feat: migrate tailwind config to v4

Author: kubosho

main.css

@@ -0,0 +1,49 @@
+@import "tailwindcss";
+
+@theme {
+	--color-blue-100: #0086ed;
+	--color-blue-200: #0076d1;
+	--color-blue-300: #0067b5;
+	--color-blue-400: #005799;
+	--color-blue-500: #00477d;
+	--color-blue-600: #003760;
+	--color-blue-700: #002745;
+	--color-blue-800: #001729;
+
+	--color-beige-100: #ebe8ce;
+	--color-beige-200: #d1cfb8;
+	--color-beige-300: #b8b5a2;
+	--color-beige-400: #9e9c8b;
+	--color-beige-500: #858475;
+	--color-beige-600: #69675c;
+	--color-beige-700: #4a4940;
+	--color-beige-800: #2b2b27;
+
+	--color-yellow-100: #f0e800;
+	--color-yellow-200: #d4cd00;
+	--color-yellow-300: #b8b100;
+	--color-yellow-400: #9c9600;
+	--color-yellow-500: #807b00;
+	--color-yellow-600: #636000;
+	--color-yellow-700: #474500;
+	--color-yellow-800: #2b2a00;
+
+	--color-monotone-100: #fafafa;
+	--color-monotone-200: #d6d6d6;
+	--color-monotone-300: #bababa;
+	--color-monotone-400: #9e9e9e;
+	--color-monotone-500: #828282;
+	--color-monotone-600: #636363;
+	--color-monotone-700: #474747;
+	--color-monotone-800: #1a1a1a;
+
+	--color-primary-main: #003760;
+	--color-primary-sub: #858475;
+	--color-primary-accent: #d4cd00;
+
+	--color-neutral-background: #fafafa;
+	--color-neutral-text-main: #1a1a1a;
+	--color-neutral-text-sub: #636363;
+	--color-neutral-link: #0076d1;
+	--color-neutral-border: #9e9e9e;
+}

package-lock.json

@@ -6,10 +6,10 @@
   "publishConfig": {
     "access": "public"
   },
+  "main": "main.css",
   "files": [
     "CHANGELOG.md",
-    "docs/**/*",
-    "tailwind.config.js"
+    "docs/**/*"
   ],
   "scripts": {
     "check-typescript": "tsc --noEmit",
@@ -40,7 +40,6 @@
     "@tailwindcss/postcss": "4.1.16",
     "@types/react": "19.2.2",
     "@types/react-dom": "19.2.2",
-    "autoprefixer": "10.4.21",
     "conventional-changelog-conventionalcommits": "9.1.0",
     "eslint": "9.39.1",
     "eslint-config-prettier": "10.1.8",

package.json

@@ -1,6 +1,5 @@
 export default {
   plugins: {
     "@tailwindcss/postcss": {},
-    autoprefixer: {},
   },
 };