/* ============================================
   Books Page Styles
   Oxford Academic Theme
   ============================================ */

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--oxford-navy) 0%, var(--academic-blue) 100%);
    color: var(--ivory-white);
    padding: 100px 0 60px;
    text-align: center;
}

.page-tag {
    display: inline-block;
    background-color: transparent;
    color: var(--heritage-gold);
    padding: 6px 20px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 1px solid var(--heritage-gold);
    border-radius: 2px;
    margin-bottom: 20px;
}

.page-title {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 500;
    color: var(--ivory-white);
    margin-bottom: 16px;
}

.page-description {
    font-size: 1.125rem;
    color: rgba(248, 246, 241, 0.8);
    max-width: 600px;
    margin: 0 auto 40px;
    font-family: var(--font-body);
    font-style: italic;
}

.book-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
}

.book-stat {
    text-align: center;
}

.book-stat .stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--heritage-gold);
    line-height: 1;
}

.book-stat .stat-label {
    display: block;
    font-size: 0.8125rem;
    color: rgba(248, 246, 241, 0.7);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Bookshelf Section */
.bookshelf-section {
    padding: 80px 0;
    background-color: var(--ivory-white);
}

.bookshelf-section.bg-light {
    background-color: var(--soft-parchment);
}

.bookshelf {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.book-item {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 50px;
    align-items: start;
}

/* 3D Book Effect */
.book-3d {
    position: relative;
    width: 220px;
    height: 320px;
    perspective: 1000px;
    margin: 0 auto;
}

.book-spine {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0) 20%, rgba(0,0,0,0.1) 100%);
    transform: rotateY(-90deg) translateZ(20px);
    transform-origin: left;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px 5px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.spine-title {
    font-family: var(--font-serif);
    font-size: 0.875rem;
    color: var(--ivory-white);
    font-weight: 500;
    letter-spacing: 1px;
}

.spine-author {
    font-size: 0.625rem;
    color: var(--heritage-gold);
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.book-cover-3d {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
}

.book-3d:hover .book-cover-3d {
    transform: rotateY(-15deg) rotateX(5deg);
}

.cover-front {
    position: absolute;
    inset: 0;
    border-radius: 2px 4px 4px 2px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 30px;
    text-align: center;
    box-shadow: 
        inset 4px 0 10px rgba(0,0,0,0.1),
        5px 5px 20px rgba(0,0,0,0.3);
}

.cover-maroon {
    background: linear-gradient(135deg, #7B1F2A 0%, #5A1620 100%);
}

.cover-gold {
    background: linear-gradient(135deg, #B68A2A 0%, #8C6A1F 100%);
}

.cover-blue {
    background: linear-gradient(135deg, #0D2B52 0%, #071B3B 100%);
}

.cover-navy {
    background: linear-gradient(135deg, #1A3A6B 0%, #0D2B52 100%);
}

.cover-bangla-1 {
    background: linear-gradient(135deg, #2E5C4F 0%, #1A3A32 100%);
}

.cover-bangla-2 {
    background: linear-gradient(135deg, #5C2E3E 0%, #3A1A26 100%);
}

.cover-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.cover-year {
    font-size: 0.75rem;
    color: var(--heritage-gold);
    letter-spacing: 2px;
    border: 1px solid var(--heritage-gold);
    padding: 4px 12px;
    border-radius: 2px;
}

.cover-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--ivory-white);
    font-weight: 500;
    line-height: 1.3;
}

.cover-title.bangla {
    font-size: 1.75rem;
}

.cover-subtitle {
    font-size: 0.9375rem;
    color: rgba(248, 246, 241, 0.8);
    font-style: italic;
}

.cover-subtitle.bangla {
    font-size: 1.125rem;
}

.cover-author {
    font-size: 0.6875rem;
    color: var(--heritage-gold);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 20px;
}

.cover-author.bangla {
    font-size: 0.8125rem;
    text-transform: none;
}

.cover-back {
    position: absolute;
    inset: 0;
    background: #f0f0f0;
    transform: translateZ(-40px);
    border-radius: 2px 4px 4px 2px;
}

.cover-pages {
    position: absolute;
    right: 0;
    top: 5px;
    bottom: 5px;
    width: 38px;
    background: linear-gradient(to right, #e8e8e8 0%, #f5f5f5 50%, #e8e8e8 100%);
    transform: rotateY(90deg) translateZ(20px);
    transform-origin: right;
    border-radius: 0 2px 2px 0;
}

/* Book Details */
.book-details {
    padding-top: 20px;
}

.book-details h3 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    color: var(--oxford-navy);
    margin-bottom: 12px;
    font-weight: 500;
}

.book-meta {
    font-size: 0.875rem;
    color: var(--heritage-gold);
    margin-bottom: 20px;
    font-weight: 500;
}

.book-desc {
    font-size: 1rem;
    color: var(--warm-gray);
    line-height: 1.8;
    margin-bottom: 24px;
}

.book-actions {
    display: flex;
    gap: 12px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(7, 27, 59, 0.9);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--ivory-white);
    border-radius: 4px;
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease;
}

.modal-large {
    max-width: 900px;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--parchment-dark);
    background-color: var(--oxford-navy);
}

.modal-header h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--ivory-white);
    font-weight: 500;
}

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--ivory-white);
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--heritage-gold);
}

.modal-body {
    padding: 32px;
    overflow-y: auto;
    max-height: calc(90vh - 80px);
}

.book-preview {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 40px;
}

.preview-cover {
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-placeholder {
    width: 200px;
    height: 280px;
    background: linear-gradient(135deg, var(--academic-blue) 0%, var(--oxford-navy) 100%);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--ivory-white);
    box-shadow: 0 10px 30px rgba(7, 27, 59, 0.3);
}

.preview-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.preview-placeholder p {
    font-size: 0.875rem;
    opacity: 0.8;
}

.preview-info h4 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--oxford-navy);
    margin-bottom: 8px;
    font-weight: 500;
}

.preview-info #previewBookMeta {
    font-size: 0.875rem;
    color: var(--heritage-gold);
    margin-bottom: 24px;
}

.preview-toc {
    background-color: var(--soft-parchment);
    padding: 24px;
    border-radius: 4px;
    margin-bottom: 24px;
}

.preview-toc h5 {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--oxford-navy);
    margin-bottom: 16px;
    font-weight: 600;
}

.preview-toc ul {
    list-style: none;
}

.preview-toc li {
    padding: 8px 0;
    border-bottom: 1px solid var(--parchment-dark);
    font-size: 0.9375rem;
    color: var(--warm-gray);
}

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

.preview-actions {
    display: flex;
    gap: 12px;
}

/* Responsive */
@media (max-width: 1024px) {
    .book-item {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .book-3d {
        margin: 0 auto;
    }
    
    .book-preview {
        grid-template-columns: 1fr;
    }
    
    .preview-cover {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }
    
    .book-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .book-details h3 {
        font-size: 1.375rem;
    }
    
    .book-actions {
        flex-direction: column;
    }
    
    .preview-actions {
        flex-direction: column;
    }
}