diff --git a/src/thsf/static/css/style.css b/src/thsf/static/css/style.css
index f804365..0766544 100644
--- a/src/thsf/static/css/style.css
+++ b/src/thsf/static/css/style.css
@@ -54,6 +54,7 @@ span.place {
 }
 
 #content_wrapper {
+  background-color: red;
   position: fixed;
   top: 0;
   bottom:0;