account for nav on docs pages

docs/_includes/nav-home.html

 <header class="navbar navbar-sm navbar-inverse navbar-fixed-top bd-navbar" role="banner">
-  <div class="container">
   <nav class="nav navbar-nav">
     <a class="nav-item nav-link" href="{{ site.baseurl }}/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Bootstrap');">Bootstrap</a>
     <a class="nav-item nav-link" href="{{ site.baseurl }}/getting-started/overview/" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Docs');">Documentation</a>
     <a class="nav-item nav-link" href="{{ site.expo }}" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Expo');">Expo</a>
     <a class="nav-item nav-link" href="{{ site.blog }}" onclick="ga('send', 'event', 'Navbar', 'Community links', 'Blog');">Blog</a>
   </nav>
-  </div>
 </header>

docs/assets/css/docs.min.css

@@ -4,6 +4,9 @@
  * Licensed under the Creative Commons Attribution 3.0 Unported License. For
  * details, see http://creativecommons.org/licenses/by/3.0/.
  */
+.bd-docs {
+  padding-top: 3.7rem; }
+
 .bd-container {
   position: relative;
   max-width: 62rem;
@@ -81,7 +84,7 @@
     margin-left: 240px; }
   .bd-sidebar {
     position: fixed;
-    top: 0;
+    top: 3.7rem;
     bottom: 0;
     left: 0;
     width: 240px;
@@ -240,8 +243,7 @@
       background-color: rgba(0, 0, 0, 0.5); }
 
 .bd-navbar {
-  padding-top: .25rem;
-  padding-bottom: .25rem;
+  padding: .25rem;
   background-color: #2a2730; }
   .bd-navbar .nav-link {
     color: #8e869d; }

docs/assets/scss/_homepage.scss

@@ -30,8 +30,7 @@
 //
 
 .bd-navbar {
-  padding-top: .25rem;
-  padding-bottom: .25rem;
+  padding: .25rem;
   background-color: $bd-graphite;
 
   .nav-link {

docs/assets/scss/_layout.scss

+
+.bd-docs {
+  padding-top: 3.7rem;
+}
+
 // Custom container
 //
 // Doesn't use the default `.container` styles for easier modifications.

docs/assets/scss/_sidebar.scss

@@ -31,7 +31,7 @@
   }
   .bd-sidebar {
     position: fixed;
-    top: 0;
+    top: 3.7rem;
     bottom: 0;
     left: 0;
     width: 240px;