:root{--bg: #0b0b0b;--panel: #111;--panel-border: #666;--canvas-bg: #061106;--canvas-border: #7c8c7c;--text: #9cff9c;--text-soft: #d7ffd7;--danger: #ff8f8f}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Courier New,monospace;display:flex;justify-content:center;align-items:center;min-height:100vh}#container{width:560px;background:var(--panel);border:4px solid var(--panel-border);border-radius:12px;padding:16px}h1{margin:0 0 6px;font-size:28px}.desc{font-size:14px;margin-bottom:10px;color:var(--text-soft);line-height:1.4}#hud{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:8px;font-size:14px}canvas{width:100%;background:var(--canvas-bg);border:4px solid var(--canvas-border);border-radius:6px;display:block}.panel{margin-top:10px;font-size:13px;line-height:1.45}.key{border:1px solid #555;padding:2px 6px;border-radius:4px}.site-footer{margin-top:12px;color:#7fbf7f;font-size:12px;text-align:right}