:root{--bg: #0f1219;--panel: #192031;--ink: #edf1f9;--muted: #8f9bb8;--clue: #a9b6d6;--cellbg: #232c41;--fill: #5eead4;--fill-lo: #2dd4bf;--xmark: #64748b;--hintc: #fbbf24;--good: #4ade80;--accent: #93c5fd}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(1100px 650px at 50% -8%,#1a2336 0%,var(--bg) 62%);color:var(--ink);font:15px/1.5 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}main{max-width:640px;margin:0 auto;padding:32px 20px 48px;text-align:center}h1{margin:0;font-size:34px}h1 span{color:var(--fill)}.sub{margin:6px 0 20px;color:var(--muted)}#wrap{display:flex;justify-content:center}#grid{display:grid;gap:2px;padding:14px;background:var(--panel);border-radius:14px;border:1px solid rgba(120,140,200,.14);box-shadow:0 20px 60px #00000073}.clue{display:flex;align-items:flex-end;justify-content:flex-end;color:var(--clue);font-size:clamp(10px,2.4vw,13px);font-variant-numeric:tabular-nums;padding:2px 4px;gap:4px;white-space:pre}.clue.col{flex-direction:column;align-items:center;justify-content:flex-end;gap:0;line-height:1.15}.corner{background:transparent}.cell{width:clamp(24px,6.2vw,38px);height:clamp(24px,6.2vw,38px);border:0;border-radius:5px;background:var(--cellbg);cursor:pointer;display:grid;place-items:center;color:var(--xmark);font-size:clamp(12px,3vw,18px);transition:background .08s ease;padding:0}.cell.f{background:linear-gradient(180deg,var(--fill),var(--fill-lo))}.cell.hint{outline:3px solid var(--hintc);outline-offset:-3px}.cell.gr{margin-right:6px}.cell.gb{margin-bottom:6px}.clue.gr{margin-right:6px}.clue.gb{margin-bottom:6px}.hud{margin:12px auto 4px;color:var(--muted);font-size:13px;min-height:20px}#status.win{color:var(--good);font-weight:700}#status.bad{color:#f87171}.controls{display:flex;gap:10px;justify-content:center;align-items:center;flex-wrap:wrap;margin-top:12px}select,button{font:inherit;border-radius:9px;border:1px solid rgba(120,140,200,.25);background:var(--panel);color:var(--ink);padding:7px 13px;cursor:pointer}button:hover{border-color:var(--accent)}#solve{border-color:var(--good);color:var(--good)}#xmode[aria-pressed=true]{border-color:var(--hintc);color:var(--hintc)}label{color:var(--muted);font-size:13px}label select{margin-left:6px}.note{margin:26px auto 0;max-width:520px;color:var(--muted);font-size:13px;text-align:left}.note strong,.note em{color:var(--ink)}