/*
 * Categories Directory Page
 *
 * Styles for the hierarchical category browser
 * with search and filter functionality.
 *
 * @package AffiliateCMS
 * @since 4.0.0
 */

/* ========================================
 * HERO MINIMAL
 * ======================================== */

.hero-minimal {
    padding: var(--space-10) 0 var(--space-8);
    text-align: center;
    background: linear-gradient(
        to bottom,
        var(--color-bg-alt) 0%,
        var(--color-bg) 100%
    );
    border-bottom: 1px solid var(--color-border-subtle);
}

.hero-minimal__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, rgba(244, 165, 138, 0.1) 100%);
    border-radius: var(--radius-xl);
    color: var(--color-primary);
    font-size: 28px;
}

.hero-minimal__title {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--color-text);
    margin: 0 0 var(--space-3);
}

.hero-minimal .breadcrumb {
    justify-content: center;
    margin-bottom: var(--space-3);
}

.hero-minimal__subtitle {
    font-size: var(--text-base);
    color: var(--color-text-muted);
    margin: 0;
    max-width: 500px;
    margin-inline: auto;
}

/* ========================================
 * CATEGORIES DIRECTORY SECTION
 * ======================================== */

.categories-directory {
    padding-top: var(--space-8);
}

/* ========================================
 * CONTROLS (Search & Filters)
 * ======================================== */

.cat-dir__controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
}

@media (min-width: 768px) {
    .cat-dir__controls {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

/* Search */
.cat-dir__search {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.cat-dir__search > i {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 16px;
    pointer-events: none;
}

.cat-dir__search-input {
    width: 100%;
    padding: var(--space-3) var(--space-10) var(--space-3) var(--space-10);
    font-size: var(--text-sm);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--duration-200) var(--ease-out);
}

.cat-dir__search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.cat-dir__search-input::placeholder {
    color: var(--color-text-subtle);
}

.cat-dir__search-clear {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    display: none;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    padding: 0;
    background: var(--color-bg-alt);
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--duration-150) var(--ease-out);
}

.cat-dir__search-clear:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.cat-dir__search-input:not(:placeholder-shown) + .cat-dir__search-clear {
    display: flex;
}

/* Filters */
.cat-dir__filters {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.cat-dir__filter-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    background-color: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--duration-150) var(--ease-out);
}

.cat-dir__filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.cat-dir__filter-btn.is-active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.cat-dir__filter-btn i {
    font-size: 14px;
}

/* Filter Dropdown */
.cat-dir__filter-dropdown {
    position: relative;
}

.cat-dir__filter-menu {
    position: absolute;
    top: 100%;
    right: 0;
    z-index: 100;
    display: none;
    min-width: 200px;
    margin-top: var(--space-2);
    padding: var(--space-2);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.cat-dir__filter-dropdown.is-open .cat-dir__filter-menu {
    display: block;
}

.cat-dir__filter-option {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-150) var(--ease-out);
    text-align: left;
}

.cat-dir__filter-option:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-text);
}

.cat-dir__filter-option.is-active {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.cat-dir__filter-option i {
    font-size: 14px;
    color: var(--color-text-muted);
}

.cat-dir__filter-option.is-active i {
    color: var(--color-primary);
}

/* Results Count */
.cat-dir__results {
    margin-bottom: var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ========================================
 * CATEGORY TREE VIEW
 * ======================================== */

.cat-dir__tree {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

/* Parent Group */
.cat-tree__group {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--duration-200) var(--ease-out);
}

.cat-tree__group:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.cat-tree__group.is-hidden {
    display: none;
}

/* Parent Category */
.cat-tree__parent {
    position: relative;
}

.cat-tree__parent-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    text-decoration: none;
    color: var(--color-text);
    background-color: var(--color-bg-alt);
    transition: all var(--duration-150) var(--ease-out);
}

.cat-tree__parent-link:hover {
    background-color: var(--color-primary-light);
}

.cat-tree__parent-link:hover .cat-tree__name {
    color: var(--color-primary);
}

.cat-tree__icon--parent {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, rgba(244, 165, 138, 0.15) 100%);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    font-size: 18px;
}

.cat-tree__parent-link .cat-tree__name {
    flex: 1;
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    transition: color var(--duration-150) var(--ease-out);
}

.cat-tree__parent-link .cat-tree__count {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    font-weight: var(--font-normal);
}

.cat-tree__arrow {
    color: var(--color-text-subtle);
    font-size: 14px;
    transition: transform var(--duration-200) var(--ease-out);
}

.cat-tree__parent-link:hover .cat-tree__arrow {
    transform: translateX(4px);
    color: var(--color-primary);
}

/* Children Container - Tree list style */
.cat-tree__children {
    display: flex;
    flex-direction: column;
    padding: var(--space-3) var(--space-4) var(--space-4);
    background-color: var(--color-surface);
}

/* Child Category */
.cat-tree__child {
    position: relative;
    padding-left: var(--space-4);
}

.cat-tree__child::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border-subtle);
}

.cat-tree__child::after {
    content: '';
    position: absolute;
    left: 0;
    top: 18px;
    width: 12px;
    height: 2px;
    background-color: var(--color-border-subtle);
}

.cat-tree__child:last-child::before {
    height: 18px;
}

.cat-tree__child.is-hidden {
    display: none;
}

.cat-tree__child-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    margin-left: var(--space-2);
    text-decoration: none;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--duration-150) var(--ease-out);
}

.cat-tree__child-link:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-primary);
}

.cat-tree__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: 12px;
    flex-shrink: 0;
}

.cat-tree__child-link:hover .cat-tree__icon {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.cat-tree__child-link .cat-tree__name {
    flex: 1;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
}

.cat-tree__child-link .cat-tree__count {
    font-size: var(--text-xs);
    color: var(--color-text-subtle);
}

/* Grandchildren (Level 3) */
.cat-tree__grandchildren {
    padding-left: var(--space-6);
    margin-top: var(--space-1);
}

.cat-tree__grandchild {
    position: relative;
    padding-left: var(--space-4);
}

.cat-tree__grandchild::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border-subtle);
}

.cat-tree__grandchild::after {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 10px;
    height: 2px;
    background-color: var(--color-border-subtle);
}

.cat-tree__grandchild:last-child::before {
    height: 14px;
}

.cat-tree__grandchild.is-hidden {
    display: none;
}

.cat-tree__grandchild-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1-5) var(--space-2);
    margin-left: var(--space-2);
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    transition: all var(--duration-150) var(--ease-out);
}

.cat-tree__grandchild-link:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-alt);
}

.cat-tree__icon--small {
    width: 20px;
    height: 20px;
    font-size: 11px;
}

.cat-tree__grandchild-link .cat-tree__name {
    flex: 1;
}

.cat-tree__grandchild-link .cat-tree__count {
    font-size: var(--text-xs);
    color: var(--color-text-subtle);
}

/* Level 4 */
.cat-tree__level4 {
    padding-left: var(--space-6);
    margin-top: var(--space-1);
}

.cat-tree__level4-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-2);
    padding-left: var(--space-4);
    text-decoration: none;
    color: var(--color-text-subtle);
    font-size: var(--text-xs);
    border-radius: var(--radius-sm);
    transition: all var(--duration-150) var(--ease-out);
}

.cat-tree__level4-link::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-border);
    font-size: 10px;
}

.cat-tree__level4-link:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-alt);
}

.cat-tree__level4-link.is-hidden {
    display: none;
}

.cat-tree__icon--tiny {
    width: 16px;
    height: 16px;
    font-size: 9px;
}

/* ========================================
 * A-Z LIST VIEW
 * ======================================== */

.cat-dir__az-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.cat-az__group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.cat-az__group.is-hidden {
    display: none;
}

.cat-az__letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    background-color: var(--color-primary-light);
    border-radius: var(--radius-lg);
}

.cat-az__items {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
}

@media (min-width: 768px) {
    .cat-az__items {
        grid-template-columns: repeat(3, 1fr);
    }
}

.cat-az__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    text-decoration: none;
    color: var(--color-text-secondary);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--duration-150) var(--ease-out);
    min-width: 0;
    overflow: hidden;
}

.cat-az__item:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.cat-az__item.is-hidden {
    display: none;
}

.cat-az__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: 12px;
    flex-shrink: 0;
}

.cat-az__item:hover .cat-az__icon {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.cat-az__name {
    flex: 1;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cat-az__count {
    font-size: var(--text-xs);
    color: var(--color-text-subtle);
    flex-shrink: 0;
}

/* ========================================
 * NO RESULTS
 * ======================================== */

.cat-dir__no-results {
    text-align: center;
    padding: var(--space-12) var(--space-4);
}

.cat-dir__no-results-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-4);
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-full);
    color: var(--color-text-subtle);
    font-size: 28px;
}

.cat-dir__no-results h3 {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin: 0 0 var(--space-2);
}

.cat-dir__no-results p {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin: 0;
}

/* ========================================
 * SEARCH HIGHLIGHT
 * ======================================== */

.cat-tree__name mark,
.cat-az__name mark {
    background-color: var(--color-warning-light, rgba(251, 191, 36, 0.3));
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

/* ========================================
 * DARK THEME
 * ======================================== */

[data-theme="dark"] .hero-minimal {
    background: linear-gradient(
        to bottom,
        var(--color-surface) 0%,
        var(--color-bg) 100%
    );
}

[data-theme="dark"] .cat-dir__search-input {
    background-color: var(--color-surface);
}

[data-theme="dark"] .cat-tree__parent-link {
    background-color: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .cat-tree__parent-link:hover {
    background-color: rgba(20, 184, 166, 0.1);
}

/* ========================================
 * RESPONSIVE
 * ======================================== */

@media (max-width: 639px) {
    .hero-minimal {
        padding: var(--space-8) 0 var(--space-6);
    }

    .hero-minimal__icon {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }

    .hero-minimal__title {
        font-size: var(--text-2xl);
    }

    .cat-dir__controls {
        padding: var(--space-3);
    }

    .cat-dir__filters {
        flex-wrap: wrap;
    }

    .cat-dir__filter-btn {
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }

    .cat-tree__parent-link {
        padding: var(--space-3) var(--space-4);
    }

    .cat-tree__icon--parent {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }

    .cat-tree__parent-link .cat-tree__name {
        font-size: var(--text-base);
    }

    .cat-az__letter {
        width: 36px;
        height: 36px;
        font-size: var(--text-lg);
    }

    .cat-az__item {
        padding: var(--space-2);
    }

    .cat-az__name {
        font-size: var(--text-xs);
    }

    .cat-az__letters {
        gap: var(--space-1);
    }

    .cat-az__letter-btn {
        width: 28px;
        height: 28px;
        font-size: var(--text-xs);
    }
}

/* ========================================
 * LAZY LOADING — Expand Toggle & A-Z Nav
 * ======================================== */

/* Row layout — link + expand button on same line */
.cat-tree__child-row,
.cat-tree__grandchild-row {
    display: flex;
    align-items: center;
}

.cat-tree__child-row .cat-tree__child-link,
.cat-tree__grandchild-row .cat-tree__grandchild-link {
    flex: 1;
    min-width: 0;
}

/* Expand button (L2 → L3, L3 → L4) */
.cat-tree__expand {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    margin-left: var(--space-1);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-full);
    color: var(--color-text-muted);
    font-size: 11px;
    cursor: pointer;
    transition: all var(--duration-150) var(--ease-out);
    white-space: nowrap;
    flex-shrink: 0;
}

.cat-tree__expand:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.cat-tree__expand i {
    font-size: 10px;
    transition: transform var(--duration-200) var(--ease-out);
}

.cat-tree__expand.is-expanded i {
    transform: rotate(90deg);
}

.cat-tree__expand--small {
    padding: 2px 8px;
    font-size: 10px;
}

.cat-tree__expand-text {
    font-size: inherit;
    font-weight: var(--font-medium);
}

/* Loading spinner */
.cat-tree__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.acms-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border-subtle);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: acms-spin 0.6s linear infinite;
}

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

/* Empty state */
.cat-tree__empty {
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    font-style: italic;
}

/* A-Z Letter Navigation Bar */
.cat-az__letters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1-5);
    padding: var(--space-3) 0;
    margin-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border-subtle);
}

.cat-az__letter-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: all var(--duration-150) var(--ease-out);
}

.cat-az__letter-btn:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.cat-az__letter-btn.is-active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* A-Z content area */
.cat-az__content {
    min-height: 100px;
}

/* Search results container */
.cat-dir__search-results {
    min-height: 100px;
}

.cat-dir__search-results .cat-az__items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-2);
}