:root{--bg: #f7f6f3;--surface: #ffffff;--ink: #1b1b1f;--muted: #6b6b73;--line: #d9d8d3;--border: #1b1b1f;--accent: #3e63dd;--accent-ink: #ffffff;--solved: #30a46c;color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg: #16161a;--surface: #1f1f24;--ink: #ededef;--muted: #a0a0a8;--line: #34343b;--border: #8b8b94;--accent: #6e8cff;--accent-ink: #0d0d10;--solved: #3dd68c;color-scheme:dark}}*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--ink);font:16px/1.5 Poppins,system-ui,-apple-system,Segoe UI,sans-serif;padding:env(safe-area-inset-top,0) 16px env(safe-area-inset-bottom,0)}a{color:var(--accent)}h1,h2{line-height:1.2;margin:0}h1{font-size:1.6rem;font-weight:600}.page{max-width:720px;margin:0 auto;padding-block:24px 48px}.page-head{margin-bottom:20px}.page-head h1{margin-top:4px}.lede{color:var(--muted);margin:6px 0 0}.brand{margin:0;color:var(--muted);font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase}.back{text-decoration:none;font-size:.9rem;font-weight:500}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);font:inherit;font-weight:500;text-decoration:none;cursor:pointer}.btn:hover:not(:disabled){border-color:var(--muted)}.btn:disabled{opacity:.45;cursor:default}.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}.tab{padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-decoration:none;font-weight:500}.tab small{color:var(--muted);font-weight:400}.tab.active{background:var(--ink);border-color:var(--ink);color:var(--bg)}.tab.active small{color:inherit;opacity:.7}.progress-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;color:var(--muted)}.tiles{display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(52px,1fr))}.tile{aspect-ratio:1;display:grid;place-items:center;border-radius:10px;background:var(--surface);border:1px solid var(--line);color:var(--ink);text-decoration:none;font-weight:500;font-variant-numeric:tabular-nums}.tile:hover{border-color:var(--accent)}.tile.solved{background:var(--solved);border-color:var(--solved);color:var(--accent-ink)}.play{max-width:560px;margin:0 auto;padding-block:12px 24px;min-height:100dvh;display:flex;flex-direction:column;gap:12px}.play-head{display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.play-head h1{font-size:1.15rem;text-align:center}.timer{justify-self:end;font-variant-numeric:tabular-nums;color:var(--muted)}.board-wrap{position:relative;width:min(100%,calc(100dvh - 200px));min-width:260px;margin:0 auto}.cn-board{display:block;width:100%;height:auto;aspect-ratio:1;background:var(--surface);border-radius:6px;touch-action:none;user-select:none;-webkit-user-select:none;cursor:pointer}.cn-board .grid-line{stroke:var(--line);stroke-width:.03;fill:none}.cn-board .grid-border{stroke:var(--border);stroke-width:.06;fill:none}.cn-board .pipe{fill:none;stroke-width:.3;stroke-linecap:round;stroke-linejoin:round}.cn-board .num{font-size:.42px;font-weight:600;text-anchor:middle;dominant-baseline:central;pointer-events:none}.play-foot{display:flex;flex-direction:column;align-items:center;gap:10px}.status{color:var(--muted);font-size:.9rem;font-variant-numeric:tabular-nums}.actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.win{position:absolute;inset:0;display:grid;place-items:center;background:color-mix(in srgb,var(--bg) 55%,transparent);border-radius:6px;animation:fade .25s ease-out}.win-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px 28px;text-align:center;box-shadow:0 10px 30px #00000026}.win-card h2{font-size:1.5rem}.win-card p{color:var(--muted);margin:6px 0 16px}@keyframes fade{0%{opacity:0}}[hidden]{display:none!important}