/* ============================================
   Catalog Page Styles - Фильтры и Сетка курсов
   ============================================ */

/* ===== Breadcrumbs ===== */
.breadcrumbs {
    background-color: white;
    padding: var(--spacing-2) 0;
    border-bottom: 1px solid var(--color-border);
}

.breadcrumbs__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    list-style: none;
    flex-wrap: wrap;
}

.breadcrumbs__list a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.breadcrumbs__list a:hover {
    color: var(--color-primary);
}

.breadcrumbs__separator {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.breadcrumbs__current {
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

/* ===== Catalog Page Layout ===== */
.catalog-page {
    background-color: var(--color-bg-light);
    padding: var(--spacing-4) 0 var(--spacing-8);
    min-height: calc(100vh - 200px);
}

.catalog-page__header {
    margin-bottom: var(--spacing-3);
}

.catalog-page__title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-1);
    letter-spacing: -0.02em;
}

.catalog-page__count {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.catalog-page__count span {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

/* ===== Catalog Controls (Чипсы + Сортировка) ===== */
.catalog-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-3);
}

/* Строка 1: Чипсы фильтров */
.catalog-chips {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-2-5);
    background-color: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.chips-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    flex: 1;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.chip--filter.active {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chips-show-more {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: none;
    border: none;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    border-radius: var(--radius-md);
}

.chips-show-more:hover {
    background-color: var(--color-primary-light);
}

.chips-show-more svg {
    transition: transform var(--transition-fast);
}

.chips-show-more.expanded svg {
    transform: rotate(180deg);
}

/* Строка 2: Панель инструментов (Сортировка + Вид) */
.catalog-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-2) var(--spacing-2-5);
    background-color: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    gap: var(--spacing-3);
}

/* Сортировка */
.catalog-sort {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.catalog-sort__label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    white-space: nowrap;
}

/* Кастомный селект */
.custom-select {
    position: relative;
    display: inline-block;
    min-width: 200px;
}

.catalog-sort__select {
    width: 100%;
    padding: 8px 36px 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    background-color: white;
    cursor: pointer;
    appearance: none;
    transition: all var(--transition-fast);
}

.catalog-sort__select:hover {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.catalog-sort__select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 91, 255, 0.1);
}

.catalog-sort__select option {
    background: #fff;
    color: var(--color-text);
}

.custom-select__icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--color-primary);
}

/* Переключатель вида */
.catalog-view-toggle {
    display: flex;
    gap: 4px;
}

.view-toggle__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: white;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.view-toggle__btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.view-toggle__btn.active {
    border-color: var(--color-primary);
    background-color: var(--color-primary);
    color: white;
}

.view-toggle__btn svg {
    transition: all var(--transition-fast);
}

/* ===== Content Layout (Filters + Grid) ===== */
.catalog-page__content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-4);
    align-items: start;
}

/* ===== Filters Sidebar ===== */
.catalog-filters {
    background-color: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: var(--spacing-2-5);
}

.filters__close {
    display: none;
}

.filters__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-2);
    padding-bottom: var(--spacing-1-5);
    border-bottom: 1px solid var(--color-border);
}

.filters__title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.filters__reset {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    background: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
}

.filters__reset:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Active Filters Tags */
.active-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-1);
    margin-bottom: var(--spacing-3);
}

.active-filters:empty {
    display: none;
}

.active-filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background-color: var(--color-primary-light);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    color: var(--color-primary);
}

.active-filter-tag__remove {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: var(--radius-full);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    color: var(--color-primary);
    transition: all var(--transition-fast);
}

.active-filter-tag__remove:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Filter Block */
.filter-block {
    margin-bottom: var(--spacing-2);
    padding-bottom: var(--spacing-2);
    border-bottom: 1px solid var(--color-border);
}

.filter-block:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.filter-block__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0;
    cursor: pointer;
    user-select: none;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.filter-block__header:hover {
    background-color: var(--color-bg-light);
}

.filter-block__title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.filter-block__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    transition: transform var(--transition-fast);
    pointer-events: none;
}

.filter-block__toggle svg {
    transition: transform var(--transition-fast);
}

.filter-block.collapsed .filter-block__toggle svg {
    transform: rotate(180deg);
}

.filter-block__content {
    padding-top: var(--spacing-1-5);
    overflow: hidden;
}

.filter-block.collapsed .filter-block__content {
    display: none;
}

/* Price Range Filter */
.price-range {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1-5);
}

.price-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.price-input {
    flex: 1;
    position: relative;
}

.price-input label {
    display: block;
    font-size: 11px;
    color: var(--color-text-light);
    margin-bottom: 2px;
}

.price-input input {
    width: 100%;
    padding: 8px 24px 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    background-color: white;
    transition: border-color var(--transition-fast);
}

.price-input input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.price-currency {
    position: absolute;
    right: 8px;
    bottom: 8px;
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

.price-separator {
    color: var(--color-text-light);
    margin-top: 16px;
    font-size: var(--font-size-sm);
}

/* Price Slider */
.price-slider {
    position: relative;
    height: 20px;
    margin-top: var(--spacing-1);
}

.price-slider__track {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background-color: var(--color-border);
    border-radius: var(--radius-full);
    transform: translateY(-50%);
}

.price-slider__range {
    position: absolute;
    height: 100%;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
}

.price-slider__input {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    pointer-events: none;
}

.price-slider__input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background-color: white;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    pointer-events: auto;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.price-slider__input::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.price-slider__input::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background-color: white;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    pointer-events: auto;
    box-shadow: var(--shadow-sm);
}

/* Filter Search */
.filter-search {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 10px;
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-1-5);
    transition: all var(--transition-fast);
}

.filter-search:focus-within {
    border-color: var(--color-primary);
    background-color: white;
}

.filter-search svg {
    color: var(--color-text-light);
    flex-shrink: 0;
    width: 14px;
    height: 14px;
}

.filter-search__input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: var(--font-size-xs);
    color: var(--color-text-primary);
    padding: 0;
}

.filter-search__input::placeholder {
    color: var(--color-text-light);
}

.filter-search__input:focus {
    outline: none;
}

/* Filter Input Field */
.filter-input-wrapper {
    margin-top: var(--spacing-1);
}

.filter-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    background-color: white;
    transition: border-color var(--transition-fast);
}

.filter-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 91, 255, 0.1);
}

.filter-input::placeholder {
    color: var(--color-text-light);
}

/* Filter Checkboxes */
.filter-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
}

.filter-checkbox:hover {
    background-color: var(--color-bg-light);
}

.filter-checkbox input {
    display: none;
}

.filter-checkbox__mark {
    width: 16px;
    height: 16px;
    border: 1.5px solid var(--color-border);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.filter-checkbox__mark::after {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 2px;
    opacity: 0;
    transform: scale(0);
    transition: all var(--transition-fast);
}

.filter-checkbox input:checked + .filter-checkbox__mark {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.filter-checkbox input:checked + .filter-checkbox__mark::after {
    opacity: 1;
    transform: scale(1);
}

.filter-checkbox__label {
    flex: 1;
    font-size: var(--font-size-xs);
    color: var(--color-text-primary);
    line-height: 1.3;
}

.filter-checkbox__count {
    font-size: 11px;
    color: var(--color-text-light);
    background-color: var(--color-bg-light);
    padding: 1px 6px;
    border-radius: var(--radius-full);
}

/* Filter Tags */
.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.filter-tag {
    cursor: pointer;
}

.filter-tag input {
    display: none;
}

.filter-tag__label {
    display: inline-block;
    padding: 5px 10px;
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.filter-tag:hover .filter-tag__label {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-tag input:checked + .filter-tag__label {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* Show More Button */
.filter-show-more {
    display: inline-block;
    margin-top: 6px;
    padding: 0;
    background: none;
    border: none;
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-show-more:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Mobile Apply Button */
.filters__apply-mobile {
    display: none;
}

/* ===== Catalog Results ===== */
.catalog-results {
    min-width: 0;
}

/* Mobile Filters Toggle */
.filters-toggle-mobile {
    display: none;
}

/* Courses Grid for Catalog */
.catalog-results .courses__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-3);
}

.catalog-results .course-card {
    min-width: unset;
    max-width: unset;
}

/* List View */
.catalog-results .courses__grid--list {
    grid-template-columns: 1fr;
}

.catalog-results .courses__grid--list .course-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-3);
}

.catalog-results .courses__grid--list .course-card__image {
    height: 150px;
}

.catalog-results .courses__grid--list .course-card__content {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-1);
    margin-top: var(--spacing-6);
}

.pagination__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background-color: white;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination__btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.pagination__btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination__pages {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.pagination__page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 var(--spacing-2);
    border-radius: var(--radius-md);
    background-color: white;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.pagination__page.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.pagination__dots {
    padding: 0 var(--spacing-1);
    color: var(--color-text-light);
}

/* ===== Active Catalog Button State ===== */
.header__catalog-btn--active {
    background: var(--color-primary-dark);
}

/* ===== Mobile Responsive ===== */
@media (max-width: 1024px) {
    .catalog-page__content {
        grid-template-columns: 1fr;
    }

    /* Filters as overlay */
    .catalog-filters {
        position: fixed;
        top: 0;
        left: 0;
        width: 320px;
        height: 100vh;
        max-height: 100vh;
        z-index: var(--z-index-modal);
        border-radius: 0;
        border: none;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        padding-bottom: 100px;
    }

    .catalog-filters.active {
        transform: translateX(0);
    }

    .filters__close {
        display: flex;
        position: absolute;
        top: var(--spacing-2);
        right: var(--spacing-2);
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        background-color: var(--color-bg-light);
        border: none;
        border-radius: var(--radius-full);
        cursor: pointer;
        color: var(--color-text-primary);
        transition: all var(--transition-fast);
    }

    .filters__close:hover {
        background-color: var(--color-border);
    }

    .filters__header {
        padding-top: var(--spacing-6);
    }

    .filters__apply-mobile {
        display: block;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 320px;
        padding: var(--spacing-3);
        background: white;
        border-top: 1px solid var(--color-border);
        box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
    }

    .filters__apply-mobile .btn {
        width: 100%;
    }

    /* Overlay */
    .catalog-filters::before {
        content: '';
        position: fixed;
        top: 0;
        left: 320px;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .catalog-filters.active::before {
        opacity: 1;
        visibility: visible;
    }

    /* Mobile Filters Toggle Button */
    .filters-toggle-mobile {
        display: flex;
        align-items: center;
        gap: var(--spacing-1);
        padding: 12px 20px;
        background-color: white;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        font-size: var(--font-size-base);
        font-weight: var(--font-weight-medium);
        color: var(--color-text-primary);
        cursor: pointer;
        margin-bottom: var(--spacing-3);
        transition: all var(--transition-fast);
    }

    .filters-toggle-mobile:hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
    }

    .filters-toggle-mobile svg {
        color: var(--color-primary);
    }

    .filters-count {
        display: flex;
        align-items: center;
        justify-content: center;
        min-width: 24px;
        height: 24px;
        padding: 0 8px;
        background-color: var(--color-primary);
        color: white;
        border-radius: var(--radius-full);
        font-size: var(--font-size-xs);
        font-weight: var(--font-weight-bold);
    }

    .filters-count:empty,
    .filters-count[data-count="0"] {
        display: none;
    }

    /* Body scroll lock */
    body.filters-open {
        overflow: hidden;
    }
}

@media (max-width: 768px) {
    .catalog-page__title {
        font-size: var(--font-size-2xl);
    }

    .catalog-chips {
        padding: var(--spacing-2);
    }

    .chips-list {
        gap: 6px;
    }

    .chip {
        padding: 6px 12px;
        font-size: var(--font-size-xs);
    }

    .chips-show-more {
        padding: 6px 12px;
        font-size: var(--font-size-xs);
    }

    .catalog-toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-2);
    }

    .catalog-sort {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-1);
    }

    .custom-select {
        min-width: 100%;
    }

    .catalog-view-toggle {
        align-self: flex-end;
    }

    .catalog-results .courses__grid {
        grid-template-columns: 1fr;
    }

    .pagination__page {
        min-width: 40px;
        height: 40px;
    }

    .pagination__btn {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .catalog-filters {
        width: 100%;
    }

    .filters__apply-mobile {
        width: 100%;
    }

    .catalog-filters::before {
        display: none;
    }
}

/* ===== Search Empty State ===== */
.search-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 20px;
}

.search-empty__icon {
    color: var(--color-text-light);
    opacity: 0.4;
    margin-bottom: 24px;
}

.search-empty__title {
    font-family: var(--font-family-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.search-empty__text {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 420px;
}

.catalog-page__pagination {
    margin-top: 48px;
    display: flex;
    justify-content: center;
}

.catalog-page__pagination .nav-links {
    display: flex;
    gap: 4px;
}

.catalog-page__pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 200ms;
}

.catalog-page__pagination .page-numbers:hover {
    background: #F3F4F6;
    color: var(--color-text-primary);
}

.catalog-page__pagination .page-numbers.current {
    background: var(--color-primary);
    color: #fff;
}