/* =========================================================
   encyclopedia-hub.css
   Encyclopedia Mongolia Hub Page Styles

   A landing/overview page for the encyclopedia with:
   - Page header (using reference-index.css styles)
   - Browse by type (card grid)
   - Browse by region (list)
   - Featured entries
   - CTA to browse all
   ========================================================= */

/* =========================================================
   1. IMPORT SHARED STYLES
   ========================================================= */

/* Header and container styles are aligned with the reference index design. */

/* =========================================================
   2. CONTENT LAYOUT
   ========================================================= */

.encyclopedia-hub-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    background-color: var(--bg-cream);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hub-hero {
    margin-bottom: 0;
    text-align: center;
    border-radius: 12px;
    padding: 4.5rem 3rem;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(120, 90, 70, 0.25);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
    background-image:
        url("https://itako999.com/linguistics/hero-left/"),
        url("https://itako999.com/linguistics/hero-right/"),
        linear-gradient(rgba(200, 106, 43, 0.45), rgba(200, 106, 43, 0.45)),
        linear-gradient(rgba(200, 106, 43, 0.45), rgba(200, 106, 43, 0.45)),
        radial-gradient(circle at center, rgba(200, 106, 43, 0.06), transparent 60%),
        linear-gradient(180deg, #fbf9f5 0%, #f6f1ea 100%);
    background-size:
        160px 80px,
        160px 80px,
        calc(100% - 48px) 1px,
        calc(100% - 48px) 1px,
        100% 100%,
        100% 100%;
    background-position:
        left 20px top 20px,
        right 20px top 20px,
        center 20px,
        center calc(100% - 20px),
        center,
        center;
    background-repeat: no-repeat;
}

.hub-hero::before,
.hub-hero::after {
    content: "";
    position: absolute;
    width: 120px;
    height: 120px;
    opacity: 0.9;
    pointer-events: none;
    bottom: 0;
    background-image: url("https://itako999.com/linguistics/hero-bottom/");
    background-size: contain;
    background-repeat: no-repeat;
}

.hub-hero::before {
    left: 20px;
    bottom: -35px;
}

.hub-hero::after {
    right: 20px;
    bottom: -35px;
    transform: scaleX(-1);
}

.hub-hero > *:not(.hero-bg) {
    position: relative;
    z-index: 1;
}

.hub-hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.hub-subtitle {
    text-transform: uppercase;
    font-weight: 600;
}

.hub-title {
    font-family: var(--font-serif);
    font-size: 2.1rem;
    margin: 0;
    letter-spacing: 0.06em;
    color: var(--ink-dark);
}

.hub-title::after {
    content: "";
    display: block;
    width: 52px;
    height: 6px;
    margin: 1.2rem auto 1rem;
    background:
        linear-gradient(to right, transparent, var(--accent-river), transparent);
    opacity: 0.7;
}

.hub-intro {
    margin: 0;
    color: var(--ink-light);
    font-size: 1rem;
    line-height: 1.7;
}

.hub-stats-row {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 0.5rem;
}

.hub-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
}

.hub-stat-divider {
    width: 1px;
    height: 32px;
    background: var(--border-color);
}

.stat-num {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--ink-dark);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--ink-light);
    letter-spacing: 0.1em;
}

/* =========================================================
   3. SECTION LAYOUT & STYLING
   ========================================================= */

.hub-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--rule);
}

.hub-section:last-of-type {
    border-bottom: none;
}

.hub-section-title,
.section-title {
    font-family: var(--serif);
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 0 1.2rem;
    color: var(--wood-dark);
    padding-bottom: 0.7rem;
    border-bottom: 3px solid var(--accent-river);
}

.section-intro {
    color: var(--ink-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: -0.5rem 0 1.5rem;
}

/* =========================================================
   3A. REFERENCE INDEX SECTION
   ========================================================= */

.section-reference-indexes {
    /* Removed padding and background to align with other sections */
}

.reference-index-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.reference-index-card {
    background: #fff;
    border: 2px solid var(--rule);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08);
}

.reference-index-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(201, 100, 45, 0.2);
    border-color: var(--accent-river);
}

.ref-card-link {
    display: block;
    padding: 1.25rem;
    text-decoration: none;
    color: inherit;
}

.ref-card-content {
    position: relative;
}

.ref-card-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    gap: 1rem;
}

.ref-card-title {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0;
    color: var(--ink-dark);
    transition: color 0.3s ease;
    flex: 1;
}

.reference-index-card:hover .ref-card-title {
    color: var(--accent-river);
}

.ref-card-excerpt {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 0;
}

.ref-card-arrow {
    font-size: 1.5rem;
    color: var(--ink-light);
    transition: all 0.3s ease;
    flex-shrink: 0;
    line-height: 1;
}

.reference-index-card:hover .ref-card-arrow {
    color: var(--accent-river);
    transform: translateX(5px);
}

.ref-table-preview {
    overflow: hidden;
    border-radius: 6px;
    border: 1px solid var(--rule);
    background: var(--bg-tan);
}

.ref-table-preview table {
    width: 100%;
    font-size: 0.8rem;
    border-collapse: collapse;
    margin: 0;
}

.ref-table-preview th,
.ref-table-preview td {
    padding: 0.4rem 0.6rem;
    text-align: left;
    border-bottom: 1px solid var(--rule);
    line-height: 1.4;
}

.ref-table-preview th {
    background: var(--accent-soft);
    font-weight: 600;
    color: var(--wood-dark);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ref-table-preview td {
    background: #fff;
    color: var(--ink-soft);
}

.ref-table-preview tr:last-child td {
    border-bottom: none;
}

.no-references {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--ink-light);
    font-style: italic;
}

/* =========================================================
   4. TYPE GRID (Browse by Type)
   ========================================================= */

.hub-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.2rem;
}

.hub-type-card,
.type-card {
    background: #fff;
    border: 1px solid var(--rule);
    border-radius: 8px;
    padding: 1.5rem 1.25rem;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.hub-type-card:hover,
.type-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(201, 100, 45, 0.15);
    border-color: var(--accent-river);
}

.type-card-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.type-icon {
    width: 2.4rem;
    height: 2.4rem;
    stroke-width: 1.8;
    transition: transform 0.3s ease;
}

.hub-type-card:hover .type-icon,
.type-card:hover .type-icon {
    transform: scale(1.1);
}

.type-card-title,
.type-name {
    font-family: var(--serif);
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0;
    color: var(--ink-soft);
}

.type-icon-circle {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 14px;
    background: var(--accent-soft);
    color: var(--wood-dark);

    flex-shrink: 0;
}

.type-icon-circle svg {
    width: 60%;
    height: 60%;

    display: block;
}

.type-card-header {
    display: flex;
    align-items: center;
    justify-content: center; /* ← horizontal centering */
    gap: 1rem;
    text-align: center;
    text-decoration: none;
}

.type-card-count,
.type-count {
    font-size: 0.85rem;
    color: var(--ink-light);
    margin: 0;
}

.type-card-subcats {
    list-style: none;
    margin: 0.6rem 0 0 0;
    padding: 0;
    border-top: 1px solid var(--rule);
    padding-top: 0.6rem;
    text-align: center;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.35rem 0.6rem;
}

.type-card-subcats li {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.2rem 0;
    font-size: 0.75rem;
    color: var(--ink-soft);
    gap: 0.4rem;
}

.subcat-name {
    flex: 0 1 auto;
}

.subcat-count {
    flex-shrink: 0;
    font-size: 0.7rem;
    color: var(--ink-light);
    background: var(--bg-tan);
    padding: 0.2rem 0.5rem;
    border-radius: 10px;
    font-weight: 600;
}

/* =========================================================
   5. REGION LIST (Browse by Region)
   ========================================================= */

.hub-region-list,
.region-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.region-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.region-group-title {
    font-family: var(--serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--wood-dark);
    margin: 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-river);
}

.region-group-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.hub-region-item,
.region-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: #fff;
    border: 1px solid var(--rule);
    border-radius: 6px;
    text-decoration: none;
    color: var(--ink);
    transition: all 0.2s ease;
}

.region-card-parent {
    background: var(--accent-soft);
    border-color: var(--accent-river);
    font-weight: 600;
}

.hub-region-item:hover,
.region-card:hover {
    background: var(--bg-tan);
    border-color: var(--accent-river);
    transform: translateX(5px);
}

.region-card-parent:hover {
    background: var(--accent-river);
}

.region-card-parent:hover .region-name,
.region-card-parent:hover .region-arrow {
    color: #fff;
}

.region-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
}

.hub-region-item:hover .region-name,
.region-card:hover .region-name {
    color: var(--accent-river);
}

.region-arrow {
    font-size: 1.2rem;
    color: var(--ink-light);
    transition: all 0.2s ease;
}

.region-card:hover .region-arrow {
    color: var(--accent-river);
    transform: translateX(3px);
}

.region-count {
    font-size: 0.85rem;
    color: var(--ink-light);
    background: var(--bg-tan);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-weight: 600;
}

.hub-region-item:hover .region-count,
.region-card:hover .region-count {
    background: #fff;
    color: var(--accent-river);
}

/* =========================================================
   6. FEATURED ENTRIES
   ========================================================= */

.hub-featured-grid,
.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.hub-featured-card,
.featured-item {
    background: #fff;
    border: 1px solid var(--rule);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.hub-featured-card:hover,
.featured-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
    border-color: var(--accent-river);
}

.featured-card-thumb,
.featured-img-wrap {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: var(--bg-tan);
    display: block;
    position: relative;
}

.featured-card-thumb img,
.featured-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.hub-featured-card:hover .featured-card-thumb img,
.featured-item:hover .featured-img-wrap img {
    transform: scale(1.05);
}

.featured-card-content,
.featured-body {
    padding: 1.5rem;
}

.featured-card-title,
.featured-title {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 0.8rem;
    line-height: 1.4;
}

.featured-card-title a,
.featured-title a {
    color: var(--ink);
    text-decoration: none;
    transition: color 0.2s ease;
}

.featured-card-title a:hover,
.featured-title a:hover {
    color: var(--accent-river);
}

.featured-card-meta,
.featured-meta {
    font-size: 0.85rem;
    color: var(--ink-light);
    margin-bottom: 0.8rem;
}

.featured-card-excerpt {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 0;
}

/* =========================================================
   7. CTA SECTION (Browse All)
   ========================================================= */

.hub-cta {
    text-align: center;
    padding: 3rem 1.5rem;
    margin-top: 2rem;
}

.hub-browse-all-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1.2rem 2.5rem;
    background: var(--accent-river);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(201, 100, 45, 0.3);
}

.hub-browse-all-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(201, 100, 45, 0.4);
}

.hub-browse-all-btn svg {
    width: 1.2em;
    height: 1.2em;
    transition: transform 0.3s ease;
}

.hub-browse-all-btn:hover svg {
    transform: translateX(5px);
}

/* =========================================================
   8. RESPONSIVE DESIGN
   ========================================================= */

@media (max-width: 768px) {
    .reference-content {
        margin-top: 2rem;
    }

    .hub-section {
        margin-bottom: 2rem;
        padding-bottom: 1.5rem;
    }

    .hub-section-title,
    .section-title {
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }

    .reference-index-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .ref-card-link {
        padding: 1rem;
    }

    .ref-card-title {
        font-size: 1.05rem;
    }

    .ref-table-preview {
        overflow-x: auto;
    }

    .ref-table-preview table {
        font-size: 0.75rem;
        min-width: 100%;
    }

    .ref-table-preview th,
    .ref-table-preview td {
        padding: 0.3rem 0.4rem;
        white-space: nowrap;
    }

    .hub-type-grid {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 1rem;
    }

    .hub-type-card,
    .type-card {
        padding: 1.25rem 1rem;
    }

    .type-card-title {
        font-size: 0.95rem;
    }

    .type-card-subcats {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }

    .hub-region-list,
    .region-grid {
        gap: 1.5rem;
    }

    .region-group {
        gap: 0.8rem;
    }

    .region-group-title {
        font-size: 1rem;
    }

    .region-group-cards {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    .hub-featured-grid,
    .featured-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hub-cta {
        padding: 2rem 1rem;
    }

    .hub-browse-all-btn {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .hub-title {
        font-size: 1.5rem;
    }

    .hub-stats-row {
        flex-direction: column;
        gap: 1.5rem;
    }

    .hub-type-grid {
        grid-template-columns: 1fr;
    }
}