:root{--bg: #13110b;--panel: #25201a;--line: #43392a;--ink: #f4efe4;--dim: #c2b292;--accent: #c09a3a;--ok: #62d98a;--bad: #e0654a;--info: #7bd1ff}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#1f1a12,var(--bg));color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:flex;justify-content:center;-webkit-user-select:none;user-select:none}#app{width:100%;max-width:600px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:26px;letter-spacing:4px;font-weight:800;color:var(--accent)}.sub{margin:2px 0 0;color:var(--dim);font-size:13px}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:9px 0}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}.seg button{background:none;border:none;color:var(--dim);padding:6px 13px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#2a2206}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:7px 14px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.status{text-align:center;min-height:20px;margin:6px 0;color:var(--dim);font-size:13px;font-weight:600}.stage{position:relative;display:flex;justify-content:center}canvas{width:100%;max-width:520px;height:auto;display:block;border-radius:8px;background:#0e0c14;box-shadow:0 12px 34px #0000008c;touch-action:none}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#0a0806bd;border-radius:8px;backdrop-filter:blur(3px)}.overlay.hidden{display:none}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 26px;text-align:center;max-width:340px}.card h2{margin:0 0 6px;font-size:24px;color:var(--accent)}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.prompt{text-align:center;font-size:16px;font-weight:700;margin:12px 6px 6px;min-height:22px}.options{display:grid;grid-template-columns:1fr 1fr;gap:8px;max-width:420px;margin:0 auto}.opt{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:12px;border-radius:10px;font:700 15px system-ui;cursor:pointer;transition:background .12s,border-color .12s}.opt:hover:not(:disabled){border-color:var(--accent)}.opt:disabled{cursor:default;opacity:.96}.opt.right{background:#62d98a38;border-color:var(--ok);color:var(--ok)}.opt.wrong{background:#e0654a33;border-color:var(--bad);color:var(--bad)}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:14px}