Remove default padding from body for consistent layout

core/scss/layout/_core.scss

@@ -7,6 +7,7 @@ body {
   position: relative;
   min-height: 100%;
   height: 100%;
+  padding: 0 !important;
 
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;