/* Modern Book Detail CSS for Books4Everyone */

/* Book Detail Section */
.book-detail-section {
    padding: 2rem 0;
    background: #f8fafc;
    min-height: 100vh;
}

.book-detail-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-top: 2rem;
}

/* Book Cover */
.book-cover {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid #e2e8f0;
    text-align: center;
    height: fit-content;
    position: sticky;
    top: 2rem;
}

.book-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    margin-bottom: 1.5rem;
}

.book-actions {
    margin-top: 1.5rem;
}

/* Book Info */
.book-info {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid #e2e8f0;
}

.book-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.book-author {
    font-size: 1.2rem;
    color: #718096;
    margin-bottom: 1rem;
}

.book-category {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: capitalize;
    margin-bottom: 2rem;
}

/* Book Description */
.book-description {
    margin-bottom: 2rem;
}

.book-description h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.book-description p {
    color: #4a5568;
    line-height: 1.7;
    font-size: 1rem;
}

/* Book Specifications */
.book-specifications {
    margin-bottom: 2rem;
}

.book-specifications h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1.5rem;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.spec-item {
    background: #f7fafc;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.spec-item h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #4a5568;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.spec-item p {
    color: #2d3748;
    font-weight: 500;
    font-size: 1rem;
}

/* Table of Contents */
.table-of-contents {
    margin-bottom: 2rem;
}

.table-of-contents h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.toc-list {
    background: #f7fafc;
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid #e2e8f0;
}

.toc-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e2e8f0;
    color: #4a5568;
    font-size: 0.95rem;
}

.toc-list li:last-child {
    border-bottom: none;
}

.toc-list li:hover {
    color: #667eea;
    cursor: pointer;
}

/* Introduction */
.book-introduction {
    margin-bottom: 2rem;
}

.book-introduction h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.book-introduction p {
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 1rem;
    font-size: 1rem;
}

/* Download Section */
.download-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    margin-top: 2rem;
}

.download-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.download-section p {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

/* Related Books */
.related-books {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
}

.related-books h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1.5rem;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.related-book {
    background: white;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border: 1px solid #e2e8f0;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.related-book:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    text-decoration: none;
    color: inherit;
}

.related-book img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: 0.5rem;
}

.related-book h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-book p {
    font-size: 0.8rem;
    color: #718096;
}

/* Responsive Design */
@media (max-width: 968px) {
    .book-detail-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .book-cover {
        position: static;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .book-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .book-detail-section {
        padding: 1rem 0;
    }
    
    .book-cover,
    .book-info {
        padding: 1.5rem;
    }
    
    .book-title {
        font-size: 1.8rem;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .related-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 480px) {
    .book-cover,
    .book-info {
        padding: 1rem;
    }
    
    .book-title {
        font-size: 1.5rem;
    }
    
    .book-author {
        font-size: 1rem;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
}