body{
    margin:0;
    padding:0;
    background:#fff;
}
canvas{
    display:block;
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
    height:min(100vh,calc(100vw*1.333))!important;
    width:min(100vw,calc(100vh*.75))!important;
}