body {
            margin: 0;
            font-family: Arial, sans-serif;
            background-color: #ffffff;
        }
        .banner {
            width: 100%;
            background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
            color: #fff;
            padding: 20px 30px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 15px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        .banner .logo {
            font-size: 36px;
            font-weight: bold;
            letter-spacing: 4px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .banner .logo a {
            color: #fff;
            text-decoration: none;
        }
        .detail-page {
            padding: 30px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .back-button {
            background: #000;
            color: #fff;
            border: none;
            padding: 12px 30px;
            border-radius: 25px;
            cursor: pointer;
            font-size: 16px;
            margin-bottom: 30px;
            transition: 0.3s;
            text-decoration: none;
            display: inline-block;
        }
        .back-button:hover {
            background: #333;
            transform: translateY(-2px);
        }
        .detail-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .image-section {
            position: relative;
        }
        .detail-image {
            width: 100%;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.2);
            cursor: zoom-in;
            transition: transform 0.3s ease;
        }
        .detail-image:hover {
            transform: scale(1.02);
        }
        .zoom-icon {
            position: absolute;
            top: 15px;
            right: 15px;
            background: rgba(0,0,0,0.7);
            color: white;
            padding: 10px 15px;
            border-radius: 25px;
            font-size: 14px;
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .image-section:hover .zoom-icon {
            opacity: 1;
        }
        .zoom-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.95);
            z-index: 1000;
            justify-content: center;
            align-items: center;
            cursor: zoom-out;
        }
        .zoom-modal.active {
            display: flex;
        }
        .zoom-modal img {
            max-width: 90%;
            max-height: 90%;
            border-radius: 10px;
        }
        .close-zoom {
            position: absolute;
            top: 20px;
            right: 30px;
            color: white;
            font-size: 40px;
            cursor: pointer;
            font-weight: bold;
        }
        .detail-info h1 {
            font-size: 32px;
            margin-bottom: 10px;
        }
        .detail-price {
            font-size: 28px;
            color: #009900;
            font-weight: bold;
            margin: 20px 0;
        }
        .detail-description {
            line-height: 1.8;
            color: #555;
            margin: 20px 0;
        }
        .size-selector {
            margin: 30px 0;
        }
        .size-selector h3 {
            margin-bottom: 15px;
        }
        .size-buttons {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .size-btn {
            padding: 10px 20px;
            border: 2px solid #ddd;
            background: #fff;
            border-radius: 8px;
            cursor: pointer;
            transition: 0.3s;
            font-size: 16px;
        }
        .size-btn:hover, .size-btn.selected {
            border-color: #000;
            background: #000;
            color: #fff;
        }
        .add-to-cart {
            background: #000;
            color: #fff;
            border: none;
            padding: 15px 40px;
            border-radius: 25px;
            cursor: pointer;
            font-size: 18px;
            font-weight: bold;
            transition: 0.3s;
            width: 100%;
            margin-top: 20px;
        }
        .add-to-cart:hover {
            background: #333;
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .detail-content {
                grid-template-columns: 1fr;
            }
        }