.product-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    font-family: system-ui, -apple-system, sans-serif;
}

/* Breadcrumbs */
.breadcrumb {
    font-size: 0.85rem;
    margin-bottom: 2.5rem;
    color: #8c8c8c;
}

.crumb-link {
    cursor: pointer;
    transition: color 0.2s;
}

    .crumb-link:hover {
        color: #111;
    }

.crumb-separator {
    margin: 0 0.5rem;
}

.crumb-current {
    color: #111;
    font-weight: 500;
}

/* Two-Column Grid Layout Structure */
.product-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
}

@media (max-width: 992px) {
    .product-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

/* Left Section: Visual Images/Thumbnails Layout */
.gallery-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.main-image-wrapper {
    position: relative;
    background-color: #f9f9f9;
    border-radius: 8px;
    padding: 3rem;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 480px;
}

.main-image {
    max-height: 450px;
    object-fit: contain;
    mix-blend-mode: multiply;
}

/* Format Badges Overlay Styles */
.format-badges {
    position: absolute;
    top: 1rem;
    left: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.badge {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.35rem 0.75rem;
    border-radius: 100px;
    font-weight: 600;
    border: 1px solid transparent;
}

.badge-physical {
    background-color: #111;
    color: #fff;
}

.badge-ebook {
    background-color: #fff;
    color: #111;
    border-color: #e5e5e5;
}

.badge-online {
    background-color: #f0fdf4;
    color: #166534;
    border-color: #bbf7d0;
}

/* Thumbnails container */
.thumbnail-grid {
    display: flex;
    gap: 1rem;
}

.thumbnail-wrapper {
    width: 80px;
    height: 80px;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    padding: 0.5rem;
    cursor: pointer;
    background: #f9f9f9;
    transition: all 0.2s ease;
}

    .thumbnail-wrapper:hover, .thumbnail-wrapper.active {
        border-color: #111;
    }

    .thumbnail-wrapper img {
        width: 100%;
        height: 100%;
        object-fit: contain;
        mix-blend-mode: multiply;
    }

/* Right Section: Core Text Typography Controls */
.details-section {
    display: flex;
    flex-direction: column;
}

.meta-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.author-name {
    font-size: 1.1rem;
    color: #666;
}

/* Dynamic Stars C# rendering mapping */
.rating-stars {
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.star {
    color: #e5e5e5;
    font-size: 1.1rem;
}

    .star.filled {
        color: #111; /* Solid black stars fits your clean aesthetic perfectly */
    }

.rating-text {
    font-size: 0.85rem;
    color: #666;
    margin-left: 0.4rem;
}

.product-title {
    font-size: 2.5rem;
    font-family: 'Playfair Display', serif, Georgia; /* Fits the luxury typography tone */
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #111;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 2rem;
    color: #111;
}

/* Standard E-commerce Action Bar Block */
.purchase-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.quantity-picker {
    display: flex;
    align-items: center;
    border: 1px solid #e5e5e5;
    border-radius: 100px;
    padding: 0.25rem 0.5rem;
}

.qty-btn {
    background: none;
    border: none;
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s;
}

    .qty-btn:hover {
        background-color: #f5f5f5;
    }

.qty-val {
    min-width: 30px;
    text-align: center;
    font-weight: 500;
}

.btn-add-to-cart {
    flex-grow: 1;
    background-color: #111;
    color: #fff;
    border: none;
    border-radius: 100px;
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: background-color 0.2s;
}

    .btn-add-to-cart:hover {
        background-color: #2a2a2a;
    }

.divider {
    border: 0;
    border-top: 1px solid #eee;
    margin-bottom: 2rem;
}

/* General Layout Text and Cross-Selling */
.info-block {
    margin-bottom: 2rem;
}

    .info-block h3 {
        font-size: 0.85rem;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: #8c8c8c;
        margin-bottom: 0.75rem;
    }

.description-text, .author-bio {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #444;
}

.author-bio-card {
    background-color: #fafafa;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #f0f0f0;
}

.btn-text-link {
    background: none;
    border: none;
    padding: 0;
    margin-top: 1rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: #111;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 4px;
}

    .btn-text-link:hover {
        color: #444;
    }