terraform/website/source/layouts/_header.erb

<div id="header" class="<%= current_page.data.page_title == "home" ? "" : "navbar-static-top" %>">
	<div class="container">
    <div class="col-sm-12 col-md-4 nav-logo">
		  <div class="navbar-header">
  		    <button class="navbar-toggle" type="button" data-toggle="collapse" data-target=".bs-navbar-collapse">
  	          <span class="sr-only">Toggle navigation</span>
  	          <span class="icon-bar"></span>
  	          <span class="icon-bar"></span>
  	          <span class="icon-bar"></span>
  	        </button>
  			<a class="navbar-brand logo" href="/">Terraform</a>
  		</div>
    </div>

    <div class="col-sm-12 col-md-8 nav-white">
  		<nav class="collapse navbar-collapse bs-navbar-collapse" role="navigation">
  			<ul class="buttons nav navbar-nav navbar-right rls-sb">
  				<li class="first download terra-btn"><a href="/downloads.html">Download</a></li>
  				<li class="github terra-btn"><a href="https://github.com/hashicorp/terraform">Github</a></li>
  			</ul>

  			<ul class="main-links nav navbar-nav navbar-right rls-sb">
  				<li class="first li-under"><a href="/intro/index.html">Intro</a></li>
  				<li class="li-under"><a href="/docs/index.html">Docs</a></li>
          <li class="li-under"><a href="/community.html">Community</a></li>
  			</ul>
  		</nav>
    </div>
  </div>
</div>