* { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
  background: #05050a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
}
#game-wrap {
  width: 100%;
  max-width: 960px;
  aspect-ratio: 960 / 540;
}
#game {
  width: 100%;
  height: 100%;
  display: block;
  background: #000;
  image-rendering: pixelated;
  cursor: pointer;
}