.catalog{max-width:960px;margin:0 auto;padding:0 48px}.catalog .catalog-hero{padding:64px 0 40px}.catalog .catalog-breadcrumb{font-size:.8rem;color:var(--text-secondary);margin-bottom:20px}.catalog .catalog-breadcrumb a{color:var(--text-secondary);text-decoration:none;transition:color .2s}.catalog .catalog-breadcrumb a:hover{color:var(--accent)}.catalog .catalog-hero h1{font-family:"Instrument Serif",serif;font-size:2.8rem;font-weight:400;line-height:1.15;letter-spacing:-.02em;color:var(--text);margin-bottom:16px}.catalog .catalog-intro{font-size:1.05rem;color:var(--text-secondary);line-height:1.7;max-width:600px}.catalog .catalog-toc{display:flex;flex-wrap:wrap;gap:8px;padding:24px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);margin-bottom:48px}.catalog .catalog-toc a{font-size:.8rem;font-weight:500;color:var(--text-secondary);text-decoration:none;padding:6px 14px;border:1px solid var(--border);border-radius:100px;transition:all .2s}.catalog .catalog-toc a:hover{border-color:var(--border-strong);color:var(--text);text-decoration:none}.catalog section{margin-bottom:64px}.catalog section h2{font-size:.75rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--sage);margin-bottom:12px;padding-bottom:12px;border-bottom:2px solid var(--sage);display:inline-block}.catalog .section-intro{font-size:.92rem;color:var(--text-secondary);line-height:1.7;margin-bottom:24px}.catalog .section-intro a{color:var(--accent-text);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s}.catalog .section-intro a:hover{border-bottom-color:var(--accent-text)}.catalog .problem-card{display:flex;align-items:center;gap:24px;padding:28px 32px;margin-top:24px;background:var(--surface);border:2px solid var(--accent);border-radius:8px;text-decoration:none;color:inherit;transition:box-shadow .25s,transform .25s}.catalog .problem-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-1px);text-decoration:none}.catalog .problem-inner{flex:1;min-width:0}.catalog .problem-card .card-arrow{font-size:1.4rem;color:var(--accent);flex-shrink:0;transition:transform .2s}.catalog .problem-card:hover .card-arrow{transform:translate(3px)}.catalog .problem-card h3{font-family:"Instrument Serif",serif;font-size:1.4rem;font-weight:400;color:var(--text);line-height:1.3;margin-bottom:8px}.catalog .problem-card .card-dot{width:10px;height:10px;border-radius:50%;margin-bottom:12px}.catalog .pattern-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.catalog .pattern-card{display:flex;flex-direction:column;padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:8px;text-decoration:none;color:inherit;transition:box-shadow .25s,border-color .25s,transform .25s}.catalog .pattern-card:hover{border-color:var(--border-strong);box-shadow:var(--shadow-hover);transform:translateY(-2px);text-decoration:none}.catalog .card-title{display:flex;align-items:center;gap:10px;margin-bottom:8px}.catalog .card-title .card-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.catalog .pattern-card h3{font-family:"Instrument Serif",serif;font-size:1.15rem;font-weight:400;color:var(--text);line-height:1.3}.catalog .dot-gold{background:var(--accent)}.catalog .dot-blue{background:var(--blue)}.catalog .card-summary{font-size:.85rem;color:var(--text-secondary);line-height:1.6;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.catalog .card-sources{margin-top:12px;font-size:.75rem;color:var(--accent-text);line-height:1.5}.catalog .source-sep{margin:0 5px;color:var(--text-muted)}@media print{.catalog .catalog-toc{display:none}.catalog .pattern-card,.catalog .problem-card{page-break-inside:avoid}}@media(max-width:900px){.catalog .pattern-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.catalog{padding:0 24px}.catalog .catalog-hero h1{font-size:2rem}.catalog .catalog-toc{gap:6px;padding:16px 0}.catalog .catalog-toc a{font-size:.75rem;padding:5px 12px}.catalog .pattern-grid{grid-template-columns:1fr}.catalog .problem-card{padding:20px 24px}}