:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gray-color: #f8f9fa;
    --transition-duration: 0.3s;
}

/* Product Image Containers */
.product-image-container {
    width: 400px;
    height: 400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-color);
    padding: 1rem;
}

.product-image {
    max-width: 400px;
    max-height: 400px;
    width: auto;
    height: auto;
    object-fit: contain;
}

/* Carousel Controls */
#productCarousel {
    max-width: 400px;
    margin: 0 auto;
}

.carousel-item {
    display: flex;
    justify-content: center;
    align-items: center;
}

.carousel-control-prev,
.carousel-control-next {
    width: 40px;
    height: 40px;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    opacity: 0.8;
    margin: 0 1rem;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    width: 20px;
    height: 20px;
}

/* Thumbnail Navigation */
.thumbnail-container {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.thumbnail-button {
    width: 60px;
    height: 60px;
    padding: 0;
    border: 2px solid transparent;
    border-radius: 4px;
    overflow: hidden;
    background: none;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.thumbnail-button.active {
    border-color: var(--primary-color);
}

.thumbnail-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: var(--light-color);
}

/* Tab Navigation */
.nav-tabs {
    border-bottom: 1px solid var(--gray-color);
}

.nav-tabs .nav-link {
    color: var(--secondary-color);
    font-weight: 600;
    border: none;
    border-bottom: 3px solid transparent;
    transition: color 0.2s ease-in-out, border-bottom-color 0.2s ease-in-out;
    padding: 0.75rem 1rem;
}

.nav-tabs .nav-link:hover,
.nav-tabs .nav-link.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .product-image-container {
        width: 100%;
        max-width: 400px;
        height: auto;
        aspect-ratio: 1;
    }

    .thumbnail-button {
        width: 50px;
        height: 50px;
    }
}

/* Price and Status Styling */
.price-special {
    color: var(--danger-color);
    font-weight: 700;
}

.price-original {
    text-decoration: line-through;
    color: var(--secondary-color);
    font-size: 0.875em;
}

.stock-status {
    padding: 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
}

/* Add to Cart Button */
.btn-add-to-cart {
    padding: 1rem 2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: transform var(--transition-duration), box-shadow var(--transition-duration);
}

.btn-add-to-cart:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, .1);
}
/* Optional carousel fade enhancement */
.carousel-fade .carousel-item {
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.carousel-fade .carousel-item.active {
    opacity: 1;
}