* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary: #000;
            --secondary: #fff;
            --accent: #ff6b35;
            --accent-light: #ffd4a8;
            --text-dark: #1a1a1a;
            --text-light: #666;
            --border: #e0e0e0;
            --bg-light: #f8f8f8;
            --shadow: 0 10px 40px rgba(0,0,0,0.1);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
        }

        body.dark-mode {
            --primary: #1a1a1a;
            --secondary: #2a2a2a;
            --text-dark: #fff;
            --text-light: #999;
            --border: #333;
            --bg-light: #333;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--secondary);
            color: var(--text-dark);
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        /* ===== NAVBAR ===== */
        nav {
            position: sticky;
            top: 0;
            background: var(--secondary);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 2rem;
            max-width: 1400px;
            margin: 0 auto;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, #ff6b35, #004e89);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            cursor: pointer;
            transition: transform 0.3s ease;
        }

        .logo:hover {
            transform: scale(1.05);
        }

        .nav-menu {
            display: flex;
            gap: 2.5rem;
            list-style: none;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s ease;
            position: relative;
        }

        .nav-menu a:hover {
            color: var(--accent);
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.3s ease;
        }

        .nav-menu a:hover::after {
            width: 100%;
        }

        .nav-icons {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        .icon-btn {
            background: none;
            border: none;
            font-size: 1.3rem;
            cursor: pointer;
            transition: transform 0.3s ease, color 0.3s ease;
            color: var(--text-dark);
            position: relative;
        }

        .icon-btn:hover {
            transform: scale(1.2);
            color: var(--accent);
        }

        .cart-count {
            position: absolute;
            top: -8px;
            right: -10px;
            background: var(--accent);
            color: white;
            border-radius: 50%;
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
        }

        .hamburger span {
            width: 25px;
            height: 3px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: 0.3s;
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(10px, 10px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(8px, -8px);
        }

        /* ===== MAIN CONTAINER ===== */
        main {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: start;
            padding: 4rem 0;
        }

        /* ===== PRODUCT IMAGE SECTION ===== */
        .product-images {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .main-image {
            position: relative;
            width: 100%;
            height: 600px;
            background: var(--bg-light);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            cursor: zoom-in;
        }

        .main-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .main-image:hover img {
            transform: scale(1.1);
        }

        .zoom-indicator {
            position: absolute;
            bottom: 15px;
            right: 15px;
            background: rgba(0,0,0,0.6);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .main-image:hover .zoom-indicator {
            opacity: 1;
        }

        .thumbnails {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }

        .thumbnail {
            height: 120px;
            background: var(--bg-light);
            border-radius: 8px;
            cursor: pointer;
            overflow: hidden;
            border: 2px solid transparent;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
        }

        .thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .thumbnail:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }

        .thumbnail.active {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-light);
        }

        /* ===== PRODUCT DETAILS ===== */
        .product-details {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .product-title {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.2;
            font-family: 'Playfair Display', serif;
        }

        .rating {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .stars {
            display: flex;
            gap: 0.3rem;
        }

        .star {
            color: #ffc107;
            font-size: 1.1rem;
        }

        .review-info {
            color: var(--text-light);
            font-size: 0.95rem;
        }

        .review-link {
            color: var(--accent);
            text-decoration: none;
            cursor: pointer;
            transition: color 0.3s ease;
        }

        .review-link:hover {
            text-decoration: underline;
        }

        /* ===== PRICING ===== */
        .pricing {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding: 1.5rem;
            background: var(--bg-light);
            border-radius: 12px;
        }

        .price {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
        }

        .original-price {
            font-size: 1.1rem;
            text-decoration: line-through;
            color: var(--text-light);
        }

        .discount {
            background: var(--accent-light);
            color: var(--accent);
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-weight: 600;
            font-size: 0.9rem;
        }

        /* ===== DESCRIPTION ===== */
        .description {
            color: var(--text-light);
            line-height: 1.8;
            font-size: 1rem;
        }

        /* ===== FEATURES ===== */
        .features {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
            padding: 1.5rem;
            background: var(--bg-light);
            border-radius: 12px;
        }

        .feature {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
        }

        .feature-icon {
            font-size: 1.5rem;
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        .feature-text {
            font-size: 0.95rem;
        }

        .feature-text strong {
            display: block;
            margin-bottom: 0.3rem;
            color: var(--text-dark);
        }

        /* ===== SELECTORS ===== */
        .selectors {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .selector-group {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .selector-label {
            font-weight: 600;
            font-size: 0.95rem;
        }

        .options {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .option-btn {
            padding: 0.75rem 1.5rem;
            background: var(--bg-light);
            border: 2px solid transparent;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-dark);
        }

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

        .option-btn.active {
            background: var(--accent);
            color: white;
            border-color: var(--accent);
        }

        /* ===== QUANTITY ===== */
        .quantity-selector {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            width: fit-content;
            border-radius: 8px;
            padding: 0.5rem;
            gap: 1rem;
        }

        .qty-btn {
            background: none;
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            width: 40px;
            height: 40px;
            border-radius: 6px;
            transition: all 0.3s ease;
            color: var(--text-dark);
        }

        .qty-btn:hover {
            background: var(--border);
        }

        .qty-input {
            width: 50px;
            text-align: center;
            border: none;
            background: none;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
        }

        .qty-input:focus {
            outline: none;
        }

        /* ===== BUTTONS ===== */
        .action-buttons {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 1rem;
        }

        .btn {
            padding: 1rem 2rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .btn-primary {
            background: var(--accent);
            color: white;
            flex: 1;
            position: relative;
            overflow: hidden;
        }

        .btn-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255, 107, 53, 0.3);
        }

        .btn-primary:hover::before {
            left: 100%;
        }

        .wishlist-btn {
            width: 50px;
            height: 50px;
            border: 2px solid var(--border);
            background: var(--secondary);
            border-radius: 8px;
            cursor: pointer;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .wishlist-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .wishlist-btn.active {
            background: var(--accent-light);
            border-color: var(--accent);
            color: var(--accent);
        }

        /* ===== DELIVERY INFO ===== */
        .delivery-info {
            padding: 1.5rem;
            background: var(--bg-light);
            border-radius: 12px;
            border-left: 4px solid var(--accent);
        }

        .delivery-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.8rem 0;
            border-bottom: 1px solid var(--border);
        }

        .delivery-item:last-child {
            border-bottom: none;
        }

        .delivery-icon {
            font-size: 1.8rem;
            flex-shrink: 0;
        }

        .delivery-text strong {
            display: block;
            margin-bottom: 0.2rem;
        }

        .delivery-text small {
            color: var(--text-light);
            font-size: 0.85rem;
        }

        /* ===== TOAST NOTIFICATION ===== */
        .toast {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent);
            color: white;
            padding: 1.5rem 2rem;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            animation: slideIn 0.4s ease-out;
            z-index: 2000;
        }

        @keyframes slideIn {
            from {
                transform: translateX(400px);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        /* ===== SPECIFICATIONS ===== */
        .specifications {
            margin: 4rem 0;
            padding: 2rem;
            background: var(--bg-light);
            border-radius: 12px;
        }

        .specifications h2 {
            font-size: 1.8rem;
            margin-bottom: 2rem;
            font-family: 'Playfair Display', serif;
        }

        .specs-table {
            width: 100%;
            border-collapse: collapse;
        }

        .specs-table tr {
            border-bottom: 1px solid var(--border);
        }

        .specs-table td {
            padding: 1.2rem;
            font-size: 0.95rem;
        }

        .specs-table td:first-child {
            font-weight: 600;
            width: 35%;
            color: var(--text-dark);
        }

        /* ===== REVIEWS SECTION ===== */
        .reviews-section {
            margin: 4rem 0;
        }

        .section-title {
            font-size: 2rem;
            margin-bottom: 2rem;
            font-family: 'Playfair Display', serif;
        }

        .reviews-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .review-card {
            padding: 1.5rem;
            background: var(--bg-light);
            border-radius: 12px;
            transition: all 0.3s ease;
        }

        .review-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }

        .reviewer-info {
            display: flex;
            gap: 1rem;
            margin-bottom: 1rem;
            align-items: center;
        }

        .reviewer-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), #004e89);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            flex-shrink: 0;
        }

        .reviewer-name {
            font-weight: 600;
        }

        .reviewer-date {
            font-size: 0.85rem;
            color: var(--text-light);
        }

        .review-rating {
            margin-bottom: 0.8rem;
        }

        .review-text {
            color: var(--text-light);
            line-height: 1.6;
            font-size: 0.95rem;
        }

        /* ===== RELATED PRODUCTS ===== */
        .related-products {
            margin: 4rem 0;
        }

        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .product-card {
            border-radius: 12px;
            overflow: hidden;
            background: var(--bg-light);
            transition: all 0.3s ease;
            cursor: pointer;
        }

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

        .product-card-image {
            width: 100%;
            height: 250px;
            background: var(--border);
            overflow: hidden;
            position: relative;
        }

        .product-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .product-card:hover .product-card-image img {
            transform: scale(1.1);
        }

        .product-card-info {
            padding: 1.5rem;
        }

        .product-card-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }

        .product-card-price {
            color: var(--accent);
            font-weight: 700;
            font-size: 1.1rem;
        }

        /* ===== FOOTER ===== */
        footer {
            background: var(--primary);
            color: var(--secondary);
            margin-top: 4rem;
            padding: 3rem 2rem;
        }

        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-section h3 {
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .footer-section ul {
            list-style: none;
        }

        .footer-section a {
            display: block;
            margin-bottom: 0.7rem;
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 0.9rem;
        }

        .footer-section a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            text-align: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 768px) {
            .container {
                grid-template-columns: 1fr;
                gap: 2rem;
                padding: 2rem 0;
            }

            .main-image {
                height: 400px;
            }

            .product-title {
                font-size: 1.8rem;
            }

            .navbar {
                padding: 1rem 1.5rem;
            }

            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: var(--secondary);
                padding: 1rem;
                gap: 1rem;
                border-bottom: 1px solid var(--border);
            }

            .nav-menu.active {
                display: flex;
            }

            .hamburger {
                display: flex;
            }

            .features {
                grid-template-columns: 1fr;
            }

            .action-buttons {
                grid-template-columns: 1fr;
            }

            .thumbnails {
                grid-template-columns: repeat(3, 1fr);
            }

            .reviews-container {
                grid-template-columns: 1fr;
            }

            .products-grid {
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            }

            main {
                padding: 0 1rem;
            }
        }

        @media (max-width: 480px) {
            .product-title {
                font-size: 1.5rem;
            }

            .price {
                font-size: 1.5rem;
            }

            .navbar {
                padding: 0.8rem 1rem;
            }

            .logo {
                font-size: 1.3rem;
            }

            .nav-icons {
                gap: 1rem;
            }

            .thumbnails {
                grid-template-columns: repeat(2, 1fr);
            }

            .options {
                flex-wrap: wrap;
            }

            .option-btn {
                flex: 1;
                min-width: 80px;
            }

            .btn {
                padding: 0.8rem 1.5rem;
                font-size: 0.9rem;
            }
        }