fixed css minification implementation

src/index.js

@@ -30,14 +30,14 @@ export default (options = {}) => {
     const minifyCSS = (content) => {
         content = content.replace(/\/\*(?:(?!\*\/)[\s\S])*\*\/|[\r\n\t]+/g, ""); // Remove comments and newlines
         content = content.replace(/ {2,}/g, " "); // Replace multiple spaces with one
-        content = content.replace(/ ([{:}]) /g, "$1"); // Remove space around braces and colons
-        content = content.replace(/([{:}])\s+/g, "$1"); // Remove space after { and other braces
-        content = content.replace(/(:)(?!\s)/g, "$1 "); // Ensure a space after colon in property declarations
-        content = content.replace(/([;,]) /g, "$1"); // Remove space after semicolons and commas
-        content = content.replace(/ !/g, "!"); // Remove space before !
+        content = content.replace(/\[([^\]]*?)\]/g, (match, p1) => `[${p1.replace(/\s*:\s*/g, ": ").replace(/\s*([=<>^$|~])\s*/g, "$1").trim()}]`); // Preserve spaces inside attribute selectors (inside [])
+        content = content.replace(/\s*([{};])\s*/g, "$1"); // Remove spaces around `{`, `}`, and `;`
+        content = content.replace(/([a-zA-Z0-9_-])\s*(:[a-zA-Z])/g, "$1 $2"); // Add space before pseudo-classes
+        content = content.replace(/([a-zA-Z0-9_-]+):\s*([^;"{}]+(?:;|$))/g, "$1:$2"); // Remove spaces in property declarations
         return content;
     };
 
+
     return {
         name: "import-css",