.index-main, .home-main { min-height: 55vh; }
.page-intro { padding: clamp(2.5rem, 6vw, 5.2rem) 0 clamp(2rem, 4vw, 3rem); max-width: 820px; }
.page-intro h1, .hero h1 { margin: 0; font-size: var(--text-3xl); line-height: 1.08; letter-spacing: -.035em; }
.page-intro .lead { max-width: 780px; }
.hero { padding: clamp(3rem, 7vw, 6rem) 0; background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%); border-bottom: 1px solid var(--color-border); }
.hero__grid { display: grid; grid-template-columns: minmax(0,1.65fr) minmax(280px,.75fr); gap: clamp(2rem,5vw,5rem); align-items: start; }
.hero h1 { max-width: 820px; }
.hero .lead { max-width: 760px; margin: 1.25rem 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1.6rem; }
.trust-panel { padding: var(--space-6); background: var(--color-surface); border: 1px solid var(--color-border); border-top: 4px solid var(--color-accent); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.trust-panel h2 { margin-top: 0; font-size: var(--text-xl); }
.trust-panel dl { margin: 0 0 1rem; }
.trust-panel dl div { padding: .8rem 0; border-top: 1px solid var(--color-border); }
.trust-panel dt { font-weight: 800; }
.trust-panel dd { margin: .2rem 0 0; color: var(--color-text-muted); font-size: var(--text-sm); }
.home-section { padding: clamp(3rem,6vw,5.5rem) 0; }
.home-section--muted { background: var(--color-surface-muted); border-block: 1px solid var(--color-border); }
.section-heading { margin-bottom: var(--space-6); display: flex; justify-content: space-between; align-items: end; gap: 1rem; }
.section-heading h2 { margin: 0; font-size: var(--text-2xl); letter-spacing: -.025em; }
.material-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: var(--space-6); }
.material-grid--three { grid-template-columns: repeat(3,minmax(0,1fr)); }
.material-grid--two { grid-template-columns: repeat(2,minmax(0,1fr)); }
.material-card { overflow: hidden; min-width: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); transition: transform .18s ease, box-shadow .18s ease; }
.material-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.material-card img { display: block; width: 100%; aspect-ratio: 16/9; object-fit: cover; background: var(--color-surface-muted); }
.material-card__body { padding: var(--space-5); }
.material-card h2 { margin: .25rem 0 .65rem; font-size: var(--text-xl); line-height: 1.24; letter-spacing: -.018em; }
.material-card h2 a { color: var(--color-text); text-decoration: none; }
.material-card p { margin: .45rem 0; color: var(--color-text-muted); }
.material-card .eyebrow { color: var(--color-accent); }
.card-meta { font-size: var(--text-sm); }
.split-feature { display: grid; grid-template-columns: .7fr 1.3fr; gap: var(--space-10); align-items: center; }
.feature-links { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--space-6); }
.feature-links article { padding: var(--space-6); border-top: 3px solid var(--color-accent); background: var(--color-surface); }
.feature-links h2 { margin: .25rem 0 .6rem; font-size: var(--text-xl); }
.archive-principle { display: grid; grid-template-columns: 1.1fr 1.3fr auto; gap: var(--space-8); align-items: center; }
.archive-principle h2 { margin: 0; font-size: var(--text-2xl); }
.archive-principle .button + .button { margin-left: .35rem; }
.topic-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: .75rem; margin: 0 0 var(--space-10); }
.topic-grid a { min-height: 120px; display: flex; flex-direction: column; justify-content: space-between; padding: var(--space-5); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); text-decoration: none; }
.topic-grid strong { color: var(--color-text); font-size: var(--text-lg); }
.topic-grid span { color: var(--color-text-muted); font-size: var(--text-sm); }
.filter-bar { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 var(--space-8); }
.filter-bar button { min-height: 44px; padding: .55rem .9rem; border: 1px solid var(--color-border); border-radius: 999px; background: var(--color-surface); color: var(--color-text); cursor: pointer; }
.filter-bar button[aria-pressed="true"] { border-color: var(--color-accent); background: var(--color-accent); color: #fff; }
.archive-group { margin: 0 0 var(--space-10); }
.archive-group h2 { padding-bottom: .6rem; border-bottom: 2px solid var(--color-text); font-size: var(--text-xl); }
.archive-list { margin: 0; padding: 0; list-style: none; }
.archive-list li { display: grid; grid-template-columns: 7.4rem 8.5rem 1fr; gap: .7rem 1rem; padding: .85rem 0; border-bottom: 1px solid var(--color-border); align-items: baseline; }
.archive-list time, .archive-list span { color: var(--color-text-muted); font-size: var(--text-sm); }
.archive-list a { font-weight: 700; }
.chronicle-intro { max-width: 800px; margin: 0 0 var(--space-10); padding: var(--space-6); border-left: 4px solid var(--color-accent); background: var(--color-accent-soft); }
.search-form { max-width: 800px; margin-bottom: var(--space-6); }
.search-form label { display: block; margin-bottom: .4rem; font-weight: 800; }
.search-form > div { display: flex; gap: .6rem; }
.search-form input { min-width: 0; flex: 1; min-height: 48px; padding: .7rem .85rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); }
.search-results { display: grid; gap: 1rem; }
.search-result { padding: var(--space-5); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.search-result h2 { margin: .2rem 0 .4rem; font-size: var(--text-xl); }
.error-card { margin: 5rem auto; padding: clamp(2rem,6vw,4rem); text-align: center; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.error-card h1 { font-size: var(--text-3xl); margin: .2rem 0; }
/* Desktop composition: mobile rules below remain unchanged. */
@media (min-width: 901px) {
  .hero { padding-block: 4.75rem; }
  .hero__grid { gap: clamp(3rem, 4vw, 4.5rem); }
  .home-section { padding-block: 4rem; }
  .split-feature { grid-template-columns: minmax(260px,.72fr) minmax(0,1.28fr); gap: 3.5rem; }
  .split-feature > :first-child { max-width: 24rem; }
  .material-grid--three .material-card h2 { font-size: clamp(1.3rem,1.18rem + .28vw,1.5rem); line-height: 1.27; }
  .feature-links h2 { font-size: clamp(1.35rem,1.2rem + .3vw,1.55rem); line-height: 1.25; }
  .archive-principle { grid-template-columns: minmax(0,1.2fr) minmax(0,1fr) auto; gap: 2.5rem; }
  .archive-principle h2 { font-size: clamp(1.8rem,1.6rem + .45vw,2.15rem); line-height: 1.22; }
  .archive-principle__actions { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: flex-end; }
  .archive-principle .button + .button { margin-left: 0; }
}
.archive-tools { max-width: 860px; margin: 0 0 var(--space-6); display: grid; gap: .8rem; }
.archive-search label { display: block; margin-bottom: .35rem; font-weight: 800; }
.archive-search input { width: 100%; min-height: 48px; padding: .7rem .85rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); }
.archive-status { margin: 0 0 var(--space-6); color: var(--color-text-muted); font-size: var(--text-sm); }
.current-state { margin: 0 0 var(--space-8); padding: var(--space-6); border: 1px solid var(--color-border); border-top: 4px solid var(--color-accent); border-radius: var(--radius-md); background: var(--color-surface); }
.current-state h2 { margin: 0 0 .65rem; font-size: var(--text-xl); }
.current-state p { max-width: 72ch; }
@media (max-width: 900px) {
  .hero__grid, .split-feature, .archive-principle { grid-template-columns: 1fr; }
  .material-grid--three, .feature-links, .topic-grid { grid-template-columns: repeat(2,1fr); }
  .archive-principle { align-items: start; }
}
@media (max-width: 640px) {
  .material-grid, .material-grid--three, .material-grid--two, .feature-links, .topic-grid { grid-template-columns: 1fr; }
  .section-heading { align-items: start; flex-direction: column; }
  .archive-list li { grid-template-columns: 6.6rem 1fr; }
  .archive-list li a { grid-column: 1 / -1; }
  .search-form > div { flex-direction: column; }
}
.chronicle-filters { margin: 0 0 var(--space-6); }
.chronicle-filters__label { margin: 0 0 .6rem; font-weight: 800; }

.archive-facets { max-width: 980px; margin: 0 0 var(--space-6); display: grid; gap: var(--space-4); }
.filter-group { min-width: 0; margin: 0; padding: 0; border: 0; }
.filter-group legend { margin: 0 0 .45rem; font-size: var(--text-sm); font-weight: 800; }
.filter-group .filter-bar { margin-bottom: 0; }
.filter-count { display: inline-flex; min-width: 1.45rem; height: 1.45rem; align-items: center; justify-content: center; margin-left: .3rem; padding-inline: .3rem; border-radius: 999px; background: var(--color-surface-muted); color: var(--color-text-muted); font-size: .75rem; }
.filter-bar button[aria-pressed="true"] .filter-count { background: rgba(255,255,255,.2); color: #fff; }
.filter-bar button:disabled { opacity: .48; cursor: not-allowed; }
.archive-reset { justify-self: start; }
.archive-secondary-link { grid-column: 3; font-size: var(--text-sm); font-weight: 500 !important; }
.search-result--suggestion { border-style: dashed; }
@media (max-width: 640px) { .archive-secondary-link { grid-column: 1 / -1; } }