<div id="app" class="app app-sidebar-fixed app-with-top-menu">
  <div class="app-header">
    <a href="index.html" class="navbar-brand">...</a>
    
    <button type="button" class="navbar-mobile-toggler" data-bs-toggle="collapse" data-bs-target="#top-navbar">
      <span class="fa-stack fa-lg">
        <i class="far fa-square fa-stack-2x"></i>
        <i class="fa fa-cog fa-stack-1x"></i>
      </span>
    </button>
    
    <button type="button" class="navbar-mobile-toggler" data-toggle="app-sidebar-mobile">
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
    </button>
  </div>
  </div>
          
  <div class="app-top-menu" data-bs-theme="dark">
    ...
  </div>
  
  <div class="app-sidebar" data-bs-theme="dark">
    ...
  </div>
  <div class="app-sidebar-bg" data-bs-theme="dark"></div>
  
  ...
</div>