.filters-section[data-astro-cid-3shpcfji]{margin-bottom:1.25rem}.topic-filters[data-astro-cid-3shpcfji]{display:flex;gap:.5rem;margin-bottom:.75rem;flex-wrap:wrap}.filter-btn[data-astro-cid-3shpcfji]{display:flex;align-items:center;gap:.35rem;padding:.35rem .75rem;background:none;border:1px solid var(--border);border-radius:20px;color:var(--text-secondary);font-family:inherit;font-size:.8rem;cursor:pointer;transition:all .15s}.filter-btn[data-astro-cid-3shpcfji]:hover{border-color:var(--text-muted);color:var(--text)}.filter-btn[data-astro-cid-3shpcfji].active{background:var(--primary);border-color:var(--primary);color:#fff}.filter-count[data-astro-cid-3shpcfji]{font-family:JetBrains Mono,monospace;font-size:.7rem;opacity:.7}.tag-filters[data-astro-cid-3shpcfji]{display:flex;gap:.35rem;flex-wrap:wrap}.tag-btn[data-astro-cid-3shpcfji]{display:flex;align-items:center;gap:.25rem;padding:.25rem .6rem;background:none;border:1px solid var(--border);border-radius:20px;color:var(--text-muted);font-family:inherit;font-size:.7rem;cursor:pointer;transition:all .15s}.tag-btn[data-astro-cid-3shpcfji]:hover{border-color:var(--text-muted);color:var(--text-secondary)}.tag-btn[data-astro-cid-3shpcfji].active{background:var(--bg-hover);border-color:var(--text-muted);color:var(--text)}.difficulty-dot[data-astro-cid-3shpcfji]{width:8px;height:8px;border-radius:50%;flex-shrink:0}.difficulty-dot[data-astro-cid-3shpcfji].difficulty-foundational{background:#22c55e}.difficulty-dot[data-astro-cid-3shpcfji].difficulty-beginner{background:#14b8a6}.difficulty-dot[data-astro-cid-3shpcfji].difficulty-intermediate{background:#f59e0b}.difficulty-dot[data-astro-cid-3shpcfji].difficulty-advanced{background:#f97316}.difficulty-dot[data-astro-cid-3shpcfji].difficulty-expert{background:#ef4444}.topic-list[data-astro-cid-3shpcfji]{list-style:none;padding:0;margin:0}.topic-item[data-astro-cid-3shpcfji]{border-bottom:1px solid var(--border)}.topic-item[data-astro-cid-3shpcfji]:last-child{border-bottom:none}.topic-item[data-astro-cid-3shpcfji][hidden]{display:none}.topic-link[data-astro-cid-3shpcfji]{display:flex;align-items:center;gap:1rem;padding:.75rem .5rem;text-decoration:none;border-radius:6px;transition:background-color .15s}.topic-link[data-astro-cid-3shpcfji]:hover{background-color:var(--bg-hover);text-decoration:none}.topic-number[data-astro-cid-3shpcfji]{font-family:JetBrains Mono,monospace;font-size:.8rem;color:var(--text-muted);flex-shrink:0;width:2rem}.topic-info[data-astro-cid-3shpcfji]{flex:1;min-width:0}.topic-title[data-astro-cid-3shpcfji]{color:var(--text);font-weight:500;display:block}.topic-tags[data-astro-cid-3shpcfji]{display:flex;gap:.3rem;margin-top:.25rem;flex-wrap:wrap}.topic-tag[data-astro-cid-3shpcfji]{font-size:.65rem;padding:.1rem .4rem;border-radius:8px;background:var(--bg-hover);color:var(--text-muted);border:1px solid var(--border)}.difficulty-badge[data-astro-cid-3shpcfji]{font-size:.65rem;font-weight:600;text-transform:uppercase;letter-spacing:.03em;padding:.15rem .5rem;border-radius:10px;flex-shrink:0}.difficulty-foundational[data-astro-cid-3shpcfji]{color:#16a34a;background:#22c55e1a;border:1px solid rgba(34,197,94,.3)}.difficulty-beginner[data-astro-cid-3shpcfji]{color:#0d9488;background:#14b8a61a;border:1px solid rgba(20,184,166,.3)}.difficulty-intermediate[data-astro-cid-3shpcfji]{color:#d97706;background:#f59e0b1a;border:1px solid rgba(245,158,11,.3)}.difficulty-advanced[data-astro-cid-3shpcfji]{color:#ea580c;background:#f973161a;border:1px solid rgba(249,115,22,.3)}.difficulty-expert[data-astro-cid-3shpcfji]{color:#dc2626;background:#ef44441a;border:1px solid rgba(239,68,68,.3)}.topic-count[data-astro-cid-3shpcfji]{font-size:.75rem;color:var(--text-muted);flex-shrink:0}.subject-page[data-astro-cid-2bhgfwwb]{max-width:800px;margin:0 auto;padding:2rem 1.5rem}.subject-header[data-astro-cid-2bhgfwwb]{margin:1.5rem 0 2rem}.subject-header[data-astro-cid-2bhgfwwb] h1[data-astro-cid-2bhgfwwb]{font-size:2rem;font-weight:700;margin-bottom:.5rem}.subject-description[data-astro-cid-2bhgfwwb]{color:var(--text-secondary);font-size:1rem;margin-bottom:.5rem}.subject-count[data-astro-cid-2bhgfwwb]{font-size:.85rem;color:var(--text-muted)}