html, body {
  margin: 0;
  padding: 0;
  background-color: transparent;
}

canvas {
  display: block;
  box-shadow: rgba(0, 0, 0, 0.22) 0px 8px 12px -1px, rgba(0, 0, 0, 0.16) 0px 4px 8px -2px;
      padding: 0;
    margin: auto;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}