python implementation

docs/CHANGES

@@ -1,5 +1,8 @@
 Changes with version
 
+ *) Added support for the following grouping @-rules:
+    @supports, @document, @keyframes
+
  *) Added support for Python 3.4 and Jython 2.7
 
 

rcssmin.py

@@ -190,7 +190,12 @@ def _make_cssmin(python_only=False):
                 r'%(uri_nl_strings)s'
                 r'|%(uri)s'
             r')%(spacechar)s*\)'
-        r'|(@[mM][eE][dD][iI][aA])(?!%(nmchar)s)'
+        r'|(@(?:'
+              r'[mM][eE][dD][iI][aA]'
+              r'|[sS][uU][pP][pP][oO][rR][tT][sS]'
+              r'|[kK][eE][yY][fF][rR][aA][mM][eE][sS]'
+              r'|[dD][oO][cC][uU][mM][eE][nN][tT]'
+            r'))(?!%(nmchar)s)'
         r'|(%(ie7hack)s)(%(space)s*)'
         r'|(:[fF][iI][rR][sS][tT]-[lL]'
             r'(?:[iI][nN][eE]|[eE][tT][tT][eE][rR]))'