:root {
            --primary: #1a365d;
            --secondary: #2d3748;
            --accent: #3182ce;
            --bg: #f7fafc;
            --white: #ffffff;
            --text: #2d3748;
            --border: #e2e8f0;
            --success: #48bb78;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1600px;
            width: 80%;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        @media (max-width: 1400px) {
            .container {
                width: 85%;
            }
        }
        
        @media (max-width: 1200px) {
            .container {
                width: 90%;
            }
        }
        
        @media (max-width: 992px) {
            .container {
                width: 95%;
            }
        }
        
        @media (max-width: 768px) {
            .container {
                width: 100%;
                padding: 0 15px;
            }
        }
        
        /* Header */
        header {
            background: var(--white);
            border-bottom: 2px solid var(--primary);
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
        }
        
        .logo:hover {
            color: var(--accent);
        }
        
        .cart-icon {
            position: relative;
            cursor: pointer;
            font-size: 24px;
            color: var(--primary);
        }
        
        .cart-icon:hover {
            color: var(--accent);
        }
        
        .cart-count {
            position: absolute;
            top: -8px;
            right: -8px;
            background: #e53e3e;
            color: white;
            font-size: 12px;
            font-weight: 600;
            padding: 2px 6px;
            border-radius: 50%;
            min-width: 18px;
            text-align: center;
        }
        
        /* Shopping Cart Modal */
        .cart-modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 3000;
            justify-content: center;
            align-items: center;
        }
        
        .cart-modal-overlay.active {
            display: flex;
        }
        
        .cart-modal {
            background: white;
            border-radius: 12px;
            padding: 30px;
            max-width: 500px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
            position: relative;
        }
        
        .cart-modal h3 {
            color: var(--primary);
            margin-bottom: 20px;
            font-size: 24px;
        }
        
        .cart-items {
            margin-bottom: 20px;
        }
        
        .cart-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid var(--border);
        }
        
        .cart-item-info {
            flex: 1;
        }
        
        .cart-item-name {
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 5px;
        }
        
        .cart-item-price {
            color: #718096;
            font-size: 14px;
        }
        
        .cart-item-remove {
            background: #fed7d7;
            color: #c53030;
            border: none;
            padding: 5px 12px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 13px;
            margin-left: 10px;
        }
        
        .cart-item-remove:hover {
            background: #feb2b2;
        }
        
        .cart-total {
            border-top: 2px solid var(--border);
            padding-top: 15px;
            margin-top: 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
        }
        
        .cart-actions {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }
        
        .cart-btn {
            flex: 1;
            padding: 12px;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            text-align: center;
            text-decoration: none;
            display: block;
        }
        
        .cart-btn-checkout {
            background: var(--success);
            color: white;
        }
        
        .cart-btn-checkout:hover {
            background: #38a169;
        }
        
        .cart-btn-continue {
            background: var(--bg);
            color: var(--text);
        }
        
        .cart-btn-continue:hover {
            background: var(--border);
        }
        
        .cart-empty {
            text-align: center;
            padding: 40px 0;
            color: #718096;
        }
        
        /* Hero */
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: white;
            padding: 60px 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 36px;
            margin-bottom: 15px;
        }
        
        .hero p {
            font-size: 18px;
            opacity: 0.95;
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* Features */
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        
        .feature {
            background: var(--white);
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.08);
            text-align: center;
        }
        
        .feature h3 {
            color: var(--primary);
            margin-bottom: 10px;
            font-size: 18px;
        }
        
        /* Products Grid */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            margin: 40px 0;
        }
        
        @media (max-width: 1200px) {
            .products-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        
        @media (max-width: 992px) {
            .products-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .products-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 480px) {
            .products-grid {
                grid-template-columns: 1fr;
            }
        }
        
        .product-card {
            background: var(--white);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
            min-height: 520px;
        }
        
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        
        .product-image {
            height: 200px;
            background: #f7fafc;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            border-bottom: 1px solid var(--border);
        }
        
        .product-image img {
            max-height: 100%;
            max-width: 100%;
            object-fit: contain;
        }
        
        .product-image-placeholder {
            color: #a0aec0;
            font-size: 48px;
        }
        
        .product-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        
        .product-brand {
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        
        .product-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            line-height: 1.3;
            min-height: 42px;
        }
        
        .product-desc {
            font-size: 14px;
            color: #718096;
            margin-bottom: 15px;
            flex: 1;
            min-height: 60px;
        }
        
        .product-price-info {
            margin-top: auto;
        }
        
        .product-price {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }
        
        .product-price-exvat {
            font-size: 14px;
            color: #718096;
        }
        
        .product-sku {
            font-size: 12px;
            color: #a0aec0;
            margin-top: 10px;
        }
        
        .product-card-footer {
            padding: 15px 20px;
            background: #f7fafc;
            border-top: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex-shrink: 0;
        }
        
        .add-to-cart {
            width: 100%;
            padding: 15px;
            background: var(--success);
            color: white;
            border: none;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
            text-decoration: none;
            display: block;
            text-align: center;
        }
        
        .add-to-cart:hover {
            background: #38a169;
        }
        
        /* Footer */
        footer {
            background: var(--secondary);
            color: white;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .footer-section h3 {
            margin-bottom: 15px;
            color: var(--accent);
        }
        
        .footer-section p {
            opacity: 0.9;
            font-size: 14px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.2);
            opacity: 0.8;
            font-size: 14px;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .hero h1 { font-size: 28px; }
            .hero p { font-size: 16px; }
            .products-grid { grid-template-columns: 1fr; }
        }
        
        /* Cookie Banner */
        .cookie-banner {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--secondary);
            color: white;
            padding: 20px;
            z-index: 1000;
            box-shadow: 0 -2px 10px rgba(0,0,0,0.2);
        }
        
        .cookie-banner-content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .cookie-banner-text {
            font-size: 14px;
            line-height: 1.5;
        }
        
        .cookie-banner-text a {
            color: var(--accent);
            text-decoration: underline;
        }
        
        .cookie-banner-buttons {
            display: flex;
            gap: 10px;
        }
        
        .cookie-btn {
            padding: 10px 20px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.3s ease;
        }
        
        .cookie-btn-accept {
            background: var(--success);
            color: white;
        }
        
        .cookie-btn-accept:hover {
            background: #38a169;
        }
        
        .cookie-btn-decline {
            background: rgba(255,255,255,0.2);
            color: white;
        }
        
        .cookie-btn-decline:hover {
            background: rgba(255,255,255,0.3);
        }
        
        /* Verify Button */
        .verify-btn {
            background: #f59e0b !important;
            color: white !important;
            border: 2px solid #d97706 !important;
            margin-bottom: 0 !important;
        }
        
        .verify-btn:hover {
            background: #d97706 !important;
        }
        
        @media (max-width: 768px) {
            .products-grid { 
                grid-template-columns: 1fr !important; 
            }
            
            .hero h1 { font-size: 24px; }
            .hero p { font-size: 16px; }
        }
            .header-nav {
                justify-content: center;
                flex-direction: column;
                gap: 15px;
            }
        }
        
        /* Academic Verification Modal */
        .ai-enquiry-modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 2000;
            overflow-y: auto;
        }
        
        .ai-enquiry-modal-overlay.active {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .ai-enquiry-modal-window {
            background: white;
            border-radius: 12px;
            padding: 30px;
            max-width: 500px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            position: relative;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
        }
        
        .ai-enquiry-modal-close {
            position: absolute;
            top: 15px;
            right: 20px;
            font-size: 28px;
            font-weight: bold;
            color: #718096;
            cursor: pointer;
            line-height: 1;
            transition: color 0.3s ease;
        }
        
        .ai-enquiry-modal-close:hover {
            color: #2d3748;
        }
        
        .ai-enquiry-modal-window h3 {
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 10px;
        }
        
        .ai-enquiry-modal-window p {
            color: #718096;
            font-size: 14px;
            margin-bottom: 20px;
        }
        
        .ai-enquiry-modal-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        
        .ai-form-row-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }
        
        .ai-enquiry-modal-form label {
            font-weight: bold;
            font-size: 14px;
            color: var(--secondary);
            margin-bottom: 5px;
            display: block;
        }
        
        .ai-enquiry-modal-form input,
        .ai-enquiry-modal-form select {
            width: 100%;
            padding: 12px;
            border: 2px solid #e2e8f0;
            border-radius: 6px;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }
        
        .ai-enquiry-modal-form input:focus,
        .ai-enquiry-modal-form select:focus {
            outline: none;
            border-color: var(--accent);
        }
        
        .btn-edu-submit {
            background: var(--success);
            color: white;
            border: none;
            padding: 15px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: background 0.3s ease;
            margin-top: 10px;
        }
        
        .btn-edu-submit:hover {
            background: #38a169;
        }
        
        .btn-edu-submit:disabled {
            background: #a0aec0;
            cursor: not-allowed;
        }
        
        #email-error-verification {
            color: #d32f2f;
            font-size: 13px;
            margin-top: 5px;
            display: none;
        }
        
        .verification-notice {
            background: #ebf8ff;
            border-left: 4px solid var(--accent);
            padding: 15px;
            border-radius: 0 6px 6px 0;
            margin-bottom: 20px;
            font-size: 14px;
        }