diff --git a/12/style.css b/12/style.css
index 8b067a9..6460181 100644
--- a/12/style.css
+++ b/12/style.css
@@ -489,6 +489,8 @@ a:hover{
 }
 
 etherpad_iframe{
+  display: inline-block;
+  position: relative;
 	height: 100%;
   	width: 100%;
 }