body {
  /* override the default margin of the html body */
  margin: 0;
}
canvas {
    background-color: #000000;
    display: block;
    max-width: 100%;
    max-height: 100vh;
}

#canvasContainer {
  height: 100vh;
  width: 100vw;

  display: flex;
  align-items: center;
  justify-content: center;
}

#myCanvas {
  max-width: 100%;
  max-height: 100vh;
}