diff --git a/12/style.css b/12/style.css
index a6f8e2a..c30efb8 100644
--- a/12/style.css
+++ b/12/style.css
@@ -36,6 +36,7 @@ body{
   border-width:2px;
   border-color: blue;
   margin-top:30px;
+  max-width:70%;
 }
 
 .audio{