Homepage: padding fixes for mobile

Author: nicoburns

src/styles/app.scss

@@ -555,7 +555,7 @@ blockquote::before {
     .button.button-primary.button-download {
       padding: 5px;
       font-size: 1.5em;
-      margin-top: 20px;
+      margin-top: 0;
     }
   }
 }

templates/index.hbs

@@ -1,5 +1,5 @@
 {{#*inline "page"}}
-<header>
+<header class="pt4 pt0-l">
   <div class="container flex flex-column flex-row-l justify-between-l">
     <div class="mw8-l">
       <h1>Rust</h1>
@@ -8,7 +8,7 @@
         systems programmer.
       </h2>
     </div>
-    <div class="mt4 mt0-l">
+    <div>
       <a class="button button-primary button-download ph4 mt0" href="/learn/get-started">
         Get started
       </a>