/* Content discovery uses the shared type and colour tokens in site.css. */
.discovery-shell .site-header { grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); }
.header-explainers { justify-self: end; color: var(--muted); font-size: .82rem; text-decoration: none; padding: .7rem 0; }
.header-explainers span { margin-left: .6rem; color: var(--signal); }
.site-nav a[aria-current="page"] { color: var(--signal); }
.discovery-main { max-width: var(--content); margin: 0 auto; padding: 0 var(--gutter); }
.discovery-intro { padding: clamp(2.5rem, 5vw, 4.5rem) 0 2.8rem; }
.discovery-intro .eyebrow, .library-intro .eyebrow { margin-bottom: 1.35rem; }
.discovery-intro h1, .library-intro h1 { margin: 0; color: var(--paper); font-family: var(--display); font-weight: 400; font-size: clamp(3.1rem, 6.5vw, 6.2rem); line-height: 1.02; letter-spacing: -.045em; }
.discovery-intro h1 em, .library-intro h1 em { color: var(--signal); font-weight: 400; }
.discovery-lede { max-width: 55rem; margin: 1rem 0 1.7rem; color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.2rem); line-height: 1.65; }
.discovery-search { display: flex; align-items: center; gap: 1rem; min-height: 66px; padding: .4rem .4rem .4rem 1.3rem; background: var(--paper); color: var(--ink); border: 1px solid var(--paper); }
.discovery-search:focus-within { outline: 2px solid var(--signal); outline-offset: 4px; }
.discovery-search > svg { flex: 0 0 24px; color: var(--muted-dark); }
.discovery-search input { width: 100%; min-width: 0; border: 0; outline: none; background: transparent; color: var(--ink); font-size: 1rem; padding: .7rem 0; }
.discovery-search input::placeholder { color: var(--muted-dark); opacity: 1; }
.discovery-search button { flex: 0 0 auto; display: flex; justify-content: center; align-items: center; gap: 2rem; min-height: 52px; padding: .7rem 1.5rem; border: 0; background: var(--ink); color: var(--paper); cursor: pointer; font-size: .88rem; font-weight: 600; }
.discovery-search button:hover { background: var(--ink-raised); color: var(--signal); }
.topic-browse { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1.4rem; margin-top: 1.25rem; scroll-margin-top: 110px; }
.topic-browse h2 { margin: 0; color: var(--muted); font: 500 .65rem/1.5 var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.topic-links { display: flex; flex-wrap: wrap; gap: .4rem 1.3rem; }
.topic-links a { display: inline-flex; align-items: center; gap: .6rem; min-height: 36px; color: var(--paper); font-size: .79rem; text-decoration: none; }
.topic-links a span { color: var(--muted-meta); }
.topic-links a:hover { color: var(--signal); }
.discovery-section { padding: 2.5rem 0 3rem; border-top: 1px solid var(--line-strong); }
.discovery-section__head { display: flex; justify-content: space-between; align-items: end; gap: 1.5rem; margin-bottom: 1.8rem; }
.discovery-section__head .section-index { margin: 0 0 .75rem; }
.discovery-section h2 { margin: 0; color: var(--paper); font: 400 clamp(2rem, 3.5vw, 3.2rem)/1.08 var(--display); letter-spacing: -.035em; }
.discovery-section__head > p { margin: 0; color: var(--muted); font-size: .85rem; line-height: 1.7; }
.text-link { display: inline-flex; align-items: center; gap: 1rem; min-height: 44px; color: var(--paper); font-size: .8rem; font-weight: 500; text-decoration: none; }
.text-link span { color: var(--signal); }
.text-link:hover { text-decoration: underline; text-underline-offset: .3em; }
.content-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.content-card { position: relative; display: flex; flex-direction: column; min-width: 0; padding: clamp(1.25rem, 2.2vw, 2rem); background: var(--paper); border: 1px solid var(--paper); color: var(--ink); transition: border-color .2s ease; }
.content-card:hover { border-color: var(--signal); }
.content-card__meta { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: .5rem 1rem; margin: 0 0 1.5rem; color: var(--muted-dark); font: 500 .65rem/1.5 var(--mono); letter-spacing: .02em; }
.content-card__meta > :first-child { color: var(--ink); }
.content-card h3 { margin: 0 0 1rem; font: 500 clamp(1.65rem, 2.4vw, 2.3rem)/1.1 var(--display); letter-spacing: -.035em; overflow-wrap: anywhere; }
.content-card h3 a { text-decoration: none; }
.content-card h3 a::after { position: absolute; inset: 0; content: ""; }
.content-card h3 a:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .13em; }
.content-card__description { margin: 0 0 1.3rem; font-size: .86rem; line-height: 1.65; }
.content-card__subtitle { margin: -.35rem 0 1rem; color: var(--muted-dark); font-size: .8rem; line-height: 1.5; }
.content-card__author { margin: auto 0 0; padding-top: .75rem; font-size: .78rem; font-weight: 600; line-height: 1.8; }
.content-card__author a, .content-card__related a, a.content-card__related, .content-card__action, .content-card__topics a { position: relative; z-index: 2; }
.content-card__author small { display: block; color: var(--muted-dark); font-size: .64rem; font-weight: 400; }
.content-card__assistance { display: block; margin: .3rem 0 0; color: var(--muted-dark); font-size: .66rem; line-height: 1.55; }
.content-card__topics { display: flex; flex-wrap: wrap; gap: .3rem .6rem; margin: 1rem 0; padding: 0; list-style: none; color: var(--muted-dark); font: 400 .63rem/1.6 var(--mono); }
.content-card__date, .content-card__research-year, .content-card__access { color: var(--muted-dark); font-size: .68rem; line-height: 1.6; }
.content-card__details { margin: 0 0 1rem; font-size: .73rem; line-height: 1.6; }
.content-card__details dt { color: var(--muted-dark); font-weight: 600; }
.content-card__details dd { margin: .2rem 0 .5rem; }
.content-card__related { display: block; margin: 1.3rem 0 0; padding-top: 1rem; border-top: 1px solid var(--muted-meta); font-size: .72rem; line-height: 1.6; }
.content-card__related a, a.content-card__related { text-underline-offset: .2em; }
.content-card__related small { display: block; font-size: .63rem; }
.content-card footer { margin-top: auto; }
.recent-section .content-card, .library-results .content-card { background: var(--ink-soft); border-color: var(--line-strong); color: var(--paper); }
.recent-section .content-card:hover, .library-results .content-card:hover { border-color: var(--signal); }
.recent-section .content-card__meta, .library-results .content-card__meta,
.recent-section .content-card__meta > :first-child, .library-results .content-card__meta > :first-child { color: var(--signal); }
.recent-section .content-card__description, .library-results .content-card__description,
.recent-section .content-card__assistance, .library-results .content-card__assistance,
.recent-section .content-card__topics, .library-results .content-card__topics,
.recent-section .content-card__date, .library-results .content-card__date,
.recent-section .content-card__access, .library-results .content-card__access,
.recent-section .content-card__research-year, .library-results .content-card__research-year,
.recent-section .content-card__subtitle, .library-results .content-card__subtitle,
.recent-section .content-card__author small, .library-results .content-card__author small,
.recent-section .content-card__details dt, .library-results .content-card__details dt { color: var(--muted); }
.recent-section .content-card__related, .library-results .content-card__related { border-color: var(--line-strong); }
.collection-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.collection-card { display: block; padding: 1.5rem; border: 1px solid var(--line-strong); text-decoration: none; }
.collection-card__number { display: flex; justify-content: space-between; color: var(--signal); font: .67rem/1.5 var(--mono); }
.collection-card h3 { margin: 1.4rem 0 .7rem; color: var(--paper); font: 400 1.8rem/1.15 var(--display); letter-spacing: -.02em; }
.collection-card p { max-width: 29ch; margin: 0; color: var(--muted); font-size: .8rem; line-height: 1.7; }
.collection-card:hover { background: var(--ink-raised); border-color: var(--signal); }
.discovery-about { display: flex; justify-content: space-between; align-items: center; gap: 2rem; padding: 2rem 0 3rem; border-top: 1px solid var(--line-strong); }
.discovery-about h2 { max-width: 28ch; margin: 0; color: var(--paper); font: 400 1.5rem/1.3 var(--display); letter-spacing: -.02em; }
.discovery-shell .site-footer { margin-top: 0; }
.library-intro { padding: 3.5rem 0 2rem; }
.library-intro h1 { font-size: clamp(3rem, 6vw, 5rem); }
.library-filters { display: grid; grid-template-columns: 1fr 1.4fr 1fr 1fr; gap: 1rem; margin-top: 1.5rem; }
.library-filters label { display: grid; gap: .65rem; color: var(--muted); font-size: .72rem; }
.library-filters select { width: 100%; min-width: 0; min-height: 46px; padding: .6rem 2rem .6rem .8rem; border: 1px solid var(--line-strong); border-radius: 0; background: var(--ink-soft); color: var(--paper); font: .82rem var(--sans); }
.library-results { padding: 0 0 4rem; }
.library-results__heading { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1rem; padding: 1rem 0 1.5rem; border-top: 1px solid var(--line-strong); }
.library-results__heading > div { min-width: 0; max-width: 100%; }
.library-results__heading h2 { overflow-wrap: anywhere; margin: 0; font: 400 1.6rem/1.25 var(--display); }
#result-count { margin: .5rem 0 0; color: var(--muted); font: .7rem/1.6 var(--mono); }
.text-button { padding: .7rem 0; min-height: 44px; border: 0; background: none; color: var(--paper); text-decoration: underline; text-underline-offset: .3em; cursor: pointer; font-size: .8rem; }
.library-pagination { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 2rem; font-size: .85rem; }
.library-pagination button { min-height: 44px; padding: .7rem 1rem; border: 1px solid var(--line-strong); background: var(--ink-soft); cursor: pointer; }
.library-pagination button:disabled { opacity: .4; cursor: default; }
.library-empty { padding: 2rem; background: var(--ink-soft); border: 1px solid var(--line-strong); }
.library-empty h3 { margin: 0; font: 400 2rem/1.2 var(--display); }
.library-empty p, .no-script-note { color: var(--muted); font-size: .9rem; line-height: 1.7; }
.no-script-note { padding: 1rem; border: 1px solid var(--line-strong); }
.discovery-shell a:focus-visible, .discovery-shell button:focus-visible, .discovery-shell select:focus-visible { outline: 2px solid var(--signal); outline-offset: 4px; }
.content-card h3 a:focus-visible { outline-color: var(--cyber-soft); }
@media (min-width: 901px) and (max-width: 1199px) {
  .content-grid, .collection-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .content-grid, .collection-grid { grid-template-columns: minmax(0, 1fr); }
  .content-card h3 { font-size: 2.25rem; }
  .discovery-section__head { align-items: start; }
  .discovery-intro { padding-top: 2.5rem; }
  .library-filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .discovery-shell .site-header { grid-template-columns: 1fr auto; gap: .8rem 1rem; }
  .header-explainers { display: none; }
}
@media (max-width: 600px) {
  .discovery-shell .site-header { grid-template-columns: 1fr; }
  .discovery-shell .site-nav { justify-content: space-between; gap: 1.3rem; width: 100%; }
  .discovery-shell .site-nav a { min-height: 32px; display: inline-flex; align-items: center; }
  .discovery-search { gap: .5rem; padding-left: .8rem; min-height: 58px; }
  .discovery-search > svg { display: none; }
  .discovery-search input { font-size: 16px; }
  .discovery-search button { min-height: 46px; padding: .7rem .9rem; gap: .6rem; }
  .discovery-search button span { display: none; }
  .discovery-section__head { display: block; }
  .discovery-section__head .text-link { margin-top: .75rem; }
  .discovery-section__head > p { margin-top: 1rem; }
  .discovery-about { flex-direction: column; align-items: start; gap: .8rem; }
  .library-filters { gap: 1rem .65rem; }
  .library-filters select { font-size: 16px; }
  .content-card h3 { font-size: 2rem; }
  .library-pagination { gap: .5rem; font-size: .75rem; }
  .library-pagination button { padding: .7rem; }
}
@media (prefers-reduced-motion: reduce) { .content-card { transition: none; } }
/* Card metadata and navigation shared with About and the article collection. */
.content-card__author-label { display: block; font-size: .64rem; font-weight: 400; }
.content-card__dates { display: grid; gap: .25rem; margin: .9rem 0 0; font-size: .65rem; line-height: 1.6; color: var(--muted-dark); }
.content-card__dates time { white-space: nowrap; }
.content-card__methodology { margin: .2rem 0 1rem; font-size: .74rem; line-height: 1.6; }
.content-card__topics { margin-bottom: 0; }
.recent-section .content-card__dates, .library-results .content-card__dates,
.recent-section .content-card__author-label, .library-results .content-card__author-label { color: var(--muted); }
@media (max-width: 1180px) {
  .site-header .site-nav { display: flex; }
  .site-header { grid-template-columns: 1fr auto; }
  .site-header .edition, .header-explainers { display: none; }
  .discovery-shell .site-header { grid-template-columns: 1fr auto; }
}
@media (max-width: 600px) {
  .site-header, .discovery-shell .site-header { grid-template-columns: 1fr; gap: .6rem; }
  .site-header .site-nav { justify-content: space-between; width: 100%; gap: 1rem; }
  .site-header .site-nav a { display: inline-flex; align-items: center; min-height: 32px; }
}
@media print {
  .discovery-search, .topic-browse, .library-filters, .library-pagination, .text-button { display: none !important; }
  .discovery-main { padding: 1rem; }
  .discovery-shell, .discovery-shell h1, .discovery-shell h2, .discovery-shell h3, .discovery-shell p, .discovery-shell a { color: var(--ink); }
  .content-grid { display: block; }
  .content-card, .recent-section .content-card, .library-results .content-card { color: var(--ink); background: var(--paper); border-color: var(--muted-dark); margin-bottom: 1rem; break-inside: avoid; }
}
.content-card__dates { display: flex; flex-wrap: wrap; gap: .3rem .5rem; }
.content-card__topics a { display: inline-flex; align-items: center; min-height: 28px; }
.content-card__related { min-height: 44px; }
@media (max-width: 420px) { .library-filters { grid-template-columns: minmax(0, 1fr); } }
/* Shared navigation: Collection and About. */
@media (min-width: 601px) { .site-header, .discovery-shell .site-header { grid-template-columns: minmax(0, 1fr) auto; } }
.collection-invitation { display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.collection-invitation p:not(.section-index) { color: var(--muted); font-size: .9rem; line-height: 1.7; }
.collection-invitation .button { flex: 0 0 auto; }
@media (max-width: 600px) { .collection-invitation { display: block; } .collection-invitation .button { margin-top: .5rem; } }
/* Collection: one search workspace, with secondary filters on demand. */
.primary-filters { grid-template-columns: 1fr 1.4fr 1fr; }
.search-help { color: var(--muted); font-size: .8rem; line-height: 1.65; margin: .85rem 0; }
.advanced-filters { margin-top: 1rem; border-bottom: 1px solid var(--line-strong); padding-bottom: 1rem; }
.advanced-filters summary { cursor: pointer; width: fit-content; min-height: 44px; align-content: center; font-size: .82rem; }
.advanced-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: .6rem; }
.library-filters label { min-width: 0; }
.library-filters input { width: 100%; min-width: 0; min-height: 46px; padding: .6rem .8rem; border: 1px solid var(--line-strong); background: var(--ink-soft); color: var(--paper); color-scheme: dark; font: .82rem var(--sans); box-sizing: border-box; }
#topic-discovery { padding-bottom: 4rem; }
#topic-discovery .library-results__heading p { color: var(--muted); font-size: .85rem; }
.result-actions { display: flex; gap: 1.25rem; align-items: center; }
.active-filters { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.active-filters:empty { display: none; }
.active-filters button { font: .75rem/1.5 var(--sans); text-align: left; min-height: 36px; max-width: 100%; color: var(--paper); border: 1px solid var(--line-strong); background: var(--ink-soft); padding: .4rem .7rem; cursor: pointer; overflow-wrap: anywhere; }
.content-card__audio { position: relative; z-index: 2; }
.content-card__audio audio { display: block; width: 100%; margin: .7rem 0; }
.content-card__audio a { display: inline-flex; min-height: 36px; align-items: center; font-size: .8rem; }
.content-card__audio p { color: var(--muted); font-size: .72rem; line-height: 1.5; }
@media (max-width: 800px) { .advanced-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .primary-filters, .advanced-grid { grid-template-columns: minmax(0, 1fr); } .library-filters input { font-size: 16px; } }