app/views/layouts/_search.html.erb
<div class="search">
<form id="search-box" method="get" action="">
<label>
<input id="search-bar" type="search" name="search" placeholder="Search crowdAI">
<span class="fa fa-lg"></span>
</label>
</form>
<a class="search-open fa fa-search fa-lg" href="#"></a>
</div>
<div id="mobile-search-overlay">
<a class="search-open fa fa-search fa-lg" href="#"></a>
<form method="get" action="">
<input type="search" name="search" placeholder="Search crowdAI">
</form>
<a id="search-close" class="fa fa-times fa-lg" href="#"></a>
</div>