@@ 461,6 461,8 @@ define : guess-mime-type  path
           . 'application/octet-stream
         : string-suffix? ".m3u" path
           . 'application/x-mpegurl
+        : string-suffix? ".css" path
+          . 'text/css
         : and (equal? mime-type 'text/plain) (string-suffix? ".js" path)
           . 'application/javascript
         : equal? mime-type 'video/x-matroska

          
@@ 469,7 471,7 @@ define : guess-mime-type  path
 
 define : charset mime-type 
     cond
-        : member mime-type '(text/html text/plain application/x-mpegurl)
+        : member mime-type '(text/html text/css text/plain application/x-mpegurl)
             . "UTF-8"
         else "ISO-8859-1"