html, body {
  margin: 0;
  height: 100%;
  background: radial-gradient(ellipse at 50% 30%, #0c1330 0%, #03040b 70%);
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}
body {
  display: grid;
  place-items: center;
}
canvas {
  display: block;
  border-radius: 6px;
  box-shadow: 0 0 60px rgba(46, 230, 255, 0.18), 0 0 140px rgba(255, 75, 214, 0.10);
}