html {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }

  body {
    background-color: white;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: row;
    margin: 0;
    overflow: hidden;
  }

  canvas { max-width: 100%;
 	    max-height: 100%;
 	    bottom: 0;
 	    left: 0;
 	    margin: auto;
 	    overflow: auto;
 	    position: fixed;
 	    right: 0;
 	    top: 0;
 	    -o-object-fit: contain;
 	    object-fit: contain; }