html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #150a2c;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

#game {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none; /* prevents double-tap zoom / scroll while playing */
  display: block;
}