Fixed background flash on first load and fixed top and bottom padding.

app/styles/main.css

@@ -13,12 +13,14 @@ html {
   background-image:      -o-linear-gradient(-90deg, #fefefe 0%, #f1f1f1 100%);
   background-image:         linear-gradient(-180deg, #fefefe 0%, #f1f1f1 100%);
   background-repeat: no-repeat;
+  height: 100%;
 }
 
 body {
   color: #424F59;
   font-family: "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
   font-size: 14px;
+  padding: 75px 0;
 }
 
 a {
@@ -39,7 +41,7 @@ noscript {
   border-radius: 10px;
   -webkit-box-shadow: 0px 1px 3px 0px rgba(0,0,0,0.25);;
   box-shadow: 0px 1px 3px 0px rgba(0,0,0,0.25);
-  margin: 60px auto 0;
+  margin: 0 auto;
   min-height: 550px;
   /* padding-bottom = 30px (below icon) + 31px (firefox icon) + 40px (above icon) */
   padding: 50px 25px 101px 25px;