Fix

Author: JustDeveloper1

src/modules/ast/css.js

@@ -112,7 +112,7 @@ exports.JSON = function(cssText) {
 
       skipWhitespace();
 
-      if (/^[.#a-zA-Z0-9\-\s,:]+$/.test(selectorText)) {
+      if (/^[.#a-zA-Z0-9\-\s,:()]+$/.test(selectorText)) {
         const selectors = selectorText.split(',').map(s => s.trim());
         const properties = {};
         const nestedRules = [];