:root{--bg: #14100a;--panel: #221a10;--line: #3a2d1b;--ink: #f5ecdf;--dim: #b39c7e;--accent: #c0843a;--cell: #2c2316;--cell2: #3a2f1d;--sel: #5a3c12;--ok: #57b86a;--warn: #d4a23a;--err: #c4524f}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#241a0e,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:560px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:27px;letter-spacing:5px;font-weight:800;color:var(--accent)}.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:#201203}.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)}.btn.primary{background:var(--accent);color:#201203;border-color:var(--accent)}.scoreboard{display:flex;gap:10px;justify-content:center;margin:8px 0}.readout{background:#0c0905;border:1px solid var(--line);border-radius:8px;padding:5px 16px;font:800 18px ui-monospace,monospace;color:var(--accent);min-width:92px;text-align:center}.readout span{color:var(--dim);font-size:11px;display:block;font-weight:600;letter-spacing:.5px}.cluebar{text-align:center;background:#0c0905;border:1px solid var(--line);border-radius:8px;padding:8px 10px;margin:8px auto;font-size:13px;color:var(--dim);max-width:480px}.cluebar .ctag{color:var(--accent);font-weight:700;font-size:11px;letter-spacing:.5px}.cluebar code,code{font-family:ui-monospace,monospace;color:var(--ink);background:#1c1610;padding:1px 6px;border-radius:4px}.stage{position:relative;display:flex;justify-content:center}.board{display:grid;gap:3px;width:min(96vw,480px)}.corner{background:transparent;color:var(--dim);display:flex;align-items:center;justify-content:center;font-family:ui-monospace,monospace;font-size:12px;opacity:.5}.colclue,.rowclue{display:flex;align-items:center;justify-content:center;text-align:center;background:#0c0905;border:1px solid var(--line);border-radius:6px;padding:2px;font-family:ui-monospace,monospace;font-size:clamp(9px,2.4vw,13px);color:var(--dim);overflow:hidden}.colclue span,.rowclue span{word-break:break-all;line-height:1.1}.colclue{min-height:44px}.rowclue{min-height:0}.colclue.ok,.rowclue.ok{color:var(--ok);border-color:var(--ok);background:#11200f}.colclue.warn,.rowclue.warn{color:var(--warn);border-color:#5a4a1e}.colclue.err,.rowclue.err{color:var(--err);border-color:#4a1f1e;background:#200f0e}.cell{position:relative;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:clamp(16px,6vw,30px);aspect-ratio:1;background:var(--cell);color:var(--ink);cursor:pointer;border-radius:5px;border:1px solid var(--line)}.cell:hover{background:var(--cell2)}.cell.inline{background:#342817}.cell.sel{background:var(--sel);box-shadow:inset 0 0 0 2px var(--accent)}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#0c0905cc;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:320px}.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}.pad{display:grid;gap:6px;max-width:400px;margin:14px auto 0}.pad button{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:12px 0;border-radius:8px;font:800 18px ui-monospace,monospace;cursor:pointer}.pad button:hover{border-color:var(--accent)}.pad button.erase{color:var(--dim);font-size:16px}.pad button.hint-btn{font:700 14px system-ui;color:var(--accent)}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:12px;line-height:1.6}.hint b.ok{color:var(--ok)}.hint b.warn{color:var(--warn)}.hint b.err{color:var(--err)}