/* ============================================
   Products Page — Layout & Material Filters
   ============================================ */

/* Sidebar + grid layout */
.products-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--space-2xl);
    margin-top: var(--space-xl);
}

/* ============================================
   Material Filter Sidebar
   ============================================ */
.material-filter {
    position: sticky;
    top: calc(var(--header-height, 80px) + var(--space-lg));
    align-self: start;
    background: var(--color-surface);
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    max-height: calc(100vh - var(--header-height, 80px) - var(--space-2xl));
    display: flex;
    flex-direction: column;
}

.material-filter__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
    flex-shrink: 0;
}

.material-filter__title {
    font-size: var(--text-base);
    font-weight: var(--font-weight-bold);
    color: var(--color-neutral);
    margin: 0;
}

.material-filter__clear {
    font-size: 0.7rem;
    color: var(--color-primary-light);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    transition: color var(--duration-hover) var(--ease-smooth);
}

.material-filter__clear:hover {
    color: var(--color-white);
}

/* Search within materials */
.material-filter__search-wrap {
    position: relative;
    margin-bottom: var(--space-md);
    flex-shrink: 0;
}

.material-filter__search {
    width: 100%;
    padding: 0.45rem 0.7rem 0.45rem 2rem;
    font-size: var(--text-sm);
    color: var(--color-neutral);
    background: var(--color-bg-main);
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    transition: border-color var(--duration-hover) var(--ease-smooth),
                box-shadow var(--duration-hover) var(--ease-smooth);
}

.material-filter__search:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(139, 26, 43, 0.15);
}

.material-filter__search-icon {
    position: absolute;
    left: 0.6rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray);
    pointer-events: none;
}

/* Active chips */
.material-filter__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: var(--space-md);
    flex-shrink: 0;
}

.material-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.5rem;
    font-size: 0.7rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary-light);
    background: rgba(139, 26, 43, 0.1);
    border: 1px solid rgba(139, 26, 43, 0.2);
    border-radius: 100px;
    white-space: nowrap;
}

.material-chip__remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    background: none;
    border: none;
    color: var(--color-primary-light);
    font-size: 0.8rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    border-radius: 50%;
    transition: color var(--duration-hover) var(--ease-smooth),
                background var(--duration-hover) var(--ease-smooth);
}

.material-chip__remove:hover {
    color: var(--color-white);
    background: rgba(139, 26, 43, 0.3);
}

/* Material list */
.material-filter__list {
    list-style: none;
    margin: 0;
    padding: 0;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.material-filter__item {
    border-bottom: 1px solid var(--color-light-gray);
}

.material-filter__item:last-child {
    border-bottom: none;
}

.material-filter__item.is-hidden {
    display: none;
}

.material-filter__label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.25rem;
    cursor: pointer;
    transition: background var(--duration-hover) var(--ease-smooth);
    border-radius: var(--radius-sm);
}

.material-filter__label:hover {
    background: var(--card-hover-bg);
}

.material-filter__item.is-selected .material-filter__label {
    background: rgba(139, 26, 43, 0.06);
}

.material-filter__checkbox {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.material-filter__name {
    flex: 1;
    font-size: 0.8125rem;
    color: var(--color-neutral);
    line-height: 1.3;
}

.material-filter__count {
    font-size: 0.7rem;
    color: var(--color-gray);
    background: var(--color-off-white);
    padding: 0.1rem 0.4rem;
    border-radius: 100px;
    min-width: 22px;
    text-align: center;
    flex-shrink: 0;
}

.material-filter__item.is-collapsed {
    display: none;
}

.material-filter__toggle {
    display: block;
    width: 100%;
    padding: 0.5rem 0;
    font-size: 0.8125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    background: none;
    border: none;
    border-top: 1px solid var(--color-light-gray);
    cursor: pointer;
    text-align: center;
    transition: color var(--duration-hover) var(--ease-smooth);
    margin-top: var(--space-xs);
}

.material-filter__toggle:hover {
    color: var(--color-primary-dark);
}

.material-filter__empty {
    font-size: var(--text-sm);
    color: var(--color-gray);
    text-align: center;
    padding: var(--space-md) 0;
}

/* Scrollbar for material list */
.material-filter__list::-webkit-scrollbar {
    width: 4px;
}

.material-filter__list::-webkit-scrollbar-track {
    background: transparent;
}

.material-filter__list::-webkit-scrollbar-thumb {
    background: var(--color-light-gray);
    border-radius: 2px;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 992px) {
    .products-layout {
        grid-template-columns: 220px 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 768px) {
    .products-layout {
        grid-template-columns: 1fr;
    }

    .material-filter {
        position: static;
        max-height: none;
        border-radius: var(--radius-md);
        padding: var(--space-md);
    }

    .material-filter__list {
        max-height: 200px;
        overflow-y: auto;
    }

    .material-filter__search {
        min-height: 40px;
    }
}

@media (max-width: 480px) {
    .product-card__actions {
        padding: 0 var(--space-sm) var(--space-sm);
    }

    .product-card__actions .btn {
        font-size: var(--text-xs);
        padding: 0.5rem 0.75rem;
        min-height: 36px;
    }
}