/* ========================================
   HUB PAGES
   Shared across series + author hubs
======================================== */

.hub-hero {
    max-width: 760px;
}

.hub-search {
    margin-top: var(--s-7);
    max-width: 680px;
}

.hub-search .search-field {
    width: 100%;
}

/* ========================================
   HUB GRID
======================================== */

.hub-grid {
    display: grid;
    gap: var(--section-gap);
}

@media (min-width: 992px) {
    .hub-grid {
        grid-template-columns: minmax(0, 1fr) minmax(280px, 320px);
        align-items: start;
        gap: var(--s-11);
    }
}

.hub-main {
    min-width: 0;
}

.hub-sidebar {
    min-width: 0;
}

/* ========================================
   HUB SECTIONS
======================================== */

.hub-section {
    margin-bottom: var(--section-gap-lg);
}

.hub-section:last-child {
    margin-bottom: 0;
}

.hub-section-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--s-4);

    margin-bottom: var(--s-5);
}

.hub-section-header h2 {
    margin: 0;
}

.hub-section-link {
    color: var(--accent);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
}

.hub-section-link:hover {
    text-decoration: underline;
}

.hub-intro {
    max-width: 64ch;
    color: var(--muted);
    font-size: 0.94rem;
    line-height: 1.65;
    margin-bottom: var(--s-6);
}

/* ========================================
   FEATURED HUB LISTS
======================================== */

.hub-list {
    display: grid;
    gap: 0;
}

.hub-list .directory-row {
    border-top: 1px solid var(--black-05);
}

.hub-list .directory-row:first-child {
    border-top: none;
}

.hub-list-surface {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

/* ========================================
   COMPACT LINK GROUPS
======================================== */

.hub-link-groups {
    display: grid;
    gap: var(--s-8);
}

.hub-link-group {
    display: grid;
    gap: var(--s-3);
}

.hub-link-group-title {
    margin: 0;

    font-size: 0.82rem;
    line-height: 1.2;
    font-weight: 700;

    letter-spacing: 0.04em;
    text-transform: uppercase;

    color: var(--muted);
}

.hub-link-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-3);
}

.hub-link-list a {
    display: inline-flex;
    align-items: center;

    min-height: 34px;
    padding: 0 var(--s-4);

    border-radius: 999px;
    background: var(--chip-bg);

    color: var(--text);
    font-size: 0.84rem;
    font-weight: 600;
    text-decoration: none;

    transition:
        background-color 0.18s ease,
        color 0.18s ease;
}

.hub-link-list a:hover {
    background: var(--accent-08);
    color: var(--accent);
}

/* ========================================
   HUB FEATURE BLOCKS
======================================== */

.hub-feature-grid {
    display: grid;
    gap: var(--s-5);
}

@media (min-width: 768px) {
    .hub-feature-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.hub-feature-card {
    padding: var(--s-6);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
}

.hub-feature-card h3 {
    margin: 0 0 var(--s-3);

    font-size: 1rem;
    line-height: 1.3;
}

.hub-feature-card p {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.hub-feature-card a {
    color: var(--accent);
    text-decoration: none;
}

.hub-feature-card a:hover {
    text-decoration: underline;
}

/* ========================================
   HUB SIDEBAR
======================================== */

.hub-sidebar .section {
    margin-bottom: var(--section-gap);
}

.hub-sidebar .section:last-child {
    margin-bottom: 0;
}

/* ========================================
   MOBILE
======================================== */

@media (max-width: 640px) {

    .hub-section-header {
        display: block;
    }

    .hub-section-link {
        display: inline-block;
        margin-top: var(--s-2);
    }

    .hub-link-list {
        gap: var(--s-2);
    }

    .hub-link-list a {
        font-size: 0.8rem;
    }
}

/* ========================================
   HUB SEARCH
======================================== */

.hub-search {
    display: grid;
    gap: var(--s-4);
    margin-top: var(--s-6);
}

.hub-search .search-field {
    position: relative;
}

.hub-search .search-icon {
    position: absolute;
    top: 50%;
    left: 14px;

    width: 18px;
    height: 18px;

    transform: translateY(-50%);

    stroke: var(--muted);
    stroke-width: 2;
    fill: none;

    pointer-events: none;

    stroke-linecap: round;
    stroke-linejoin: round;
}

.hub-search .search-input {
    width: 100%;
    min-height: 50px;

    padding: 0 16px 0 44px;

    border: 1px solid var(--border);
    border-radius: 12px;

    background: var(--card);
    color: var(--text);

    box-shadow: none;

    transition:
        border-color 0.18s ease,
        background-color 0.18s ease,
        box-shadow 0.18s ease;
}

.hub-search .search-input::placeholder {
    color: var(--text-subtle);
}

.hub-search .search-input:hover {
    border-color: var(--accent-22);
    background: #fffdfa;
}

.hub-search .search-input:focus-visible {
    outline: none;
    border-color: var(--focus);
    box-shadow: 0 0 0 3px var(--focus-18);
}

.hub-search-btn {
    appearance: none;

    min-height: 50px;
    padding: 0 18px;

    border: 1px solid var(--accent);
    border-radius: 12px;

    background: var(--accent);
    color: var(--white);

    font: inherit;
    font-weight: 700;

    cursor: pointer;

    transition:
        background-color 0.18s ease,
        border-color 0.18s ease,
        transform 0.05s ease;
}

.hub-search-btn:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.hub-search-btn:active {
    transform: scale(0.995);
}

@media (min-width: 640px) {

    .hub-search {
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
    }

    .hub-search-btn {
        min-width: 132px;
    }
}

/* ========================================
   HUB FEATURED LISTS
======================================== */

.hub-list-surface {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.hub-list {
    display: grid;
    gap: 0;
}

.hub-list .book-item {
    border-top: 1px solid var(--black-05);
}

.hub-list .book-item:first-child {
    border-top: none;
}

/* Slightly tighter than normal directory pages */
.hub-list .directory-row {
    padding: 8px var(--tight-gap);
}

@media (min-width: 992px) {

    .hub-list .directory-row {
        padding: 9px var(--s-4);
    }
}

/* ========================================
   HUB A-Z OVERRIDES
======================================== */

.page-series-hub .directory-alpha-link:hover,
.page-author-hub .directory-alpha-link:hover {
    background: var(--accent-04);
    border-color: var(--accent-22);
    color: var(--accent);
}

.page-series-hub .directory-alpha-link.is-active,
.page-author-hub .directory-alpha-link.is-active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}

.hub-search .autosuggest-form {
    display: flex;
    align-items: stretch;
    gap: var(--s-4);
}

.hub-search .search-field {
    flex: 1 1 auto;
    min-width: 0;
}

.hub-search-btn {
    flex: 0 0 auto;
}