/*
 * collections.css — Uganda Museums
 * Phase 4: Collections & Artefacts Templates
 * KGM-Inspired Light Editorial — Light Theme
 *
 * Sections:
 *   A.  Shared utilities (page hero, breadcrumb, editorial content)
 *   B.  Archive layout (filter sidebar + collection grid)
 *   C.  Filter sidebar components
 *   D.  Collection archive card
 *   E.  Collection grid states (loading, empty, pagination)
 *   F.  Single collection page
 *   G.  ACF Gallery lightbox
 *   H.  Artefact card
 *   I.  Single artefact — catalogue layout
 *   J.  Lightbox modal
 *   K.  Responsive
 */

/* ════════════════════════════════════════════════════════
   A. SHARED UTILITIES
════════════════════════════════════════════════════════ */

/* Page hero — used on archive-collection.php and can be reused */
.page-hero {
    background-color: var(--bg-section);
    padding: 4rem 0 3rem;
    border-bottom: 1px solid var(--border-medium);
}

.page-hero__title {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 4vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    margin: 0.75rem 0 1rem;
}

.page-hero__title em {
    font-style: italic;
    color: var(--terracotta);
}

.page-hero__desc {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.75;
    max-width: 620px;
}

/* Breadcrumb — light and dark variants */
.breadcrumb { margin-bottom: 1.5rem; }

.breadcrumb__list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0;
    list-style: none;
    padding: 0;
    margin: 0;
}

.breadcrumb__item {
    display: flex;
    align-items: center;
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.breadcrumb__item::after {
    content: '/';
    margin: 0 0.5rem;
    opacity: 0.4;
}

.breadcrumb__item:last-child::after { display: none; }

.breadcrumb__item a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}
.breadcrumb__item a:hover { color: var(--terracotta); }

.breadcrumb__item--active { color: var(--text-primary); font-weight: 500; }

/* Light breadcrumb variant (used on dark hero backgrounds) */
.breadcrumb--light .breadcrumb__item,
.breadcrumb--light .breadcrumb__item a { color: rgba(255,255,255,0.65); }
.breadcrumb--light .breadcrumb__item a:hover { color: rgba(255,255,255,0.95); }
.breadcrumb--light .breadcrumb__item--active { color: rgba(255,255,255,0.95); }

/* Editorial content (WordPress post content + ACF description) */
.editorial-content { line-height: 1.82; }

.editorial-content p {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 300;
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
}

.editorial-content h2,
.editorial-content h3 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-primary);
    margin: 2rem 0 0.75rem;
}

.editorial-content h2 { font-size: 1.6rem; }
.editorial-content h3 { font-size: 1.25rem; }

.editorial-content blockquote {
    border-left: 3px solid var(--terracotta);
    padding-left: 1.2rem;
    margin: 1.5rem 0;
    font-family: var(--font-heading);
    font-style: italic;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.editorial-content a { color: var(--terracotta); }
.editorial-content a:hover { color: var(--terracotta-light); }

.editorial-content img {
    max-width: 100%;
    border-radius: var(--border-radius-lg);
    height: auto;
}


/* ════════════════════════════════════════════════════════
   B. ARCHIVE LAYOUT — sidebar + grid
════════════════════════════════════════════════════════ */

.archive-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    padding-top: 3rem;
    padding-bottom: 5rem;
    align-items: start;
}


/* ════════════════════════════════════════════════════════
   C. FILTER SIDEBAR
════════════════════════════════════════════════════════ */

.filter-sidebar {
    position: sticky;
    top: calc(var(--header-height) + var(--quick-bar-height) + 1rem);
    background-color: var(--bg-warm);
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
}

/* Mobile toggle button — hidden on desktop */
.filter-sidebar__toggle {
    display: none;
    width: 100%;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    text-align: left;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    gap: 0.5rem;
}

.filter-sidebar__active-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--terracotta);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    margin-left: auto;
}

.filter-sidebar__inner { padding: 1.5rem; }

/* Each filter group */
.filter-group { margin-bottom: 1.8rem; }
.filter-group:last-child { margin-bottom: 0; }

.filter-group__label {
    display: block;
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

/* Search input */
.filter-search-wrap {
    position: relative;
}

.filter-search {
    width: 100%;
    padding: 0.65rem 0.9rem 0.65rem 2.2rem;
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    font-size: 0.82rem;
    color: var(--text-primary);
    background-color: #fff;
    outline: none;
    transition: border-color var(--transition-fast);
}
.filter-search:focus {
    border-color: var(--terracotta);
    box-shadow: 0 0 0 3px rgba(160,82,45,0.08);
}
.filter-search::placeholder { color: var(--text-muted); }

.filter-search__icon {
    position: absolute;
    left: 0.65rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* Radio pills */
.filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.filter-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.35rem 0.75rem;
    background-color: #fff;
    border: 1.5px solid var(--border-medium);
    border-radius: 20px;
    font-family: var(--font-body);
    font-size: 0.78rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast);
    user-select: none;
}

.filter-pill:hover {
    border-color: var(--terracotta);
    color: var(--terracotta);
}

/* Active pill (JS adds .filter-pill--active) */
.filter-pill--active,
.filter-pill:has(input:checked) {
    background-color: var(--terracotta);
    border-color: var(--terracotta);
    color: #fff;
}

.filter-pill__count {
    font-size: 0.65rem;
    opacity: 0.7;
}

/* Checkbox list */
.filter-checklist {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.82rem;
    color: var(--text-secondary);
    padding: 0.2rem 0;
}

.filter-checkbox__input { position: absolute; opacity: 0; width: 0; height: 0; }

.filter-checkbox__box {
    width: 16px;
    height: 16px;
    border: 1.5px solid var(--border-medium);
    border-radius: 3px;
    flex-shrink: 0;
    display: grid;
    place-content: center;
    background-color: #fff;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.filter-checkbox__input:checked + .filter-checkbox__box {
    background-color: var(--terracotta);
    border-color: var(--terracotta);
}

.filter-checkbox__input:checked + .filter-checkbox__box::after {
    content: '';
    display: block;
    width: 8px;
    height: 4px;
    border-left: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotate(-45deg) translateY(-1px);
}

/* Clear button */
.filter-sidebar__clear {
    width: 100%;
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-light);
    padding-top: 1.2rem;
}


/* ════════════════════════════════════════════════════════
   D. COLLECTION ARCHIVE CARD
════════════════════════════════════════════════════════ */

/* Results bar */
.results-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.results-bar__count {
    font-family: var(--font-body);
    font-size: 0.82rem;
    color: var(--text-muted);
}
.results-bar__count strong { color: var(--text-primary); }

.results-bar__select {
    font-family: var(--font-body);
    font-size: 0.78rem;
    color: var(--text-secondary);
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius);
    padding: 0.4rem 0.7rem;
    background-color: #fff;
    outline: none;
    cursor: pointer;
}
.results-bar__select:focus { border-color: var(--terracotta); }

/* 3-column collection card grid */
.collection-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* Individual archive card */
.coll-archive-card {
    background-color: #fff;
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}
.coll-archive-card:hover {
    border-color: var(--terracotta);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* Card link resets */
.coll-archive-card__link {
    display: block;
    text-decoration: none;
    color: inherit;
}

/* Image area — fixed 3:2 ratio */
.coll-archive-card__image-wrap {
    position: relative;
    aspect-ratio: 3 / 2;
    overflow: hidden;
    background-color: var(--bg-section);
}

.coll-archive-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
}
.coll-archive-card:hover .coll-archive-card__image { transform: scale(1.04); }

/* Colour-coded placeholder backgrounds */
.coll-placeholder--archaeology {
    background: linear-gradient(160deg, #D4A574, #A0522D);
}
.coll-placeholder--ethnology {
    background: linear-gradient(160deg, #6B9B6B, #2C4A3E);
}
.coll-placeholder--natural-history {
    background: linear-gradient(160deg, #7BA7BC, #3D6B7A);
}
.coll-placeholder--historical {
    background: linear-gradient(160deg, #C4A882, #7A6040);
}

.coll-archive-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    inset: 0;
}

.coll-archive-card__placeholder-icon { font-size: 3rem; opacity: 0.5; }

/* Category pill — top-left overlay */
.coll-archive-card__cat-pill {
    position: absolute;
    top: 0.85rem;
    left: 0.85rem;
    background-color: var(--terracotta);
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.3rem 0.65rem;
    border-radius: 20px;
    z-index: 2;
}

/* Artefact count — top-right overlay */
.coll-archive-card__count-badge {
    position: absolute;
    top: 0.85rem;
    right: 0.85rem;
    background-color: rgba(26,26,24,0.72);
    color: rgba(255,255,255,0.9);
    font-family: var(--font-body);
    font-size: 0.62rem;
    font-weight: 600;
    padding: 0.28rem 0.6rem;
    border-radius: 20px;
    backdrop-filter: blur(6px);
    z-index: 2;
}

/* Card body */
.coll-archive-card__body { padding: 1.4rem; }

.coll-archive-card__period {
    font-family: var(--font-body);
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin-bottom: 0.4rem;
}

.coll-archive-card__title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

.coll-archive-card__excerpt {
    font-family: var(--font-body);
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.65;
    font-weight: 300;
}

/* "Explore →" CTA — fades in on card hover */
.coll-archive-card__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.85rem;
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--terracotta);
    opacity: 0;
    transform: translateY(4px);
    transition: opacity var(--transition-base), transform var(--transition-base);
}
.coll-archive-card:hover .coll-archive-card__cta {
    opacity: 1;
    transform: translateY(0);
}


/* ════════════════════════════════════════════════════════
   E. COLLECTION GRID STATES
════════════════════════════════════════════════════════ */

/* Loading overlay */
.collection-loading[hidden] { display: none; } .collection-loading {
    position: absolute;
    inset: 0;
    background-color: rgba(255,255,255,0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: var(--border-radius-xl);
}

.collection-main { position: relative; background-color: var(--bg-white); }

.collection-loading__spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border-medium);
    border-top-color: var(--terracotta);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Empty state */
.collections-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
}

.collections-empty__icon {
    font-size: 3rem;
    opacity: 0.3;
    margin-bottom: 1rem;
    display: block;
}

.collections-empty__title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.collections-empty__desc {
    font-family: var(--font-body);
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* Pagination */
.collections-pagination { margin-top: 3rem; }

.collections-pagination .page-numbers {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    flex-wrap: wrap;
    padding: 0;
}

.collections-pagination .page-numbers li { display: block; }

.collections-pagination .page-numbers a,
.collections-pagination .page-numbers span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 0.75rem;
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.collections-pagination .page-numbers a:hover {
    border-color: var(--terracotta);
    color: var(--terracotta);
}

.collections-pagination .page-numbers .current {
    background-color: var(--terracotta);
    border-color: var(--terracotta);
    color: #fff;
}

.collections-pagination .page-numbers .prev,
.collections-pagination .page-numbers .next {
    font-size: 0.78rem;
}


/* ════════════════════════════════════════════════════════
   F. SINGLE COLLECTION PAGE
════════════════════════════════════════════════════════ */

/* Hero — uses CSS custom property for background image */
.single-coll-hero {
    position: relative;
    min-height: 340px;
    display: flex;
    align-items: flex-end;
    padding: 0;
    background:
        var(--hero-bg, linear-gradient(160deg, #C4A882, #7A6040))
        center / cover no-repeat;
}

.single-coll-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(26,26,24,0.88) 0%,
        rgba(26,26,24,0.40) 50%,
        rgba(26,26,24,0.10) 100%
    );
}

.single-coll-hero__content {
    position: relative;
    z-index: 2;
    padding-bottom: 3rem;
}

.single-coll-hero__cat {
    display: inline-block;
    background-color: var(--terracotta);
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    margin-bottom: 0.75rem;
}

.single-coll-hero__title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    font-weight: 700;
    color: #fff;
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

.single-coll-hero__period {
    font-family: var(--font-body);
    font-size: 0.88rem;
    color: rgba(255,255,255,0.7);
    font-weight: 300;
}

/* Metadata strip */
.coll-meta-strip {
    background-color: var(--bg-section);
    border-bottom: 1px solid var(--border-medium);
    padding: 1.25rem 0;
}

.coll-meta-strip__inner {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 0 2.5rem 0 0;
    border-right: 1px solid var(--border-light);
    margin-right: 2.5rem;
}
.meta-item:last-child { border-right: none; }

.meta-item__label {
    font-family: var(--font-body);
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.meta-item__value {
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Access level colour coding */
.meta-item__value--access.access--open          { color: var(--forest); }
.meta-item__value--access.access--restricted     { color: var(--terracotta); }
.meta-item__value--access.access--highly-restricted { color: #B91C1C; }

/* Two-column body layout */
.single-coll-body {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 4rem;
    padding-top: 3.5rem;
    padding-bottom: 5rem;
    align-items: start;
}

/* Curator note (pull-quote style) */
.coll-curator-note {
    display: flex;
    gap: 1rem;
    background-color: var(--bg-section);
    border-left: 3px solid var(--terracotta);
    border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
    padding: 1.25rem 1.5rem;
    margin: 2rem 0;
}

.coll-curator-note__icon { font-size: 1.5rem; flex-shrink: 0; }

.coll-curator-note__label {
    display: block;
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin-bottom: 0.4rem;
}

.coll-curator-note p {
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.75;
    margin: 0;
}

/* Collection gallery grid — masonry-style 3-col */
.coll-gallery {
    margin-top: 3rem;
}

.coll-gallery__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-top: 2rem;
}

.coll-gallery__thumb {
    display: block;
    width: 100%;
    aspect-ratio: 1;
    border: none;
    padding: 0;
    cursor: zoom-in;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    position: relative;
    background-color: var(--bg-section);
}

.coll-gallery__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
}
.coll-gallery__thumb:hover .coll-gallery__image { transform: scale(1.06); }

.coll-gallery__zoom {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(26,26,24,0.4);
    color: #fff;
    opacity: 0;
    transition: opacity var(--transition-fast);
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 600;
    gap: 0.4rem;
}
.coll-gallery__thumb:hover .coll-gallery__zoom { opacity: 1; }

/* Sidebar boxes */
.single-coll-sidebar { display: flex; flex-direction: column; gap: 1.5rem; }

.sidebar-box {
    background-color: #fff;
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius-xl);
    padding: 1.6rem;
}

.sidebar-box__title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

/* At a glance list */
.sidebar-detail-list { list-style: none; padding: 0; }

.sidebar-detail-list__item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border-light);
    font-family: var(--font-body);
    font-size: 0.82rem;
}
.sidebar-detail-list__item:last-child { border-bottom: none; }

.sidebar-detail-list__label { color: var(--text-muted); }
.sidebar-detail-list__value { font-weight: 600; color: var(--text-primary); }

.sidebar-box__cta { margin-top: 1.2rem; width: 100%; text-align: center; }

/* Related collections list */
.sidebar-related-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 0.6rem; }

.sidebar-related-list__link {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    text-decoration: none;
    padding: 0.6rem;
    border-radius: var(--border-radius-lg);
    transition: background-color var(--transition-fast);
}
.sidebar-related-list__link:hover { background-color: var(--bg-section); }

.sidebar-related-list__thumb {
    width: 52px;
    height: 52px;
    object-fit: cover;
    border-radius: var(--border-radius);
    flex-shrink: 0;
}

.sidebar-related-list__title {
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.sidebar-related-list__count {
    font-family: var(--font-body);
    font-size: 0.72rem;
    color: var(--text-muted);
}

.sidebar-related-list__arrow {
    margin-left: auto;
    flex-shrink: 0;
    color: var(--text-muted);
}

/* Visit box */
.sidebar-box--visit { background-color: var(--bg-section); text-align: center; }

.sidebar-box__visit-icon { font-size: 2rem; margin-bottom: 0.5rem; }

.sidebar-box__text {
    font-family: var(--font-body);
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

/* Related artefacts grid in single-collection */
.coll-artefacts-section { }

.artefact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
}


/* ════════════════════════════════════════════════════════
   G. ACF GALLERY LIGHTBOX (shared styles — also used in single-artefact)
════════════════════════════════════════════════════════ */

/* Lightbox modal */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.lightbox[hidden] { display: none; }

.lightbox__backdrop {
    position: absolute;
    inset: 0;
    background-color: rgba(26,26,24,0.92);
    backdrop-filter: blur(8px);
    cursor: pointer;
}

/* Navigation buttons */
.lightbox__close,
.lightbox__prev,
.lightbox__next {
    position: absolute;
    z-index: 9001;
    background-color: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.8);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
    background-color: rgba(255,255,255,0.22);
    color: #fff;
}

.lightbox__close { top: 1.5rem; right: 1.5rem; }
.lightbox__prev  { left: 1.5rem; top: 50%; transform: translateY(-50%); }
.lightbox__next  { right: 1.5rem; top: 50%; transform: translateY(-50%); }

/* Figure — constrained to viewport */
.lightbox__figure {
    position: relative;
    z-index: 9001;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: min(90vw, 1200px);
    max-height: 90vh;
}

.lightbox__image {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    display: block;
}

.lightbox__caption {
    margin-top: 0.75rem;
    font-family: var(--font-body);
    font-size: 0.78rem;
    color: rgba(255,255,255,0.6);
    text-align: center;
    max-width: 560px;
}

.lightbox__counter {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-body);
    font-size: 0.72rem;
    color: rgba(255,255,255,0.4);
    z-index: 9001;
}

/* Fade animation */
.lightbox.is-entering .lightbox__figure {
    animation: lightboxFadeIn 0.22s ease both;
}

@keyframes lightboxFadeIn {
    from { opacity: 0; transform: scale(0.96); }
    to   { opacity: 1; transform: scale(1); }
}


/* ════════════════════════════════════════════════════════
   H. ARTEFACT CARD
════════════════════════════════════════════════════════ */

.artefact-card {
    background-color: #fff;
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}
.artefact-card:hover {
    border-color: var(--terracotta);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.artefact-card__link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.artefact-card__image-wrap {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background-color: var(--bg-section);
}

.artefact-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
}
.artefact-card:hover .artefact-card__image { transform: scale(1.06); }

.artefact-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, #E8D4C0, #C4A882);
    font-size: 2.5rem;
    opacity: 0.5;
}

/* Conservation status badge — top right */
.artefact-card__status {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    font-family: var(--font-body);
    font-size: 0.55rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.2rem 0.5rem;
    border-radius: 20px;
    z-index: 2;
}

.status--good         { background-color: rgba(34,197,94,0.15); color: #15803D; }
.status--fair         { background-color: rgba(234,179,8,0.15);  color: #A16207; }
.status--poor         { background-color: rgba(239,68,68,0.12);  color: #B91C1C; }
.status--conservation { background-color: rgba(160,82,45,0.10);  color: var(--terracotta); }

/* Magnify hover overlay */
.artefact-card__hover {
    position: absolute;
    inset: 0;
    background-color: rgba(26,26,24,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.9);
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.artefact-card:hover .artefact-card__hover { opacity: 1; }

/* Card body */
.artefact-card__body { padding: 1rem; }

.artefact-card__meta {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-body);
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin-bottom: 0.35rem;
    flex-wrap: wrap;
}

.artefact-card__title {
    font-family: var(--font-heading);
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 0.3rem;
}

.artefact-card__accession {
    font-family: var(--font-body);
    font-size: 0.68rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.04em;
}


/* ════════════════════════════════════════════════════════
   I. SINGLE ARTEFACT — CATALOGUE LAYOUT
════════════════════════════════════════════════════════ */

.single-artefact-wrap { padding-bottom: 5rem; }

.artefact-breadcrumb { padding-top: 2rem; padding-bottom: 1rem; }

/* Two-column catalogue: images left, details right */
.artefact-catalogue {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
    padding-top: 2.5rem;
}

/* Left: image panel — sticky */
.artefact-images {
    position: sticky;
    top: calc(var(--header-height) + var(--quick-bar-height) + 1.5rem);
}

.artefact-main-image {
    background-color: var(--bg-section);
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    aspect-ratio: 1;
    position: relative;
}

.artefact-main-image__btn {
    display: block;
    width: 100%;
    height: 100%;
    border: none;
    padding: 0;
    cursor: zoom-in;
    background: none;
    position: relative;
}

.artefact-main-image__img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    padding: 1rem;
    box-sizing: border-box;
    transition: transform var(--transition-slow);
}
.artefact-main-image__btn:hover .artefact-main-image__img { transform: scale(1.03); }

.artefact-main-image__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    opacity: 0.25;
    background: linear-gradient(160deg, #E8D4C0, #C4A882);
}

.artefact-main-image__zoom {
    position: absolute;
    bottom: 0.85rem;
    right: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    background-color: rgba(26,26,24,0.65);
    color: rgba(255,255,255,0.85);
    font-family: var(--font-body);
    font-size: 0.68rem;
    font-weight: 600;
    padding: 0.3rem 0.65rem;
    border-radius: 20px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.artefact-main-image__btn:hover .artefact-main-image__zoom { opacity: 1; }

/* Thumbnail strip */
.artefact-thumbstrip {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.artefact-thumbstrip__btn {
    width: 64px;
    height: 64px;
    border: 2px solid var(--border-medium);
    border-radius: var(--border-radius);
    overflow: hidden;
    padding: 0;
    cursor: pointer;
    background: none;
    transition: border-color var(--transition-fast);
    flex-shrink: 0;
}
.artefact-thumbstrip__btn:hover { border-color: var(--terracotta); }
.artefact-thumbstrip__btn.is-active { border-color: var(--terracotta); }

.artefact-thumbstrip__btn img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.artefact-accession-label {
    font-family: var(--font-body);
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    text-align: center;
    letter-spacing: 0.04em;
}

/* Right: detail panel */
.artefact-detail { padding-top: 0.5rem; }

/* Access badge */
.artefact-access-badge {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    margin-bottom: 0.75rem;
}
.artefact-access--open          { background: rgba(44,74,62,0.1);   color: var(--forest); }
.artefact-access--restricted    { background: rgba(160,82,45,0.1);  color: var(--terracotta); }
.artefact-access--highly-restricted { background: rgba(185,28,28,0.1); color: #B91C1C; }

.artefact-detail__type {
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin-bottom: 0.5rem;
}

.artefact-detail__title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

/* Specs table — definition list */
.artefact-specs { margin-bottom: 2rem; }

.artefact-specs__row {
    display: flex;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--border-light);
    align-items: baseline;
    gap: 1rem;
}
.artefact-specs__row:last-child { border-bottom: none; }

.artefact-specs__label {
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    flex-shrink: 0;
    width: 110px;
}

.artefact-specs__value {
    font-family: var(--font-body);
    font-size: 0.88rem;
    color: var(--text-primary);
    font-weight: 500;
}

.artefact-specs__link {
    color: var(--terracotta);
    text-decoration: none;
    font-weight: 600;
}
.artefact-specs__link:hover { color: var(--terracotta-light); }

/* Conservation status pill in specs */
.artefact-status-pill {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.25rem 0.65rem;
    border-radius: 20px;
}

/* Provenance collapsible */
.artefact-provenance {
    border: 1.5px solid var(--border-medium);
    border-radius: var(--border-radius-lg);
    margin: 1.5rem 0;
    overflow: hidden;
}

.artefact-provenance__trigger {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.2rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    list-style: none;
    background-color: var(--bg-warm);
    transition: background-color var(--transition-fast);
}
.artefact-provenance__trigger:hover { background-color: var(--bg-section); }
.artefact-provenance__trigger::-webkit-details-marker { display: none; }

.artefact-provenance__chevron {
    transition: transform var(--transition-base);
    flex-shrink: 0;
}
.artefact-provenance[open] .artefact-provenance__chevron {
    transform: rotate(180deg);
}

.artefact-provenance__body {
    padding: 1.2rem;
    border-top: 1px solid var(--border-light);
    background-color: #fff;
}

/* Action buttons */
.artefact-detail__actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.artefact-detail__desc { margin-bottom: 1.5rem; }

/* Related artefacts section */
.artefact-related-section {}


/* ════════════════════════════════════════════════════════
   K. RESPONSIVE
════════════════════════════════════════════════════════ */

@media (max-width: 1200px) {
    .archive-layout { grid-template-columns: 240px 1fr; gap: 2rem; }
    .artefact-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
    /* Archive: collapse sidebar above grid */
    .archive-layout {
        grid-template-columns: 1fr;
    }
    .filter-sidebar {
        position: static;
        margin-bottom: 2rem;
    }
    .filter-sidebar__toggle { display: flex; }
    .filter-sidebar__inner {
        display: none;
    }
    .filter-sidebar.is-open .filter-sidebar__inner { display: block; }

    /* Collection grid: 2-col */
    .collection-grid { grid-template-columns: repeat(2, 1fr); }

    /* Single collection: stack */
    .single-coll-body {
        grid-template-columns: 1fr;
    }
    .single-coll-sidebar { order: -1; }
    .coll-gallery__grid { grid-template-columns: repeat(2, 1fr); }

    /* Single artefact: stack */
    .artefact-catalogue { grid-template-columns: 1fr; }
    .artefact-images { position: static; }
    .artefact-grid { grid-template-columns: repeat(2, 1fr); }

    /* Meta strip: wrap */
    .meta-item { border-right: none; margin-right: 0; padding-right: 0; }
    .coll-meta-strip__inner { gap: 1rem; }
}

@media (max-width: 768px) {
    .collection-grid { grid-template-columns: 1fr; }
    .artefact-grid { grid-template-columns: repeat(2, 1fr); }
    .single-coll-hero { min-height: 260px; }
    .artefact-catalogue { gap: 2rem; }
    .lightbox__prev { left: 0.5rem; }
    .lightbox__next { right: 0.5rem; }
}

@media (max-width: 480px) {
    .artefact-grid { grid-template-columns: 1fr; }
    .coll-gallery__grid { grid-template-columns: repeat(2, 1fr); }
    .artefact-detail__actions { flex-direction: column; }
}


/* ── EDITORIAL HERO ── */
.cl-hero {
    position: relative;
    padding: clamp(35px, 4vw, 60px) 6vw clamp(25px, 3vw, 35px);
    background: var(--bg-section);
    display: grid; grid-template-columns: 1fr 60px; gap: 40px; overflow: hidden;
}
.cl-hero::before {
    content: ""; position: absolute; inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(26,26,24,0.04) 1px, transparent 0);
    background-size: 18px 18px; opacity: 0.5; pointer-events: none;
}
.cl-hero__inner { position: relative; max-width: 1180px; margin: 0 auto; width: 100%; }
.cl-hero__eyebrow { display: flex; align-items: center; margin-bottom: 20px; }
.cl-rule { display: inline-block; width: 36px; height: 1px; background: var(--terracotta); margin-right: 14px; flex-shrink: 0; }
.cl-eyebrow-text { font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--text-muted); font-weight: 500; }
.cl-hero__title { font-family: var(--font-heading); font-size: clamp(2rem, 3.5vw, 2.8rem); font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; color: var(--text-primary); margin: 0 0 18px; }
.cl-hero__title em { font-style: italic; color: var(--terracotta); }
.cl-hero__lede { font-size: clamp(0.95rem, 1.2vw, 1.1rem); color: var(--text-secondary); max-width: 60ch; line-height: 1.65; }
.cl-hero__sidebar { display: flex; flex-direction: column; justify-content: space-between; align-items: center; padding: 10px 0; }
.cl-hero__folio { font-family: var(--font-heading); font-style: italic; font-size: 13px; color: var(--text-muted); letter-spacing: 0.06em; }
.cl-hero__vertical { writing-mode: vertical-rl; transform: rotate(180deg); font-size: 10px; letter-spacing: 0.4em; text-transform: uppercase; color: var(--text-muted); }
@media (max-width: 1024px) { .cl-hero { grid-template-columns: 1fr; } .cl-hero__sidebar { display: none; } }


/* ── COMPACT ACTION BUTTONS ── */
.artefact-detail__actions .btn-secondary { font-size: 0.7rem; padding: 0.45rem 1rem; }