.sa-topics-grid{display:grid;grid-template-columns:40% 60%;gap:1rem;align-items:start}@media (max-width:980px){.sa-topics-grid{grid-template-columns:1fr}}.sa-topics-tree-card{display:flex;flex-direction:column;padding:0}.sa-topics-search-row{position:relative;padding:.75rem .875rem;border-bottom:1px solid var(--theme-border,rgba(15,23,42,.08))}.sa-topics-search-icon{position:absolute;left:1.4rem;top:50%;transform:translateY(-50%);color:var(--theme-text-muted,#64748b);pointer-events:none}.sa-topics-search-input{padding-left:2.1rem;width:100%}.sa-topic-tree{flex:1;max-height:540px;overflow-y:auto;padding:.5rem}.sa-topics-tree-foot{border-top:1px solid var(--theme-border,rgba(15,23,42,.08));padding:.5rem .875rem;font-size:.78rem;color:var(--theme-text-muted,#64748b)}.sa-topic-item{display:flex;align-items:center;gap:.4rem;padding:.375rem .5rem;border-radius:6px;cursor:pointer;transition:background .15s ease}.sa-topic-item:hover{background:var(--theme-bg,#f1f5f9)}.sa-topic-item.active{background:var(--theme-accent-soft,rgba(13,148,136,.1));color:var(--theme-text,#0f172a)}.sa-topic-expand{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;padding:0;border:none;background:transparent;color:var(--theme-text-muted,#64748b);cursor:pointer;flex-shrink:0;transition:transform .2s ease}.sa-topic-expand.expanded{transform:rotate(90deg)}.sa-topic-expand-spacer{display:inline-block;width:18px;flex-shrink:0}.sa-topic-name{flex:1;font-size:.85rem;font-weight:600;color:var(--theme-text,#0f172a);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sa-topic-count{display:inline-flex;align-items:center;padding:.1rem .45rem;background:var(--theme-accent-soft,rgba(13,148,136,.1));color:var(--theme-accent,#0d9488);border-radius:999px;font-size:.7rem;font-weight:700}.sa-topic-tree-nested{margin-left:1.1rem;border-left:1px dashed var(--theme-border,rgba(15,23,42,.12));padding-left:.4rem}.sa-topic-usage-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:.5rem}.sa-topic-usage-tile{background:var(--theme-bg,#f8fafc);border:1px solid var(--theme-border,rgba(15,23,42,.08));border-radius:8px;padding:.5rem .625rem}.sa-topic-usage-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.04em;color:var(--theme-text-muted,#64748b)}.sa-topic-usage-val{font-size:1.05rem;font-weight:700;color:var(--theme-text,#0f172a)}.sa-hero-error-flag{display:inline-flex;align-items:center;gap:.25rem;font-size:.85rem;font-weight:600;color:var(--theme-error,#dc2626)}