Downgrade to Tailwind v3 for shadcn compatibility

package.json

@@ -25,7 +25,6 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",
-    "@tailwindcss/postcss": "^4.1.18",
     "@types/node": "^24.10.9",
     "@types/react": "^19.2.5",
     "@types/react-dom": "^19.2.3",
@@ -36,7 +35,7 @@
     "eslint-plugin-react-refresh": "^0.4.24",
     "globals": "^16.5.0",
     "postcss": "^8.5.6",
-    "tailwindcss": "^4.1.18",
+    "tailwindcss": "^3.4.17",
     "typescript": "~5.9.3",
     "typescript-eslint": "^8.46.4",
     "vite": "^7.2.4"

postcss.config.js

@@ -1,6 +1,6 @@
 export default {
   plugins: {
-    '@tailwindcss/postcss': {},
+    tailwindcss: {},
     autoprefixer: {},
   },
 }