:root{--bg: #0e1017;--panel: #141824;--ink: #f2f0e9;--muted: #9aa0b2;--board-edge: rgba(120, 140, 200, .14);--grid: rgba(150, 165, 210, .22);--accent: #f0abfc;--sel: #e879f9;--good: #4ade80;--bad: #f87171;--hintc: #fbbf24}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(1100px 640px at 50% -8%,#1f1b30 0%,var(--bg) 60%);color:var(--ink);font:15px/1.5 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}main{max-width:680px;margin:0 auto;padding:32px 20px 48px;text-align:center}h1{margin:0;font-size:34px;letter-spacing:.5px}h1 span{color:var(--accent);text-shadow:0 0 18px rgba(240,171,252,.5)}.sub{margin:6px auto 20px;max-width:560px;color:var(--muted)}#wrap{display:flex;justify-content:center}#board{background:var(--panel);border-radius:14px;border:1px solid var(--board-edge);box-shadow:0 20px 60px #00000080;padding:8px;transition:filter .35s ease;touch-action:none;cursor:crosshair}#board.won{filter:drop-shadow(0 0 12px rgba(74,222,128,.45))}.cell{fill:var(--panel);stroke:var(--grid);stroke-width:1}.box{stroke-width:2;transition:fill .12s ease}.box.bad{fill:#7f1d2b8c;stroke:#b91c1c}.box.hinted{stroke:var(--hintc);stroke-width:3}.preview{fill:#e879f929;stroke:var(--sel);stroke-width:2;stroke-dasharray:5 4;pointer-events:none}.clue{fill:var(--ink);font-weight:700;text-anchor:middle;dominant-baseline:central;pointer-events:none;font-family:ui-sans-serif,system-ui,sans-serif;paint-order:stroke;stroke:#0e1017d9;stroke-width:3px}.hud{margin:18px auto 4px;color:var(--muted);font-size:13px;min-height:20px}#status.win{color:var(--good);font-weight:700;text-shadow:0 0 14px rgba(74,222,128,.5)}#status.bad{color:var(--bad)}.controls{display:flex;gap:10px;justify-content:center;align-items:center;flex-wrap:wrap;margin-top:12px}select,.controls 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}.controls button:hover{border-color:var(--accent)}#solve{border-color:var(--sel);color:var(--sel)}label{color:var(--muted);font-size:13px}label select{margin-left:6px}.note{margin:26px auto 0;max-width:600px;color:var(--muted);font-size:13px;text-align:left}.note strong,.note em{color:var(--ink)}