Simplification on box-sizing

app/assets/stylesheets/all.sass

@@ -2,12 +2,13 @@
   height: auto
   padding: 0
   max-width: 100%
-  box-sizing: border-box
+  box-sizing: inherit
   margin-left: auto
   margin-right: auto
 
 html
   height: 100%
+  box-sizing: border-box
   background-color: #9CC5EE
   // Integrating adl in another website
   &.iframe