chore: update tailwind to latest, remove redundant nesting plugin, and cleanup theme variables

package.json

@@ -14,14 +14,13 @@
     "build": "NODE_ENV=production postcss ./assets/css/tailwind.css -o ./assets/built/screen.css"
   },
   "devDependencies": {
-    "@tailwindcss/nesting": "0.0.0-insiders.565cd3e",
-    "@tailwindcss/postcss": "^4.0.0-alpha.13",
+    "@tailwindcss/postcss": "^4.2.0",
     "@tailwindcss/typography": "^0.5.19",
     "autoprefixer": "^10.4.17",
     "cssnano": "^6.0.5",
     "postcss": "^8.4.35",
     "postcss-cli": "^11.0.0",
-    "tailwindcss": "^4.0.0-alpha.13"
+    "tailwindcss": "^4.2.0"
   },
   "config": {
     "posts_per_page": 12