:root {
            --primary-blue: #1976d2;
            --dark-blue: #1565c0;
            --orange: #ff9800;
            --light-gray: #f5f5f5;
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #fff;
            color: #333;
        }

        .logo {
            font-size: 28px;
            font-weight: bold;
            transition: transform 0.3s ease;
        }

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

        .search-bar {
            border-radius: 25px;
            border: none;
            padding: 10px 20px;
            transition: box-shadow 0.3s ease;
        }

        .search-bar:focus {
            box-shadow: 0 0 15px rgba(255,255,255,0.3);
        }

        .breadcrumb {
            background: transparent;
            padding: 15px 0;
            font-size: 14px;
        }

        .product-image-section {
            background: white;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s ease;
        }

        .product-image-section:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 25px rgba(0,0,0,0.12);
        }

        .main-image {
            width: 100%;
            max-height: 500px;
            object-fit: contain;
            transition: transform 0.5s ease;
        }

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

        .thumbnail {
            width: 80px;
            height: 80px;
            object-fit: cover;
            cursor: pointer;
            border: 2px solid transparent;
            border-radius: 8px;
            transition: all 0.3s ease;
            opacity: 0.7;
        }

        .thumbnail:hover, .thumbnail.active {
            border-color: var(--primary-blue);
            opacity: 1;
            transform: scale(1.1);
        }

        .price {
            font-size: 32px;
            font-weight: bold;
            color: var(--primary-blue);
            animation: fadeInUp 0.6s ease;
        }

        .old-price {
            text-decoration: line-through;
            color: #999;
            font-size: 18px;
        }

        .discount-badge {
            background: var(--orange);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 14px;
            display: inline-block;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }

        .btn-primary {
            background: var(--primary-blue);
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
            text-transform: uppercase;
        }

        .btn-primary:hover {
            background: var(--dark-blue);
            transform: translateY(-2px);
            box-shadow: 0 5px 20px rgba(25, 118, 210, 0.4);
        }

        .btn-outline-primary {
            border: 2px solid var(--primary-blue);
            color: var(--primary-blue);
            padding: 15px 30px;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-outline-primary:hover {
            background: var(--primary-blue);
            color: white;
            transform: translateY(-2px);
        }

        .info-card {
            background: white;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }

        .info-card:hover {
            box-shadow: 0 5px 25px rgba(0,0,0,0.12);
            transform: translateX(5px);
        }

        .feature-icon {
            color: var(--primary-blue);
            font-size: 20px;
            margin-right: 10px;
        }

        .rating {
            color: var(--orange);
            font-size: 18px;
        }

        .specifications {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            margin-top: 30px;
        }

        .spec-item {
            padding: 15px 0;
            border-bottom: 1px solid #eee;
            transition: background 0.3s ease;
        }

        .spec-item:hover {
            background: var(--light-gray);
            padding-left: 10px;
        }

        .spec-label {
            font-weight: 600;
            color: #666;
        }

        .seller-info {
            background: linear-gradient(135deg, var(--light-gray), white);
            padding: 20px;
            border-radius: 10px;
            border-left: 4px solid var(--primary-blue);
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in {
            animation: fadeInUp 0.6s ease forwards;
        }

        .quantity-selector {
            display: flex;
            align-items: center;
            gap: 15px;
            margin: 20px 0;
        }

        .quantity-btn {
            width: 40px;
            height: 40px;
            border: 2px solid var(--primary-blue);
            background: white;
            color: var(--primary-blue);
            border-radius: 50%;
            font-size: 20px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .quantity-btn:hover {
            background: var(--primary-blue);
            color: white;
            transform: scale(1.1);
        }

        .quantity-display {
            font-size: 20px;
            font-weight: bold;
            min-width: 40px;
            text-align: center;
        }

        @media (max-width: 768px) {
            .price {
                font-size: 24px;
            }
            
            .main-image {
                max-height: 300px;
            }
        }