diff --git a/scripts/remove-cdn-for-vercel.js b/scripts/remove-cdn-for-vercel.js
new file mode 100644
index 0000000..b44488c
--- /dev/null
+++ b/scripts/remove-cdn-for-vercel.js
@@ -0,0 +1,84 @@
+/**
+ * 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");
+}