* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 100%; height: 100%;
  background: #0b0b12;
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none; user-select: none;
}
#wrap {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
}
#game {
  background: #000;
  image-rendering: auto;
  max-width: 100vw;
  max-height: 100vh;
  aspect-ratio: 16 / 9;
  box-shadow: 0 0 80px rgba(120, 80, 255, .25);
}