* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 var(--font-sans); }
button, input, select { font: inherit; }
a { color: var(--link); text-underline-offset: .2em; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
.skip-link { position: fixed; z-index: 10; top: .5rem; left: .5rem; padding: .5rem .8rem; border-radius: .25rem; background: var(--surface); transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.masthead { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .6rem 1.5rem; padding: .85rem max(1.25rem, calc((100vw - 76rem) / 2)); border-bottom: 1px solid var(--line); background: var(--surface); }
.header-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 1.2rem; min-width: 0; margin-left: auto; }
.brand { color: var(--heading); font: 700 1.4rem/1.2 var(--font-display); letter-spacing: .08em; text-decoration: none; text-transform: uppercase; white-space: nowrap; }
.brand span { color: var(--gold); }
.masthead nav { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; min-width: 0; }
.masthead nav a { color: var(--muted); font-size: .88rem; font-weight: 700; text-decoration: none; }
.masthead nav a:hover, .masthead nav a[aria-current="page"] { color: var(--accent); text-decoration: underline; }
.catalog { width: min(100%, 78.5rem); margin: 0 auto; padding: clamp(1.75rem, 4vw, 3.5rem) 1.25rem 6rem; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: 2.5rem; color: var(--muted); font-size: .8rem; }
.breadcrumbs a { color: var(--muted); }
.separator { color: var(--line); }
.intro { max-width: 50rem; padding: 0 0 clamp(2rem, 5vw, 4rem); }
.eyebrow { margin: 0 0 .75rem; color: var(--gold); font-size: .7rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.intro h1 { margin: 0; color: var(--heading); font: 700 clamp(2.8rem, 6vw, 5rem)/1.06 var(--font-display); letter-spacing: -.045em; }
.description { margin: 1.25rem 0 0; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); line-height: 1.55; }
.section { padding: 1.4rem 0 2.5rem; border-top: 1px solid var(--line); }
.section-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .25rem 1rem; margin-bottom: 1.25rem; }
.section h2 { margin: 0; color: var(--heading); font: 700 1.65rem/1.25 var(--font-display); letter-spacing: -.025em; }
.section-heading > a { font-size: .85rem; font-weight: 700; }
.count { margin: .25rem 0 0; color: var(--muted); font-size: .8rem; }
.category-grid, .material-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr)); gap: 1rem; }
.category-card, .material-card { min-width: 0; padding: 1.4rem; border: 1px solid var(--line); border-radius: .35rem; background: var(--surface); overflow-wrap: anywhere; }
.category-card h3, .material-card h3 { margin: 0; font: 700 1.35rem/1.25 var(--font-display); letter-spacing: -.02em; }
.category-card h3 a, .material-card h3 a { text-decoration: none; }
.category-card h3 a:hover, .material-card h3 a:hover { text-decoration: underline; }
.category-card p, .card-description { margin: .7rem 0 1.3rem; color: var(--muted); font-size: .9rem; }
.card-count, .card-meta, .card-foot { color: var(--muted); font-size: .74rem; }
.card-count { display: block; margin-top: 1.1rem; font-weight: 700; }
.card-meta { display: flex; flex-wrap: wrap; gap: .3rem .8rem; margin: 0 0 .7rem; font-weight: 750; letter-spacing: .06em; text-transform: uppercase; }
.card-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .3rem .8rem; margin-top: 1.5rem; padding-top: .85rem; border-top: 1px solid var(--line); }
.card-foot a { font-weight: 700; }
.audiences { overflow-wrap: anywhere; }
.filters { display: grid; grid-template-columns: minmax(12rem, 2fr) repeat(3, minmax(9rem, 1fr)) auto; align-items: end; gap: .7rem; margin: 0 0 1.5rem; padding: 1rem; border: 1px solid var(--line); border-radius: .35rem; background: var(--surface); }
.filters label { display: block; min-width: 0; font-size: .75rem; font-weight: 750; }
.filters input, .filters select { display: block; width: 100%; margin-top: .25rem; padding: .53rem .65rem; border: 1px solid var(--line); border-radius: .25rem; background: var(--paper); color: var(--ink); }
.filters input::placeholder { color: var(--muted); opacity: 1; }
.filters button { padding: .56rem .8rem; border: 1px solid var(--line); border-radius: .25rem; background: var(--surface); color: var(--accent); font-size: .8rem; font-weight: 750; cursor: pointer; }
.filters button:hover { background: var(--accent-soft); }
.empty { padding: 1.5rem; border: 1px dashed var(--line); border-radius: .35rem; color: var(--muted); }
@media (max-width: 900px) { .filters { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) {
  .masthead { padding: .75rem 1rem; }
  .catalog { padding-right: 1rem; padding-left: 1rem; }
  .filters { grid-template-columns: minmax(0, 1fr); }
  .breadcrumbs { margin-bottom: 1.5rem; }
}
@media print {
  .masthead, .filters, .skip-link { display: none; }
  .catalog { width: 100%; padding: 0; }
  .category-card, .material-card { break-inside: avoid; }
}