Updates tailwindcss and postcss

Author: vtamara

packages/react-app/package.json

@@ -12,6 +12,7 @@
     "@headlessui/react": "^2.2.0",
     "@heroicons/react": "^2.2.0",
     "@rainbow-me/rainbowkit": "^2.2.4",
+    "@tailwindcss/postcss": "^4.0.14",
     "@tanstack/react-query": "^5.69.0",
     "@wagmi/connectors": "^5.7.11",
     "@wagmi/core": "^2.16.7",
@@ -31,8 +32,8 @@
     "autoprefixer": "^10.4.21",
     "eslint": "^9.22.0",
     "eslint-config-next": "^15.2.3",
-    "postcss": "^8.4.47",
-    "tailwindcss": "^3.4.14",
+    "postcss": "^8.5.3",
+    "tailwindcss": "^4.0.14",
     "typescript": "^5.8.2"
   },
   "resolutions": {

packages/react-app/postcss.config.js

@@ -0,0 +1,6 @@
+export default {
+  plugins: {
+    "@tailwindcss/postcss": {},
+    autoprefixer: {},
+  }
+}

packages/react-app/postcss.config.mjs

@@ -1,3 +1 @@
-@tailwind base;
-@tailwind components;
-@tailwind utilities;
+@import "tailwindcss";