/**
 * TASKMATE - Knowledge Management Styles
 * ======================================
 * Sidebar + Main Layout mit Drag & Drop
 */

/* ============================================
   VIEW CONTAINER
   ============================================ */

.view-knowledge {
  padding: var(--spacing-md);
  height: calc(100vh - 120px);
  display: flex;
  flex-direction: column;
}

/* ============================================
   MAIN LAYOUT (Sidebar + Main)
   ============================================ */

.knowledge-layout {
  display: grid;
  grid-template-columns: 450px 1fr;
  gap: var(--spacing-lg);
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

/* ============================================
   SIDEBAR (Kategorien)
   ============================================ */

.knowledge-sidebar {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.knowledge-sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.knowledge-sidebar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.knowledge-category-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-xs) 0;
}

.knowledge-sidebar-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
  text-align: center;
}

.knowledge-sidebar-empty svg {
  opacity: 0.4;
  margin-bottom: var(--spacing-sm);
}

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

/* ============================================
   KATEGORIE-ITEMS (Sidebar)
   ============================================ */

.knowledge-category-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all 0.15s ease;
  user-select: none;
}

.knowledge-category-item:hover {
  background: var(--bg-hover);
}

.knowledge-category-item.active {
  border-left-color: var(--category-color, var(--primary));
  background: var(--bg-hover);
}

.knowledge-category-item.dragging {
  opacity: 0.5;
  background: var(--primary-light);
}

.knowledge-category-item.drag-over {
  border-top: 2px solid var(--primary);
}

.knowledge-category-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  width: 28px;
  text-align: center;
}

.knowledge-category-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.knowledge-category-name {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.knowledge-category-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.knowledge-category-actions {
  display: flex;
  gap: 2px;
  opacity: 0;
  transition: opacity 0.15s;
}

.knowledge-category-item:hover .knowledge-category-actions {
  opacity: 1;
}

.knowledge-category-actions .btn-icon {
  width: 24px;
  height: 24px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.knowledge-category-actions .btn-icon:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.knowledge-category-actions .btn-icon.btn-danger-hover:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

.knowledge-drag-handle {
  cursor: grab;
  opacity: 0;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 0 var(--spacing-xs);
  transition: opacity 0.15s;
}

.knowledge-category-item:hover .knowledge-drag-handle {
  opacity: 0.5;
}

.knowledge-drag-handle:hover {
  opacity: 1 !important;
}

.knowledge-drag-handle:active {
  cursor: grabbing;
}

/* ============================================
   HAUPTBEREICH (Einträge)
   ============================================ */

.knowledge-main {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.knowledge-main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-md);
  flex-shrink: 0;
}

.knowledge-main-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.knowledge-main-title .category-icon {
  font-size: 1.3rem;
}

/* ============================================
   EINTRÄGE-LISTE
   ============================================ */

.knowledge-entry-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

/* ============================================
   EINTRAG-ITEMS (Kompakt + Expand)
   ============================================ */

.knowledge-entry-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
  user-select: none;
}

.knowledge-entry-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.knowledge-entry-item.dragging {
  opacity: 0.5;
  box-shadow: var(--shadow-lg);
}

.knowledge-entry-item.drag-over {
  border-top: 2px solid var(--primary);
  margin-top: -2px;
}

.knowledge-entry-item.highlight {
  animation: highlightPulse 2s ease-in-out;
}

@keyframes highlightPulse {
  0%, 100% {
    background-color: transparent;
  }
  25%, 75% {
    background-color: var(--primary-100, rgba(59, 130, 246, 0.1));
  }
  50% {
    background-color: var(--primary-200, rgba(59, 130, 246, 0.2));
  }
}

/* Header (immer sichtbar) */
.knowledge-entry-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
}

.knowledge-entry-expand {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}

.knowledge-entry-item.expanded .knowledge-entry-expand {
  transform: rotate(90deg);
}

.knowledge-entry-title {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.knowledge-entry-indicators {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--text-muted);
  font-size: 0.8rem;
}

.knowledge-entry-indicator {
  display: flex;
  align-items: center;
  gap: 2px;
}

.knowledge-entry-actions {
  display: flex;
  gap: 2px;
  opacity: 0;
  transition: opacity 0.15s;
}

.knowledge-entry-item:hover .knowledge-entry-actions {
  opacity: 1;
}

.knowledge-entry-actions .btn-icon {
  width: 28px;
  height: 28px;
  padding: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.knowledge-entry-actions .btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.knowledge-entry-actions .btn-icon.btn-danger-hover:hover {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger);
}

.knowledge-entry-drag-handle {
  cursor: grab;
  opacity: 0;
  color: var(--text-muted);
  padding: 0 var(--spacing-xs);
  transition: opacity 0.15s;
}

.knowledge-entry-item:hover .knowledge-entry-drag-handle {
  opacity: 0.5;
}

.knowledge-entry-drag-handle:hover {
  opacity: 1 !important;
}

.knowledge-entry-drag-handle:active {
  cursor: grabbing;
}

/* Details (aufklappbar) */
.knowledge-entry-details {
  display: none;
  padding: var(--spacing-md);
  padding-top: 0;
  border-top: 1px solid var(--border-light);
  margin-top: var(--spacing-xs);
  animation: fadeIn 0.15s ease;
}

.knowledge-entry-item.expanded .knowledge-entry-details {
  display: block;
}

.knowledge-entry-url {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
  color: var(--primary);
  text-decoration: none;
  margin-bottom: var(--spacing-sm);
  word-break: break-all;
}

.knowledge-entry-url:hover {
  text-decoration: underline;
}

.knowledge-entry-url svg {
  flex-shrink: 0;
  color: var(--text-muted);
}

.knowledge-entry-notes {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: var(--spacing-sm);
  white-space: pre-wrap;
}

.knowledge-entry-attachments-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============================================
   EMPTY STATES
   ============================================ */

.knowledge-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xxl) var(--spacing-lg);
  text-align: center;
  color: var(--text-muted);
  flex: 1;
}

.knowledge-empty svg {
  margin-bottom: var(--spacing-md);
  opacity: 0.4;
}

.knowledge-empty h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 0 0 var(--spacing-xs) 0;
}

.knowledge-empty p {
  font-size: 0.95rem;
  margin: 0;
}

/* ============================================
   SUCHERGEBNISSE
   ============================================ */

.knowledge-search-results {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.knowledge-search-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-md);
}

.knowledge-search-info {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.knowledge-search-info span {
  font-weight: 500;
  color: var(--text-primary);
}

/* Kategorie-Badge in Suchergebnissen */
.knowledge-entry-category-badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--category-color, var(--primary));
  color: white;
  font-weight: 500;
}

/* ============================================
   MOBILE KATEGORIEN (Chips)
   ============================================ */

.knowledge-mobile-categories {
  display: none;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  overflow-x: auto;
  flex-shrink: 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.knowledge-mobile-categories::-webkit-scrollbar {
  display: none;
}

.knowledge-mobile-chip {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all 0.15s;
  flex-shrink: 0;
}

.knowledge-mobile-chip:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
}

.knowledge-mobile-chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.knowledge-mobile-chip .chip-icon {
  font-size: 1rem;
}

.knowledge-mobile-chip .chip-count {
  font-size: 0.75rem;
  opacity: 0.8;
}

.knowledge-mobile-add {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ============================================
   ATTACHMENTS (Modal)
   ============================================ */

.knowledge-attachments-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.knowledge-attachment-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.knowledge-attachment-item svg {
  flex-shrink: 0;
  color: var(--text-muted);
}

.knowledge-attachment-info {
  flex: 1;
  min-width: 0;
}

.knowledge-attachment-name {
  font-size: 0.9rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.knowledge-attachment-size {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.knowledge-attachment-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.knowledge-attachment-actions .btn-icon {
  width: 24px;
  height: 24px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}

.knowledge-attachment-actions .btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.knowledge-attachment-actions .btn-icon.btn-danger-hover:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

/* ============================================
   DRAG & DROP INDICATOR
   ============================================ */

.knowledge-drop-indicator {
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
  margin: var(--spacing-xs) 0;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
  .knowledge-layout {
    grid-template-columns: 450px 1fr;
  }
}

@media (max-width: 768px) {
  .view-knowledge {
    padding: var(--spacing-sm);
  }

  .knowledge-layout {
    grid-template-columns: 1fr;
  }

  .knowledge-sidebar {
    display: none;
  }

  .knowledge-mobile-categories {
    display: flex;
  }

  .knowledge-main-header {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .knowledge-main-title {
    font-size: 1.1rem;
  }

  /* Aktionen immer sichtbar auf Mobile */
  .knowledge-entry-actions,
  .knowledge-category-actions {
    opacity: 1;
  }

  .knowledge-entry-drag-handle,
  .knowledge-drag-handle {
    opacity: 0.5;
  }
}

@media (max-width: 480px) {
  .knowledge-entry-header {
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .knowledge-entry-details {
    padding: var(--spacing-sm);
  }

  .knowledge-main-header {
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
  }
}

/* ==========================================
   ICON PICKER STYLES
   ========================================== */

.icon-picker-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.icon-picker-preview {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.icon-picker-preview:hover {
  border-color: var(--primary);
  background: var(--bg-hover);
}

.icon-preview-emoji {
  font-size: 1.75rem;
  line-height: 1;
}

.icon-preview-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.icon-picker-section {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.icon-picker-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.icon-tab {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.icon-tab:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
}

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

.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: var(--spacing-xs);
  max-height: 200px;
  overflow-y: auto;
  padding: var(--spacing-xs);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-primary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 1.25rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.icon-btn:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
  transform: scale(1.1);
}

.icon-btn.selected {
  background: var(--primary-light);
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

/* Scrollbar für Icon Grid */
.icon-grid::-webkit-scrollbar {
  width: 6px;
}

.icon-grid::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

.icon-grid::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.icon-grid::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ==========================================
   SIDEBAR RESIZE HANDLE
   ========================================== */

.knowledge-resize-handle {
  position: absolute;
  top: 0;
  right: -4px;
  bottom: 0;
  width: 8px;
  cursor: col-resize;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.knowledge-resize-handle::before {
  content: '';
  width: 1px;
  height: 30px;
  background: transparent;
  border-radius: 1px;
  transition: all 0.2s ease;
}

.knowledge-resize-handle:hover::before {
  background: var(--border-color);
  width: 2px;
  height: 40px;
}

.knowledge-resize-handle.dragging::before {
  background: var(--primary);
  width: 3px;
  height: 80px;
}

.knowledge-layout.resizing {
  user-select: none;
}