*{margin:0;padding:0;box-sizing:border-box}body{margin:0;padding:0;width:100vw;height:100vh;display:flex;justify-content:center;align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);font-family:Courier New,monospace;overflow:hidden}#game{border:4px solid #333;box-shadow:0 10px 30px #00000080;border-radius:8px;overflow:hidden;position:relative;max-width:min(90vw,800px);max-height:min(90vh,600px);aspect-ratio:4 / 3}canvas{display:block;image-rendering:pixelated;image-rendering:crisp-edges;max-width:100%;max-height:100%;object-fit:contain}