html, body {
  height: 100%;
  margin: 0;
  background: #1b1a17;
  background-image:
    radial-gradient(120% 80% at 50% 0%, #3a3830 0%, #1b1a17 70%);
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  overscroll-behavior: none;
}

#stage {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

#game {
  display: block;
  border-radius: 10px;
  box-shadow:
    0 0 0 2px rgba(0, 0, 0, .55),
    0 18px 50px rgba(0, 0, 0, .55);
  cursor: pointer;
  touch-action: none;
  image-rendering: auto;
}