/**
 * Menu Navigator Styles - SSB-style progressive navigation
 */

/* ========== Header Home Link ========== */
#header-home-link {
  color: inherit;
  text-decoration: none;
}

#header-home-link:hover {
  text-decoration: underline;
}

/* ========== Front Page ========== */
.front-page {
  padding: 1rem 0;
}

.front-search-container {
  max-width: 700px;
  margin: 1rem auto 2rem auto;
  padding: 0 1rem;
}

.front-search-input {
  width: 100%;
  max-width: 700px;
  padding: 1rem 1.25rem;
  font-size: 17px;
  border: 2px solid #ddd;
  border-radius: 6px;
  transition: border-color 0.2s;
}

.front-search-input:focus {
  outline: none;
  border-color: #1a9d49;
  box-shadow: 0 0 0 3px rgba(26, 157, 73, 0.1);
}

/* Subject Grid - 6 columns for the front page */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  border: 1px solid #ddd;
  border-radius: 4px;
  overflow: hidden;
}

.subject-group-column {
  border-right: 1px solid #ddd;
  padding: 0;
}

.subject-group-column:last-child {
  border-right: none;
}

.subject-group-column-header {
  margin: 0;
  padding: 0.75rem 1rem;
  font-size: 14px;
  font-weight: 600;
  color: #333;
  background: #f5f5f5;
  border-bottom: 1px solid #ddd;
}

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

.subject-list li {
  border-bottom: 1px solid #f0f0f0;
}

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

.front-subject-link {
  display: block;
  padding: 0.75rem 1rem;
  color: #333;
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
}

.front-subject-link:hover {
  background: #e8f5ec;
  color: #1a9d49;
  padding-left: 1.25rem;
}

@media (max-width: 1100px) {
  .subject-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 600px) {
  .subject-grid {
    grid-template-columns: 1fr;
  }
  .subject-group-column {
    border-right: none;
    border-bottom: 1px solid #ddd;
  }
  .subject-group-column:last-child {
    border-bottom: none;
  }
}

/* ========== Topic & Search View wrappers ========== */
.topic-view,
.search-view {
  /* Common wrapper for non-front-page views */
}

/* Disabled options in dropdowns (for 0 hits) */
.filter-select option:disabled {
  color: #ccc;
  font-style: italic;
}

/* Search Container */
.search-container {
  padding: 0.75rem 0 0.5rem 0;
  max-width: 100%;
}

.search-input {
  width: 100%;
  max-width: 600px;
  padding: 0.6rem 0.9rem;
  font-size: 15px;
  border: 2px solid #ddd;
  border-radius: 4px;
  transition: border-color 0.2s;
  margin-bottom: 0.5rem;
}

.search-input:focus {
  outline: none;
  border-color: #1a9d49;
}

/* Search Filters */
.search-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  padding: 0.6rem 0.5rem;
  background: #f9f9f9;
  border-top: 1px solid #eee;
  border-bottom: 1px solid #eee;
  margin-bottom: 0.5rem;
}

/* Hide filters when not needed */
.search-filters.hidden {
  display: none;
}

.filter-checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}

.filter-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.filter-select {
  padding: 0.5rem 0.75rem;
  font-size: 14px;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: #fff;
  cursor: pointer;
  transition: border-color 0.2s;
}

.filter-select:hover {
  border-color: #999;
}

.filter-select:focus {
  outline: none;
  border-color: #1a9d49;
}

/* Subject Group Navigation (Dropdown Menu) */
.subject-groups {
  background: #f5f5f5;
  border-bottom: 1px solid #ddd;
  margin-bottom: 0;
}

.subject-group-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.subject-group-item {
  position: relative;
  flex: 1;
  min-width: 150px;
}

.subject-group-button {
  width: 100%;
  padding: 0.75rem 1rem;
  background: transparent;
  border: none;
  border-right: 1px solid #ddd;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: #333;
  text-align: left;
  transition: all 0.2s;
}

.subject-group-button .chevron {
  display: inline-block;
  font-size: 18px;
  margin-right: 0.5rem;
  transition: transform 0.2s;
}

.subject-group-item:hover .subject-group-button {
  background: #fff;
  color: #1a9d49;
}

.subject-group-item:hover .chevron {
  transform: rotate(90deg);
}

/* Dropdown Menu */
.subject-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: #fff;
  border: 1px solid #ddd;
  border-top: none;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  z-index: 1000;
}

.subject-group-item:hover .subject-dropdown {
  display: block;
}

.subject-link {
  display: block;
  padding: 0.75rem 1rem;
  color: #333;
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
  border-bottom: 1px solid #f0f0f0;
}

.subject-link:hover {
  background: #e8f5ec;
  color: #1a9d49;
  padding-left: 1.25rem;
}

.subject-link:last-child {
  border-bottom: none;
}

/* Breadcrumbs */
.breadcrumbs {
  padding: 1rem 0;
  font-size: 14px;
  color: #666;
}

.breadcrumb-link {
  color: #1a9d49;
  text-decoration: none;
}

.breadcrumb-link:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 0.5rem;
  color: #999;
}

/* Subject Cards (Level 1) */
.subject-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.subject-card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.subject-card:hover {
  border-color: #1a9d49;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transform: translateY(-2px);
}

.subject-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.subject-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: #333;
}

/* Subtopic Cards (Level 2) */
.subtopic-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.subtopic-card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.subtopic-card:hover {
  border-color: #1a9d49;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.subtopic-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 16px;
  font-weight: 600;
  color: #333;
  padding-right: 2rem;
}

.subtopic-card p {
  margin: 0;
  font-size: 14px;
  color: #666;
}

.card-arrow {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  color: #1a9d49;
  font-size: 20px;
  font-weight: bold;
}

/* Category Cards (Level 3) */
.category-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.category-card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.category-card:hover {
  border-color: #1a9d49;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.category-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 16px;
  font-weight: 600;
  color: #333;
  padding-right: 2rem;
}

.category-card p {
  margin: 0;
  font-size: 14px;
  color: #666;
}

/* Table Groups (Level 4) */
.table-groups {
  margin-top: 1rem;
}

.table-group {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.table-group-header {
  background: #f5f5f5;
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  user-select: none;
  list-style: none;
}

.table-group-header::-webkit-details-marker {
  display: none;
}

.expand-icon {
  display: inline-block;
  margin-right: 0.5rem;
  transition: transform 0.2s;
}

.table-group:not([open]) .expand-icon {
  transform: rotate(-90deg);
}

.table-list {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table-list thead {
  background: #fafafa;
  border-top: 1px solid #ddd;
}

.table-list th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: #666;
  border-bottom: 1px solid #ddd;
}

.table-list td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #eee;
}

.table-row:hover {
  background: #f9f9f9;
}

.table-row.discontinued {
  opacity: 0.7;
  background: #fafafa;
}

.table-link {
  color: #1a9d49;
  text-decoration: none;
}

.table-link:hover {
  text-decoration: underline;
}

/* Discontinued Badge */
.discontinued-badge {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.25rem 0.5rem;
  background: #ff9800;
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  border-radius: 3px;
  text-transform: uppercase;
  vertical-align: middle;
}

/* Responsive */
@media (max-width: 768px) {
  .subject-group-menu {
    flex-direction: column;
  }

  .subject-group-item {
    min-width: 100%;
  }

  .subject-group-button {
    border-right: none;
    border-bottom: 1px solid #ddd;
  }

  .subject-dropdown {
    position: static;
    box-shadow: none;
    border: none;
    background: #fafafa;
  }

  .subject-group-item:hover .subject-dropdown {
    display: none; /* Disable hover on mobile */
  }

  /* Make dropdowns clickable on mobile */
  .subject-group-item.active .subject-dropdown {
    display: block;
  }

  .search-container {
    padding: 1rem 0;
  }

  .search-filters {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-select {
    width: 100%;
  }

  .subject-cards,
  .subtopic-cards,
  .category-cards {
    grid-template-columns: 1fr;
  }

  .table-list {
    font-size: 13px;
  }

  .table-list th,
  .table-list td {
    padding: 0.5rem 0.75rem;
  }
}

/* Loading State */
.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  color: #666;
}

.loading-spinner::before {
  content: '';
  width: 40px;
  height: 40px;
  border: 4px solid #f0f0f0;
  border-top-color: #1a9d49;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 1rem;
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: #999;
}

.empty-state h3 {
  margin: 0 0 0.5rem 0;
  color: #666;
}

/* Page Title */
#content-area h1,
.topic-view h1,
.search-view h1 {
  margin: 1rem 0 0 0;
  font-size: 28px;
  font-weight: 700;
  color: #333;
}

/* Welcome Message */
.welcome-message {
  text-align: center;
  padding: 2rem 1.5rem;
  color: #666;
}

.welcome-message h2 {
  margin: 0 0 0.75rem 0;
  color: #333;
  font-size: 22px;
}

.welcome-message p {
  margin: 0;
  font-size: 15px;
}

/* Search Results */
.search-results {
  padding: 1rem 0;
}

.search-results h2 {
  margin: 0 0 0.5rem 0;
  font-size: 24px;
  color: #333;
}

.search-results > p {
  margin: 0 0 1.5rem 0;
  color: #666;
}

.no-results {
  text-align: center;
  padding: 3rem 2rem;
  color: #999;
}

.info-message {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: #f5f5f5;
  border-left: 3px solid #1a9d49;
  color: #666;
}

/* Nested Hierarchy Groups (Level 4+ deep navigation) */
.hierarchy-group {
  margin: 0.5rem 0 0.5rem 1rem;
  border-left: 2px solid #ddd;
}

.hierarchy-group[open] {
  border-left-color: #1a9d49;
}

.hierarchy-group-header {
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  color: #333;
  list-style: none;
  transition: color 0.2s;
}

.hierarchy-group-header::-webkit-details-marker {
  display: none;
}

.hierarchy-group-header::before {
  content: '\25B6';
  display: inline-block;
  margin-right: 0.5rem;
  font-size: 0.7em;
  transition: transform 0.2s;
}

.hierarchy-group[open] > .hierarchy-group-header::before {
  transform: rotate(90deg);
}

.hierarchy-group-header:hover {
  color: #1a9d49;
}

.hierarchy-count {
  font-weight: 400;
  font-size: 13px;
  color: #999;
  margin-left: 0.5rem;
}

.hierarchy-group-content {
  padding: 0.25rem 0;
}

/* Deeper levels get lighter border */
.hierarchy-group .hierarchy-group {
  border-left-color: #eee;
}

.hierarchy-group .hierarchy-group[open] {
  border-left-color: #a8d5b8;
}

/* Search Results - Grouped by Subject */
.search-group {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.search-group-header {
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  background: #f5f5f5;
  list-style: none;
  user-select: none;
}

.search-group-header::-webkit-details-marker {
  display: none;
}

.search-group-header::before {
  content: '\25BC';
  display: inline-block;
  margin-right: 0.5rem;
  font-size: 0.7em;
  transition: transform 0.2s;
}

.search-group:not([open]) > .search-group-header::before {
  transform: rotate(-90deg);
}

.search-group-count {
  font-weight: 400;
  font-size: 13px;
  color: #999;
  margin-left: 0.25rem;
}

/* View header buttons row */
.view-header-buttons {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}