/**************************************
 * COURSE MANAGEMENT SPECIFIC STYLES
 **************************************/

/* Course Management Layout */
.course-wrap {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 60px);
  padding: 0;
}

/* Dashboard Section */
.dashboard-section {
  padding: var(--space-2xl);
  background: var(--elev);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.dashboard-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-xl);
  max-width: 1400px;
  margin: 0 auto;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.stat-card:hover::before {
  transform: scaleX(1);
}

.stat-icon {
  font-size: 36px;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  color: white;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s ease;
}

.stat-card:hover .stat-icon {
  transform: scale(1.1) rotate(5deg);
}

.stat-content {
  flex: 1;
}

.stat-number {
  font-size: 32px;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  margin-bottom: var(--space-xs);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Management Toolbar */
.management-toolbar {
  position: sticky;
  top: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background: var(--elev);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}

.tools-left, .tools-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* View Toggle */
.view-toggle {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.view-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 16px;
}

.view-btn:hover {
  background: var(--sidebar-hover);
  color: var(--text);
}

.view-btn.active {
  background: var(--primary);
  color: white;
}

/* Filter Group */
.filter-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

.filter-select {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  min-width: 140px;
  cursor: pointer;
}

.filter-select:focus {
  outline: none;
  box-shadow: var(--ring);
}

/* Course Content */
.course-content {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}

/* Course Grid View */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
}

.course-grid.list-view {
  grid-template-columns: 1fr;
  gap: 12px;
}

.course-grid.timeline-view {
  grid-template-columns: 1fr;
  gap: 16px;
}

/* Course Card */
.course-card {
  background: var(--elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.course-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.course-card:hover::before {
  transform: scaleX(1);
}

.course-card.list-view {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
}

.course-card.timeline-view {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  border-left: 4px solid var(--primary);
}

/* Course Thumbnail */
.course-thumb {
  width: 100%;
  height: 200px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--muted);
}

.course-card.list-view .course-thumb {
  width: 120px;
  height: 80px;
  border-radius: 8px;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.course-card.timeline-view .course-thumb {
  width: 80px;
  height: 60px;
  border-radius: 8px;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.course-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Course Status Badge */
.course-status {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.course-status.not-started {
  background: rgba(108, 117, 125, 0.2);
  color: #6c757d;
}

.course-status.in-progress {
  background: rgba(255, 193, 7, 0.2);
  color: #ffc107;
}

.course-status.completed {
  background: rgba(40, 167, 69, 0.2);
  color: #28a745;
}

.course-status.paused {
  background: rgba(220, 53, 69, 0.2);
  color: #dc3545;
}

/* Course Content */
.course-content-card {
  padding: 20px;
}

.course-card.list-view .course-content-card {
  padding: 0;
  flex: 1;
}

.course-card.timeline-view .course-content-card {
  padding: 0;
  flex: 1;
}

.course-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 8px 0;
  line-height: 1.3;
}

.course-title a {
  color: inherit;
  text-decoration: none;
}

.course-title a:hover {
  color: var(--primary);
}

.course-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--muted);
}

.course-category {
  background: var(--primary);
  color: white;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

.course-difficulty {
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

.course-difficulty.beginner {
  background: rgba(40, 167, 69, 0.2);
  color: #28a745;
}

.course-difficulty.intermediate {
  background: rgba(255, 193, 7, 0.2);
  color: #ffc107;
}

.course-difficulty.advanced {
  background: rgba(220, 53, 69, 0.2);
  color: #dc3545;
}

.course-description {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.course-tag {
  background: rgba(91, 157, 255, 0.1);
  color: var(--primary);
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
}

/* Course Progress */
.course-progress {
  margin-bottom: 16px;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--muted);
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* Course Actions */
.course-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.course-action {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s ease;
  flex: 1;
}

.course-action:hover {
  background: var(--sidebar-hover);
  border-color: var(--primary);
}

.course-action.primary {
  background: var(--primary);
  color: white;
  border-color: transparent;
}

.course-action.primary:hover {
  background: color-mix(in oklab, var(--primary) 85%, black);
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  color: var(--muted);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: 20px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 24px;
  margin: 0 0 12px 0;
  color: var(--text);
}

.empty-state p {
  font-size: 16px;
  margin: 0 0 24px 0;
  max-width: 400px;
}

/* Responsive Design */
@media (max-width: 1200px) {
  .dashboard-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }
  
  .course-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 900px) {
  .management-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .tools-left, .tools-right {
    justify-content: space-between;
  }
  
  .filter-group {
    flex-wrap: wrap;
    gap: 8px;
  }
  
  .filter-select {
    min-width: 120px;
  }
  
  .course-grid {
    grid-template-columns: 1fr;
  }
  
  .course-card.list-view,
  .course-card.timeline-view {
    flex-direction: column;
    align-items: stretch;
  }
  
  .course-card.list-view .course-thumb,
  .course-card.timeline-view .course-thumb {
    width: 100%;
    height: 120px;
  }
}

@media (max-width: 600px) {
  .dashboard-section {
    padding: 16px;
  }
  
  .dashboard-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .stat-card {
    padding: 16px;
    gap: 12px;
  }
  
  .stat-icon {
    width: 48px;
    height: 48px;
    font-size: 24px;
  }
  
  .stat-number {
    font-size: 20px;
  }
  
  .course-content {
    padding: 16px;
  }
  
  .course-grid {
    gap: 16px;
  }
}

/* Light Theme Adjustments */
:root.light .course-card:hover {
  box-shadow: 0 12px 32px rgba(0,0,0,.1);
}

:root.light .stat-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
}