merge upstream

static/css/index.css

@@ -37,6 +37,7 @@ body {
   font-weight: 400;
   line-height: 1.6;
   margin: 0;
+  min-height: 100vh;
   -webkit-text-size-adjust: 100%;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
@@ -169,10 +170,6 @@ body > header, body > article, body > footer {
     background: #393b45;
     padding: 0 calc(38% - 18em);
   }
-  body {
-    background: #ffffff;
-    min-height: 100vh;
-  }
   body > header, body > article, body > footer {
     padding: 1.7em 12.5%;
   }