html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #0d0d12;
  overflow: hidden;
}

#stage {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  /* subtle vignette around the letterboxed game */
  background: radial-gradient(ellipse at center, #17171f 0%, #0d0d12 75%);
}

#game {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
  box-shadow: 0 0 0 1px #000, 0 18px 60px rgba(0, 0, 0, 0.55);
}