:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4895ef;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --success-color: #4cc9f0;
    --danger-color: #e63946;
    --warning-color: #f4a261;
    --info-color: #48cae4;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --font-family: 'Noto Sans Lao', 'Prompt', sans-serif;
}

/* Base Styles */
.products-page {
    font-family: var(--font-family);
    background-color: #fafbfc;
}

/* Filter Section */
.filter-section {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin-bottom: 2.5rem;
    border: 1px solid #eef2f7;
}

.filter-section .form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control,
.form-select {
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    border: 1px solid #e2e8f0;
    transition: var(--transition);
    font-size: 0.95rem;
}

.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
    border-color: var(--primary-color);
    background-color: #fff;
}

.input-group-text {
    background-color: var(--light-color);
    border: 1px solid #e2e8f0;
    border-right: none;
    color: #6c757d;
}

.input-group .form-control {
    border-left: none;
}

.input-group .form-control:focus {
    border-left: none;
}

/* Buttons */
.btn-filter {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    padding: 0.875rem 1.5rem;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.btn-filter:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(67, 97, 238, 0.3);
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
}

/* Page Title */
.page-title {
    font-weight: 800;
    color: var(--dark-color);
    position: relative;
    padding-bottom: 1rem;
    margin-bottom: 2rem;
    font-size: 2.2rem;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 5px;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    border-radius: 10px;
}

/* Product Cards */
.product-card {
    transition: var(--transition);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: none;
    height: 100%;
    background: white;
    box-shadow: var(--box-shadow);
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-hover);
}

.product-image-container {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
}

.product-image {
    height: 220px;
    width: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

/* Badges */
.discount-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: linear-gradient(135deg, var(--danger-color), #ff6b6b);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
    z-index: 2;
}

.stock-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 2;
    backdrop-filter: blur(10px);
}

.stock-badge.in-stock {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
}

.stock-badge.out-of-stock {
    background: linear-gradient(135deg, #95a5a6, #7f8c8d);
}

/* Card Body */
.card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-title {
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.6em;
}

.product-description {
    color: #6c757d;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

/* Price Section */
.price-section {
    margin-bottom: 1rem;
}

.product-price {
    font-weight: 800;
    color: var(--primary-color);
    font-size: 1.3rem;
    line-height: 1;
}

.original-price {
    text-decoration: line-through;
    color: #95a5a6;
    font-size: 0.9rem;
    margin-left: 0.5rem;
}

.discount-price {
    color: var(--danger-color);
    font-weight: 700;
}

/* Card Footer */
.card-footer {
    background: transparent;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1rem 1.5rem;
}

.btn-outline-primary {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.5rem 1rem;
    transition: var(--transition);
    border-width: 2px;
}

.btn-outline-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.2);
}

/* Results Count */
#resultsCount {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Loading Spinner */
.loading-spinner {
    display: none;
    width: 3rem;
    height: 3rem;
    margin: 3rem auto;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: #6c757d;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    color: #dee2e6;
    opacity: 0.7;
}

.empty-state h5 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #495057;
}

.empty-state p {
    color: #6c757d;
    margin-bottom: 0;
}

/* Pagination */
.pagination-container {
    margin-top: 2rem;
}

.pagination-container .pagination {
    margin-bottom: 0;
}

.page-item .page-link {
    border-radius: var(--border-radius);
    margin: 0 3px;
    border: none;
    color: var(--dark-color);
    font-weight: 600;
    padding: 0.75rem 1rem;
    transition: var(--transition);
    background-color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.page-item .page-link:hover {
    background-color: var(--light-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
}

.page-item.disabled .page-link {
    background-color: #f8f9fa;
    color: #6c757d;
    box-shadow: none;
}

/* Category Badge */
.category-badge {
    background: linear-gradient(135deg, var(--success-color), #00b4d8);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .filter-section {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .filter-section .row {
        gap: 1rem;
    }
    
    .filter-section .col-md-3,
    .filter-section .col-md-2 {
        margin-bottom: 0;
    }
    
    .page-title {
        font-size: 1.8rem;
        text-align: center;
    }
    
    .page-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .product-card {
        margin-bottom: 1.5rem;
    }
    
    .product-image {
        height: 200px;
    }
    
    .card-body {
        padding: 1.25rem;
    }
    
    .pagination-container .pagination {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .page-item .page-link {
        margin: 2px;
        padding: 0.6rem 0.8rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .filter-section {
        padding: 1rem;
    }
    
    .btn-filter {
        width: 100%;
        margin-top: 0.5rem;
    }
    
    .product-title {
        font-size: 1rem;
    }
    
    .product-price {
        font-size: 1.1rem;
    }
}

/* Animation for new products */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-card {
    animation: fadeInUp 0.5s ease-out;
}

/* Hover effects for interactive elements */
.form-control:hover,
.form-select:hover {
    border-color: var(--accent-color);
}

.input-group:hover .input-group-text {
    border-color: var(--accent-color);
    color: var(--primary-color);
}

/* Focus states for accessibility */
.btn-filter:focus,
.form-control:focus,
.form-select:focus,
.page-link:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.25);
}

/* Print styles */
@media print {
    .filter-section,
    .pagination-container,
    .btn-outline-primary {
        display: none;
    }
    
    .product-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}