#canvas {
#    position:fixed;
#    left:0;
#    top:0;
#    width:100%;
#    height:100%;
#}

html, body {
    height: 100%;
    overflow: hidden;
    width: 100%;
    position: fixed;
    margin: 0 !important;
    padding: 0 !important;
}

body {
  background-color: black;
}