:root{--bg: #0e1116;--panel: #181d25;--line: #2a323d;--ink: #eef3f7;--dim: #93a4b3;--accent: #5a9c6a;--accent2: #7ec48d;--bad: #ff9aa6}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#16221a,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:520px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:28px;letter-spacing:6px;font-weight:800;color:var(--accent2)}.sub{margin:3px 0 0;color:var(--dim);font-size:13px}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:10px 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:#06150b}.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(--accent2)}.btn.primary{background:var(--accent);color:#06150b;border-color:var(--accent)}.scoreboard{display:flex;gap:10px;justify-content:center;margin:8px 0}.readout{background:#0a0e13;border:1px solid var(--line);border-radius:8px;padding:5px 16px;font:800 18px ui-monospace,monospace;color:var(--accent2);min-width:92px;text-align:center}.readout span{color:var(--dim);font-size:11px;display:block;font-weight:600;letter-spacing:.5px}.stage{position:relative;display:flex;justify-content:center;margin:6px 0}.promptcard{background:linear-gradient(180deg,#1b2630,#141b22);border:1px solid var(--line);border-radius:16px;width:min(94vw,440px);min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:22px;position:relative}.modtag{position:absolute;top:10px;left:50%;transform:translate(-50%);background:#2a3a2c;color:var(--accent2);border:1px solid #3a5a40;font:700 11px system-ui;letter-spacing:1px;padding:3px 10px;border-radius:999px}.note{font-size:clamp(56px,18vw,88px);font-weight:800;color:var(--ink);line-height:1}.qhint{margin-top:12px;color:var(--dim);font-size:14px;text-align:center}.pad{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;max-width:440px;margin:14px auto 0}.pad button{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:10px 0 8px;border-radius:8px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px}.pad button:hover{border-color:var(--accent2)}.pad button .num{font:800 18px ui-monospace,monospace}.pad button .sol{font:600 10px system-ui;color:var(--dim)}.pad button.good{background:#234029;border-color:var(--accent2)}.pad button.good .sol{color:var(--accent2)}.pad button.bad{background:#4a2228;border-color:var(--bad)}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#080c10d1;border-radius:16px;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:320px}.card h2{margin:0 0 6px;font-size:24px;color:var(--accent2)}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:12px;line-height:1.5}.hint b{color:var(--ink)}