.themes-page[data-astro-cid-3ioksclh]{display:grid;gap:1.5rem;padding:1rem}.themes-hero[data-astro-cid-3ioksclh]{display:flex;flex-direction:column;align-items:center;gap:.85rem;width:100%;max-width:44rem;margin-inline:auto;padding-block:1rem .5rem;text-align:center}.themes-hero[data-astro-cid-3ioksclh] h1[data-astro-cid-3ioksclh]{margin:0;color:var(--text-primary);font-family:var(--font-display);font-size:var(--text-fluid-xl);line-height:var(--leading-snug);letter-spacing:var(--tracking-tight)}.themes-hero-heading[data-astro-cid-3ioksclh]{display:flex;flex-direction:column;align-items:flex-start;text-align:left}.themes-hero-sub[data-astro-cid-3ioksclh]{margin:0;max-width:56ch;color:var(--muted);font-size:var(--text-base);line-height:var(--leading-relaxed)}.difficulty-filter[data-astro-cid-3ioksclh]{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}.difficulty-filter-item[data-astro-cid-3ioksclh]{display:inline-flex;align-items:center;justify-content:center;padding:.45rem 1rem;border:1px solid var(--line);border-radius:999px;background:#fff9;color:var(--ink);font-size:var(--text-base);font-weight:800;text-decoration:none;transition:background .18s ease,border-color .18s ease,color .18s ease}.difficulty-filter-item[data-astro-cid-3ioksclh]:hover{border-color:var(--text-primary)}.difficulty-filter-item[data-astro-cid-3ioksclh].is-active{border-color:transparent;background:var(--text-primary);color:var(--text-inverse)}.theme-group[data-astro-cid-3ioksclh]{display:grid;gap:1rem}.theme-group-head[data-astro-cid-3ioksclh]{display:flex;align-items:center;justify-content:space-between;gap:1rem}.theme-group-title[data-astro-cid-3ioksclh]{display:flex;align-items:center;gap:.75rem;margin:0;font-family:var(--font-display);font-size:var(--text-lg)}.theme-group-count[data-astro-cid-3ioksclh]{color:var(--muted);font-family:var(--font-body);font-size:var(--text-base);font-weight:var(--weight-extrabold)}.difficulty-badge[data-astro-cid-3ioksclh]{display:inline-flex;align-items:center;justify-content:center;height:1.75rem;padding:0 .8rem;border-radius:999px;color:var(--text-inverse);font-size:var(--text-base);font-weight:400;line-height:1;letter-spacing:.02em;white-space:nowrap}.theme-grid[data-astro-cid-3ioksclh]{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem}.empty-state[data-astro-cid-3ioksclh]{padding:2rem 1.25rem;border-radius:var(--radius-xl);text-align:center}.empty-state-title[data-astro-cid-3ioksclh]{margin:0 0 .4rem;font-family:var(--font-display);font-size:var(--text-lg)}.empty-state-desc[data-astro-cid-3ioksclh]{margin:0;color:var(--muted)}.topic-page[data-astro-cid-3ioksclh]{display:grid;gap:1.5rem;padding:1rem}.topic-hero-meta[data-astro-cid-3ioksclh]{margin:0;color:var(--brand-primary-hover);font-size:var(--text-md);font-weight:var(--weight-bold)}.topic-collections[data-astro-cid-3ioksclh]{display:grid;gap:1rem}.topic-collections-grid[data-astro-cid-3ioksclh]{align-items:stretch}.topic-collection-card[data-astro-cid-3ioksclh]{display:flex;flex-direction:column;gap:.7rem;height:100%;padding:1.1rem;border-radius:var(--radius-lg);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}.topic-collection-card[data-astro-cid-3ioksclh]:hover{transform:translateY(-2px);border-color:var(--brand-primary);box-shadow:var(--shadow-card-hover, var(--shadow))}.topic-collection-head[data-astro-cid-3ioksclh]{display:flex;align-items:baseline;justify-content:space-between;gap:.75rem}.topic-collection-name[data-astro-cid-3ioksclh]{margin:0;font-family:var(--font-display);font-size:var(--text-lg);line-height:var(--leading-snug)}.topic-collection-count[data-astro-cid-3ioksclh]{flex-shrink:0;color:var(--muted);font-size:var(--text-xs);font-weight:var(--weight-extrabold);text-align:right}.topic-collection-desc[data-astro-cid-3ioksclh]{margin:0;color:var(--muted);font-size:var(--text-base);line-height:var(--leading-relaxed)}.topic-collection-empty[data-astro-cid-3ioksclh]{margin:0;color:var(--muted);font-size:var(--text-sm)}.difficulty-chips[data-astro-cid-3ioksclh]{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;margin-top:auto}.difficulty-chips-label[data-astro-cid-3ioksclh]{color:var(--muted);font-size:var(--text-xs);font-weight:var(--weight-bold);text-transform:uppercase;letter-spacing:.06em}.difficulty-chips-list[data-astro-cid-3ioksclh]{display:flex;flex-wrap:wrap;gap:.4rem}.difficulty-chip[data-astro-cid-3ioksclh]{display:inline-flex;align-items:center;justify-content:center;padding:.3rem .85rem;border:1px solid var(--line);border-radius:999px;background:#fff9;color:var(--ink);font-size:var(--text-sm);font-weight:800;transition:background .18s ease,border-color .18s ease,color .18s ease}.difficulty-chip[data-astro-cid-3ioksclh]:hover{border-color:var(--btn-primary-bg, var(--brand-primary));background:var(--bg-accent-soft, rgba(255, 255, 255, .9))}.topic-page-actions[data-astro-cid-3ioksclh]{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}.topic-back-link[data-astro-cid-3ioksclh]{display:inline-flex;align-items:center;justify-content:center;padding:.7rem 1.5rem;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--ink);font-weight:var(--weight-bold);transition:border-color .18s ease,color .18s ease}.topic-back-link[data-astro-cid-3ioksclh]:hover{border-color:var(--brand-primary);color:var(--brand-primary-hover)}