diff --git a/trac/htdocs/main.css b/trac/htdocs/main.css
index ce77090..fb91aaa 100644
--- a/trac/htdocs/main.css
+++ b/trac/htdocs/main.css
@@ -1,3 +1,7 @@
+body {
+    width:80%;
+    margin: auto;
+}
 :link, :visited { color: #3a5; }
 :link:hover, :visited:hover { color: #a2d; }