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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #fff;
    color: #000;
    min-height: 100vh;
}

/* Navigation Menu */
.nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid #e0e0e0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    padding: 0 2rem;
}

.nav-link {
    color: #000;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s ease;
}

.nav-link:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* Product Page */
.product-page {
    padding: 6rem 2rem 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

/* Product Gallery */
.product-gallery {
    position: sticky;
    top: 6rem;
}

.main-image {
    width: 100%;
    margin-bottom: 1rem;
    background: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
}

.main-image img {
    width: 100%;
    height: auto;
    display: block;
}

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

.thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s ease;
}

.thumbnail:hover {
    border-color: #666;
}

.thumbnail.active {
    border-color: #000;
}

/* Product Info */
.product-info h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-transform: lowercase;
    font-weight: 600;
}

.price {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #333;
}

.description {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: #666;
}

.product-options {
    margin-bottom: 2rem;
}

.option-group {
    margin-bottom: 2rem;
}

.option-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 500;
    text-transform: lowercase;
    font-size: 0.95rem;
}

.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.chip {
    padding: 0.6rem 1.2rem;
    border: 2px solid #ddd;
    border-radius: 50px;
    background: #fff;
    color: #000;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: lowercase;
}

.chip:hover {
    border-color: #000;
    background: #f5f5f5;
}

.chip.active {
    background: #000;
    color: #fff;
    border-color: #000;
}

.add-to-cart {
    width: 100%;
    padding: 1rem 2rem;
    background: #000;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: lowercase;
    cursor: pointer;
    transition: background 0.3s ease;
    margin-bottom: 3rem;
}

.add-to-cart:hover {
    background: #333;
}

.product-details {
    border-top: 1px solid #e0e0e0;
    padding-top: 2rem;
}

.product-details h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    text-transform: lowercase;
    font-weight: 600;
}

.product-details ul {
    list-style: none;
    padding: 0;
}

.product-details li {
    padding: 0.5rem 0;
    color: #666;
    border-bottom: 1px solid #f0f0f0;
}

.product-details li:last-child {
    border-bottom: none;
}

/* Responsive */
@media (max-width: 968px) {
    .product-page {
        padding: 5rem 1.5rem 3rem;
    }
    
    .product-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .product-gallery {
        position: static;
    }
    
    .product-info h1 {
        font-size: 2rem;
    }
    
    .price {
        font-size: 1.75rem;
    }
    
    .nav-container {
        gap: 1rem;
        padding: 0 1rem;
        flex-wrap: wrap;
    }
    
    .nav-link {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .thumbnail {
        width: 60px;
        height: 60px;
    }
    
    .chip {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}