Fix grid

Author: mrmrs

docs/layout/grid/index.html

@@ -192,10 +192,10 @@ <h1 class="f6 fw6">Previous</h1>
           <h1 class="f6 fw6">Next</h1>
           <a href="/docs/layout/background-size/" class="link fw6 blue dim">Background Size</a>
         </div>
-      </div>
-      <div class="mt5">
-        <h4 class="f6 f5-ns fw6">Reference</h4>
-        <a href="https://developer.mozilla.org/en/docs/Web/css/width" class="link fw6 blue dim">MDN - Width property</a>
+        <div class="mt4">
+          <h4 class="f6 f5-ns fw6">Reference</h4>
+          <a href="https://developer.mozilla.org/en/docs/Web/css/width" class="link fw6 blue dim">MDN - Width property</a>
+        </div>
       </div>
     </div>
     <div class="ph3 ph5-ns pb5">