diff --git a/scripts/remove-cdn-for-vercel.js b/scripts/remove-cdn-for-vercel.js
new file mode 100644
index 0000000..b31d574
--- /dev/null
+++ b/scripts/remove-cdn-for-vercel.js
@@ -0,0 +1,76 @@
+/**
+ * Script exécuté AVANT le build sur Vercel (via prebuild)
+ * 1. Installe @tailwindcss/postcss pour Vercel
+ * 2. Supprime le code CDN Tailwind pour éviter le double-chargement
+ */
+
+const fs = require('fs');
+const path = require('path');
+const { execSync } = require('child_process');
+
+console.log('\n🔧 [PREBUILD] Starting Vercel preparation script...');
+console.log('📋 Environment:', {
+  VERCEL: process.env.VERCEL,
+  NEXT_PUBLIC_VERCEL: process.env.NEXT_PUBLIC_VERCEL,
+  NODE_ENV: process.env.NODE_ENV
+});
+
+// Seulement sur Vercel
+if (process.env.VERCEL === '1' || process.env.NEXT_PUBLIC_VERCEL === '1') {
+  console.log('✅ Running on Vercel - preparing for build...\n');
+
+  // Install Tailwind CSS v4 for Vercel build (per official docs)
+  console.log('📦 Installing Tailwind CSS v4 packages...');
+  try {
+    // Per https://tailwindcss.com/docs/installation/framework-guides
+    // Need to install: tailwindcss @tailwindcss/postcss postcss
+    execSync('npm install tailwindcss @tailwindcss/postcss postcss --legacy-peer-deps', {
+      stdio: 'inherit'
+    });
+    console.log('✅ Tailwind CSS v4 installed with lightningcss bindings\n');
+  } catch (error) {
+    console.error('❌ Failed to install Tailwind CSS:', error.message);
+    process.exit(1);
+  }
+
+  // Remove CDN loader
+  console.log('🗑️  Removing Tailwind CDN loader...');
+
+  const loaderPath = path.join(__dirname, '..', 'components', 'tailwind-cdn-loader.tsx');
+  console.log('📂 Replacing file:', loaderPath);
+
+  // Remplacer complètement le fichier par un composant vide
+  const emptyComponent = `'use client'
+
+/**
+ * Tailwind CSS v4 Loader (Vercel Build)
+ *
+ * This file was emptied by prebuild script (scripts/remove-cdn-for-vercel.js)
+ * On Vercel, Tailwind v4 is compiled via lightningcss (no CDN needed)
+ */
+export function TailwindCDNLoader() {
+  return null;
+}
+`;
+
+  try {
+    const originalContent = fs.readFileSync(loaderPath, 'utf-8');
+    const originalSize = originalContent.length;
+
+    fs.writeFileSync(loaderPath, emptyComponent);
+    const newSize = emptyComponent.length;
+
+    console.log('\n📊 Results:');
+    console.log('   - Original size:', originalSize, 'bytes');
+    console.log('   - New size:', newSize, 'bytes');
+    console.log('   - Removed:', originalSize - newSize, 'bytes');
+    console.log('\n✅ SUCCESS! CDN code removed from tailwind-cdn-loader.tsx');
+    console.log('🚀 Vercel build will use compiled Tailwind v4 (no CDN)\n');
+  } catch (error) {
+    console.log('\n❌ ERROR:', error.message);
+    console.log('   Build will continue but CDN might be present\n');
+  }
+} else {
+  console.log('⏭️  Not on Vercel - skipping CDN removal');
+  console.log('   (CDN will be used for CodeSandbox development)\n');
+}