html, body {
  margin: 0;
  padding: 0;
  height: 100vh;
  width: 100vw;
  background-color: #FFFFFF;
    display: flex;
    justify-content: center;
}
canvas {
    margin: 0;
    padding: 0;
    max-width: 100vw;
    max-height: 100vh;
    object-fit: scale-down;
}