Remove top margin of first headers

assets/sass/style.sass

@@ -21,6 +21,8 @@ body
   margin: 0
 h1, h2, h3, h4, h5, h6
   font-family: 'Roboto Slab', sans-serif
+  &:first-child
+    margin-top: 0
 .content
   width: 80ch
   max-width: 100%;