<header class="main-header">
  <a class="logo">
      <a class="sidebar-toggle padding" data-toggle="offcanvas" role="button">      
        <span class="sr-only"></span>
      </a>
  <span class="logo-lg">Library App</span>
  </a>
  <nav class="navbar navbar-static-top" role="navigation">
  </nav>
</header>