:root { color-scheme: dark; background: #101a29; }
* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; }
body { background: radial-gradient(circle at 50% 38%, #2b3d54 0, #182334 48%, #0d1725 100%); }
#stage { display: flex; align-items: center; justify-content: center; width: 100vw; height: 100dvh; }
#game { display: block; width: 960px; height: 540px; image-rendering: pixelated; image-rendering: crisp-edges; outline: none; border: 2px solid #e5cba3; box-shadow: 0 0 0 5px #101928, 0 22px 65px #070d18b8; touch-action: none; }
#game:focus-visible { border-color: #f4ce74; }