:root {
  /* Light theme colors */
  --bg-color: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-color: #37352f;
  --text-secondary: #6b7280;
  --border-color: #e5e7eb;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #6b7280;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  --sidebar-bg: #f8f9fa;
  --sidebar-hover: #e5e7eb;
  --card-bg: #ffffff;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
  /* Dark theme colors */
  --bg-color: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --text-color: #e5e7eb;
  --text-secondary: #9ca3af;
  --border-color: #374151;
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --secondary-color: #6b7280;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  --sidebar-bg: #2d2d2d;
  --sidebar-hover: #374151;
  --card-bg: #2d2d2d;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: all 0.3s ease;
}

.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
  width: 260px;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 1000;
  transition: all 0.3s ease;
}

.sidebar-header {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.workspace-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.workspace-title i {
  color: var(--primary-color);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.875rem;
}

.user-details {
  flex: 1;
}

.user-name {
  font-size: 0.875rem;
  font-weight: 500;
  display: block;
  color: var(--text-color);
}

.user-role {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: capitalize;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0;
}

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

.section-header {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.nav-item {
  margin-bottom: 0.25rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  color: var(--text-color);
  text-decoration: none;
  transition: all 0.2s ease;
  border-radius: 0.375rem;
  margin: 0 0.5rem;
}

.nav-link:hover {
  background-color: var(--sidebar-hover);
}

.nav-link.active {
  background-color: var(--primary-color);
  color: white;
}

.nav-link i {
  font-size: 0.875rem;
  opacity: 0.8;
}

.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.5rem;
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  background-color: var(--sidebar-hover);
}

.logout-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
  margin-top: 0.5rem;
}

.logout-link:hover {
  background-color: var(--sidebar-hover);
  color: var(--error-color);
}

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

.main-content.with-sidebar {
  margin-left: 260px;
}

.main-content.no-sidebar {
  margin-left: 0;
}

/* Navbar */
.navbar {
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
}

.sidebar-toggle:hover {
  background-color: var(--bg-secondary);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.breadcrumb-item a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
}

.breadcrumb-item a:hover {
  color: var(--primary-color);
}

.breadcrumb-item.current {
  color: var(--text-color);
  font-weight: 500;
}

.breadcrumb-separator {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.search-form {
  display: flex;
  align-items: center;
  position: relative;
}

.search-input {
  padding: 0.5rem 2.5rem 0.5rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--bg-secondary);
  color: var(--text-color);
  font-size: 0.875rem;
  width: 200px;
  transition: all 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-btn {
  position: absolute;
  right: 0.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
}

.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
}

.dropdown-toggle:hover {
  background-color: var(--bg-secondary);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  z-index: 1000;
  display: none;
  padding: 0.5rem 0;
}

.dropdown-menu.show {
  display: block;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  color: var(--text-color);
  text-decoration: none;
  transition: all 0.2s ease;
}

.dropdown-item:hover {
  background-color: var(--bg-secondary);
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 0.5rem 0;
}

/* Content Wrapper */
.content-wrapper {
  padding: 2rem;
  flex: 1;
}

/* Alerts */
.alert {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Page Layout */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.page-title h1 {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-title h1 i {
  color: var(--primary-color);
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

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

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

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

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

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

.btn-danger:hover {
  background-color: #dc2626;
}

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

.btn-block {
  width: 100%;
  justify-content: center;
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* Cards */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.card-body {
  padding: 1rem;
}

.card-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

/* Pages Grid */
.pages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.page-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
  transition: all 0.2s ease;
  position: relative;
}

.page-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.page-link {
  display: block;
  padding: 1rem;
  text-decoration: none;
  color: var(--text-color);
}

.page-icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.page-info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.page-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-meta .separator {
  color: var(--border-color);
}

.page-actions {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: flex;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.page-card:hover .page-actions {
  opacity: 1;
}

/* Sections */
.section {
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title i {
  color: var(--primary-color);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.125rem;
  color: var(--text-color);
  margin-bottom: 0.5rem;
}

.empty-state p {
  margin-bottom: 1.5rem;
}

/* Auth Pages */
.auth-container,
.setup-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary);
  padding: 1rem;
}

.auth-card,
.setup-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-lg);
  padding: 2rem;
  width: 100%;
  max-width: 400px;
}

.auth-header,
.setup-header {
  text-align: center;
  margin-bottom: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.logo i {
  color: var(--primary-color);
  font-size: 2rem;
}

.logo h1 {
  color: var(--text-color);
  font-size: 1.5rem;
  font-weight: 600;
}

.auth-subtitle,
.setup-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.auth-footer,
.setup-footer {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.auth-footer p,
.setup-footer p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.auth-footer a,
.setup-footer a {
  color: var(--primary-color);
  text-decoration: none;
}

.auth-footer a:hover,
.setup-footer a:hover {
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content.with-sidebar {
    margin-left: 0;
  }
  
  .sidebar-toggle {
    display: block;
  }
  
  .pages-grid {
    grid-template-columns: 1fr;
  }
  
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .navbar-search {
    display: none;
  }
  
  .content-wrapper {
    padding: 1rem;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.grid { display: grid; }
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-4 { padding: 1rem; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }

/* Real-time Collaboration Styles */
.collaboration-cursor {
  position: absolute;
  pointer-events: none;
  z-index: 1000;
  transition: opacity 0.3s ease;
}

.cursor-line {
  width: 2px;
  height: 20px;
  position: relative;
  animation: cursor-blink 1s infinite;
}

.cursor-label {
  position: absolute;
  top: -25px;
  left: 0;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
  color: white;
}

@keyframes cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.3; }
}

.collaboration-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 10px 15px;
  border-radius: 5px;
  z-index: 10000;
  font-size: 14px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.typing-indicator {
  color: var(--text-secondary);
  font-size: 12px;
  font-style: italic;
  padding: 5px 0;
  animation: typing-pulse 1.5s infinite;
}

@keyframes typing-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.lock-indicator {
  color: var(--warning-color);
  font-size: 12px;
  font-weight: 500;
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 5px;
}

.collaborators-panel {
  position: fixed;
  top: 80px;
  right: 20px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 15px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  min-width: 200px;
}

.collaborators-header {
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-color);
  font-size: 14px;
}

.collaborator {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

.collaborator:last-child {
  border-bottom: none;
}

.collaborator-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 12px;
}

.collaborator-name {
  font-size: 13px;
  color: var(--text-color);
}

.connection-status {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 8px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  z-index: 1000;
  transition: all 0.3s ease;
}

.connection-status.connected {
  background: var(--success-color);
  color: white;
}

.connection-status.disconnected {
  background: var(--error-color);
  color: white;
}

.connection-status.error {
  background: var(--warning-color);
  color: white;
}

.collaboration-toolbar {
  position: fixed;
  top: 60px;
  right: 20px;
  display: flex;
  gap: 10px;
  z-index: 1000;
}

.collaboration-toggle {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-color);
  transition: all 0.2s ease;
}

.collaboration-toggle:hover {
  background: var(--bg-secondary);
}

.collaboration-toggle.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* Block collaboration indicators */
.block-being-edited {
  border: 2px solid var(--primary-color) !important;
  border-radius: 4px;
  position: relative;
}

.block-locked {
  opacity: 0.7;
  pointer-events: none;
}

.block-changed {
  animation: block-highlight 2s ease;
}

@keyframes block-highlight {
  0% { background-color: transparent; }
  50% { background-color: rgba(59, 130, 246, 0.1); }
  100% { background-color: transparent; }
}

/* Responsive collaboration UI */
@media (max-width: 768px) {
  .collaborators-panel {
    right: 10px;
    min-width: 180px;
  }
  
  .connection-status {
    bottom: 10px;
    right: 10px;
  }
  
  .collaboration-toolbar {
    right: 10px;
  }
}