need at-rules and rule-list

Author: andreamah

grammars/css.cson

@@ -1698,9 +1698,9 @@
       {
         'include': '#font-features'
       }
-      {
-        'include': '#selector'
-      }
+      {'include':'selector'}
+      {'include':'at-rules'}
+      {'include':'rule-list'}
       {
         # Custom properties
         'match': '''(?x) (?<![\\w-])

testingUtil/source.css

@@ -1,13 +1,22 @@
+/* add test code here */
+
 body {
     font-family: Arial, sans-serif;
     margin: 0;
     padding: 0;
     background-color: #f0f0f0;
 
-    @media (min-width:400px) {
-        font-family: Arial, sans-serif;
-        margin: 0;
-        padding: 0;
-        background-color: #f0f0f0;
+    @media (min-width:400px) {}
+
+    a {
+        color: red;
+
+        b {
+            color: blue
+        }
     }
-}
+
+}
+
+
+@media (min-width:400px) {}