html, body {
  margin: 0;
  padding: 0;
  background-color:#2C363F;
  touch-action: manipulation;
  overscroll-behavior: none;
  overflow: hidden;
}
canvas {
  display: block;
    position: absolute;
    top:  50%;
    left: 50%;
    transform: translate(-50%,-50%);
    touch-action: manipulation;
    overscroll-behavior: none;
    overflow: hidden;
}