/* The catalog: search box, left filters, result cards. */
.catalog-page{--c:var(--c-ai);--c-soft:var(--c-ai-soft);--c-ink:var(--c-ai-ink)}
.cat-search{display:flex;gap:10px;margin-bottom:12px}
.cat-search input{flex:1;padding:16px 20px;border-radius:99px;border:2px solid var(--line-2);background:#fff;font:500 18px var(--sans);min-height:56px}
.cat-search input:focus{outline:3px solid var(--saffron);outline-offset:2px;border-color:var(--indigo)}
.cat-ideas{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px}.cat-ideas a{padding:7px 14px;border-radius:99px;background:var(--c-soft);color:var(--c-ink);font-weight:600;font-size:14px;text-decoration:none}.cat-ideas a:hover{background:var(--c);color:#fff}
.cat-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:28px;align-items:start}
.cat-filters{position:sticky;top:96px;max-height:calc(100vh - 120px);overflow:auto;padding:16px 18px;border-radius:20px;background:var(--card);border:1px solid var(--line)}
.cat-filter-wrap>summary{display:flex;justify-content:space-between;align-items:center;font:800 13px var(--sans);letter-spacing:.1em;text-transform:uppercase;cursor:pointer;list-style:none}
.cat-filter-wrap>summary::-webkit-details-marker{display:none}
.cat-group{border:0;margin:14px 0 0;padding:0;display:grid;gap:4px}.cat-group legend{font:700 14px var(--sans);padding:0;margin-bottom:6px}
.cat-group label{display:flex;gap:8px;align-items:center;font-size:14.5px;cursor:pointer}.cat-group label.off{opacity:.45}.cat-group small{margin-left:auto;color:var(--mute);font-weight:600}
.cat-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}.cat-bar label{display:flex;gap:8px;align-items:center;font-weight:600;font-size:14px}.cat-bar select{padding:8px 10px;border-radius:10px;border:1.5px solid var(--line-2);background:#fff;font:inherit}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.cat-card{display:grid;gap:5px;align-content:start;padding:18px;border-radius:20px;background:var(--card);border:1px solid var(--line);border-top:4px solid var(--c);text-decoration:none;color:inherit;transition:transform .18s var(--ease,ease),box-shadow .18s}
.cat-card[data-s=maths]{--c:var(--c-maths)}.cat-card[data-s=coding]{--c:var(--c-coding)}.cat-card[data-s=cube]{--c:var(--c-cubing)}.cat-card[data-s=logic]{--c:var(--c-ai)}.cat-card[data-s=more]{--c:var(--c-tools)}
.cat-card:hover{transform:translateY(-3px);box-shadow:0 16px 30px -22px rgba(29,40,86,.5)}
.cat-ico{font-size:26px}.cat-type{font:800 11px var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--mute)}
.cat-card b{font:700 16.5px/1.3 var(--sans)}.cat-desc{font-size:14px;color:var(--ink-2)}.cat-meta{font-size:13px;color:var(--mute);font-weight:600}
.cat-none{grid-column:1/-1;padding:30px;text-align:center;color:var(--ink-2)}
.cat-more{text-align:center;margin-top:18px}
@media(max-width:900px){.cat-layout{grid-template-columns:1fr}.cat-filters{position:static;max-height:none}}