<body>
  <div class="flexbox">   
      
    <div class="ui-sidebar  flexbox__item">
      
      <ul class="ui-main-nav  nav  nav--stacked">
        <li class="ui-main-nav__item">Workspace 0</li>
		<li class="ui-main-nav__item  ui-main-nav__item--active">Workspace 1

          <ul class="ui-sub-nav  nav  nav--stacked">
            <li class="ui-sub-nav__item">Feed</li>
            <li class="ui-sub-nav__item  ui-sub-nav__item--active">Media</li>
            <li class="ui-sub-nav__item">People</li>
            <li class="ui-sub-nav__item">Settings</li>
          </ul>
                     
        </li>
      </ul>
    </div>
        
    <div class="ui-main-content  flexbox__item">
    </div>
      
  </div>
</body>