html,body{background:#000;height:100%;margin:0}body{place-items:center;display:grid}#game{--scale-step:calc(320 * var(--device-pixel,1px));width:max(var(--scale-step), round(down, min(100vw, 100vh * 16 / 9), var(--scale-step)));aspect-ratio:16/9;image-rendering:pixelated}.debug-overlay{color:#0f0;pointer-events:none;background:#0009;margin:0;padding:4px 8px;font:12px monospace;position:fixed;top:8px;left:8px}