r-icon-button icon="menu" core-drawer-toggle></paper-icon-button>
          <div flex>My App</div>
        </core-toolbar>
        <div class="container" fit layout vertical>
          <core-pages selected="{{page}}" valueattr="data-category" flex>
            <section data-category="home">
              <h1>Home</h1>
              <div>Home content</div>
            </section>
            <section data-category="portfolio">
              <h1>Portfolio</h1>
              <div>Portfolio content</div>
       