diff --git a/django/contrib/admin/media/css/layout.css b/django/contrib/admin/media/css/layout.css
index c8eb42650f..befe4fc1ca 100644
--- a/django/contrib/admin/media/css/layout.css
+++ b/django/contrib/admin/media/css/layout.css
@@ -3,13 +3,13 @@
 #content { margin:10px 15px; }
 #header { width:100%; }
 #content-main { float:left; width:100%; }
-#content-related { float:right; width:220px; position:relative; margin-right:-230px; }
+#content-related { float:right; width:18em; position:relative; margin-right:-19em; }
 #footer	{ clear:both; padding:10px; }
 
 /*  COLUMN TYPES  */
-.colMS { margin-right:245px !important; }
-.colSM { margin-left:245px !important; }
-.colSM #content-related { float:left; margin-right:0; margin-left:-230px; }
+.colMS { margin-right:20em !important; }
+.colSM { margin-left:20em !important; }
+.colSM #content-related { float:left; margin-right:0; margin-left:-19em; }
 .colSM #content-main { float:right; }
 .popup .colM { width:95%; }
 .subcol { float:left; width:46%; margin-right:15px; }