tailwind, complete overhaul. remove dead code, clean strcut

package.json

@@ -8,9 +8,12 @@
     "lint": "vue-cli-service lint"
   },
   "dependencies": {
+    "@tailwindcss/postcss": "^4.1.18",
     "axios": "^1.12.0",
     "core-js": "^3.8.3",
     "pinia": "^2.1.0",
+    "postcss": "^8.5.6",
+    "tailwindcss": "^4.1.18",
     "vue": "^3.2.13",
     "vue-router": "^4.5.0"
   },
@@ -43,4 +46,4 @@
     "not dead",
     "not ie 11"
   ]
-}
+}