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.category-arrow{opacity:1;transform:translate(4px)}.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:24px}@media(max-width:768px){.books-grid{grid-template-columns:repeat(2,1fr);gap:16px}}.book-card{background:linear-gradient(135deg,#667eea1f,#764ba21a);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.3);border-radius:16px;overflow:hidden;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 12px #667eea26}.book-card:hover{transform:translateY(-8px);box-shadow:0 16px 32px #667eea4d;background:linear-gradient(135deg,#667eea33,#764ba226);border-color:#667eea66}.book-cover-vertical{width:100%;aspect-ratio:2/3;object-fit:cover}.book-details{padding:16px}.book-title-vertical{font-size:.9375rem;font-weight:600;color:#1a237e;margin:0 0 6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.3}.book-author-vertical{font-size:.8125rem;color:#7e57c2;margin:0 0 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fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media(max-width:640px){.library-container{padding:70px 16px 16px}.library-header-content{flex-direction:column;gap:12px}.library-title{font-size:1.5rem}.admin-access-btn{width:100%;justify-content:center;font-size:.85rem;padding:10px 16px}.section-header h2{font-size:1.125rem}.book-card-horizontal{flex:0 0 240px}.category-grid,.books-grid{gap:12px}}[data-theme=dark] .library-page{background:linear-gradient(135deg,#0a0e27,#0f1419,#000)}[data-theme=dark] .book-card-horizontal,[data-theme=dark] .category-card,[data-theme=dark] .book-card{background:linear-gradient(135deg,#0f143cd9,#0a0e27e6);backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);border:1px solid rgba(100,181,246,.15);box-shadow:0 8px 32px #0009}[data-theme=dark] .book-card-horizontal:hover,[data-theme=dark] 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20px}.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;flex-wrap:wrap;gap:15px}.admin-title{font-size:2rem;font-weight:700;color:#1a202c;display:flex;align-items:center;gap:12px}.admin-title svg{color:#667eea}.add-book-btn{display:flex;align-items:center;gap:8px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 24px;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 12px #667eea4d}.add-book-btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px #667eea66}.add-book-btn:active{transform:translateY(0)}.message-banner{display:flex;align-items:center;gap:12px;padding:16px 20px;border-radius:12px;margin-bottom:20px;font-weight:500;animation:slideDown .3s ease}@keyframes 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input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:#667eea}.form-actions{display:flex;justify-content:flex-end;gap:12px;padding-top:10px}.cancel-btn,.submit-btn{padding:12px 24px;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;border:none;display:flex;align-items:center;gap:8px}.cancel-btn{background:#e2e8f0;color:#4a5568}.cancel-btn:hover{background:#cbd5e0}.submit-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;box-shadow:0 4px 12px #667eea4d}.submit-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 16px #667eea66}.submit-btn:disabled{opacity:.7;cursor:not-allowed}.spinner{width:16px;height:16px;border:2px solid #ffffff;border-top:2px solid transparent;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.books-list-section{background:#fff;border-radius:16px;padding:30px;box-shadow:0 4px 20px 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#f5576c4d}@media(max-width:768px){.admin-header{flex-direction:column;align-items:flex-start}.admin-title{font-size:1.5rem}.add-book-btn{width:100%;justify-content:center}.form-grid{grid-template-columns:1fr}.form-group.full-width{grid-column:1}.checkboxes{flex-direction:column;gap:12px}.form-actions{flex-direction:column-reverse}.cancel-btn,.submit-btn{width:100%;justify-content:center}.admin-books-grid{grid-template-columns:1fr}}@media(max-width:480px){.library-admin-page{padding:70px 0}.library-admin-container{padding:0 15px}.upload-form-wrapper,.books-list-section{padding:20px}.admin-title{font-size:1.3rem}}.modal-backdrop,.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1100;padding:1rem;animation:fadeIn .2s ease}@keyframes 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1.25rem;position:sticky;top:0;background:var(--surface);z-index:1;border-top-left-radius:var(--radius-lg);border-top-right-radius:var(--radius-lg)}.modal-title{font-size:1.125rem}.modal-body{padding:1.25rem;overflow-y:visible}.modal-footer{position:sticky;bottom:0;background:var(--surface);padding:1rem 1.25rem;border-top:1px solid var(--border);margin:0;border-bottom-left-radius:var(--radius-lg);border-bottom-right-radius:var(--radius-lg);flex-direction:column;gap:.75rem}.modal-footer .btn{width:100%}}@media(min-width:769px)and (max-width:1024px){.modal-content{max-width:500px}}.rich-text-editor{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--background);overflow:hidden}.rte-toolbar{display:flex;flex-wrap:wrap;gap:var(--spacing-xs);padding:var(--spacing-sm);background:var(--surface);border-bottom:1px solid var(--border)}.rte-group{display:flex;gap:4px;padding-right:var(--spacing-xs);border-right:1px solid 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#0000001a;transform:translateY(-2px)}.submission-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-sm)}.submission-student-name{font-size:1.125rem;font-weight:600;color:var(--text-primary)}.submission-meta{display:flex;gap:var(--spacing-md);font-size:.875rem;color:var(--text-secondary);flex-wrap:wrap}.assignment-info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.info-item{background:var(--bg-secondary);padding:var(--spacing-md);border-radius:var(--radius-md)}.info-item-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}.info-item-value{font-size:1.125rem;font-weight:600;color:var(--text-primary)}.feedback-card{background:linear-gradient(135deg,#1976d20d,#1976d205);border-left:4px solid 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var(--spacing-md);border-radius:var(--radius-md);margin-bottom:var(--spacing-md);font-size:.875rem}.alert-success{background:#4caf501a;color:var(--success-green);border:1px solid rgba(76,175,80,.3)}.alert-error{background:#f443361a;color:var(--error-red);border:1px solid rgba(244,67,54,.3)}.alert-info{background:#1976d21a;color:var(--primary-color);border:1px solid rgba(25,118,210,.3)}.news-detail-card{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 2px 8px #0000001a}.news-detail-image{width:100%;background:var(--bg-secondary);display:flex;align-items:center;justify-content:center;padding:var(--spacing-md)}.news-detail-image img{max-width:100%;height:auto;max-height:500px;object-fit:contain;display:block;border-radius:var(--radius-md)}.news-detail-content{padding:var(--spacing-xl)}.news-detail-title{font-size:2rem;font-weight:700;color:var(--text-primary);margin:0 0 var(--spacing-md) 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img{max-height:300px}.news-detail-content{padding:var(--spacing-md)}.news-detail-title{font-size:1.25rem}.news-detail-meta{padding-bottom:var(--spacing-md);margin-bottom:var(--spacing-md)}.news-detail-date{font-size:.8125rem}.news-detail-body{font-size:.875rem}}@media(prefers-color-scheme:dark){.news-detail-card{box-shadow:0 2px 8px #0000004d}}.campaign-detail-card{background:var(--background);border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 2px 8px #0000001a}.campaign-detail-image{width:100%;height:auto;max-height:400px;overflow:hidden;background:var(--gray-100)}.campaign-detail-image img{width:100%;height:100%;object-fit:cover;display:block}.campaign-detail-content{padding:var(--spacing-lg)}.campaign-detail-title{font-size:1.75rem;font-weight:700;color:var(--text-primary);margin:0 0 var(--spacing-md) 0;line-height:1.3}.campaign-detail-body{font-size:1rem;line-height:1.8;color:var(--text-primary);margin-bottom:var(--spacing-lg);white-space:pre-wrap;word-wrap:break-word}.campaign-link-section{padding-top:var(--spacing-md);border-top:1px solid var(--border)}.campaign-link-section .btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-xs);width:100%;max-width:300px;font-weight:600;transition:transform .2s ease}.campaign-link-section .btn:hover{transform:translateY(-2px)}@media(max-width:768px){.campaign-detail-title{font-size:1.5rem}.campaign-detail-content{padding:var(--spacing-md)}.campaign-detail-image{max-height:300px}.campaign-link-section .btn{max-width:100%}}@media(max-width:480px){.campaign-detail-title{font-size:1.25rem}.campaign-detail-body{font-size:.9375rem}.campaign-detail-image{max-height:250px}}