diff --git a/playground/css.css b/playground/css.css
index 6c4c3dd..84ee63a 100644
--- a/playground/css.css
+++ b/playground/css.css
@@ -44,6 +44,7 @@
 #htmlOutput {
   background-color: white;
   height: 100%;
+  border: 0;
   width: 50%;
 }
 @media screen and (min-width:0px) and (max-width:1079px) {