.catalog-header { padding-bottom: 2rem; }
.catalog-header .lead { max-width: 54rem; }
.catalog-header .source-note { max-width: 50rem; }
.catalog-filters { display: grid; grid-template-columns: 2fr 1.2fr 1.2fr 1.5fr; gap: 1rem; padding: 1.5rem; background: var(--surface); border: 1px solid var(--line); }
.catalog-filters label { display: block; font-size: .8rem; font-weight: 700; text-transform: uppercase; margin-bottom: .5rem; }
.catalog-filters input, .catalog-filters select { width: 100%; min-width: 0; min-height: 2.8rem; }
.catalog-filters > div { min-width: 0; }
.catalog-filters button { width: auto; justify-self: start; }
.catalog-results-heading { margin-top: 2.5rem; }
.catalog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.catalog-card { padding: 1.5rem; background: var(--surface); border: 1px solid var(--line); display: flex; flex-direction: column; min-width: 0; }
.catalog-card h3 { font-size: 1.4rem; margin: .4rem 0 .6rem; }
.catalog-card h3 a { text-decoration: none; }
.catalog-card h3 a:hover { text-decoration: underline; }
.catalog-card p { overflow-wrap: anywhere; }
.catalog-company { font-weight: 600; font-size: .9rem; }
.catalog-card__use { font-size: .9rem; }
.catalog-card .source-note { margin-top: 0; padding-top: 1rem; font-size: .8rem; }
.catalog-empty { grid-column: 1 / -1; padding: 2rem; border: 1px solid var(--line); }
.catalog-pagination { display: flex; justify-content: center; gap: 2rem; margin-top: 2rem; }
.catalog-method { margin-top: 3rem; max-width: 55rem; border-top: 1px solid var(--line); padding-top: 1.5rem; }
.catalog-detail { max-width: 58rem; margin: 0 auto; }
.catalog-source, .catalog-family-note { padding: 1.5rem; background: var(--surface); border-left: 4px solid #b8f24a; }
@media (max-width: 1000px) { .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .catalog-filters { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .catalog-grid, .catalog-filters { grid-template-columns: minmax(0, 1fr); } .catalog-card { padding: 1.2rem; } .catalog-pagination { gap: 1rem; flex-wrap: wrap; } }

.catalog-categories .directory-browse-nav__links { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.catalog-categories .catalog-category-icon { width: 1.5rem; height: 1.5rem; color: var(--accent-deep); }
@media (max-width: 864px) { .catalog-categories .directory-browse-nav__links { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.catalog-usecases { padding-top: 1.5rem; }
.catalog-usecases h2 { font-size: 1rem; text-transform: uppercase; margin: 0 0 .75rem; }
.catalog-usecase-links { display: flex; flex-wrap: wrap; gap: .6rem; }
.catalog-usecase-links a { display: inline-flex; align-items: center; gap: .5rem; padding: .65rem .85rem; border: 1px solid var(--line); background: var(--surface); font-weight: 600; text-decoration: none; }
.catalog-usecase-links a:hover, .catalog-usecase-links a[aria-current] { border-color: var(--accent-deep); background: var(--accent); color: var(--ink); }
.catalog-usecase-links .icon { flex-shrink: 0; width: 1.15rem; height: 1.15rem; }
.catalog-collection-summary { max-width: 52rem; margin-bottom: 1.5rem; }
.catalog-card__use { border-top: 1px solid var(--line); padding-top: 1rem; }
.catalog-card__action { margin-top: auto; padding-top: 1rem; font-weight: 700; }

.catalog-categories .directory-browse-nav__links { display: grid; gap: .75rem; }
.catalog-categories .directory-browse-nav__links a { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1rem; border: 1px solid var(--line); background: var(--surface); text-decoration: none; }
.catalog-categories .directory-browse-nav__links a:hover { border-color: var(--accent-deep); }
@media (max-width: 600px) { .catalog-categories .directory-browse-nav__links { grid-template-columns: minmax(0, 1fr); } }