html {height: 100%; width: 100%;}
            *,body {margin:0; padding:0;}
            canvas { position: absolute; z-index: 2; }
            body { width: 100%; height: 100%;}
        
#startup_autofocus_button {
      width: 0px;
      height: 0px;
      position: absolute;
      left: -10px;
      top: -10px
    }