:root{--bg: #f7f6f3;--surface: #ffffff;--ink: #1b1b1f;--muted: #6b6b73;--line: #d9d8d3;--border: #1b1b1f;--accent: #8e4ec6;--accent-soft: #efe4fb;--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: #b88cf0;--accent-soft: #2e2340;--accent-ink: #0d0d10;--solved: #3dd68c;color-scheme:dark}}*{box-sizing:border-box}a,button{touch-action:manipulation;-webkit-tap-highlight-color:transparent}html,body{margin:0}html{touch-action:manipulation}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}.account-line{margin:-6px 0 14px;font-size:.9rem;min-height:1.4em}.account-line a{font-weight:500}.brand{margin:0;color:var(--muted);font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase}.site-back{display:inline-block;margin-bottom:14px}.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(84px,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:calc(100dvh - 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