html, body {
    width: 100%;
    height: 100%;
    margin: 0px;
    border: 0;
    overflow: hidden;
    display: block;
    background: black;
  }


  
  #stage
  {
      width: 100vw; 
      height: 100vw;
      max-height: 100vh;
      max-width: 100vh;
      margin: auto;
      position: absolute;
      top:0;bottom:0;
      left:0;right:0;
  }