/* TIMELINE MODAL */

.timeline-modal-content {
  width: min(600px, calc(100vw - 2rem));
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.timeline-modal.show .timeline-modal-content {
  transform: scale(1);
}

.timeline-modal-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.timeline-modal-body {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}

/* Left Panel */
.timeline-list-panel {
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.timeline-search-section {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.timeline-search {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--size-sm);
}

.timeline-sections {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
}

.timeline-section {
  margin-bottom: var(--space-xl);
}

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

.timeline-section-header {
  font-size: var(--size-sm);
  font-weight: 600;
  color: var(--color-gray);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.timeline-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.timeline-item {
  padding: var(--space-md);
  background: var(--color-light-gray);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
}

.timeline-item:hover {
  background: #e9ecef;
  transform: translateX(4px);
}

.timeline-item.selected {
  border-color: var(--color-primary);
  background: rgba(0, 123, 255, 0.1);
}

.timeline-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xs);
}

.timeline-item-title {
  font-weight: 500;
  color: var(--color-dark);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timeline-item-date {
  font-size: var(--size-xs);
  color: var(--color-gray);
  white-space: nowrap;
  margin-left: var(--space-sm);
}

.timeline-item-badges {
  display: flex;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
}

.timeline-badge {
  font-size: var(--size-xxs);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-weight: 500;
}

.timeline-badge.playlist {
  background: rgba(255, 193, 7, 0.2);
  color: #856404;
  border: 1px solid rgba(255, 193, 7, 0.3);
}

.timeline-badge.playlist {
  background: rgba(108, 117, 125, 0.2);
  color: #495057;
  border: 1px solid rgba(108, 117, 125, 0.3);
}

/* Right Panel */
.timeline-details-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.timeline-details-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-gray);
  text-align: center;
  padding: var(--space-xl);
}

.timeline-details-empty .empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.timeline-details-content {
  flex: 1;
  padding: var(--space-lg);
  overflow-y: auto;
}

.timeline-detail-header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.timeline-detail-title {
  font-size: var(--size-lg);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.timeline-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  color: var(--color-gray);
  font-size: var(--size-sm);
}

.timeline-detail-section {
  margin-bottom: var(--space-lg);
}

.timeline-detail-section h4 {
  font-size: var(--size-md);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.timeline-detail-actions {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  gap: var(--space-sm);
}

.timeline-action-btn {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-sm);
  font-size: var(--size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  margin: 0;
  width: auto;
}

.timeline-action-btn.primary {
  background: var(--color-primary);
  color: white;
}

.timeline-action-btn.primary:hover {
  background: #0056b3;
}

.timeline-action-btn.secondary {
  background: var(--color-light-gray);
  color: var(--color-dark);
}

.timeline-action-btn.secondary:hover {
  background: #e9ecef;
}

.timeline-action-btn.delete {
  background: var(--color-danger);
  color: white;
}

.timeline-action-btn.delete:hover {
  background: #c82333;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .timeline-modal-content {
    width: calc(100vw - 1rem);
    height: calc(100vh - 2rem);
    margin: 1rem 0.5rem;
  }
  
  .timeline-modal-body {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }
  
  .timeline-list-panel {
    border-right: none;
    border-bottom: 1px solid var(--color-border-light);
  }
}

/* Timeline Filtering */
.timeline-filters {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding: var(--space-sm);
  background: #f8fafc;
  border-radius: var(--radius-sm);
}

.timeline-filters select {
  flex: 1;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--size-sm);
}

/* Dependency Information */
.timeline-dependency-info {
  margin: var(--space-xs) 0;
  font-size: var(--size-xs);
  color: var(--color-gray);
}

.dependency-count {
  background: rgba(0, 123, 255, 0.1);
  color: var(--color-primary);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-weight: 500;
}

/* Schedule Visual Preview */
.schedule-visual-preview {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: white;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
}

.visual-preview-empty {
  text-align: center;
  color: var(--color-gray);
  font-style: italic;
  padding: var(--space-lg);
}

.schedule-timeline {
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  padding: var(--space-sm) 0;
}

.timeline-day {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.timeline-day.scheduled {
  background: rgba(0, 123, 255, 0.1);
  border: 2px solid var(--color-primary);
}

.timeline-day.not-scheduled {
  background: #f8f9fa;
  border: 2px solid #e9ecef;
  opacity: 0.6;
}

.day-header {
  font-size: var(--size-xs);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.day-indicator {
  font-size: 1.2rem;
}

/* Schedule Conflicts */
.schedule-conflicts {
  background: rgba(220, 53, 69, 0.05);
  border: 1px solid rgba(220, 53, 69, 0.2);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin: var(--space-md) 0;
}

.conflicts-header {
  font-weight: 600;
  color: var(--color-danger);
  margin-bottom: var(--space-sm);
}

.conflict-item {
  font-size: var(--size-sm);
  color: var(--color-danger);
  margin-bottom: var(--space-xs);
  padding-left: var(--space-md);
  position: relative;
}

.conflict-item::before {
  content: '•';
  position: absolute;
  left: 0;
  font-weight: bold;
}

.schedule-text-preview {
  margin-bottom: var(--space-md);
}

/* TIMELINE TAB STYLES */
.timeline-tab-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 500px;
}

.timeline-search-section {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-light-gray);
}

.timeline-tab-body {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  min-height: 400px;
}

/* Left Panel in Tab */
.timeline-tab-body .timeline-list-panel {
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.timeline-tab-body .timeline-sections {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
}

/* Right Panel in Tab */
.timeline-tab-body .timeline-details-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Timeline Filters in Tab */
.timeline-tab-content .timeline-filters {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  padding: var(--space-sm);
  background: #f8fafc;
  border-radius: var(--radius-sm);
  flex-wrap: wrap;
}

.timeline-tab-content .timeline-filters select {
  flex: 1;
  min-width: 120px;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--size-sm);
}

.timeline-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--size-sm);
  white-space: nowrap;
}

/* Mobile responsiveness for tab */
@media (max-width: 768px) {
  .timeline-tab-body {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }
  
  .timeline-tab-body .timeline-list-panel {
    border-right: none;
    border-bottom: 1px solid var(--color-border-light);
  }
  
  .timeline-tab-content .timeline-filters {
    flex-direction: column;
  }
  
  .timeline-tab-content .timeline-filters select {
    min-width: auto;
  }
}