* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar - Hidden */
.sidebar {
  display: none;
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.refresh-btn {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.375rem;
  transition: background-color 0.2s;
}

.refresh-btn:hover {
  background-color: var(--bg-color);
}

.outlines-list {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}

.outline-item {
  padding: 1rem;
  margin-bottom: 0.75rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.2s;
}

.outline-item:hover {
  background-color: #eff6ff;
  border-color: var(--primary-color);
}

.outline-item-title {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.outline-item-date {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.outline-item-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.outline-item-actions button {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  border: none;
  border-radius: 0.25rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.delete-btn {
  background-color: #fee2e2;
  color: var(--danger-color);
}

.delete-btn:hover {
  background-color: #fecaca;
}

.empty-state {
  text-align: center;
  color: var(--text-secondary);
  padding: 2rem 1rem;
  font-size: 0.875rem;
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.header {
  padding: 2rem;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  text-align: center;
  box-shadow: var(--shadow-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.header-content {
  flex: 1;
  text-align: center;
}

.header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.header p {
  font-size: 0.95rem;
  opacity: 0.9;
}

/* Course Grid Section */
.course-grid-section {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
  background-color: var(--bg-color);
}

.grid-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.grid-header h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin: 0;
}

.btn-large {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.course-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

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

.course-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.course-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  flex: 1;
}

.btn-pin {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
  transition: all 0.2s;
  opacity: 0.6;
}

.btn-pin:hover {
  opacity: 1;
  background-color: var(--bg-color);
}

.btn-pin.pinned {
  opacity: 1;
  color: var(--primary-color);
}

.course-card-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.course-card-modules {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  padding: 0.75rem;
  background-color: var(--bg-color);
  border-radius: 0.375rem;
  max-height: 100px;
  overflow-y: auto;
}

.course-card-modules strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.5rem;
}

.course-card-modules ul {
  list-style: none;
  margin-left: 0.5rem;
}

.course-card-modules li {
  padding: 0.25rem 0;
}

.course-card-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

.course-card-actions button {
  flex: 1;
  padding: 0.5rem;
  font-size: 0.85rem;
}

/* Setup Section */
.setup-section {
  padding: 3rem 2rem;
  text-align: center;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.course-input-group {
  max-width: 500px;
  margin: 0 auto;
}

.course-input-group label {
  display: block;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.course-input-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: 0.5rem;
  margin-bottom: 1.5rem;
  transition: border-color 0.2s;
}

.course-input-group input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-dark);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: white;
}

.btn-secondary:hover:not(:disabled) {
  background-color: #475569;
}

.btn-success {
  background-color: var(--success-color);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background-color: #059669;
}

.btn-info {
  background-color: #0891b2;
  color: white;
}

.btn-info:hover:not(:disabled) {
  background-color: #0e7490;
}

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

.btn-danger:hover:not(:disabled) {
  background-color: #dc2626;
}

.btn-tiny {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.slides-management {
  margin-bottom: 2rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Chat Section */
.chat-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.5rem;
  overflow: hidden;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.chat-header h2 {
  font-size: 1.3rem;
  flex: 1;
}

.chat-header-actions {
  display: flex;
  gap: 0.75rem;
}

.chat-container {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 1rem;
  padding: 1rem;
  background-color: var(--bg-color);
  border-radius: 0.5rem;
}

.message {
  margin-bottom: 1rem;
  display: flex;
  gap: 0.75rem;
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message.user {
  justify-content: flex-end;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.message.ai .message-avatar {
  background-color: #dbeafe;
  color: var(--primary-color);
}

.message.user .message-avatar {
  background-color: #f3e8ff;
  color: #9333ea;
}

.message-content {
  max-width: 70%;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  line-height: 1.5;
  word-wrap: break-word;
}

.message.ai .message-content {
  background-color: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.message.user .message-content {
  background-color: var(--primary-color);
  color: white;
}

.message-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* Chat Input */
.chat-input-area {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.chat-input-area input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.chat-input-area input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.chat-input-area input:disabled {
  background-color: var(--bg-color);
  cursor: not-allowed;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Outline Section */
.outline-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 2rem;
  overflow: hidden;
}

.outline-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  gap: 1.5rem;
  flex-wrap: wrap;
}

.outline-title-section {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  min-width: 300px;
}

.outline-title-section h2 {
  font-size: 1.5rem;
  margin: 0;
}

.outline-header h2 {
  font-size: 1.5rem;
}

.outline-actions {
  display: flex;
  gap: 1rem;
}

.outline-content {
  flex: 1;
  overflow-y: auto;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 2rem;
}

.outline-metadata {
  background-color: var(--bg-color);
  padding: 1.5rem;
  border-radius: 0.5rem;
  margin-bottom: 2rem;
}

.metadata-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.metadata-item {
  padding: 0.75rem;
}

.metadata-label {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.metadata-value {
  color: var(--text-primary);
  font-size: 1rem;
}

.module {
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
}

.module-header {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
}

.module-header:hover {
  background-color: var(--primary-dark);
}

.module-content {
  padding: 1.5rem;
}

.topic {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background-color: #f0f9ff;
  border-left: 4px solid var(--primary-color);
  border-radius: 0.25rem;
}

.topic-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.topic-description {
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.objectives-list {
  margin: 0.75rem 0;
  padding-left: 1.5rem;
}

.objectives-list li {
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
}

.subtopics {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background-color: white;
  border-radius: 0.25rem;
}

.subtopic {
  margin-bottom: 0.5rem;
  padding: 0.5rem;
  background-color: var(--bg-color);
  border-radius: 0.25rem;
  font-size: 0.9rem;
}

.subtopic-title {
  font-weight: 600;
  color: var(--text-primary);
}

.lab-badge {
  display: inline-block;
  background-color: var(--success-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  margin-left: 0.5rem;
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay p {
  color: white;
  margin-top: 1rem;
  font-weight: 600;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-lg);
  max-width: 300px;
  z-index: 999;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast.show {
  display: block;
}

.toast.hide {
  animation: slideOut 0.3s ease-out forwards;
}

@keyframes slideOut {
  to {
    transform: translateX(400px);
    opacity: 0;
  }
}

.toast.success {
  border-left: 4px solid var(--success-color);
  color: var(--success-color);
}

.toast.error {
  border-left: 4px solid var(--danger-color);
  color: var(--danger-color);
}

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

  .sidebar {
    width: 100%;
    height: auto;
    max-height: 200px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .main-content {
    overflow: auto;
  }

  .header {
    padding: 1.5rem 1rem;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  .setup-section {
    padding: 1.5rem 1rem;
  }

  .chat-section {
    padding: 1rem;
  }

  .message-content {
    max-width: 85%;
  }

  .outline-content {
    padding: 1rem;
  }

  .toast {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
  }
}

/* ===== Udemy Metadata Modal ===== */
.udemy-metadata-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-y: auto;
}

.metadata-modal-content {
  background-color: white;
  border-radius: 0.5rem;
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.metadata-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.metadata-modal-header h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.metadata-modal-actions {
  display: flex;
  gap: 0.5rem;
}

.metadata-tabs {
  display: flex;
  border-bottom: 2px solid var(--border-color);
  padding: 0 1rem;
  flex-shrink: 0;
  gap: 0;
}

.metadata-tab {
  background: none;
  border: none;
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--text-secondary);
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
}

.metadata-tab:hover {
  color: var(--text-primary);
}

.metadata-tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.metadata-tab-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

.metadata-tab-pane {
  display: none;
}

.metadata-tab-pane.active {
  display: block;
}

.metadata-fields {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.metadata-field {
  background-color: #f9fafb;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  padding: 1.25rem;
}

.metadata-field-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.metadata-field-label strong {
  color: var(--text-primary);
  font-size: 0.95rem;
}

.metadata-field-charcount {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.metadata-field-charcount.warning {
  color: #f59e0b;
}

.metadata-field-charcount.error {
  color: var(--danger-color);
}

.metadata-field-charcount.ok {
  color: var(--success-color);
}

.metadata-field-value {
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  padding: 0.75rem;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  max-height: 200px;
  overflow-y: auto;
  word-break: break-word;
}

.metadata-field-markdown {
  background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  padding: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  max-height: 400px;
  overflow-y: auto;
  line-height: 1.8;
  font-size: 0.95rem;
}

.metadata-field-markdown h2 {
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 0.5rem;
}

.metadata-field-markdown h3 {
  color: var(--primary-color);
}

.metadata-field-markdown h4 {
  color: var(--text-primary);
}

.metadata-field-markdown strong {
  color: var(--primary-color);
  font-weight: 700;
}

.metadata-field-markdown em {
  color: var(--text-secondary);
  font-style: italic;
}

.metadata-field-markdown ul {
  margin: 1rem 0;
  padding-left: 2rem;
}

.metadata-field-markdown li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.metadata-field-markdown p {
  margin: 0.75rem 0;
  line-height: 1.8;
}

.metadata-field-actions {
  display: flex;
  gap: 0.5rem;
}

.copy-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 0.25rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.copy-btn:hover {
  background-color: var(--primary-dark);
}

.copy-btn:active {
  background-color: #1e3a8a;
}

.metadata-sections {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.metadata-section {
  background-color: #f9fafb;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  overflow: hidden;
}

.metadata-section-header {
  background-color: #f3f4f6;
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s;
}

.metadata-section-header:hover {
  background-color: #e5e7eb;
}

.metadata-section-header strong {
  color: var(--text-primary);
}

.metadata-section-header .toggle-icon {
  transition: transform 0.2s;
}

.metadata-section-header.expanded .toggle-icon {
  transform: rotate(180deg);
}

.metadata-section-content {
  display: none;
  padding: 1.25rem;
}

.metadata-section.expanded .metadata-section-content {
  display: block;
}

.metadata-section-content .metadata-fields {
  gap: 1rem;
}

.metadata-section-content .metadata-field {
  padding: 1rem;
}

/* For list items like learning objectives, requirements */
.metadata-list {
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  padding: 0.75rem;
  margin-bottom: 0.75rem;
}

.metadata-list li {
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
}

.metadata-list li:last-child {
  margin-bottom: 0;
}

.btn-warning {
  background-color: #f59e0b;
  color: white;
}

.btn-warning:hover {
  background-color: #d97706;
}

/* ===== Module Metadata Modal ===== */
.module-metadata-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-y: auto;
}

.module-modal-content {
  background-color: white;
  border-radius: 0.5rem;
  max-width: 1000px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.module-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.module-modal-header h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--text-primary);
  flex: 1;
}

.module-modal-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.module-metadata-tabs {
  display: flex;
  border-bottom: 2px solid var(--border-color);
  padding: 0 1rem;
  flex-shrink: 0;
  gap: 0;
}

.module-metadata-tab {
  background: none;
  border: none;
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--text-secondary);
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
}

.module-metadata-tab:hover {
  color: var(--text-primary);
}

.module-metadata-tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.module-metadata-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

.module-metadata-pane {
  display: none;
}

.module-metadata-pane.active {
  display: block;
}

/* Title Options */
.title-options-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.title-option-card {
  background: linear-gradient(135deg, #f0fdf4 0%, #f1fdf6 100%);
  border: 2px solid #86efac;
  border-radius: 0.5rem;
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.3s;
}

.title-option-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
  border-color: var(--primary-color);
}

.title-option-number {
  font-size: 0.8rem;
  color: var(--success-color);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.title-option-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.title-option-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.title-option-actions {
  display: flex;
  gap: 0.5rem;
}

.title-option-actions button {
  flex: 1;
  padding: 0.5rem;
  font-size: 0.8rem;
}

/* MCQ Questions */
.mcq-question-container {
  background-color: #f9fafb;
  border-left: 4px solid var(--primary-color);
  border-radius: 0.375rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.mcq-question-number {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.mcq-question-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.mcq-options {
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  padding: 1rem;
  margin-bottom: 1rem;
}

.mcq-option {
  display: flex;
  align-items: flex-start;
  padding: 0.75rem 0;
  border-bottom: 1px solid #e5e7eb;
}

.mcq-option:last-child {
  border-bottom: none;
}

.mcq-option-key {
  font-weight: 600;
  min-width: 30px;
  color: var(--primary-color);
  margin-right: 0.75rem;
}

.mcq-option-text {
  color: var(--text-primary);
  flex: 1;
}

.mcq-correct-answer {
  background-color: #f0fdf4;
  border-left: 3px solid var(--success-color);
  padding: 0.75rem;
  margin-top: 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.9rem;
  color: var(--success-color);
  font-weight: 600;
}

.mcq-explanation {
  background-color: #eff6ff;
  border-left: 3px solid #0ea5e9;
  padding: 1rem;
  margin-top: 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.6;
}

/* Assignment */
.assignment-container {
  background-color: #f9fafb;
  border-radius: 0.5rem;
  padding: 1.5rem;
}

.assignment-section {
  margin-bottom: 1.5rem;
}

.assignment-section h3 {
  color: var(--primary-color);
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  border-bottom: 2px solid #fef3c7;
  padding-bottom: 0.5rem;
}

.assignment-section-content {
  background-color: white;
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  padding: 1rem;
  margin-bottom: 1rem;
}

.rubric-row {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr;
  gap: 1rem;
  padding: 0.75rem;
  border-bottom: 1px solid #e5e7eb;
}

.rubric-row:last-child {
  border-bottom: none;
}

.rubric-criterion {
  font-weight: 600;
  color: var(--text-primary);
}

.rubric-weight {
  background-color: #f3f4f6;
  padding: 0.5rem;
  border-radius: 0.25rem;
  text-align: center;
  color: var(--primary-color);
  font-weight: 600;
}

.rubric-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Metadata Options Container - for displaying multiple title/subtitle choices */
.metadata-options-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}

.metadata-option-card {
  background: linear-gradient(135deg, #f5f7fa 0%, #eeeeee 100%);
  border: 2px solid var(--primary-color);
  border-radius: 0.5rem;
  padding: 1.25rem;
  transition: all 0.2s ease;
  position: relative;
}

.metadata-option-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
  border-color: var(--primary-dark);
}

.metadata-option-number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.metadata-option-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.metadata-option-subtitle {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.metadata-option-hint {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.metadata-option-card .metadata-field-actions {
  display: flex;
  justify-content: flex-start;
  margin-top: 0.75rem;
}

.metadata-field-hint {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 400;
  font-style: italic;
  margin-top: 0.25rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .courses-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .courses-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
  }

  .course-grid-section {
    padding: 1rem;
  }

  .grid-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  #createNewCourseBtn {
    width: 100%;
  }

  .outline-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .outline-title-section {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
  }

  .outline-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .header {
    flex-direction: column;
    gap: 1rem;
  }

  .header-content {
    text-align: center;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  #headerBackBtn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .courses-grid {
    grid-template-columns: 1fr;
  }

  .course-card-actions {
    flex-direction: column;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  .header p {
    font-size: 0.85rem;
  }
}

/* Markdown Styles for Message Content */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
  line-height: 1.3;
}

.message-content h1 {
  font-size: 1.5rem;
  border-bottom: 2px solid currentColor;
  padding-bottom: 0.3rem;
}

.message-content h2 {
  font-size: 1.3rem;
  border-bottom: 1px solid currentColor;
  padding-bottom: 0.2rem;
}

.message-content h3 {
  font-size: 1.1rem;
}

.message-content h4 {
  font-size: 1rem;
}

.message-content h5,
.message-content h6 {
  font-size: 0.95rem;
}

.message-content p {
  margin-bottom: 0.75rem;
}

.message-content ul,
.message-content ol {
  margin-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.message-content li {
  margin-bottom: 0.3rem;
}

.message-content ul li {
  list-style-type: disc;
}

.message-content ol li {
  list-style-type: decimal;
}

.message-content strong,
.message-content b {
  font-weight: 700;
}

.message-content em,
.message-content i {
  font-style: italic;
}

.message-content code {
  background-color: rgba(0, 0, 0, 0.1);
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9em;
}

.message.user .message-content code {
  background-color: rgba(255, 255, 255, 0.2);
}

.message-content pre {
  background-color: rgba(0, 0, 0, 0.05);
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 0.75rem 0;
  border-left: 3px solid currentColor;
}

.message.user .message-content pre {
  background-color: rgba(255, 255, 255, 0.1);
}

.message-content pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  font-family: 'Courier New', Courier, monospace;
}

.message-content blockquote {
  margin-left: 0;
  padding-left: 1rem;
  border-left: 3px solid currentColor;
  color: var(--text-secondary);
  font-style: italic;
  margin: 0.75rem 0;
}

.message-content a {
  color: inherit;
  text-decoration: underline;
  cursor: pointer;
}

.message.ai .message-content a {
  color: var(--primary-color);
}

.message.user .message-content a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: underline;
}

.message-content table {
  border-collapse: collapse;
  margin: 0.75rem 0;
  width: 100%;
}

.message-content table th,
.message-content table td {
  border: 1px solid currentColor;
  padding: 0.5rem;
  text-align: left;
}

.message-content table th {
  font-weight: 600;
  background-color: rgba(0, 0, 0, 0.05);
}

.message.user .message-content table th {
  background-color: rgba(255, 255, 255, 0.1);
}

.message-content hr {
  margin: 1rem 0;
  border: none;
  border-top: 1px solid currentColor;
}

/* ===== CONTENT.TXT MODAL STYLES ===== */
.content-txt-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-y: auto;
}

.content-txt-modal-content {
  background-color: white;
  border-radius: 0.5rem;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.content-txt-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.content-txt-modal-header h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.content-txt-form {
  padding: 1.5rem;
  flex: 1;
  overflow-y: auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.radio-group,
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.radio-group label,
.checkbox-group label {
  display: flex;
  align-items: center;
  font-weight: 400;
  margin-bottom: 0;
  cursor: pointer;
}

.radio-group input[type="radio"],
.checkbox-group input[type="checkbox"] {
  margin-right: 0.5rem;
  cursor: pointer;
}

.content-txt-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.content-txt-actions .btn {
  flex: 1;
}

#contentTxtStatus {
  line-height: 1.6;
}

#contentTxtStatus code {
  background-color: rgba(0, 0, 0, 0.05);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
}

/* ===== CLIPBOARD ITERATOR MODAL STYLES ===== */
.clipboard-iterator-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-y: auto;
}

.clipboard-iterator-content {
  background-color: white;
  border-radius: 0.5rem;
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.clipboard-iterator-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.clipboard-iterator-header h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.clipboard-iterator-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.file-counter {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  background-color: rgba(59, 130, 246, 0.1);
  border-radius: 0.375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.copy-status {
  color: #10b981;
  font-weight: 600;
  animation: fadeInOut 2s ease-in-out;
}

@keyframes fadeInOut {
  0%, 100% { opacity: 0; }
  10%, 90% { opacity: 1; }
}

.file-content-display {
  flex: 1;
  overflow-y: auto;
  background-color: #f3f4f6;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  margin-bottom: 1rem;
  padding: 1rem;
}

.file-content-display pre {
  margin: 0;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-wrap: break-word;
}

.clipboard-iterator-controls {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  flex-shrink: 0;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

.clipboard-iterator-controls .btn {
  flex: 1;
}