/* ----------------------------------------------------------------------------
   CSS VARIABLES
   ---------------------------------------------------------------------------- */
:root {
  /* Colors */
  --white: #ffffff;
  --black: #202124;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --red-600: #dc2626;
  --yellow-50: #fef3c7;
  --yellow-800: #92400e;
  --blue-50: #dbeafe;
  --blue-800: #1e40af;
  --purple-50: #f3e8ff;
  --purple-800: #6b21a8;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  
  /* Typography */
  --font-family: 'Nunito Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Courier New', Consolas, Monaco, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 13px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  
  /* Transitions */
  --transition-fast: 0.2s;
  
  /* Layout */
  --container-max-width: 900px;
  --input-min-height: 48px;
  --input-max-height: 200px;
  --sidebar-width: 280px;
}


/* ----------------------------------------------------------------------------
   RESET & BASE STYLES
   ---------------------------------------------------------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Visually Hidden (for accessibility) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Hidden (display: none) */
.hidden {
  display: none !important;
}

body {
  background-color: var(--white);
  color: var(--black);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  width: 100%;
}

body.chat-page {
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  height: 100vh;
}

body.landing-page {
  line-height: 1.2;
}

/* HTML5 Display Definitions */
article, aside, details, figcaption, figure, footer, header, 
hgroup, main, menu, nav, section, summary {
  display: block;
}

/* ----------------------------------------------------------------------------
   TYPOGRAPHY
   ---------------------------------------------------------------------------- */
h1 {
  text-transform: uppercase;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.2;
  display: flex;
  align-items: center;
}

h1 a {
  text-decoration: none;
  color: inherit;
}

h1 .page-subtitle {
  font-size: 0.80rem;
  font-weight: 400;
  margin-left: var(--spacing-sm);
}

p {
  text-transform: none;
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
}

a {
  color: var(--black);
}

a:active,
a:hover {
  outline: 0;
}

/* ----------------------------------------------------------------------------
   LAYOUT CONTAINERS
   ---------------------------------------------------------------------------- */
.landing-container,
.chat-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: var(--container-max-width);
  margin: 0 auto;
  width: 100%;
  background: var(--white);
}

.landing-content {
  padding: var(--spacing-xl);
  background: var(--white);
}

/* Error Message Box */
.error-message {
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-left: 4px solid var(--red-600);
  border-radius: var(--radius-md);
}

.error-message p {
  margin-bottom: var(--spacing-sm);
  color: var(--black);
}

.error-message p:last-child {
  margin-bottom: 0;
}

.error-message strong {
  color: var(--red-600);
  font-weight: 600;
}

/* ----------------------------------------------------------------------------
   HEADER COMPONENTS
   ---------------------------------------------------------------------------- */
.landing-header,
.chat-header {
  padding: var(--spacing-xl);
  background: var(--white);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logout-link {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  font-weight: 400;
  color: var(--gray-700);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.logout-link:hover {
  color: var(--black);
}

/* ----------------------------------------------------------------------------
   CHAT INTERFACE
   ---------------------------------------------------------------------------- */

/* Chat Messages Container */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-xl);
  background: var(--white);
  max-width: var(--container-max-width);
  margin: 0 auto;
  width: 100%;
}

/* Scrollbar Styling */
.chat-messages::-webkit-scrollbar {
  width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
  background: var(--gray-100);
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--gray-200);
  border-radius: var(--radius-sm);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--gray-700);
}

/* Chat Input Container */
.chat-input-container {
  padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-xl);
  background: var(--white);
  max-width: var(--container-max-width);
  margin: 0 auto;
  width: 100%;
}

.input-wrapper {
  position: relative;
  max-width: var(--container-max-width);
  margin: 0 auto;
}

/* Read-only notice for shared links */
.read-only-notice {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--spacing-lg);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  text-align: center;
}

.read-only-notice p {
  margin: 0;
  color: var(--gray-700);
  font-size: var(--font-size-base);
}

.read-only-notice a {
  color: var(--blue-600);
  text-decoration: none;
  font-weight: 500;
}

.read-only-notice a:hover {
  text-decoration: underline;
}

#msg {
  width: 100%;
  padding: var(--spacing-md) 80px var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.5;
  resize: none;
  min-height: var(--input-min-height);
  max-height: var(--input-max-height);
  transition: border-color var(--transition-fast);
  margin: 0;
  display: block;
}

#msg:focus {
  outline: none;
  border-color: var(--blue-600);
}

#send {
  position: absolute;
  right: var(--spacing-sm);
  top: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--blue-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  white-space: nowrap;
  height: 32px;
}

#send:hover:not(:disabled) {
  background: var(--blue-700);
}

#send:disabled {
  background: var(--gray-200);
  color: var(--gray-700);
  cursor: not-allowed;
}

/* ----------------------------------------------------------------------------
   FILE ATTACHMENT UI
   ---------------------------------------------------------------------------- */

/* Hidden file input */
.file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Attach button */
.attach-btn {
  position: absolute;
  left: var(--spacing-sm);
  top: var(--spacing-sm);
  width: 32px;
  height: 32px;
  padding: 6px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.attach-btn:hover {
  background: var(--gray-100);
  color: var(--blue-600);
}

.attach-btn:active {
  transform: scale(0.95);
}

/* Adjust textarea padding to make room for attach button */
#msg {
  padding-left: 44px !important;
}

/* File preview container */
.file-preview-container {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
}

.file-preview-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

/* Individual file preview */
.file-preview-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  min-width: 200px;
  max-width: 300px;
}

.file-thumbnail {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.file-thumbnail svg {
  color: var(--gray-700);
}

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

.file-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--black);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-size {
  font-size: var(--font-size-xs);
  color: var(--gray-700);
}

.file-remove-btn {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  padding: 4px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-remove-btn:hover {
  background: var(--red-600);
  color: var(--white);
}

/* Drag and drop visual feedback */
.input-wrapper.drag-over {
  position: relative;
}

.input-wrapper.drag-over::before {
  content: '';
  position: absolute;
  inset: 0;
  outline: 2px dashed var(--blue-600);
  outline-offset: -2px;
  border-radius: var(--radius-lg);
  background: var(--blue-50);
  opacity: 0.5;
  pointer-events: none;
  z-index: 1;
}

.input-wrapper.drag-over #msg {
  border-color: var(--blue-600);
}

/* ----------------------------------------------------------------------------
   MESSAGE COMPONENTS
   ---------------------------------------------------------------------------- */

/* Message Groups */
.message-group {
  margin-bottom: var(--spacing-xl);
  animation: fadeIn 0.3s ease-in;
}

.message-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  color: var(--gray-700);
}

.message-content {
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--black);
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* User Messages */
.user-message .message-content {
  background: var(--gray-50);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--blue-600);
}

/* AI Messages */
.ai-message .message-content {
  padding: var(--spacing-md) 0;
}

/* Block copying only in homework mode */
body.homework-mode .ai-message .message-content {
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

/* Message Attachments */
.message-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.message-attachment {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--gray-200);
}

.attachment-image {
  max-width: 300px;
  max-height: 300px;
  width: auto;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.attachment-image:hover {
  transform: scale(1.02);
}

.attachment-pdf {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gray-50);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--gray-700);
}

.attachment-pdf svg {
  flex-shrink: 0;
  color: var(--gray-700);
}

.attachment-pdf span {
  font-weight: 500;
}

/* Adjust spacing when attachments are present */
.user-message .message-content:has(.message-attachments) {
  padding: var(--spacing-md);
}

/* Classification Badge */
.classification-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-left: var(--spacing-sm);
  vertical-align: middle;
  background-color: var(--badge-bg);
  color: var(--badge-color);
}

.classification-badge.homework {
  --badge-bg: var(--yellow-50);
  --badge-color: var(--yellow-800);
}

.classification-badge.brainstorm {
  --badge-bg: var(--purple-50);
  --badge-color: var(--purple-800);
}

.classification-badge.other {
  --badge-bg: var(--blue-50);
  --badge-color: var(--blue-800);
}

/* Typing Indicator */
.typing-indicator {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  margin-top: var(--spacing-sm);
}

.typing-indicator span {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gray-700);
  margin: 0 2px;
  animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

/* Thread Info */
.thread-info {
  font-size: var(--font-size-xs);
  color: var(--gray-700);
  margin-top: var(--spacing-sm);
  text-align: center;
}

/* ----------------------------------------------------------------------------
   MARKDOWN CONTENT STYLES
   ---------------------------------------------------------------------------- */
.markdown-content {
  white-space: normal;
}

.markdown-content p {
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-base);
}

.markdown-content p:last-child {
  margin-bottom: 0;
}

.markdown-content strong {
  font-weight: 600;
  color: var(--black);
}

.markdown-content em {
  font-style: italic;
}

/* Inline Code */
.markdown-content code {
  background: var(--gray-100);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

/* Code Blocks */
.markdown-content pre {
  background: var(--gray-100);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
}

.markdown-content pre code {
  background: none;
  padding: 0;
}

/* Lists */
.markdown-content ul,
.markdown-content ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
}

.markdown-content li {
  margin: var(--spacing-sm) 0;
}

/* Headings */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4 {
  font-weight: 600;
  margin: var(--spacing-lg) 0 var(--spacing-sm) 0;
  text-transform: none;
}

.markdown-content h1 {
  font-size: var(--font-size-xl);
}

.markdown-content h2 {
  font-size: var(--font-size-lg);
}

.markdown-content h3 {
  font-size: var(--font-size-md);
}

.markdown-content h4 {
  font-size: var(--font-size-base);
}

/* Blockquote */
.markdown-content blockquote {
  border-left: 3px solid var(--gray-200);
  padding-left: var(--spacing-md);
  margin: var(--spacing-md) 0;
  color: var(--gray-700);
}

/* Links */
.markdown-content a {
  color: var(--blue-600);
  text-decoration: none;
}

.markdown-content a:hover {
  text-decoration: underline;
}

/* ----------------------------------------------------------------------------
   THREADS PAGE STYLES
   ---------------------------------------------------------------------------- */
.threads-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding: 0 var(--spacing-xl);
}

/* ----------------------------------------------------------------------------
   BUTTON COMPONENTS
   ---------------------------------------------------------------------------- */
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--blue-600);
  color: var(--white);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: background var(--transition-fast);
}

.btn:hover {
  background: var(--blue-700);
}

/* ----------------------------------------------------------------------------
   SIDEBAR COMPONENTS
   ---------------------------------------------------------------------------- */

/* Sidebar Toggle Button */
.sidebar-toggle {
  position: fixed;
  top: 16px;
  left: var(--spacing-lg);
  z-index: 1002;
  width: 36px;
  height: 36px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.sidebar-toggle:hover {
  background: var(--gray-50);
}

.hamburger {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--black);
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 2px;
  background: var(--black);
  left: 0;
  transition: transform var(--transition-fast);
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  bottom: -6px;
}

/* Sidebar Container */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--white);
  border-right: 1px solid var(--gray-200);
  z-index: 1001;
  transform: translateX(0);
  transition: none; /* Disable transition initially to prevent flash on page load */
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

/* Enable transitions after JS initializes */
.sidebar.transitions-enabled {
  transition: transform 0.3s ease;
}

.sidebar.collapsed {
  transform: translateX(-100%);
}


/* Sidebar Header */
.sidebar-header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--gray-200);
  background: var(--white);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.sidebar-title {
  font-size: 1rem;
  font-weight: 400;
  text-transform: uppercase;
  margin: 0;
  display: block;
  text-align: center;
}

.sidebar-title a {
  text-decoration: none;
  color: var(--black);
}

.sidebar-title a:hover {
  color: var(--black);
}

/* New Chat Button */
.new-chat-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--blue-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
  text-align: center;
  width: 100%;
  margin-top: var(--spacing-md);
}

.new-chat-btn:hover {
  background: var(--blue-700);
}

/* Sidebar Content */
.sidebar-content {
  flex: 1;
  padding: var(--spacing-xl);
}

.sidebar-section {
  margin-bottom: var(--spacing-xl);
}

.sidebar-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--gray-700);
  margin-bottom: var(--spacing-sm);
}

.thread-id-display {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  color: var(--black);
  overflow-wrap: break-word;
  word-wrap: break-word;
  padding: var(--spacing-sm);
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

/* Mode Selector */
.mode-selector {
  position: relative;
}

.mode-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition-fast);
  user-select: none;
  background-color: var(--badge-bg);
  color: var(--badge-color);
}

.mode-badge:hover {
  opacity: 0.8;
}

.mode-badge.homework {
  --badge-bg: var(--yellow-50);
  --badge-color: var(--yellow-800);
}

.mode-badge.brainstorm {
  --badge-bg: var(--purple-50);
  --badge-color: var(--purple-800);
}

.mode-badge.other {
  --badge-bg: var(--blue-50);
  --badge-color: var(--blue-800);
}

/* Mode Dropdown */
.mode-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: var(--spacing-xs);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  display: none;
  flex-direction: column;
  min-width: 150px;
  z-index: 10;
}

.mode-dropdown.show {
  display: flex;
}

.mode-option {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--white);
  border: none;
  text-align: left;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.mode-option:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.mode-option:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.mode-option:hover {
  background: var(--gray-50);
}

/* Token Usage Display */
.token-display {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.token-progress-bar {
  width: 100%;
  height: 8px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.token-progress-fill {
  height: 100%;
  background: var(--blue-600);
  border-radius: var(--radius-sm);
  transition: width 0.3s ease, background-color 0.3s ease;
  width: 0%;
}

.token-progress-fill.warning {
  background: #f59e0b; /* Yellow/Orange */
}

.token-progress-fill.critical {
  background: var(--red-600);
}

.token-stats {
  font-size: var(--font-size-sm);
  color: var(--gray-700);
  font-weight: 600;
}

/* Conversations List */
.conversations-section {
  display: flex;
  flex-direction: column;
  min-height: 0;
  flex: 1;
}

.conversations-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding-right: var(--spacing-xs);
}

.conversations-list::-webkit-scrollbar {
  width: 4px;
}

.conversations-list::-webkit-scrollbar-track {
  background: transparent;
}

.conversations-list::-webkit-scrollbar-thumb {
  background: var(--gray-200);
  border-radius: 2px;
}

.conversations-list::-webkit-scrollbar-thumb:hover {
  background: var(--gray-700);
}

.conversation-item-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.conversation-item-wrapper:hover {
  background: var(--gray-100);
}

.conversation-item-wrapper.active {
  background: var(--blue-50);
  border-left: 3px solid var(--blue-600);
}

.conversation-item {
  flex: 1;
  display: block;
  padding: var(--spacing-sm);
  text-decoration: none;
  color: var(--black);
  cursor: pointer;
  min-width: 0;
}

.conversation-menu-btn {
  flex-shrink: 0;
  background: transparent;
  border: none;
  padding: var(--spacing-sm) var(--spacing-xs);
  cursor: pointer;
  color: var(--gray-700);
  font-size: var(--font-size-lg);
  font-weight: bold;
  line-height: 1;
  transition: color var(--transition-fast), opacity var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  opacity: 0;
}

.conversation-item-wrapper:hover .conversation-menu-btn {
  opacity: 1;
}

.conversation-menu-btn:hover {
  color: var(--black);
}

.menu-dots {
  display: block;
  letter-spacing: 1px;
  line-height: 1;
  transform: translateY(-5px);
}

.conversation-menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-xs);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  display: none;
  flex-direction: column;
  min-width: 120px;
  z-index: 100;
}

.conversation-menu-dropdown.open-upward {
  top: auto;
  bottom: 100%;
  margin-top: 0;
  margin-bottom: var(--spacing-xs);
}

.conversation-menu-dropdown.show {
  display: flex;
}

.menu-item {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--white);
  border: none;
  text-align: left;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  color: var(--black);
}

.menu-item:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.menu-item:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.menu-item:only-child {
  border-radius: var(--radius-md);
}

.menu-item:hover {
  background: var(--gray-50);
}

.menu-item.delete-conversation:hover {
  background: #fef2f2;
  color: var(--red-600);
}

.conversation-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--black);
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.conversation-date {
  font-size: var(--font-size-xs);
  color: var(--gray-700);
}

.conversations-loading,
.conversations-error,
.conversations-empty {
  padding: var(--spacing-sm);
  text-align: center;
  font-size: var(--font-size-sm);
}

.conversations-loading,
.conversations-empty {
  color: var(--gray-700);
}

.conversations-error {
  color: var(--red-600);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--gray-200);
  background: var(--white);
  text-align: center;
}

.sidebar-logout {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  font-weight: 400;
  color: var(--gray-700);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: inline-block;
}

.sidebar-logout:hover {
  color: var(--black);
}

/* Sidebar Overlay (Mobile) */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar-overlay.show {
  display: block;
  opacity: 1;
}

/* Sidebar Resize Handle */
.sidebar-resize-handle {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 4px;
  background: transparent;
  cursor: ew-resize;
  z-index: 10;
  transition: background 0.2s ease;
}

.sidebar-resize-handle:hover {
  background: var(--gray-200);
}

.sidebar-resize-handle.resizing {
  background: var(--gray-700);
}

/* Disable transitions while resizing */
body.resizing .sidebar,
body.resizing .chat-main {
  transition: none !important;
}

/* Chat Main Area */
.chat-main {
  margin-left: var(--sidebar-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  transition: none; /* Disable transition initially to prevent flash on page load */
}

/* Enable transitions after JS initializes */
.chat-main.transitions-enabled {
  transition: margin-left 0.3s ease;
}

.sidebar.collapsed ~ .chat-main,
.sidebar-initially-open .sidebar.collapsed ~ .chat-main {
  margin-left: 0;
}

/* Override: Keep chat-main positioned when sidebar initially open (prevents flash) */
.sidebar-initially-open .sidebar.collapsed ~ .chat-main {
  margin-left: var(--sidebar-width);
}

/* Mobile Styles */
@media (max-width: 768px) {
  /* Hide resize handle on mobile */
  .sidebar-resize-handle {
    display: none;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  /* Hamburger button - adjust for iOS keyboard */
  .sidebar-toggle {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1002;
    /* Ensure it stays visible when keyboard opens on iOS */
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    transition: all 0.3s ease;
  }

  /* Keep hamburger visible when iOS keyboard is open */
  .sidebar-toggle.keyboard-active {
    position: absolute;
    top: 16px;
  }

  .chat-main {
    margin-left: 0;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile browsers */
  }

  .chat-messages {
    max-width: 100%;
    padding-bottom: calc(var(--input-min-height) + var(--spacing-xl) * 2 + 20px);
  }

  .chat-input-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-width: 100%;
    padding-bottom: max(var(--spacing-xl), env(safe-area-inset-bottom));
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    z-index: 100;
  }

  .input-wrapper {
    max-width: 100%;
    display: flex;
    align-items: flex-start;
  }

  #msg {
    flex: 1;
    padding-right: 70px;
  }

  #send {
    position: absolute;
    right: var(--spacing-md);
    top: var(--spacing-sm);
  }
}

/* ----------------------------------------------------------------------------
   IMAGE LIGHTBOX
   ---------------------------------------------------------------------------- */
.image-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 3000;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  padding: var(--spacing-xl);
}

.image-lightbox.show {
  display: flex;
  opacity: 1;
}

.lightbox-close {
  position: absolute;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  color: var(--white);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3001;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: scale(1.1);
}

#lightbox-image {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  animation: lightboxZoomIn 0.3s ease;
}

@keyframes lightboxZoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* ----------------------------------------------------------------------------
   MODAL DIALOG
   ---------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal-overlay.show {
  display: flex;
  opacity: 1;
}

.modal-dialog {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  max-width: 400px;
  width: 90%;
  margin: 0 var(--spacing-lg);
  animation: modalSlideIn 0.3s ease;
}

.modal-header {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-md);
  border-bottom: 1px solid var(--gray-200);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
  text-transform: none;
}

.modal-body {
  padding: var(--spacing-xl);
}

.modal-body p {
  margin-bottom: var(--spacing-md);
  color: var(--gray-700);
}

.modal-body p:last-child {
  margin-bottom: 0;
}

.modal-thread-name {
  font-weight: 600;
  color: var(--black);
  background: var(--gray-50);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-wrap: break-word;
}

.modal-footer {
  padding: var(--spacing-md) var(--spacing-xl) var(--spacing-xl);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

.modal-btn {
  padding: var(--spacing-sm) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.modal-btn-secondary {
  background: var(--gray-100);
  color: var(--black);
}

.modal-btn-secondary:hover {
  background: var(--gray-200);
}

.modal-btn-danger {
  background: var(--red-600);
  color: var(--white);
}

.modal-btn-danger:hover {
  background: #b91c1c; /* Darker red-700 */
}

@keyframes modalSlideIn {
  from {
    transform: translateY(-20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

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

@keyframes typing {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  30% {
    transform: translateY(-10px);
    opacity: 1;
  }
}

/* ----------------------------------------------------------------------------
   PRIVACY PAGE & LEGAL CONTENT
   ---------------------------------------------------------------------------- */
.privacy-container {
  max-width: 800px;
  margin: 0 auto;
}

.privacy-updated {
  color: var(--gray-700);
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-xl);
}

.privacy-h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin: var(--spacing-xl) 0 var(--spacing-md) 0;
  color: var(--black);
}

.privacy-h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 20px 0 var(--spacing-sm) 0;
  color: var(--gray-700);
}

.privacy-list {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
  line-height: 1.6;
}

.privacy-contact {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-lg);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  font-family: var(--font-mono);
}

.privacy-link {
  color: var(--blue-600);
  text-decoration: none;
}

.privacy-footer {
  margin-top: 48px;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--gray-200);
  text-align: center;
  color: var(--gray-700);
  font-size: var(--font-size-sm);
}

/* ============================================
   Classes Section
   ============================================ */

.classes-section {
  margin-bottom: var(--spacing-md);
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
}

.new-item-btn {
  background: var(--blue-600);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  width: 24px;
  height: 24px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.new-item-btn:hover {
  background: var(--blue-700);
}

.classes-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.classes-loading,
.empty-classes {
  padding: var(--spacing-sm);
  color: var(--gray-600);
  font-size: var(--text-sm);
  text-align: center;
}

/* Class Item */
.class-item {
  position: relative;
  padding: var(--spacing-sm) var(--spacing-md);
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.class-item:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
}

.class-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.class-name {
  flex: 1;
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--gray-900);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.class-count {
  padding: 2px 8px;
  background: var(--gray-200);
  color: var(--gray-700);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
}

.class-menu-btn {
  background: none;
  border: none;
  color: var(--gray-600);
  cursor: pointer;
  padding: 2px 4px;
  font-size: 16px;
  line-height: 1;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.class-item:hover .class-menu-btn {
  opacity: 1;
}

.class-menu-btn:hover {
  color: var(--gray-900);
}

.class-menu-dropdown {
  position: absolute;
  top: 100%;
  right: var(--spacing-sm);
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  z-index: 100;
  min-width: 120px;
  display: none;
}

.class-menu-dropdown .menu-item {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--gray-900);
}

.class-menu-dropdown .menu-item:hover {
  background: var(--gray-100);
}

.class-menu-dropdown .menu-item.delete-class {
  color: var(--red-600);
}

/* Unclassified Class */
.unclassified-class {
  background: var(--gray-100);
  border: 1px dashed var(--gray-400);
}

.unclassified-class:hover {
  background: var(--gray-200);
}

/* Drag and Drop States */
.drag-handle {
  padding: 8px 4px;
  color: var(--gray-400);
  cursor: grab;
  user-select: none;
  font-size: 14px;
  line-height: 1;
}

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

.conversation-item-wrapper.dragging {
  opacity: 0.5;
}

.class-drop-zone {
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs);
  border: 2px dashed var(--blue-400);
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--blue-600);
  background: var(--blue-50);
  display: none;  /* Hidden by default, shown during drag */
}

.class-item.drag-over {
  background: var(--blue-50);
  border-color: var(--blue-600);
  box-shadow: 0 0 0 2px var(--blue-100);
}

/* New Class Input */
.new-class-input-wrapper {
  padding: var(--spacing-sm);
  background: white;
  border: 2px solid var(--blue-600);
  border-radius: var(--radius-md);
}

.new-class-input {
  width: 100%;
  padding: var(--spacing-xs);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-xs);
}

.new-class-input:focus {
  outline: none;
  border-color: var(--blue-600);
}

.new-class-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.save-class-btn,
.cancel-class-btn {
  flex: 1;
  padding: var(--spacing-xs);
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.save-class-btn {
  background: var(--blue-600);
  color: white;
}

.save-class-btn:hover {
  background: var(--blue-700);
}

.cancel-class-btn {
  background: var(--gray-200);
  color: var(--gray-700);
}

.cancel-class-btn:hover {
  background: var(--gray-300);
}

.sidebar-divider {
  height: 1px;
  background: var(--gray-300);
  margin: var(--spacing-md) 0;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .class-menu-btn {
    opacity: 1;  /* Always visible on mobile */
  }

  .class-item {
    min-height: 44px;  /* Touch-friendly target */
  }

  .new-item-btn {
    min-width: 32px;
    min-height: 32px;
  }
}


/* ----------------------------------------------------------------------------
   CLASSES PAGE STYLES
   ---------------------------------------------------------------------------- */

/* Body class for classes pages */
body.classes-page,
body.class-detail-page {
  line-height: 1.4;
}

/* Classes page content container */
.classes-page-content,
.class-detail-content {
  padding: 0 var(--spacing-xl) var(--spacing-xl);
  max-width: var(--container-max-width);
  margin: 0 auto;
  width: 100%;
}

/* Page headers */
.classes-page-header,
.class-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  gap: var(--spacing-md);
}

.classes-page-header h2,
.class-detail-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  text-transform: none;
  margin: 0;
}

/* Create class button */
.create-class-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--blue-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.create-class-btn:hover {
  background: var(--blue-700);
}

/* Classes grid */
.classes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

/* Class card */
.class-card {
  display: block;
  padding: var(--spacing-lg);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.class-card:hover {
  border-color: var(--blue-600);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.class-card-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--black);
}

.class-card-description {
  font-size: var(--font-size-sm);
  color: var(--gray-700);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.class-card-meta {
  font-size: var(--font-size-xs);
  color: var(--gray-700);
}

.class-card-count {
  background: var(--gray-100);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

/* Empty state */
.classes-empty,
.threads-empty {
  text-align: center;
  padding: var(--spacing-xl) * 2;
  color: var(--gray-700);
}

.classes-empty p,
.threads-empty p {
  margin-bottom: var(--spacing-md);
}

/* New conversation button */
.new-conversation-btn {
  display: inline-block;
  margin-top: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--blue-600);
  color: var(--white);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 500;
  transition: background var(--transition-fast);
}

.new-conversation-btn:hover {
  background: var(--blue-700);
}

/* Class detail page */
.class-detail-info {
  flex: 1;
}

.class-detail-description {
  color: var(--gray-700);
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-md);
}

.class-detail-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Action buttons */
.action-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--gray-100);
  color: var(--black);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.action-btn:hover {
  background: var(--gray-200);
}

.action-btn-danger {
  background: #fef2f2;
  color: var(--red-600);
}

.action-btn-danger:hover {
  background: #fecaca;
}

/* Threads section */
.class-threads-section {
  margin-top: var(--spacing-xl);
}

.class-threads-section h3 {
  font-size: var(--font-size-md);
  font-weight: 600;
  text-transform: none;
  margin-bottom: var(--spacing-lg);
  color: var(--gray-700);
}

/* Threads list */
.threads-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.thread-item {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.thread-item:hover {
  border-color: var(--blue-600);
  background: var(--gray-50);
}

.thread-title {
  font-size: var(--font-size-md);
  font-weight: 500;
  color: var(--black);
  margin-bottom: var(--spacing-xs);
}

.thread-meta {
  font-size: var(--font-size-xs);
  color: var(--gray-700);
}

/* Form elements for modals */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--black);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--black);
  background: var(--white);
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--blue-600);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

/* Primary button for modals */
.modal-btn-primary {
  background: var(--blue-600);
  color: var(--white);
}

.modal-btn-primary:hover {
  background: var(--blue-700);
}

/* Warning text in modals */
.warning-text {
  color: var(--yellow-800);
  background: var(--yellow-50);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

/* Summary section */
.class-summary-section {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
}

.class-summary-section h3 {
  font-size: var(--font-size-md);
  font-weight: 600;
  text-transform: none;
  margin-bottom: var(--spacing-md);
  color: var(--gray-700);
}

.summary-content {
  white-space: normal;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--black);
  line-height: 1.6;
  max-height: 300px;
  overflow-y: auto;
}

/* Large textarea for summary */
.form-textarea-large {
  min-height: 200px;
}

/* Form help text */
.form-help-text {
  font-size: var(--font-size-xs);
  color: var(--gray-700);
  margin-bottom: var(--spacing-sm);
  margin-top: 0;
}

/* Mobile responsive for classes pages */
@media (max-width: 768px) {
  .classes-page-header,
  .class-detail-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .class-detail-actions {
    width: 100%;
  }

  .action-btn {
    flex: 1;
  }

  .classes-grid {
    grid-template-columns: 1fr;
  }
}