enu-item>Item</polymer-ui-menu-item>
      </polymer-ui-menu-button>

      <div main>
        Content.
      </div>

      <polymer-ui-sidebar-menu navigation label="Navigimation" offscreen="basement">
        <polymer-ui-menu-item>Item</polymer-ui-menu-item>
        <polymer-ui-menu-item>Item</polymer-ui-menu-item>
      </polymer-ui-sidebar-menu>

    </polymer-ui-scaffold>

    <h2>scaffold2 (same content)</h2>
    <polymer-ui-scaffold2 theme="polymer-ui-dark-theme" style="display: block; position: rela