/* ============================================
   Writeups & Digital Library 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: 700;
    margin-bottom: 16px;
}

.page-description {
    font-size: 1.125rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 40px;
}

/* Library Controls */
.library-controls {
    max-width: 800px;
    margin: 0 auto;
}

.search-box {
    position: relative;
    margin-bottom: 24px;
}

.search-box svg {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.search-box input {
    width: 100%;
    padding: 16px 16px 16px 48px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    background-color: rgba(255,255,255,0.95);
    color: var(--black);
}

.search-box input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.5);
}

.search-box input::placeholder {
    color: var(--gray-light);
}

.filter-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background-color: transparent;
    border: 1px solid rgba(182, 138, 42, 0.4);
    border-radius: 2px;
    color: var(--ivory-white);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    background-color: rgba(182, 138, 42, 0.1);
    border-color: var(--heritage-gold);
}

.filter-btn.active {
    background-color: var(--heritage-gold);
    border-color: var(--heritage-gold);
    color: var(--oxford-navy);
}

/* Library Stats */
.library-stats {
    background-color: var(--black);
    padding: 40px 0;
}

.stats-grid {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

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

.stat-value {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1;
}

.stat-name {
    display: block;
    font-size: 0.875rem;
    color: var(--gray);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.library-stat.highlight .stat-value {
    color: var(--gold);
}

/* Content Sections */
.content-section {
    padding: 80px 0;
}

.content-section.bg-light {
    background-color: var(--off-white);
}

/* Books Grid */
.books-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.book-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 24px;
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.book-cover {
    position: relative;
}

.cover-design {
    height: 100%;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cover-maroon {
    background: linear-gradient(135deg, var(--primary-maroon) 0%, var(--primary-maroon-dark) 100%);
}

.cover-gold {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
}

.cover-charcoal {
    background: linear-gradient(135deg, var(--charcoal) 0%, var(--black) 100%);
}

.cover-maroon-light {
    background: linear-gradient(135deg, var(--primary-maroon-light) 0%, var(--primary-maroon) 100%);
}

.cover-icon {
    font-size: 4rem;
}

.book-info {
    padding: 28px 28px 28px 0;
    display: flex;
    flex-direction: column;
}

.book-year {
    display: inline-block;
    background-color: var(--primary-maroon);
    color: var(--white);
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 12px;
    width: fit-content;
}

.book-title {
    font-family: var(--font-serif);
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 8px;
    line-height: 1.3;
}

.book-publisher {
    font-size: 0.875rem;
    color: var(--gray);
    margin-bottom: 12px;
}

.book-abstract {
    font-size: 0.9375rem;
    color: var(--gray-dark);
    line-height: 1.6;
    margin-bottom: 16px;
    flex-grow: 1;
}

.book-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    padding: 4px 10px;
    background-color: var(--off-white);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--gray-dark);
}

.book-actions {
    display: flex;
    gap: 10px;
}

.book-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* Papers List */
.papers-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.paper-card {
    background-color: var(--white);
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-maroon);
    transition: all var(--transition-base);
}

.paper-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(8px);
}

.paper-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.paper-type {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary-maroon);
}

.paper-year {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray);
}

.paper-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 8px;
}

.paper-journal {
    font-size: 0.9375rem;
    color: var(--gray);
    font-style: italic;
    margin-bottom: 12px;
}

.paper-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--off-white);
}

.paper-keywords {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.keyword {
    padding: 4px 10px;
    background-color: var(--off-white);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--gray-dark);
}

.paper-actions {
    display: flex;
    gap: 8px;
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.article-card {
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.article-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.article-content {
    padding: 28px;
}

.article-date {
    display: inline-block;
    background-color: var(--gold);
    color: var(--black);
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 12px;
}

.article-content h3 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 12px;
    line-height: 1.4;
}

.article-content p {
    font-size: 0.9375rem;
    color: var(--gray);
    line-height: 1.6;
    margin-bottom: 16px;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--off-white);
}

.article-source {
    font-size: 0.8125rem;
    color: var(--gray-light);
    font-style: italic;
}

.btn-text {
    background: none;
    border: none;
    color: var(--primary-maroon);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-text:hover {
    color: var(--primary-maroon-dark);
    padding-left: 4px;
}

/* Access Statement */
.access-statement {
    background: linear-gradient(135deg, var(--off-white) 0%, var(--cream) 100%);
    padding: 80px 0;
}

.statement-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.statement-icon {
    font-size: 4rem;
    margin-bottom: 24px;
}

.statement-content h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--black);
    margin-bottom: 16px;
}

.statement-content p {
    font-size: 1.0625rem;
    color: var(--gray-dark);
    line-height: 1.7;
    margin-bottom: 40px;
}

.usage-rights {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.right-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.right-item svg {
    color: var(--primary-maroon);
}

.right-item span {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--black);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0,0,0,0.8);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--white);
    border-radius: 12px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease;
}

.modal-large .modal-content {
    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(--off-white);
}

.modal-header h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--black);
}

.reader-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.reader-btn {
    width: 36px;
    height: 36px;
    border: none;
    background-color: var(--off-white);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-dark);
    transition: all var(--transition-fast);
}

.reader-btn:hover {
    background-color: var(--primary-maroon);
    color: var(--white);
}

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

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

.modal-body {
    padding: 24px;
}

.reader-body {
    padding: 0;
    height: 600px;
}

/* Citation Modal */
.citation-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.citation-tab {
    padding: 8px 16px;
    border: 1px solid var(--silver);
    background-color: var(--white);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.citation-tab:hover {
    border-color: var(--primary-maroon);
    color: var(--primary-maroon);
}

.citation-tab.active {
    background-color: var(--primary-maroon);
    border-color: var(--primary-maroon);
    color: var(--white);
}

.citation-content textarea {
    width: 100%;
    min-height: 120px;
    padding: 16px;
    border: 1px solid var(--silver);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.6;
    resize: vertical;
    margin-bottom: 16px;
}

/* PDF Viewer */
.pdf-viewer {
    height: 100%;
    background-color: var(--off-white);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pdf-placeholder {
    text-align: center;
    padding: 40px;
}

.pdf-icon {
    font-size: 5rem;
    margin-bottom: 20px;
}

.pdf-placeholder h4 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--black);
    margin-bottom: 12px;
}

.pdf-placeholder p {
    color: var(--gray);
    margin-bottom: 8px;
}

.pdf-note {
    font-weight: 500;
    color: var(--primary-maroon) !important;
    margin-bottom: 24px !important;
}

/* Dark Mode for Reader */
.pdf-viewer.dark-mode {
    background-color: var(--black);
}

.pdf-viewer.dark-mode .pdf-placeholder h4 {
    color: var(--white);
}

.pdf-viewer.dark-mode .pdf-placeholder p {
    color: var(--gray);
}

/* No Results Message */
.no-results {
    text-align: center;
    padding: 60px 20px;
}

.no-results-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.no-results h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--black);
    margin-bottom: 8px;
}

.no-results p {
    color: var(--gray);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .books-grid {
        grid-template-columns: 1fr;
    }
    
    .book-card {
        grid-template-columns: 150px 1fr;
    }
    
    .cover-design {
        min-height: 220px;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }
    
    .page-header {
        padding: 60px 0 40px;
    }
    
    .stats-grid {
        gap: 30px;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .book-card {
        grid-template-columns: 1fr;
    }
    
    .book-cover {
        height: 200px;
    }
    
    .cover-design {
        min-height: auto;
        height: 100%;
    }
    
    .book-info {
        padding: 24px;
    }
    
    .paper-meta {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .usage-rights {
        gap: 24px;
    }
    
    .modal-content {
        margin: 10px;
    }
    
    .reader-body {
        height: 400px;
    }
}

@media (max-width: 480px) {
    .filter-buttons {
        flex-direction: column;
    }
    
    .filter-btn {
        width: 100%;
    }
    
    .book-actions {
        flex-direction: column;
    }
    
    .book-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .paper-actions {
        width: 100%;
    }
    
    .paper-actions .btn {
        flex: 1;
        justify-content: center;
    }
}

/* Print Styles */
@media print {
    .top-bar,
    .main-nav,
    .library-controls,
    .library-stats,
    .book-actions,
    .paper-actions,
    .btn-text,
    .main-footer {
        display: none !important;
    }
    
    .page-header {
        background: none;
        color: var(--black);
        padding: 20px 0;
    }
    
    .book-card,
    .paper-card,
    .article-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--silver);
    }
}