  </aside>
  </section>

  <section>
    <!-- Example of using paper-shadow to add a shadow to an element -->
    <div>
      <div id="z1" class="card">
        <paper-shadow id="s1" z="1"></paper-shadow>
      </div>
    </div>
    <aside>
      z-depth = 1
    </aside>
    <script>
      document.addEventListener('polymer-ready', function() {
        document.getElementById('s1').target = document.getElementById('z1');
      });
    </script>
  </section>

  <section>
    <!-- Example of using paper-shado