transition: 'color 0.2s',
                                 padding: '0 0.25rem'
                             }}
diff --git a/lib/config.ts b/lib/config.ts
new file mode 100644
index 0000000..688170e
--- /dev/null
+++ b/lib/config.ts
@@ -0,0 +1,18 @@
+export const config = {
+    appName: process.env.NEXT_PUBLIC_APP_NAME || 'Hördle',
+    appDescription: process.env.NEXT_PUBLIC_APP_DESCRIPTION || 'Daily music guessing game - Guess the song from short audio clips',
+    domain: process.env.NEXT_PUBLIC_DOMAIN || 'hoerdle.elpatron.me',
+    twitterHandle: process.env.NEXT_PUBLIC_TWITTER_HANDLE || '@elpatron',
+    plausibleDomain: process.env.NEXT_PUBLIC_PLAUSIBLE_DOMAIN || 'hoerdle.elpatron.me',
+    plausibleScriptSrc: process.env.NEXT_PUBLIC_PLAUSIBLE_SCRIPT_SRC || 'https://plausible.elpatron.me/js/script.js',
+    colors: {
+        themeColor: process.env.NEXT_PUBLIC_THEME_COLOR || '#000000',
+        backgroundColor: process.env.NEXT_PUBLIC_BACKGROUND_COLOR || '#ffffff',
+    },
+    credits: {
+        enabled: process.env.NEXT_PUBLIC_CREDITS_ENABLED !== 'false',
+        text: process.env.NEXT_PUBLIC_CREDITS_TEXT || 'Vibe coded with ☕ and 🍺 by',
+        linkText: process.env.NEXT_PUBLIC_CREDITS_LINK_TEXT || '@elpatron@digitalcourage.social',
+        linkUrl: process.env.NEXT_PUBLIC_CREDITS_LINK_URL || 'https://digitalcourage.social/@elpatron',
+    }
+};