text: <style>
      viewer {
          position: relative;
          overflow: hidden;
          /* Start stage */
          z-index: 1;
          justify-content: center;
          align-items: center;
  
          width: 100%;
          height: 100%;
      }
  
      .babylonjs-canvas {
          flex: 1;
          width: 100%;
          height: 100%;
          touch-action: none;
      }
  </style>
  
  <canvas class="babylonjs-canvas" touch-action="none">
  </canvas>
  
  <nav-bar></nav-bar>