:root{--primary:#c1ff00;--bg-dark:#050505;--card:#0f0f0f;--text:#f5f5f5;--muted:#9b9b9b;--line:#232323}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:"Courier New",Courier,monospace;color:var(--text);background:radial-gradient(circle at 15% 12%,#1b1b1b 0,transparent 35%),radial-gradient(circle at 86% 88%,#101010 0,transparent 35%),var(--bg-dark);display:flex;justify-content:center;padding:16px}.back-btn{position:fixed;top:16px;left:16px;color:var(--text);text-decoration:none;border:2px solid var(--line);border-radius:8px;background:rgba(10,10,10,.88);padding:8px 12px;z-index:20}.game-shell{width:min(560px,100%);display:grid;place-items:center;margin-top:48px}.screen{width:100%}.hidden{display:none}.card,.card-lite{border:2px solid var(--line);border-radius:14px;background:linear-gradient(180deg,#111 0,#0a0a0a 100%)}.card{padding:22px;text-align:center}h1,h2{margin:0 0 12px;letter-spacing:1px}p{margin:0 0 18px;color:var(--muted);line-height:1.4}button{cursor:pointer;font:inherit;font-weight:700;background:#c1ff00;color:#0c0c0c;border:3px solid #0c0c0c;border-radius:10px;padding:10px 18px}.hud{display:flex;justify-content:space-between;gap:8px;padding:10px 14px;margin-bottom:10px;font-size:14px}.hud span{color:var(--primary);font-weight:700}.canvas-wrap{position:relative;padding:10px}#gameCanvas{width:100%;display:block;background:var(--bg-dark);border-radius:10px}.status-overlay{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:rgba(0,0,0,.7);border:1px solid var(--line);border-radius:8px;padding:8px 12px;color:#fff;font-size:14px;white-space:nowrap;pointer-events:none}.result-line{margin-bottom:12px}@media (max-width:600px){body{padding:10px}.game-shell{margin-top:52px}.hud{font-size:12px;padding:8px 10px}.back-btn{font-size:13px;padding:7px 10px}}