/**
 * Session Manager Styles
 * Task 7: Enhanced session management
 * Requirements: 7.2, 7.3, 7.4, 7.5
 */

/* Session Group Styles - Task 7.1 */
.session-group {
  margin-bottom: var(--space-4, 1rem);
}

.session-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  cursor: pointer;
  user-select: none;
  border-radius: var(--radius-md, 0.5rem);
  transition: background 200ms ease;
}

.session-group-header:hover {
  background: var(--surface-hover, rgba(255, 255, 255, 0.05));
}

.session-group-header:focus {
  outline: 2px solid var(--primary, #7c3aed);
  outline-offset: 2px;
}

.group-title {
  display: flex;
  align-items: center;
  gap: var(--space-2, 0.5rem);
  font-size: var(--text-sm, 0.875rem);
  font-weight: var(--font-semibold, 600);
  color: var(--text-secondary, #94a3b8);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}

.group-title i {
  font-size: var(--text-xs, 0.75rem);
}

.session-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 var(--space-2, 0.5rem);
  background: var(--surface-elevated, rgba(255, 255, 255, 0.1));
  border-radius: var(--radius-full, 9999px);
  font-size: var(--text-xs, 0.75rem);
  font-weight: var(--font-medium, 500);
  color: var(--text-primary, #f1f5f9);
}

.group-collapse-icon {
  font-size: var(--text-sm, 0.875rem);
  color: var(--text-tertiary, #64748b);
  transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Session Group Content - Task 7.1 */
.session-group-content {
  max-height: 2000px;
  opacity: 1;
  overflow: hidden;
  transition: max-height 400ms cubic-bezier(0.4, 0, 0.2, 1),
              opacity 300ms ease;
}

.session-group.collapsed .session-group-content {
  max-height: 0;
  opacity: 0;
}

/* Session Item Styles - Task 7.3 */
.session-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3, 0.75rem);
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  margin: var(--space-1, 0.25rem) 0;
  border-radius: var(--radius-lg, 0.75rem);
  cursor: pointer;
  transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
}

.session-item:hover {
  background: var(--surface-hover, rgba(255, 255, 255, 0.05));
  border-color: var(--border, rgba(255, 255, 255, 0.1));
}

.session-item:focus {
  outline: 2px solid var(--primary, #7c3aed);
  outline-offset: 2px;
}

.session-item.active {
  background: var(--primary-gradient, linear-gradient(135deg, #7c3aed 0%, #ec4899 100%));
  border-color: transparent;
}

.session-item.active .session-title,
.session-item.active .session-preview,
.session-item.active .session-meta {
  color: white;
}

.session-item.pinned {
  border-left: 3px solid var(--accent, #f59e0b);
}

/* Session Content */
.session-content {
  flex: 1;
  min-width: 0;
}

.session-title {
  font-size: var(--text-sm, 0.875rem);
  font-weight: var(--font-semibold, 600);
  color: var(--text-primary, #f1f5f9);
  margin: 0 0 var(--space-1, 0.25rem) 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-preview {
  font-size: var(--text-xs, 0.75rem);
  color: var(--text-secondary, #94a3b8);
  margin: 0 0 var(--space-2, 0.5rem) 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2, 0.5rem);
  font-size: var(--text-xs, 0.75rem);
  color: var(--text-tertiary, #64748b);
}

.session-meta i {
  font-size: 10px;
}

.session-mode {
  padding: 2px var(--space-2, 0.5rem);
  border-radius: var(--radius-sm, 0.375rem);
  font-weight: var(--font-medium, 500);
  text-transform: capitalize;
}

.session-mode.career {
  background: rgba(6, 182, 212, 0.2);
  color: #22d3ee;
}

.session-mode.interview {
  background: rgba(124, 58, 237, 0.2);
  color: #a78bfa;
}

/* Task 7.3: Session Actions - Requirement 7.3, 7.5 */
.session-actions {
  display: flex;
  gap: var(--space-1, 0.25rem);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 200ms ease, transform 200ms ease;
}

.session-item:hover .session-actions,
.session-item:focus-within .session-actions {
  opacity: 1;
  transform: translateX(0);
}

.session-action-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--surface-elevated, rgba(255, 255, 255, 0.1));
  border-radius: var(--radius-md, 0.5rem);
  color: var(--text-secondary, #94a3b8);
  cursor: pointer;
  transition: all 200ms ease;
  font-size: var(--text-xs, 0.75rem);
}

.session-action-btn:hover {
  background: var(--surface-hover, rgba(255, 255, 255, 0.15));
  color: var(--text-primary, #f1f5f9);
  transform: scale(1.1);
}

.session-action-btn:focus {
  outline: 2px solid var(--primary, #7c3aed);
  outline-offset: 2px;
}

.session-action-delete:hover {
  background: var(--error, #ef4444);
  color: white;
}

.session-item.pinned .session-action-btn:first-child {
  color: var(--accent, #f59e0b);
}

/* Task 7.2: Search Highlighting - Requirement 7.4 */
.search-highlight {
  background: var(--accent, #f59e0b);
  color: var(--background, #0a0a0f);
  padding: 2px 4px;
  border-radius: var(--radius-sm, 0.375rem);
  font-weight: var(--font-semibold, 600);
}

/* Search Input Enhancement */
.sidebar-search {
  position: relative;
  margin-bottom: var(--space-4, 1rem);
}

.sidebar-search input {
  width: 100%;
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem) var(--space-3, 0.75rem) var(--space-10, 2.5rem);
  background: var(--surface, rgba(255, 255, 255, 0.05));
  border: 1px solid var(--border, rgba(255, 255, 255, 0.1));
  border-radius: var(--radius-lg, 0.75rem);
  color: var(--text-primary, #f1f5f9);
  font-size: var(--text-sm, 0.875rem);
  transition: all 200ms ease;
}

.sidebar-search input:focus {
  outline: none;
  border-color: var(--primary, #7c3aed);
  background: var(--surface-elevated, rgba(255, 255, 255, 0.08));
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.sidebar-search input::placeholder {
  color: var(--text-tertiary, #64748b);
}

.sidebar-search i {
  position: absolute;
  left: var(--space-4, 1rem);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary, #64748b);
  font-size: var(--text-sm, 0.875rem);
  pointer-events: none;
}

/* Filter Buttons (if added) */
.session-filters {
  display: flex;
  gap: var(--space-2, 0.5rem);
  margin-bottom: var(--space-4, 1rem);
  padding: var(--space-2, 0.5rem);
  background: var(--surface, rgba(255, 255, 255, 0.03));
  border-radius: var(--radius-lg, 0.75rem);
}

.filter-btn {
  flex: 1;
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  border: 1px solid transparent;
  background: transparent;
  border-radius: var(--radius-md, 0.5rem);
  color: var(--text-secondary, #94a3b8);
  font-size: var(--text-xs, 0.75rem);
  font-weight: var(--font-medium, 500);
  cursor: pointer;
  transition: all 200ms ease;
}

.filter-btn:hover {
  background: var(--surface-hover, rgba(255, 255, 255, 0.05));
  color: var(--text-primary, #f1f5f9);
}

.filter-btn.active {
  background: var(--primary, #7c3aed);
  color: white;
  border-color: var(--primary, #7c3aed);
}

/* Empty States */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12, 3rem) var(--space-4, 1rem);
  text-align: center;
}

.empty-state i {
  font-size: 48px;
  color: var(--text-tertiary, #64748b);
  margin-bottom: var(--space-4, 1rem);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: var(--text-lg, 1.125rem);
  font-weight: var(--font-semibold, 600);
  color: var(--text-primary, #f1f5f9);
  margin: 0 0 var(--space-2, 0.5rem) 0;
}

.empty-state p {
  font-size: var(--text-sm, 0.875rem);
  color: var(--text-secondary, #94a3b8);
  margin: 0;
}

/* Animations */
@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.session-item {
  animation: slideInFromLeft 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .session-group-header {
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  }
  
  .session-item {
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  }
  
  .session-actions {
    opacity: 1;
    transform: translateX(0);
  }
  
  .session-action-btn {
    width: 32px;
    height: 32px;
  }
}

/* Dark Mode Support */
[data-theme="light"] {
  --surface: rgba(0, 0, 0, 0.03);
  --surface-hover: rgba(0, 0, 0, 0.05);
  --surface-elevated: rgba(0, 0, 0, 0.08);
  --border: rgba(0, 0, 0, 0.1);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
}

[data-theme="light"] .session-item.active {
  background: var(--primary-gradient, linear-gradient(135deg, #7c3aed 0%, #ec4899 100%));
  color: white;
}

[data-theme="light"] .session-item.active .session-title,
[data-theme="light"] .session-item.active .session-preview,
[data-theme="light"] .session-item.active .session-meta {
  color: white;
}

[data-theme="light"] .search-highlight {
  background: var(--accent, #f59e0b);
  color: white;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .session-group-content,
  .group-collapse-icon,
  .session-item,
  .session-actions,
  .session-action-btn {
    transition: none;
  }
  
  .session-item {
    animation: none;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .session-item {
    border: 2px solid var(--border, rgba(255, 255, 255, 0.2));
  }
  
  .session-item.active {
    border: 2px solid var(--primary, #7c3aed);
  }
  
  .session-action-btn {
    border: 1px solid var(--border, rgba(255, 255, 255, 0.2));
  }
}

/* Print Styles */
@media print {
  .session-actions,
  .session-group-header,
  .sidebar-search {
    display: none;
  }
  
  .session-group-content {
    max-height: none !important;
    opacity: 1 !important;
  }
}