diff --git a/trac/htdocs/main.css b/trac/htdocs/main.css
index 95c7758..e6f998a 100644
--- a/trac/htdocs/main.css
+++ b/trac/htdocs/main.css
@@ -111,3 +111,7 @@ select, input[type="text"], input.textwidget, textarea {
 dt em { 
     color: #88AA77;
 }
+.buttons {
+    margin:0.5em 0;
+    text-align:center;
+}