/* ==========================================================================
   Component: Catalog Filters
   Sidebar filter panel + Catalog page layout
   ========================================================================== */

/* --- Catalog Page Layout --- */
.catalog {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--section-gap);
}

/* --- Top: Title + Sort + Filter Button --- */
.catalog__top {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto;
    column-gap: 12px;
    row-gap: var(--spacing-xl);
    align-items: end;
    margin-bottom: var(--spacing-xl);
}

.catalog__title {
    font-family: var(--font-family-serif);
    font-size: 44px;
    font-weight: 500;
    line-height: 48px;
    color: var(--color-text);
    grid-column: 1;
    grid-row: 1;
}

.catalog__sort-wrap {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

.catalog__sort-label {
    font-family: var(--font-family);
    font-size: 12px;
    font-weight: 500;
    line-height: 14px;
    color: var(--color-text);
    white-space: nowrap;
}

/* Filter button: hidden on desktop (sidebar visible) */
.catalog__filter-btn {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 15px 18px;
    background: var(--color-accent-50);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-btn);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 18px;
    color: var(--color-text);
    cursor: pointer;
    min-width: 100px;
    transition: opacity 0.2s;
}

.catalog__filter-btn:hover {
    opacity: 0.85;
}

.catalog__filter-btn svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* --- Body: Sidebar + Content --- */
.catalog__body {
    display: flex !important;
    gap: var(--spacing-xl);
}

.catalog__sidebar {
    flex: 0 0 280px !important;
    width: 280px !important;
    max-width: 280px !important;
    min-width: 280px;
}

.catalog__content {
    flex: 1 !important;
    min-width: 0;
    overflow: hidden;
    transition: opacity 0.2s ease;
}

/* --- Product Grid --- */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg) var(--spacing-md);
}

.catalog-grid .book-card {
    min-width: 0;
}

.catalog__empty {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.catalog__empty p {
    font-size: var(--font-size-lg);
    color: var(--color-dark-400);
    margin-bottom: var(--spacing-xl);
}

/* --- Filter Container --- */
.catalog-filters {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background: var(--color-accent-100);
    border-radius: 16px;
    padding: var(--spacing-lg);
    position: relative;
}

/* Close button — mobile only */
.catalog-filters__close {
    display: none;
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-dark-400);
    padding: 4px;
}

/* --- Filter Group --- */
.catalog-filters__group {
    /* No borders — spacing handled by parent gap */
}

.catalog-filters__group-title {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 18px;
    color: var(--color-dark-600);
    margin-bottom: var(--spacing-md);
}

/* Tighter gap before dropdowns and range inputs */
.catalog-filters__group-title + .catalog-filters__select,
.catalog-filters__group-title + .catalog-filters__range {
    margin-top: -8px;
}

/* --- Checkbox Item --- */
.catalog-filters__item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    margin-bottom: 8px;
}

.catalog-filters__item:last-child {
    margin-bottom: 0;
}

/* Custom checkbox */
.catalog-filters__checkbox {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    min-width: 16px;
    border: 1px solid var(--color-dark-300);
    border-radius: 3px;
    background: var(--color-accent-50);
    cursor: pointer;
    position: relative;
    transition: background-color 0.15s, border-color 0.15s;
}

.catalog-filters__checkbox:checked {
    background: var(--color-accent-600);
}

.catalog-filters__checkbox:checked::after {
    content: '';
    position: absolute;
    top: 1px;
    left: 4px;
    width: 5px;
    height: 9px;
    border: solid var(--color-dark-600);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.catalog-filters__label {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 18px;
    color: var(--color-dark-500);
    cursor: pointer;
}

/* --- Select Dropdown --- */
.catalog-filters__select {
    appearance: none;
    -webkit-appearance: none;
    width: 100%;
    height: 42px;
    padding: 0 36px 0 16px;
    background: var(--color-accent-50) url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23868788' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 14px center;
    border: 1px solid var(--color-accent-200);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--color-dark-500);
    cursor: pointer;
    outline: none;
}

.catalog-filters__select:focus {
    border-color: var(--color-accent-600);
}

/* --- Price Range --- */
.catalog-filters__range {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
}

.catalog-filters__range-input {
    flex: 1 1 0;
    width: 0;
    min-width: 0;
    height: 42px;
    padding: 0 8px 0 12px;
    background: var(--color-accent-50);
    border: 1px solid var(--color-dark-300);
    border-radius: 6px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-dark-500);
    outline: none;
    -moz-appearance: textfield;
}

.catalog-filters__range-input::-webkit-outer-spin-button,
.catalog-filters__range-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.catalog-filters__range-input:focus {
    border-color: var(--color-accent-600);
}

.catalog-filters__range-sep {
    font-size: var(--font-size-base);
    color: var(--color-dark-400);
    flex-shrink: 0;
    line-height: 1;
}

/* --- Found Count --- */
.catalog-filters__count {
    background: var(--color-accent-200);
    border-radius: 6px;
    padding: 12px 20px;
    text-align: center;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 20px;
    color: var(--color-dark-600);
}

/* --- Clear Filters --- */
.catalog-filters__clear {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: transparent;
    border: none;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-dark-600);
    cursor: pointer;
    padding: var(--spacing-xs);
    text-decoration: none;
}

.catalog-filters__clear:hover {
    opacity: 0.8;
}

.catalog-filters__clear svg {
    flex-shrink: 0;
}

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

/* --- Tablet: ≤1024px — 3-column grid --- */
@media (max-width: 1024px) {
    .catalog-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --- Tablet: ≤768px — hide sidebar, show filter button --- */
@media (max-width: 768px) {
    .catalog__top {
        display: flex;
        flex-wrap: wrap;
        gap: var(--spacing-lg);
    }

    .catalog__title {
        width: 100%;
        font-size: 36px;
        line-height: 40px;
    }

    .catalog__sort-wrap {
        flex: 1;
        min-width: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .catalog__sort-wrap .catalog-sort {
        width: 100%;
    }

    .catalog__sort-wrap .catalog-sort__trigger {
        height: 50px;
    }

    .catalog__filter-btn {
        display: flex;
        width: auto;
        flex-shrink: 0;
        align-self: flex-end;
    }

    .catalog__sidebar {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 200;
        background: var(--color-white);
        overflow-y: auto;
        padding: var(--spacing-lg);
    }

    .catalog__sidebar--open {
        display: block;
    }

    .catalog__sidebar--open .catalog-filters__close {
        display: block;
    }

    .catalog-filters {
        border-radius: 0;
        min-height: 100%;
    }
}

/* --- Small tablet: ≤600px — 2-column grid --- */
@media (max-width: 600px) {
    .catalog-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .catalog-grid .promo-card {
        grid-column: 1 / -1;
    }
}

/* 375px и ниже — остаётся 2 колонки (по Figma) */