/* ===================================
   ZAMOK — Catalog Filters
   Умный фильтр: цена, характеристики, наличие, склад
   =================================== */

.catalog-filters {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    margin-top: var(--spacing-sm);
    overflow: hidden;
}

.catalog-filters__title {
    padding: 20px 24px 16px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.catalog-filters__clear {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    text-transform: none;
    letter-spacing: 0;
    transition: opacity var(--transition-fast);
    background: none;
    border: none;
    padding: 0;
}

.catalog-filters__clear:hover {
    opacity: 0.7;
}

.catalog-filters__clear--hidden {
    visibility: hidden;
}

.catalog-filters__empty {
    padding: 18px 24px 22px;
    font-size: var(--font-size-sm);
    line-height: 1.55;
    color: var(--color-text-muted);
}

/* Filter group */
.filter-group {
    border-bottom: 1px solid var(--color-border-light);
}

.filter-group:last-child {
    border-bottom: none;
}

.filter-group__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    cursor: pointer;
    transition: background var(--transition-fast);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
}

.filter-group__header:hover {
    background: var(--color-bg-secondary);
}

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

.filter-group__arrow {
    width: 16px;
    height: 16px;
    color: var(--color-text-muted);
    transition: transform var(--transition-base);
}

.filter-group--open .filter-group__arrow {
    transform: rotate(180deg);
}

.filter-group__body {
    padding: 0 24px 20px;
    display: none;
}

.filter-group--open .filter-group__body {
    display: block;
}

/* Price range */
.filter-price {
    padding-top: 4px;
}

.filter-price__inputs {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.filter-price__field {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
    padding: 6px 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.filter-price__field:focus-within {
    border-color: var(--color-primary);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(225, 30, 40, 0.08);
}

.filter-price__field-label {
    font-size: 11px;
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    color: var(--color-text-muted);
}

.filter-price__input {
    width: 100%;
    min-width: 0;
    padding: 0;
    border: none;
    background: transparent;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-align: left;
    outline: none;
}

.filter-price__input::-webkit-outer-spin-button,
.filter-price__input::-webkit-inner-spin-button {
    margin: 0;
    appearance: none;
}

.filter-price__sep {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.filter-price__slider {
    position: relative;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    margin: 8px 0;
}

.filter-price__slider-fill {
    position: absolute;
    height: 100%;
    background: var(--color-primary);
    border-radius: 2px;
}

.filter-price__slider-handle {
    position: absolute;
    top: 50%;
    width: 18px;
    height: 18px;
    background: var(--color-white);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    cursor: grab;
    transition: box-shadow var(--transition-fast);
    z-index: 2;
}

.filter-price__slider-handle:hover,
.filter-price__slider-handle:active {
    box-shadow: 0 0 0 4px rgba(225, 30, 40, 0.15);
}

.filter-price__slider-handle:active {
    cursor: grabbing;
}

/* Checkbox filter options */
.filter-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-top: 4px;
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.filter-option:hover {
    color: var(--color-text);
}

.filter-option__checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    appearance: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    flex-shrink: 0;
    background: var(--color-white);
}

.filter-option__checkbox:checked {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.filter-option__checkbox:checked::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 5px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.filter-option__label {
    flex: 1;
}

.filter-option__count {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Mobile filter button */
.catalog-filters-mobile {
    display: none;
}

@media (max-width: 1024px) {
    .catalog-filters {
        display: none;
    }

    .catalog-filters-mobile {
        display: block;
    }

    .catalog-filters-mobile__btn {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 12px 20px;
        background: var(--color-white);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        font-size: var(--font-size-sm);
        font-weight: var(--font-weight-semibold);
        color: var(--color-text);
        cursor: pointer;
        transition: all var(--transition-base);
        width: 100%;
        justify-content: center;
    }

    .catalog-filters-mobile__btn:hover {
        border-color: var(--color-text);
    }

    .catalog-filters-mobile__count {
        min-width: 22px;
        height: 22px;
        padding: 0 6px;
        border-radius: var(--radius-full);
        background: var(--color-primary);
        color: var(--color-white);
        font-size: 11px;
        line-height: 22px;
        font-weight: var(--font-weight-bold);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        box-sizing: border-box;
    }

}