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var(--line);place-items:center;font-size:4.2cqi;font-weight:700;display:grid}.demo-board span:nth-child(9n){border-right:0}.demo-board span:nth-child(3n):not(:nth-child(9n)){border-right:2px solid var(--line-strong)}.demo-board span:nth-child(n+19):nth-child(-n+27),.demo-board span:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid var(--line-strong)}.demo-board span:nth-child(n+73){border-bottom:0}.features{grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin:28px 0 8px;padding:0;list-style:none;display:grid}.features li{color:var(--ink-soft);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);gap:12px;padding:16px;font-size:.88rem;display:flex}.features strong{color:var(--ink)}.features svg{color:var(--accent);flex:none;margin-top:2px}.section-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:8px 24px;margin:48px 0 18px;display:flex}.section-head h2{margin:0 0 4px;font-size:1.6rem}.section-head p{color:var(--muted);margin:0}.section-head a{font-size:.9rem;font-weight:700;text-decoration:none}.hero-sub{color:var(--ink-soft);max-width:640px;font-size:1.04rem}.cards{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin:16px 0;padding:0;list-style:none;display:grid}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);transition:border-color .15s}.card:hover{border-color:#3a4452}.card a.card-link{height:100%;color:inherit;flex-direction:column;padding:18px;text-decoration:none;display:flex}.card h3{margin:14px 0 6px;font-size:1.05rem}.card p{color:var(--muted);margin:0 0 14px;font-size:.88rem;line-height:1.5}.card-tag{color:var(--ink-soft);margin-top:auto;font-size:.78rem;font-weight:700}.card-icon{width:36px;height:36px;color:var(--accent);background:var(--accent-soft);font-family:var(--mono);border-radius:9px;place-items:center;font-size:.8rem;font-weight:700;display:grid}.card a.card-link:hover 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var(--line);border-radius:var(--radius-card);width:100%;margin:1em 0;font-size:.92rem;overflow:hidden}.prose th,.prose td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:10px 12px}.prose tr:last-child td{border-bottom:0}.prose th{color:var(--ink);background:var(--surface-2)}.page-with-rail{grid-template-columns:minmax(0,1fr);gap:24px;display:grid}@media (width>=1100px){.page-with-rail{grid-template-columns:minmax(0,1fr) 300px}}.page-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:12px 24px;margin:24px 0 18px;display:flex}.page-head h1{margin:2px 0 0}.crumbs{color:var(--muted);gap:6px;margin:0;padding:0;font-size:.82rem;list-style:none;display:flex}.crumbs li+li:before{content:"/";margin-right:6px}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--ink)}.ad-slot{border:1px solid var(--line);border-radius:var(--radius-card);contain:layout;justify-content:center;align-items:center;width:100%;margin:24px auto;display:flex;position:relative;overflow:hidden}.ad-label{text-transform:uppercase;letter-spacing:.12em;color:var(--muted);font-size:.68rem;font-weight:600;position:absolute;top:6px;left:50%;transform:translate(-50%)}.ad-top,.ad-bottom{max-width:970px;min-height:120px}.ad-side{max-width:300px;min-height:600px;position:sticky;top:16px}.ad-ins{width:100%;min-height:inherit;display:block}.ad-placeholder{border-style:dashed}@media (width<=1099px){.ad-side{display:none}}.player{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel);margin:0 0 32px}.player-toolbar{border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:flex-end;gap:12px 16px;padding:14px 18px;display:flex}.timer{font-family:var(--mono);font-variant-numeric:tabular-nums;align-items:center;gap:10px;margin-left:auto;font-size:1.15rem;font-weight:700;display:inline-flex}[data-role=pause]{--icon:var(--icon-pause);background:var(--surface-2);width:40px;min-height:40px}[data-role=pause]:before{width:15px;height:15px}[data-role=pause][aria-pressed=true]{--icon:var(--icon-play)}.player-main{padding:18px;position:relative}.player>.status{margin:0;padding:0 18px 10px}.player>.status:empty{padding-bottom:0}.game-area{grid-template-columns:minmax(0,1fr);align-items:start;gap:20px;display:grid}@media (width>=820px){.game-area{grid-template-columns:minmax(0,560px) minmax(270px,1fr)}}.board-wrap{--board-border:2px;width:100%;max-width:560px;position:relative;container-type:inline-size}.board{--rows:9;--cols:9;grid-template-columns:repeat(var(--cols), minmax(0, 1fr));grid-template-rows:repeat(var(--rows), minmax(0, 1fr));aspect-ratio:var(--cols) / var(--rows);border:var(--board-border) 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