           </two-columns-grid>
              </section>
            </template>

          </iron-pages>

          <!-- detail page -->
          <article-detail name="detail" article="[[article]]"></article-detail>
        </iron-pages>

      </app-header-layout>

    </app-drawer-layout>

  </template>

  <script>

    Polymer({

      is: 'blog-app',

      properties: {

        /**
         * Articles data.
         */
        articles: Object,

        route: Object,

        subRoute: Object,

    