diff --git a/html/document.less b/html/document.less
index 6810deb..a5b4671 100644
--- a/html/document.less
+++ b/html/document.less
@@ -10,7 +10,7 @@ html{
     font: 14px sans-serif;
     &[data-loading="true"]{
         overflow: hidden;
-        background:#FFF;
+        // background:#FFF;
     }
     &[data-output="true"]{
         overflow: hidden;
@@ -259,6 +259,7 @@ h1{
         width:800px;
         max-width:100%;
         box-shadow: 0 0 20px rgba(40,80,200,.2);
+        margin:10px 0 40px;
     }
     .ctrl-box{
         padding:10px 0;