body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #555;
}

#canvasBody canvas {
  cursor: none;
  width: 100%;
  display: block;
  margin: auto;
  background: #000;
}

div#canvasBody {
  width: 100vw;
  height: 76vw;
  max-height: 100vh;
  max-width: 131.57vh;
  margin: auto;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: grey;
}