html,body{margin:0;height:100%;background:#0d1117;color:#e8f5e9;font-family:system-ui,sans-serif}body{display:grid;place-items:center}#game-container{position:relative;line-height:0}#game-container canvas{display:block;border:1px solid #2e7d32}.hud{position:fixed;top:12px;left:12px;padding:6px 10px;border:1px solid #66bb6a;background:#0d1117d9;color:#c8e6c9;font-size:14px;letter-spacing:.04em;pointer-events:none}