html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #0b0e11;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  overscroll-behavior: none;
}

canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#art { z-index: 1; }
#ui  { z-index: 2; }