html,
body,
#game {
  background-color: #0b1220;
  overflow: hidden;
  margin: 0;
}

#game {
  position: absolute;
  inset: 0;
}

.game-canvas {
  display: block;
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms ease;
  touch-action: none;
}

.game-canvas.is-visible {
  opacity: 1;
  visibility: visible;
}