/* Library System Styles */
:root {
  --jinan-teal: #316667;
  --jinan-gold: #cd9933;
  --jinan-teal-hover: #2a5a5b;
  --jinan-gold-hover: #ba8827;
  --jinan-teal-light: rgba(49, 102, 103, 0.1);
  --jinan-gold-light: rgba(205, 153, 51, 0.1);
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --transition: all 0.3s ease;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* Library Main Container */
.library-container {
  background: #f8f9fa;
  min-height: 100vh;
  padding: 2rem 0;
}

/* Library Header */
.library-header {
  background: linear-gradient(135deg, var(--jinan-teal) 0%, #2a5a5b 100%);
  color: white;
  padding: 3rem 0;
  margin-bottom: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.library-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.library-title i {
  color: var(--jinan-gold);
  font-size: 2.8rem;
}

.library-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  margin: 0;
}

/* Search Section */
.library-search-section {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid #e9ecef;
}

.search-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.search-input-group {
  position: relative;
}

.search-input {
  width: 100%;
  padding: 1rem 1rem 1rem 3rem;
  border: 2px solid #e9ecef;
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
  background: #f8f9fa;
}

.search-input:focus {
  outline: none;
  border-color: var(--jinan-teal);
  box-shadow: 0 0 0 3px var(--jinan-teal-light);
  background: white;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--jinan-teal);
  font-size: 1.2rem;
}

.search-options {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  align-items: center;
}

.search-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.search-option input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--jinan-teal);
}

.search-option label {
  font-weight: 500;
  color: #495057;
  cursor: pointer;
  margin: 0;
}

.search-btn {
  background: var(--jinan-teal);
  color: white;
  border: none;
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 150px;
  justify-content: center;
}

.search-btn:hover {
  background: var(--jinan-teal-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* Alphabet Index */
.alphabet-section {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid #e9ecef;
}

.alphabet-header {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--jinan-teal);
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.alphabet-header:hover {
  background: var(--jinan-teal-light);
}

.alphabet-header .collapse-icon {
  margin-left: auto;
  transition: transform 0.3s ease;
  font-size: 1.2rem;
  transform: rotate(-90deg); /* Start collapsed */
}

.alphabet-header:not(.collapsed) .collapse-icon {
  transform: rotate(0deg);
}

.alphabet-content {
  transition: all 0.3s ease;
  overflow: hidden;
  max-height: 0; /* Start collapsed */
  padding: 0;
  margin: 0;
  opacity: 0;
}

.alphabet-content:not(.collapsed) {
  max-height: 1000px; /* Allow expansion */
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  opacity: 1;
}

.alphabet-divider {
  border: none;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--jinan-teal) 0%,
    var(--jinan-gold) 100%
  );
  margin: 1.5rem 0;
  border-radius: 2px;
}

.alphabet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(45px, 1fr));
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.alphabet-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1.1rem;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
}

.alphabet-letter.active {
  background: var(--jinan-teal);
  color: white;
  border-color: var(--jinan-teal);
}

.alphabet-letter.inactive {
  background: #f8f9fa;
  color: #6c757d;
  cursor: not-allowed;
}

.alphabet-letter.active:hover {
  background: var(--jinan-teal-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.alphabet-letter.arabic {
  font-family: "Arial", sans-serif;
  direction: rtl;
}

/* Categories Section */
.categories-section {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid #e9ecef;
}

.categories-header {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--jinan-teal);
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.categories-header:hover {
  background: var(--jinan-teal-light);
}

.categories-header.collapsed {
  margin-bottom: 0;
}

.categories-content {
  max-height: 900px; /* Set maximum height for scrolling */
  overflow-y: auto; /* Enable vertical scrolling */
  overflow-x: hidden; /* Hide horizontal overflow */
  transition: max-height 0.4s ease;
  border: 1px solid #d4af37;
  border-top: none;
  border-radius: 0 0 8px 8px;
  background: #fff;
  padding: 15px;
  /* Custom scrollbar styling */
  scrollbar-width: thin;
  scrollbar-color: #d4af37 #f0f0f0;
}

.categories-content::-webkit-scrollbar {
  width: 6px;
}

.categories-content::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 3px;
}

.categories-content::-webkit-scrollbar-thumb {
  background: var(--jinan-teal);
  border-radius: 3px;
}

.categories-content::-webkit-scrollbar-thumb:hover {
  background: var(--jinan-teal-hover);
}

.categories-content.collapsed {
  max-height: 0;
  padding: 0;
  margin: 0;
  opacity: 0;
}

.category-group {
  margin-bottom: 1.5rem;
  border: 1px solid #e9ecef;
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
}

.category-group:hover {
  border-color: var(--jinan-teal);
  box-shadow: 0 2px 8px rgba(49, 102, 103, 0.1);
}

.category-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--jinan-teal);
  margin: 0;
  padding: 1rem;
  background: #f8f9fa;
  border-bottom: 1px solid #e9ecef;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.category-title.collapsible-parent {
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

.category-title.collapsible-parent:hover {
  background: var(--jinan-teal-light);
  color: var(--jinan-teal-hover);
}

.category-title.collapsible-parent.collapsed {
  border-bottom: none;
}

.category-title.collapsible-parent .category-icon {
  transition: transform 0.3s ease;
  color: var(--jinan-gold);
}

.category-title.collapsible-parent .category-chevron {
  margin-left: auto;
  transition: transform 0.3s ease;
  transform: rotate(-90deg);
}

.category-title.collapsible-parent:not(.collapsed) .category-chevron {
  transform: rotate(0deg);
}

.category-title.collapsible-parent.collapsed .category-icon {
  transform: rotate(-15deg);
}

.category-title.direct-category {
  border-bottom: none;
}

.category-title.direct-category a {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  transition: var(--transition);
}

.category-title.direct-category a:hover {
  color: var(--jinan-teal-hover);
  transform: translateX(5px);
}

.category-count {
  background: var(--jinan-gold);
  color: white;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  margin-left: auto;
  min-width: 24px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.category-items {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  background: white;
}

.category-items:not(.collapsed) {
  max-height: 500px;
}

.category-item {
  border-bottom: 1px solid #f8f9fa;
}

.category-item:last-child {
  border-bottom: none;
}

.category-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: #495057;
  text-decoration: none;
  transition: var(--transition);
  font-weight: 500;
}

.category-link:hover {
  background: var(--jinan-teal-light);
  color: var(--jinan-teal);
  text-decoration: none;
  transform: translateX(5px);
}

.category-link.parent-category {
  background: #f8f9fa;
  font-weight: 600;
  color: var(--jinan-teal);
  border-bottom: 1px solid #e9ecef;
}

.category-link.parent-category:hover {
  background: var(--jinan-teal-light);
}

.category-link i {
  color: var(--jinan-gold);
  font-size: 1rem;
  width: 16px;
  text-align: center;
  transition: var(--transition);
}

.category-link:hover i {
  color: var(--jinan-gold-hover);
  transform: scale(1.1);
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: #6c757d;
}

.empty-state i {
  font-size: 3rem;
  color: #dee2e6;
  margin-bottom: 1rem;
}

.empty-state h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #495057;
}

.empty-state p {
  margin: 0;
  font-size: 0.9rem;
}

/* Books Display Section - Enhanced */
.books-section {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid #e9ecef;
  min-height: 400px;
}

.books-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.books-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--jinan-teal);
  margin: 0;
}

.books-count {
  background: var(--jinan-gold-light);
  color: var(--jinan-teal);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.9rem;
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.book-card {
  background: white;
  border: 1px solid #e9ecef;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.book-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(49, 102, 103, 0.15);
  border-color: var(--jinan-teal);
}

/* Book Cover/Thumbnail */
.book-cover {
  position: relative;
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  overflow: hidden;
}

.book-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.book-card:hover .book-cover-img {
  transform: scale(1.05);
}

.book-cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--jinan-teal-light) 0%, #e9ecef 100%);
}

.book-cover-placeholder i {
  font-size: 4rem;
  color: var(--jinan-teal);
  opacity: 0.3;
}

/* Category badge - overlaid on cover */
.book-category {
  position: absolute;
  top: 12px;
  right: 12px;
  background: linear-gradient(135deg, var(--jinan-gold) 0%, #b8941f 100%);
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Book Content Section */
.book-content {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.book-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--jinan-teal);
  margin: 0 0 0.5rem 0;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-author {
  color: #495057;
  font-size: 0.9rem;
  margin: 0 0 0.75rem 0;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.book-author i {
  color: var(--jinan-gold);
  font-size: 0.85rem;
}

.book-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  flex-grow: 1;
}

.book-meta span {
  color: #6c757d;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: #f8f9fa;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
}

.book-meta span i {
  color: var(--jinan-teal);
  font-size: 0.75rem;
}

.book-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid #f0f0f0;
}

.book-btn {
  padding: 0.65rem 1rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  justify-content: center;
}

.book-btn-primary {
  background: var(--jinan-teal);
  color: white;
}

.book-btn-primary:hover {
  background: var(--jinan-teal-hover);
  color: white;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(49, 102, 103, 0.3);
}

.book-btn-secondary {
  background: transparent;
  color: var(--jinan-gold);
  border: 2px solid var(--jinan-gold);
}

.book-btn-secondary:hover {
  background: var(--jinan-gold);
  color: white;
  text-decoration: none;
  transform: translateY(-2px);
}

/* Loading and Empty States */
.loading-state,
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: #6c757d;
}

.loading-state i,
.empty-state i {
  font-size: 3rem;
  color: var(--jinan-teal-light);
  margin-bottom: 1rem;
}

.loading-state h3,
.empty-state h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--jinan-teal);
}

.loading-state p,
.empty-state p {
  font-size: 1rem;
  margin: 0;
}

/* RTL Support */
[dir="rtl"] .search-input {
  padding: 1rem 3rem 1rem 1rem;
}

[dir="rtl"] .search-icon {
  left: auto;
  right: 1rem;
}

[dir="rtl"] .category-link {
  border-left: none;
  border-right: 3px solid transparent;
}

[dir="rtl"] .category-link:hover,
[dir="rtl"] .category-link.active {
  border-left: none;
  border-right-color: var(--jinan-teal);
}

/* Responsive Design */
@media (max-width: 768px) {
  .library-container {
    padding: 1rem 0;
  }

  .library-header {
    padding: 2rem 1rem;
    margin-bottom: 1rem;
  }

  .library-title {
    font-size: 2rem;
  }

  .library-search-section,
  .alphabet-section,
  .categories-section,
  .books-section {
    margin-left: 1rem;
    margin-right: 1rem;
    padding: 1.5rem;
  }

  .search-options {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .alphabet-grid {
    grid-template-columns: repeat(auto-fit, minmax(40px, 1fr));
  }

  .alphabet-letter {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .books-grid {
    grid-template-columns: 1fr;
  }

  .books-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .library-title {
    font-size: 1.75rem;
    flex-direction: column;
    text-align: center;
  }

  .alphabet-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .book-actions {
    flex-direction: column;
  }

  .book-btn {
    justify-content: center;
  }
}

/* Library System Modern Styles */

/* Book Details Modal */
.book-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  overflow-y: auto;
}

.book-modal.active {
  opacity: 1;
  visibility: visible;
}

.book-modal-content {
  background: white;
  border-radius: var(--border-radius-lg);
  max-width: 600px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  animation: modalSlideIn 0.3s ease;
  margin: auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

@keyframes modalSlideIn {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.book-modal-header {
  background: linear-gradient(
    135deg,
    var(--jinan-teal) 0%,
    var(--jinan-gold) 100%
  );
  color: white;
  padding: 2rem;
  position: relative;
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.book-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  font-size: 1.5rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.book-modal-close:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.book-modal-title {
  margin: 0 3rem 0.5rem 0;
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
}

.book-modal-author {
  margin: 0;
  opacity: 0.9;
  font-size: 1rem;
}

.book-modal-body {
  padding: 2rem;
}

.book-modal-section {
  margin-bottom: 2rem;
}

.book-modal-section:last-child {
  margin-bottom: 0;
}

.book-modal-section-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--jinan-teal);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.book-modal-meta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.book-modal-meta-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: #f8f9fa;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--jinan-teal);
}

.book-modal-meta-item i {
  color: var(--jinan-teal);
  width: 16px;
  flex-shrink: 0;
}

.book-modal-meta-label {
  font-weight: 600;
  color: var(--jinan-teal);
  min-width: 100px;
  flex-shrink: 0;
}

.book-modal-meta-value {
  color: #495057;
  flex-grow: 1;
}

.book-abstract {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--jinan-gold);
  color: #495057;
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Enhanced styles for HTML content in abstracts */
.book-abstract p {
  margin: 0.75rem 0;
  line-height: 1.6;
}

.book-abstract p:first-child {
  margin-top: 0;
}

.book-abstract p:last-child {
  margin-bottom: 0;
}

.book-abstract img {
  max-width: 100%;
  height: auto;
  margin: 15px 0;
  border-radius: 5px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: block;
}

.book-abstract strong {
  color: var(--jinan-teal);
  font-weight: 600;
}

.book-abstract br {
  line-height: 2;
}

/* RTL support for abstract content */
.book-abstract [dir="rtl"] {
  text-align: right;
  direction: rtl;
}

.book-abstract p[dir="rtl"] {
  text-align: right;
  margin: 15px 0;
  line-height: 1.6;
}

.book-modal-actions {
  padding: 1.5rem 2rem 2rem;
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  border-top: 1px solid #e9ecef;
}

.book-modal-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.95rem;
}

.book-modal-btn-primary {
  background: var(--jinan-teal);
  color: white;
}

.book-modal-btn-primary:hover {
  background: var(--jinan-teal-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: white;
  text-decoration: none;
}

.book-modal-btn-secondary {
  background: #6c757d;
  color: white;
}

.book-modal-btn-secondary:hover {
  background: #545b62;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* Loading state */
.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 2rem;
  color: var(--jinan-teal);
}

.loading-state i {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Mobile optimization for modal */
@media (max-width: 768px) {
  .book-modal {
    padding: 1rem;
  }

  .book-modal-content {
    max-height: 95vh;
  }

  .book-modal-header {
    padding: 1.5rem;
  }

  .book-modal-title {
    font-size: 1.3rem;
    margin-right: 2rem;
  }

  .book-modal-body {
    padding: 1.5rem;
  }

  .book-modal-actions {
    padding: 1rem 1.5rem 1.5rem;
    flex-direction: column;
  }

  .book-modal-btn {
    justify-content: center;
  }

  .book-modal-meta-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .book-modal-meta-label {
    min-width: auto;
  }
}