update

node_modules/csso/lib/restructure/4-restructShorthand.js

@@ -78,7 +78,7 @@ function TRBL(name) {
 TRBL.prototype.getValueSequence = function(declaration, count) {
     var values = [];
     var iehack = '';
-    var hasBadValues = declaration.value.children.some(function(child) {
+    var hasBadValues = declaration.value.type !== 'Value' || declaration.value.children.some(function(child) {
         var special = false;
 
         switch (child.type) {
@@ -115,12 +115,16 @@ TRBL.prototype.getValueSequence = function(declaration, count) {
                 }
                 break;
 
-            case 'HexColor': // color
+            case 'Hash': // color
             case 'Number':
             case 'Percentage':
                 break;
 
             case 'Function':
+                if (child.name === 'var') {
+                    return true;
+                }
+
                 special = child.name;
                 break;
 

node_modules/csso/lib/restructure/6-restructBlock.js

@@ -14,17 +14,21 @@ var DONT_MIX_VALUE = {
     'text-align': /^(start|end|match-parent|justify-all)$/i
 };
 
-var CURSOR_SAFE_VALUE = [
-    'auto', 'crosshair', 'default', 'move', 'text', 'wait', 'help',
-    'n-resize', 'e-resize', 's-resize', 'w-resize',
-    'ne-resize', 'nw-resize', 'se-resize', 'sw-resize',
-    'pointer', 'progress', 'not-allowed', 'no-drop', 'vertical-text', 'all-scroll',
-    'col-resize', 'row-resize'
-];
-
-var POSITION_SAFE_VALUE = [
-    'static', 'relative', 'absolute', 'fixed'
-];
+var SAFE_VALUES = {
+    cursor: [
+        'auto', 'crosshair', 'default', 'move', 'text', 'wait', 'help',
+        'n-resize', 'e-resize', 's-resize', 'w-resize',
+        'ne-resize', 'nw-resize', 'se-resize', 'sw-resize',
+        'pointer', 'progress', 'not-allowed', 'no-drop', 'vertical-text', 'all-scroll',
+        'col-resize', 'row-resize'
+    ],
+    overflow: [
+        'hidden', 'visible', 'scroll', 'auto'
+    ],
+    position: [
+        'static', 'relative', 'absolute', 'fixed'
+    ]
+};
 
 var NEEDLESS_TABLE = {
     'border-width': ['border'],
@@ -105,12 +109,8 @@ function getPropertyFingerprint(propertyName, declaration, fingerprints) {
                                 iehack = RegExp.lastMatch;
                             }
 
-                            if (realName === 'cursor') {
-                                if (CURSOR_SAFE_VALUE.indexOf(name) === -1) {
-                                    special[name] = true;
-                                }
-                            } else if (realName === 'position') {
-                                if (POSITION_SAFE_VALUE.indexOf(name) === -1) {
+                            if (SAFE_VALUES.hasOwnProperty(realName)) {
+                                if (SAFE_VALUES[realName].indexOf(name) === -1) {
                                     special[name] = true;
                                 }
                             } else if (DONT_MIX_VALUE.hasOwnProperty(realName)) {

node_modules/csso/lib/restructure/prepare/processSelector.js

@@ -44,7 +44,7 @@ module.exports = function freeze(node, usageData) {
                     var name = node.name.toLowerCase();
 
                     if (!nonFreezePseudoClasses.hasOwnProperty(name)) {
-                        pseudos[name] = true;
+                        pseudos[':' + name] = true;
                         hasPseudo = true;
                     }
                     break;
@@ -53,7 +53,7 @@ module.exports = function freeze(node, usageData) {
                     var name = node.name.toLowerCase();
 
                     if (!nonFreezePseudoElements.hasOwnProperty(name)) {
-                        pseudos[name] = true;
+                        pseudos['::' + name] = true;
                         hasPseudo = true;
                     }
                     break;