     </div>
        <div class="description horizontal layout center-justified flex">
          <div class="description vertical layout center-justified">
            <h1>404: Page not found</h1>
            <p>Sorry, we couldnâ€™t find that page.</p>
          </div>
        </div>
      </div>
    </div>
  </template>

  <script>
    Polymer({
      is: 'error-404',

      properties: {
        requestedPage: {
          type: String,
        },
      },

      attached: function() {
        this.fir