.product-content {
    margin-top: 80px;
    padding: 2rem 0;
}

.product-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.product-gallery {
    position: relative;
}

.main-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1rem;
}

.thumbnail-gallery {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
}

.thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 5px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s;
}

.thumbnail.active {
    border-color: #1e3a8a;
}

.product-info h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #374151;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.stars {
    color: #fbbf24;
}

.product-price {
    font-size: 2rem;
    font-weight: bold;
    color: #1e3a8a;
    margin-bottom: 2rem;
}

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

.option-group {
    margin-bottom: 1.5rem;
}

.option-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: #374151;
}

.size-options,
.painting-options {
    display: flex;
    gap: 0.5rem;
}

.option-btn {
    padding: 0.5rem 1rem;
    border: 2px solid #d1d5db;
    background: white;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.option-btn.active {
    border-color: #1e3a8a;
    background-color: #1e3a8a;
    color: white;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.quantity-controls {
    display: flex;
    align-items: center;
    border: 1px solid #d1d5db;
    border-radius: 5px;
}

.quantity-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: #f8fafc;
    cursor: pointer;
    font-size: 1.2rem;
}

.quantity-input {
    width: 60px;
    height: 40px;
    border: none;
    text-align: center;
    font-size: 1rem;
}

.shipping-calculator {
    margin-bottom: 2rem;
}

.shipping-input {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.shipping-input input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid #d1d5db;
    border-radius: 5px;
}

.shipping-input button {
    padding: 0.5rem 1rem;
    background-color: #6b7280;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.product-actions {
    display: flex;
    gap: 1rem;
}

.btn-add-cart {
    flex: 1;
    background-color: #3b82f6;
    color: white;
}

.btn-buy-now {
    flex: 1;
    background-color: #1e3a8a;
    color: white;
}

.product-description {
    grid-column: 1 / -1;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e5e7eb;
}

.description-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s;
}

.tab-btn.active {
    border-bottom-color: #1e3a8a;
    color: #1e3a8a;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

@media (max-width: 768px) {
    .product-details {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .product-actions {
        flex-direction: column;
    }
}

.usage-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.step {
    padding: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    text-align: center;
}

.step h4 {
    color: #1e3a8a;
    margin-bottom: 0.5rem;
}

.step p {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.4;
}