:root{--bg: #0b1018;--panel: #151c27;--line: #263243;--ink: #eaf3fb;--dim: #8ea3ba;--accent: #4aa8e0;--cell: #1b2535;--cell2: #23314a;--water: #2e7fc4;--water2: #1f5e96;--wall: #76b6ea;--ok: #3fb27f;--over: #d65a68;--bad: #6a2330}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#122031,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:540px;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(--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:#04141f}.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:#04141f;border-color:var(--accent)}.scoreboard{display:flex;gap:10px;justify-content:center;margin:8px 0}.readout{background:#070c12;border:1px solid var(--line);border-radius:8px;padding:5px 16px;font:800 18px ui-monospace,monospace;color:var(--accent);min-width:96px;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}.board{display:grid;gap:0;width:min(94vw,460px);background:transparent}.clue{display:flex;align-items:center;justify-content:center;font:800 15px ui-monospace,monospace;color:var(--dim);padding:2px}.clue.col{align-items:flex-end;padding-bottom:4px}.clue.row{justify-content:flex-end;padding-right:6px}.clue .of{color:#54677d;font-size:11px;margin-left:1px}.clue.done{color:var(--ok)}.clue.over{color:var(--over)}.clue.ok{color:var(--ink)}.cell{position:relative;aspect-ratio:1;background:var(--cell);border:1px solid #11192690;transition:background .08s ease;cursor:pointer}.cell:hover{background:var(--cell2)}.cell.water{background:linear-gradient(to bottom,var(--water),var(--water2))}.cell.water:hover{filter:brightness(1.08)}.cell.bad{box-shadow:inset 0 0 0 2px var(--over)}.cell.water.bad{background:var(--bad)}.cell.wt{border-top:3px solid var(--wall)}.cell.wl{border-left:3px solid var(--wall)}.cell.wr{border-right:3px solid var(--wall)}.cell.wb{border-bottom:3px solid var(--wall)}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#070b10c7;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}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:14px;line-height:1.5}