/* Category Page - Mobile First */
:root {
    --primary: #0B4F6C;
    --primary-dark: #083b4f;
    --primary-light: #1a6b8a;
    --secondary: #10B981;
    --accent: #F59E0B;
    --danger: #EF4444;
    --dark: #1F2937;
    --gray-800: #1F2937;
    --gray-700: #374151;
    --gray-600: #4B5563;
    --gray-500: #6B7280;
    --gray-400: #9CA3AF;
    --gray-300: #D1D5DB;
    --gray-200: #E5E7EB;
    --gray-100: #F3F4F6;
    --white: #FFFFFF;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
    --radius: 12px;
    --radius-sm: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--gray-100);
    color: var(--dark);
    line-height: 1.4;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}

.logo-circle {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 18px;
    font-style: italic;
}

.logo-text {
    font-weight: 700;
    font-size: 18px;
    color: var(--primary);
}

.logo-text span {
    color: var(--primary);
}

.search-toggle {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--gray-100);
    border-radius: 50%;
    color: var(--gray-600);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.search-toggle:active {
    background: var(--gray-200);
    transform: scale(0.95);
}

/* Search Bar */
.search-bar {
    display: none;
    padding: 8px 16px 16px;
    border-top: 1px solid var(--gray-200);
    background: var(--white);
}

.search-bar.show {
    display: flex;
    gap: 8px;
}

.search-bar input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: 30px;
    font-size: 15px;
    background: var(--gray-100);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
}

.search-close {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--gray-100);
    border-radius: 50%;
    color: var(--gray-600);
    font-size: 18px;
    cursor: pointer;
}

/* Category Header */
.category-header {
    background: var(--white);
    padding: 20px 16px;
    border-bottom: 1px solid var(--gray-200);
}

.category-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.category-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    flex-shrink: 0;
}

.category-details {
    flex: 1;
}

.category-details h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.category-tagline {
    font-size: 14px;
    color: var(--gray-600);
    font-style: italic;
    margin-bottom: 8px;
}

.category-stats {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--gray-500);
}

.category-stats span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.category-stats i {
    color: var(--primary);
}

/* Filter Bar */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 69px;
    z-index: 90;
}

.filter-btn, .sort-btn {
    padding: 10px 16px;
    border: 1px solid var(--gray-300);
    border-radius: 30px;
    background: var(--white);
    color: var(--gray-700);
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:active, .sort-btn:active {
    background: var(--gray-100);
    transform: scale(0.97);
}

.filter-btn i, .sort-btn i {
    color: var(--primary);
}

.product-count {
    margin-left: auto;
    font-size: 13px;
    color: var(--gray-500);
}

/* Filter Panel */
.filter-panel {
    display: none;
    background: var(--white);
    padding: 20px 16px;
    border-bottom: 1px solid var(--gray-200);
    animation: slideDown 0.2s ease;
}

.filter-panel.show {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.filter-section {
    margin-bottom: 20px;
}

.filter-section h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--gray-800);
}

.price-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.price-inputs input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

.price-inputs span {
    color: var(--gray-500);
    font-size: 14px;
}

.filter-section select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--white);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-700);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.filter-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.apply-btn, .reset-btn {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.apply-btn {
    background: var(--primary);
    color: white;
}

.apply-btn:active {
    background: var(--primary-dark);
    transform: scale(0.98);
}

.reset-btn {
    background: var(--white);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.reset-btn:active {
    background: var(--gray-100);
}

/* Sort Panel */
.sort-panel {
    display: none;
    background: var(--white);
    padding: 12px;
    border-bottom: 1px solid var(--gray-200);
    animation: slideDown 0.2s ease;
}

.sort-panel.show {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sort-option {
    padding: 14px 16px;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    font-size: 15px;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    text-align: left;
}

.sort-option:active {
    background: var(--primary);
    color: white;
    transform: scale(0.98);
}

.sort-option i {
    width: 20px;
    color: var(--primary);
}

.sort-option:active i {
    color: white;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 16px;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: all 0.2s;
    cursor: pointer;
    position: relative;
}

.product-card:active {
    transform: scale(0.98);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

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

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--accent);
    color: var(--dark);
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 10px;
    font-weight: 600;
    z-index: 2;
}

.product-verified {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--secondary);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    z-index: 2;
}

.product-info {
    padding: 12px;
}

.product-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--gray-800);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
    min-height: 40px;
}

.product-price {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.product-price small {
    font-size: 11px;
    font-weight: 400;
    color: var(--gray-500);
    margin-left: 4px;
}

.product-supplier {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--gray-500);
    margin-bottom: 4px;
}

.product-supplier i {
    color: var(--primary);
    font-size: 10px;
}

.product-moq {
    font-size: 11px;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    gap: 4px;
}

.product-moq i {
    color: var(--primary);
    font-size: 10px;
}

/* Loading States */
.loading-grid {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 16px;
    color: var(--gray-500);
}

.loading-header {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 2px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    animation: modalSlideUp 0.2s ease;
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray-500);
}

.modal-body {
    padding: 20px;
}

/* Quick View */
.quickview-image {
    width: 100%;
    height: 250px;
    background: var(--gray-100);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 16px;
}

.quickview-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.quickview-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.quickview-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.quickview-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--gray-100);
    border-radius: var(--radius);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-size: 11px;
    color: var(--gray-500);
    text-transform: uppercase;
}

.meta-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
}

.quickview-description {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 24px;
}

.quickview-actions {
    display: flex;
    gap: 12px;
}

.contact-btn {
    flex: 1;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
}

.contact-btn:active {
    background: var(--primary-dark);
    transform: scale(0.98);
}

.inquiry-btn {
    flex: 1;
    padding: 14px;
    background: var(--white);
    color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
}

.inquiry-btn:active {
    background: var(--gray-100);
}

/* Footer */
.footer {
    padding: 20px 16px;
    text-align: center;
    border-top: 1px solid var(--gray-200);
    color: var(--gray-500);
    font-size: 12px;
    background: var(--white);
}

/* Desktop */
@media (min-width: 768px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        padding: 24px;
    }
    
    .category-header {
        padding: 30px 24px;
    }
    
    .category-icon {
        width: 80px;
        height: 80px;
        font-size: 32px;
    }
    
    .category-details h1 {
        font-size: 32px;
    }
    
    .filter-bar {
        padding: 12px 24px;
    }
    
    .filter-panel, .sort-panel {
        padding: 20px 24px;
    }
    
    .header-content {
        max-width: 1200px;
        margin: 0 auto;
        padding: 16px 24px;
    }
}

@media (min-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Small Mobile */
@media (max-width: 380px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-image {
        aspect-ratio: 16/9;
    }
}