/* ============================================
   SMART FILTERS - CATEGORY-AWARE JEWELRY FILTERING
   ============================================ */

.collection-page {
    padding: var(--space-8) 0;
    min-height: 60vh;
}

.collection-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.collection-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--space-2);
}

.collection-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
}

/* ============================================
   LAYOUT
   ============================================ */

.collection-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-8);
    align-items: start;
}

/* ============================================
   FILTERS SIDEBAR (DESKTOP)
   ============================================ */

.filters-sidebar {
    position: sticky;
    top: 100px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.filters-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--gray-200);
}

.filters-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--black);
    margin: 0;
}

.filter-clear {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition-fast);
}

.filter-clear:hover {
    color: var(--primary-dark);
}

/* Filter Groups */
.filter-group {
    margin-bottom: var(--space-6);
}

.filter-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-3);
}

.filter-label i {
    color: var(--primary);
    font-size: 0.875rem;
}

/* Input Fields */
.filter-input,
.filter-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-family: var(--font-primary);
    transition: var(--transition-fast);
    background: var(--white);
}

.filter-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(123, 31, 162, 0.1);
}

/* Size Options Grid */
.size-options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
}

.size-option-label {
    cursor: pointer;
}

.size-option-label input {
    display: none;
}

.size-option-btn {
    display: block;
    padding: var(--space-3);
    text-align: center;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    transition: var(--transition-fast);
    background: var(--white);
}

.size-option-label input:checked + .size-option-btn {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary-dark);
}

.size-option-btn:hover {
    border-color: var(--primary);
}

/* Price Inputs */
.price-inputs {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.price-inputs input {
    flex: 1;
}

.price-inputs span {
    color: var(--gray-500);
    font-weight: 600;
}

/* Price Quick Filters */
.price-quick-filters {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.price-tag {
    padding: var(--space-2) var(--space-3);
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition-fast);
}

.price-tag:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* Apply Button */
.filter-apply-btn {
    width: 100%;
    margin-top: var(--space-4);
}

/* ============================================
   PRODUCTS SECTION
   ============================================ */

.products-section {
    width: 100%;
}

.products-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.mobile-filter-toggle {
    display: none;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mobile-filter-toggle:hover {
    background: var(--primary-dark);
}

.products-count {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-700);
}

.sort-label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-700);
}

.sort-select {
    padding: var(--space-2) var(--space-4);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    background: var(--white);
    cursor: pointer;
    transition: var(--transition-fast);
}

.sort-select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-6);
}

.product-card {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-badge {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 10;
}

.product-badge.discount {
    background: #F44336;
    color: var(--white);
}

.product-badge.featured {
    background: var(--primary);
    color: var(--white);
}

.product-link {
    text-decoration: none;
    color: inherit;
}

.product-image {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--gray-100);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-info {
    padding: var(--space-4);
}

.product-category {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-2);
}

.product-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
    line-height: 1.4;
}

.product-meta {
    font-size: 0.8125rem;
    color: var(--gray-600);
    margin-bottom: var(--space-3);
}

.product-price {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.current-price {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary);
}

.original-price {
    font-size: 0.9375rem;
    color: var(--gray-500);
    text-decoration: line-through;
}

/* No Products */
.no-products {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-12) var(--space-6);
}

.no-products i {
    font-size: 4rem;
    color: var(--gray-300);
    margin-bottom: var(--space-4);
}

.no-products h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.no-products p {
    font-size: 1rem;
    color: var(--gray-600);
    margin-bottom: var(--space-6);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.pagination-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.pagination-info {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-700);
}

/* ============================================
   MOBILE FILTER BOTTOM SHEET
   ============================================ */

.mobile-filter-sheet {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.mobile-filter-sheet.active {
    opacity: 1;
    pointer-events: all;
}

.filter-sheet-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.filter-sheet-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 85vh;
    background: var(--white);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-filter-sheet.active .filter-sheet-content {
    transform: translateY(0);
}

.filter-sheet-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-5);
    border-bottom: 1px solid var(--gray-200);
}

.filter-sheet-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

.filter-sheet-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    color: var(--gray-700);
    cursor: pointer;
}

.filter-sheet-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-5);
}

.filter-sheet-footer {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-5);
    border-top: 1px solid var(--gray-200);
}

.filter-sheet-footer .btn {
    flex: 1;
}

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

@media (max-width: 1024px) {
    .collection-layout {
        grid-template-columns: 1fr;
    }
    
    .filters-sidebar {
        display: none;
    }
    
    .desktop-only {
        display: none !important;
    }
    
    .mobile-filter-toggle {
        display: flex;
    }
    
    .mobile-filter-sheet {
        display: block;
    }
}

@media (max-width: 768px) {
    .collection-title {
        font-size: 2rem;
    }
    
    .products-toolbar {
        flex-direction: column;
        gap: var(--space-3);
        align-items: stretch;
    }
    
    .toolbar-left,
    .toolbar-right {
        width: 100%;
        justify-content: space-between;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: var(--space-4);
    }
}

@media (max-width: 480px) {
    .collection-page {
        padding: var(--space-6) 0;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }
    
    .product-info {
        padding: var(--space-3);
    }
    
    .product-name {
        font-size: 0.875rem;
    }
    
    .current-price {
        font-size: 1rem;
    }
}