:root {
  /* Primary palette */
  --df-primary: #2563eb;
  --df-primary-hover: #1d4ed8;
  --df-primary-light: #dbeafe;
  --df-primary-dark: #1e40af;

  /* Secondary palette */
  --df-secondary: #64748b;
  --df-secondary-hover: #475569;
  --df-secondary-light: #f1f5f9;

  /* Accent */
  --df-accent: #8b5cf6;
  --df-accent-light: #ede9fe;

  /* Semantic colors */
  --df-success: #16a34a;
  --df-warning: #d97706;
  --df-error: #dc2626;
  --df-info: #0284c7;

  /* Surface & Background */
  --df-bg: #ffffff;
  --df-bg-secondary: #f8fafc;
  --df-surface: #ffffff;
  --df-surface-raised: #ffffff;
  --df-border: #e2e8f0;
  --df-border-focus: var(--df-primary);

  /* Text */
  --df-text: #0f172a;
  --df-text-secondary: #475569;
  --df-text-muted: #94a3b8;
  --df-text-inverse: #ffffff;

  /* Editor specific */
  --df-editor-bg: #ffffff;
  --df-editor-page-shadow: 0 1px 3px rgba(0,0,0,0.12);
  --df-toolbar-bg: #f8fafc;
  --df-toolbar-border: #e2e8f0;
  --df-statusbar-bg: #f1f5f9;

  /* Collaboration user colors */
  --df-collab-1: #ef4444;
  --df-collab-2: #f97316;
  --df-collab-3: #eab308;
  --df-collab-4: #22c55e;
  --df-collab-5: #06b6d4;
  --df-collab-6: #8b5cf6;
  --df-collab-7: #ec4899;
  --df-collab-8: #14b8a6;

  /* Spacing */
  --df-space-xs: 0.25rem;
  --df-space-sm: 0.5rem;
  --df-space-md: 1rem;
  --df-space-lg: 1.5rem;
  --df-space-xl: 2rem;

  /* Border radius */
  --df-radius-sm: 0.25rem;
  --df-radius-md: 0.375rem;
  --df-radius-lg: 0.5rem;

  /* Font */
  --df-font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --df-font-mono: 'Cascadia Code', 'Fira Code', monospace;
  --df-font-size-sm: 0.875rem;
  --df-font-size-base: 1rem;
  --df-font-size-lg: 1.125rem;

  /* Transitions */
  --df-transition: 150ms ease;
}

/* Dark theme override */
[data-theme="dark"] {
  --df-bg: #0f172a;
  --df-bg-secondary: #1e293b;
  --df-surface: #1e293b;
  --df-surface-raised: #334155;
  --df-border: #334155;
  --df-text: #f1f5f9;
  --df-text-secondary: #94a3b8;
  --df-text-muted: #64748b;
  --df-editor-bg: #1e293b;
  --df-toolbar-bg: #0f172a;
  --df-toolbar-border: #334155;
  --df-statusbar-bg: #0f172a;
  --df-editor-page-shadow: 0 1px 3px rgba(0,0,0,0.4);
}

/* Base styles */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--df-font-sans);
  font-size: var(--df-font-size-base);
  color: var(--df-text);
  background-color: var(--df-bg);
  line-height: 1.5;
}

/* App Shell */
.df-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.df-header {
  display: flex;
  align-items: center;
  padding: var(--df-space-sm) var(--df-space-md);
  background: var(--df-surface);
  border-bottom: 1px solid var(--df-border);
  gap: var(--df-space-md);
  min-height: 48px;
}

.df-header-title {
  font-size: var(--df-font-size-lg);
  font-weight: 600;
  color: var(--df-primary);
}

.df-header-filename {
  font-size: var(--df-font-size-sm);
  color: var(--df-text-secondary);
}

.df-header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--df-space-sm);
}

.df-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Toolbar */
.df-toolbar {
  display: flex;
  align-items: center;
  padding: var(--df-space-xs) var(--df-space-md);
  background: var(--df-toolbar-bg);
  border-bottom: 1px solid var(--df-toolbar-border);
  gap: var(--df-space-xs);
  flex-wrap: wrap;
  min-height: 40px;
}

.df-toolbar-group {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 0 var(--df-space-xs);
  border-right: 1px solid var(--df-border);
}

.df-toolbar-group:last-child {
  border-right: none;
}

.df-toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--df-radius-sm);
  background: transparent;
  color: var(--df-text-secondary);
  cursor: pointer;
  font-size: var(--df-font-size-sm);
  transition: all var(--df-transition);
  padding: 0;
}

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

.df-toolbar-btn.active {
  background: var(--df-primary-light);
  color: var(--df-primary);
  font-weight: 600;
}

.df-toolbar-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.df-toolbar-select {
  height: 32px;
  padding: 0 var(--df-space-sm);
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius-sm);
  background: var(--df-surface);
  color: var(--df-text);
  font-size: var(--df-font-size-sm);
  cursor: pointer;
}

.df-toolbar-separator {
  width: 1px;
  height: 24px;
  background: var(--df-border);
  margin: 0 var(--df-space-xs);
}

/* Editor container */
.df-editor-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.df-editor-content {
  flex: 1;
  overflow-y: auto;
  background: var(--df-bg-secondary);
  padding: var(--df-space-xl);
}

.df-editor-page {
  max-width: 816px;
  min-height: 1056px;
  margin: 0 auto;
  padding: 96px 72px;
  background: var(--df-editor-bg);
  box-shadow: var(--df-editor-page-shadow);
  border-radius: var(--df-radius-sm);
}

/* ProseMirror editor styles */
.ProseMirror {
  outline: none;
  min-height: 200px;
  font-family: var(--df-font-sans);
  font-size: 12pt;
  line-height: 1.6;
  color: var(--df-text);
}

/* TipTap Color extension: inline color spans must not be overridden by parent color */
.ProseMirror span[style] {
  color: inherit;
  color: unset;
}

/* TipTap Highlight extension: allow inline background-color styles on <mark> */
.ProseMirror mark[style] {
  background-color: inherit;
  background-color: unset;
  border-radius: 0.15em;
  padding: 0.05em 0;
}

/* Default highlight when no inline style is present */
.ProseMirror mark {
  background-color: #fef08a;
  border-radius: 0.15em;
  padding: 0.05em 0;
}

.ProseMirror p {
  margin: 0 0 0.5em 0;
}

.ProseMirror h1 { font-size: 2em; margin: 0.67em 0; }
.ProseMirror h2 { font-size: 1.5em; margin: 0.75em 0; }
.ProseMirror h3 { font-size: 1.17em; margin: 0.83em 0; }
.ProseMirror h4 { font-size: 1em; margin: 1em 0; }

.ProseMirror ul, .ProseMirror ol {
  padding-left: 1.5em;
}

.ProseMirror table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
}

.ProseMirror td, .ProseMirror th {
  border: 1px solid var(--df-border);
  padding: var(--df-space-sm);
  min-width: 80px;
  vertical-align: top;
}

.ProseMirror th {
  background: var(--df-bg-secondary);
  font-weight: 600;
}

.ProseMirror blockquote {
  border-left: 3px solid var(--df-primary-light);
  margin: 1em 0;
  padding: var(--df-space-sm) var(--df-space-md);
  color: var(--df-text-secondary);
}

.ProseMirror code {
  font-family: var(--df-font-mono);
  background: var(--df-bg-secondary);
  padding: 0.1em 0.3em;
  border-radius: var(--df-radius-sm);
  font-size: 0.9em;
}

.ProseMirror img {
  max-width: 100%;
  height: auto;
}

.ProseMirror .image-resizer {
  position: relative;
  display: inline-block;
  line-height: 0;
}

.ProseMirror .image-resizer.selected {
  outline: 2px solid var(--df-primary);
}

.ProseMirror .resize-handle {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--df-primary);
  border: 1px solid white;
  border-radius: 50%;
  z-index: 10;
  display: none;
}

.ProseMirror .image-resizer.selected .resize-handle {
  display: block;
}

.ProseMirror .resize-handle.se { bottom: -4px; right: -4px; cursor: se-resize; }
.ProseMirror .resize-handle.sw { bottom: -4px; left: -4px; cursor: sw-resize; }
.ProseMirror .resize-handle.ne { top: -4px; right: -4px; cursor: ne-resize; }
.ProseMirror .resize-handle.nw { top: -4px; left: -4px; cursor: nw-resize; }

.ProseMirror hr {
  border: none;
  border-top: 2px solid var(--df-border);
  margin: 1.5em 0;
}

/* Collaboration cursors */
.collaboration-cursor__caret {
  position: relative;
  margin-left: -1px;
  margin-right: -1px;
  border-left: 1px solid #0d0d0d;
  border-right: 1px solid #0d0d0d;
  word-break: normal;
  pointer-events: none;
}

.collaboration-cursor__label {
  position: absolute;
  top: -1.4em;
  left: -1px;
  font-size: 12px;
  font-weight: 600;
  line-height: normal;
  white-space: nowrap;
  color: var(--df-text-inverse);
  padding: 0.1rem 0.3rem;
  border-radius: var(--df-radius-sm) var(--df-radius-sm) var(--df-radius-sm) 0;
  user-select: none;
  pointer-events: none;
}

/* Status bar */
.df-statusbar {
  display: flex;
  align-items: center;
  padding: var(--df-space-xs) var(--df-space-md);
  background: var(--df-statusbar-bg);
  border-top: 1px solid var(--df-border);
  font-size: var(--df-font-size-sm);
  color: var(--df-text-secondary);
  gap: var(--df-space-md);
  min-height: 28px;
}

.df-statusbar-item {
  display: flex;
  align-items: center;
  gap: var(--df-space-xs);
}

.df-statusbar-users {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--df-space-xs);
}

.df-user-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

/* Buttons */
.df-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--df-space-xs);
  padding: var(--df-space-xs) var(--df-space-md);
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius-md);
  background: var(--df-surface);
  color: var(--df-text);
  font-size: var(--df-font-size-sm);
  font-family: var(--df-font-sans);
  cursor: pointer;
  transition: all var(--df-transition);
  text-decoration: none;
  white-space: nowrap;
}

.df-btn:hover {
  background: var(--df-bg-secondary);
}

.df-btn-primary {
  background: var(--df-primary);
  color: var(--df-text-inverse);
  border-color: var(--df-primary);
}

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

.df-btn-sm {
  padding: 2px var(--df-space-sm);
  font-size: 0.8rem;
}

/* Dialogs */
.df-dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.df-dialog {
  background: var(--df-surface);
  border-radius: var(--df-radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  min-width: 400px;
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
}

.df-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--df-space-md) var(--df-space-lg);
  border-bottom: 1px solid var(--df-border);
}

.df-dialog-title {
  font-size: var(--df-font-size-lg);
  font-weight: 600;
}

.df-dialog-body {
  padding: var(--df-space-lg);
}

.df-dialog-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--df-space-sm);
  padding: var(--df-space-md) var(--df-space-lg);
  border-top: 1px solid var(--df-border);
}

/* File list */
.df-file-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.df-file-item {
  display: flex;
  align-items: center;
  gap: var(--df-space-md);
  padding: var(--df-space-sm) var(--df-space-md);
  border-radius: var(--df-radius-md);
  cursor: pointer;
  transition: background var(--df-transition);
}

.df-file-item:hover {
  background: var(--df-bg-secondary);
}

/* Format picker */
.df-format-picker {
  display: flex;
  flex-wrap: wrap;
  gap: var(--df-space-sm);
}

.df-format-option {
  padding: var(--df-space-sm) var(--df-space-md);
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius-md);
  cursor: pointer;
  transition: all var(--df-transition);
  text-transform: uppercase;
  font-size: var(--df-font-size-sm);
  font-weight: 600;
}

.df-format-option:hover {
  border-color: var(--df-primary);
  color: var(--df-primary);
}

.df-format-option.selected {
  background: var(--df-primary);
  color: var(--df-text-inverse);
  border-color: var(--df-primary);
}

/* Loading spinner */
.df-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--df-space-xl);
}

.df-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--df-border);
  border-top-color: var(--df-primary);
  border-radius: 50%;
  animation: df-spin 0.6s linear infinite;
}

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

/* Toast notifications */
.df-toast-container {
  position: fixed;
  top: var(--df-space-md);
  right: var(--df-space-md);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--df-space-sm);
}

.df-toast {
  padding: var(--df-space-sm) var(--df-space-md);
  border-radius: var(--df-radius-md);
  color: var(--df-text-inverse);
  font-size: var(--df-font-size-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  animation: df-slide-in 0.3s ease;
}

.df-toast-success { background: var(--df-success); }
.df-toast-error { background: var(--df-error); }
.df-toast-warning { background: var(--df-warning); }
.df-toast-info { background: var(--df-info); }

@keyframes df-slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Spreadsheet styles */
.df-spreadsheet {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.df-spreadsheet-grid {
  flex: 1;
  overflow: auto;
  position: relative;
}

.df-spreadsheet-table {
  border-collapse: collapse;
  font-size: var(--df-font-size-sm);
}

.df-spreadsheet-table th,
.df-spreadsheet-table td {
  border: 1px solid var(--df-border);
  padding: 2px 6px;
  min-width: 80px;
  height: 24px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.df-spreadsheet-table th {
  background: var(--df-bg-secondary);
  font-weight: 500;
  color: var(--df-text-secondary);
  position: sticky;
  top: 0;
  z-index: 1;
}

.df-spreadsheet-row-header {
  background: var(--df-bg-secondary);
  font-weight: 500;
  color: var(--df-text-secondary);
  min-width: 40px !important;
  text-align: center;
  position: sticky;
  left: 0;
  z-index: 1;
}

.df-spreadsheet-cell.selected {
  outline: 2px solid var(--df-primary);
  outline-offset: -1px;
}

.df-spreadsheet-cell.editing {
  padding: 0;
}

.df-spreadsheet-cell.editing input {
  width: 100%;
  height: 100%;
  border: none;
  padding: 2px 6px;
  font-size: inherit;
  font-family: inherit;
  outline: none;
}

.df-sheet-tabs {
  display: flex;
  align-items: center;
  padding: var(--df-space-xs);
  background: var(--df-bg-secondary);
  border-top: 1px solid var(--df-border);
  gap: 2px;
  overflow-x: auto;
}

.df-sheet-tab {
  padding: var(--df-space-xs) var(--df-space-md);
  border: 1px solid var(--df-border);
  border-bottom: none;
  border-radius: var(--df-radius-sm) var(--df-radius-sm) 0 0;
  background: var(--df-surface);
  cursor: pointer;
  font-size: var(--df-font-size-sm);
  transition: background var(--df-transition);
}

.df-sheet-tab:hover {
  background: var(--df-primary-light);
}

.df-sheet-tab.active {
  background: var(--df-primary);
  color: var(--df-text-inverse);
  border-color: var(--df-primary);
}

.df-formula-bar {
  display: flex;
  align-items: center;
  padding: var(--df-space-xs) var(--df-space-md);
  background: var(--df-surface);
  border-bottom: 1px solid var(--df-border);
  gap: var(--df-space-sm);
}

.df-formula-bar-label {
  font-size: var(--df-font-size-sm);
  font-weight: 600;
  color: var(--df-text-secondary);
  min-width: 60px;
}

.df-formula-bar-input {
  flex: 1;
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius-sm);
  padding: var(--df-space-xs) var(--df-space-sm);
  font-family: var(--df-font-mono);
  font-size: var(--df-font-size-sm);
}

/* Presentation styles */
.df-presentation {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.df-slide-panel {
  width: 200px;
  background: var(--df-bg-secondary);
  border-right: 1px solid var(--df-border);
  overflow-y: auto;
  padding: var(--df-space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--df-space-sm);
}

.df-slide-thumbnail {
  aspect-ratio: 16/9;
  background: var(--df-surface);
  border: 2px solid var(--df-border);
  border-radius: var(--df-radius-sm);
  cursor: pointer;
  padding: var(--df-space-xs);
  font-size: 0.6rem;
  overflow: hidden;
  transition: border-color var(--df-transition);
}

.df-slide-thumbnail:hover {
  border-color: var(--df-primary-light);
}

.df-slide-thumbnail.active {
  border-color: var(--df-primary);
}

.df-slide-canvas {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--df-bg-secondary);
  padding: var(--df-space-lg);
}

.df-slide {
  aspect-ratio: 16/9;
  width: 100%;
  max-width: 960px;
  background: var(--df-surface);
  box-shadow: var(--df-editor-page-shadow);
  border-radius: var(--df-radius-sm);
  position: relative;
  overflow: hidden;
}

.df-slide-shape {
  position: absolute;
  cursor: move;
}

.df-slide-shape.selected {
  outline: 2px solid var(--df-primary);
}

.df-slide-shape-text {
  padding: var(--df-space-sm);
  outline: none;
  min-height: 1em;
}

/* Utility classes */
.df-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.df-flex { display: flex; }
.df-flex-col { flex-direction: column; }
.df-items-center { align-items: center; }
.df-justify-center { justify-content: center; }
.df-gap-sm { gap: var(--df-space-sm); }
.df-gap-md { gap: var(--df-space-md); }

/* Enhanced toolbar pickers */
.df-font-picker {
  min-width: 130px;
}

.df-size-picker {
  min-width: 60px;
}

.df-spacing-picker {
  min-width: 55px;
}

/* Toolbar dropdown container */
.df-toolbar-dropdown {
  position: relative;
  display: inline-flex;
}

/* Color picker */
.df-color-picker {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 100;
  background: var(--df-surface);
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  padding: var(--df-space-sm);
  min-width: 200px;
}

.df-color-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 2px;
  margin-bottom: var(--df-space-sm);
}

.df-color-swatch {
  width: 18px;
  height: 18px;
  border: 1px solid var(--df-border);
  border-radius: 2px;
  cursor: pointer;
  padding: 0;
  transition: transform 0.1s ease;
}

.df-color-swatch:hover {
  transform: scale(1.3);
  z-index: 1;
  border-color: var(--df-primary);
}

.df-color-custom {
  display: flex;
  align-items: center;
  gap: var(--df-space-sm);
  padding-top: var(--df-space-sm);
  border-top: 1px solid var(--df-border);
}

.df-color-custom input[type="color"] {
  width: 28px;
  height: 28px;
  border: none;
  padding: 0;
  cursor: pointer;
}

.df-color-no-color {
  width: 100%;
  padding: var(--df-space-xs);
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius-sm);
  background: var(--df-surface);
  color: var(--df-text-secondary);
  cursor: pointer;
  font-size: var(--df-font-size-sm);
  margin-bottom: var(--df-space-sm);
}

.df-color-no-color:hover {
  background: var(--df-bg-secondary);
}

/* Alignment icons using CSS lines */
.df-align-icon {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  width: 14px;
  height: 12px;
  justify-content: center;
}

.df-align-icon::before,
.df-align-icon::after {
  content: '';
  height: 2px;
  background: currentColor;
  border-radius: 1px;
}

.df-align-icon span {
  height: 2px;
  background: currentColor;
  border-radius: 1px;
}

.df-align-left::before { width: 100%; }
.df-align-left::after { width: 70%; }

.df-align-center::before { width: 100%; margin: 0 auto; }
.df-align-center::after { width: 70%; margin: 0 auto; }

.df-align-right::before { width: 100%; }
.df-align-right::after { width: 70%; margin-left: auto; }

.df-align-justify::before { width: 100%; }
.df-align-justify::after { width: 100%; }

/* Form elements in dialogs */
.df-form-field {
  margin-bottom: var(--df-space-md);
}

.df-form-field label {
  display: block;
  margin-bottom: var(--df-space-xs);
  font-size: var(--df-font-size-sm);
  font-weight: 500;
  color: var(--df-text-secondary);
}

.df-input {
  width: 100%;
  padding: var(--df-space-sm);
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius-sm);
  font-size: var(--df-font-size-sm);
  font-family: var(--df-font-sans);
  color: var(--df-text);
  background: var(--df-surface);
  transition: border-color var(--df-transition);
}

.df-input:focus {
  outline: none;
  border-color: var(--df-border-focus);
  box-shadow: 0 0 0 2px var(--df-primary-light);
}

/* Form tabs for image dialog */
.df-form-tabs {
  display: flex;
  gap: var(--df-space-xs);
  margin-bottom: var(--df-space-md);
  border-bottom: 1px solid var(--df-border);
  padding-bottom: var(--df-space-xs);
}

.df-tab {
  padding: var(--df-space-xs) var(--df-space-md);
  border: none;
  background: transparent;
  color: var(--df-text-secondary);
  cursor: pointer;
  font-size: var(--df-font-size-sm);
  border-bottom: 2px solid transparent;
  transition: all var(--df-transition);
}

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

.df-tab.active {
  color: var(--df-primary);
  border-bottom-color: var(--df-primary);
  font-weight: 500;
}

/* Image preview in dialog */
.df-image-preview {
  margin-top: var(--df-space-md);
  padding: var(--df-space-md);
  border: 1px dashed var(--df-border);
  border-radius: var(--df-radius-md);
  text-align: center;
  background: var(--df-bg-secondary);
}

/* Find & Replace dialog */
.df-find-replace-dialog {
  min-width: 450px;
}

.df-form-options {
  display: flex;
  gap: var(--df-space-md);
  margin-bottom: var(--df-space-md);
}

.df-form-options label {
  display: flex;
  align-items: center;
  gap: var(--df-space-xs);
  font-size: var(--df-font-size-sm);
  color: var(--df-text-secondary);
  cursor: pointer;
}

.df-find-stats {
  font-size: var(--df-font-size-sm);
  color: var(--df-text-muted);
  padding: var(--df-space-xs) 0;
}

/* Context Menu */
.df-context-menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 900;
}

.df-context-menu {
  position: fixed;
  z-index: 950;
  background: var(--df-surface);
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  min-width: 180px;
  padding: var(--df-space-xs) 0;
}

.df-context-menu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--df-space-xs) var(--df-space-md);
  cursor: pointer;
  font-size: var(--df-font-size-sm);
  color: var(--df-text);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  transition: background var(--df-transition);
}

.df-context-menu-item:hover {
  background: var(--df-primary-light);
}

.df-context-menu-item:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.df-context-menu-item .shortcut {
  font-size: 0.75rem;
  color: var(--df-text-muted);
  margin-left: var(--df-space-lg);
}

.df-context-menu-separator {
  height: 1px;
  background: var(--df-border);
  margin: var(--df-space-xs) 0;
}

/* Table context toolbar */
.df-table-toolbar {
  background: var(--df-primary-light);
  border-radius: var(--df-radius-sm);
  padding: 2px var(--df-space-xs);
}

/* ProseMirror task list */
.ProseMirror ul[data-type="taskList"] {
  list-style: none;
  padding-left: 0;
}

.ProseMirror ul[data-type="taskList"] li {
  display: flex;
  align-items: flex-start;
  gap: var(--df-space-sm);
}

.ProseMirror ul[data-type="taskList"] li > label {
  flex-shrink: 0;
  margin-top: 0.25em;
}

.ProseMirror ul[data-type="taskList"] li > label input[type="checkbox"] {
  cursor: pointer;
  width: 16px;
  height: 16px;
}

.ProseMirror ul[data-type="taskList"] li > div {
  flex: 1;
}

/* ProseMirror superscript/subscript */
.ProseMirror sup { font-size: 0.75em; vertical-align: super; }
.ProseMirror sub { font-size: 0.75em; vertical-align: sub; }

/* Dirty indicator */
.df-header-dirty {
  color: var(--df-warning);
  font-weight: 600;
  margin-left: 2px;
}

/* Save As dialog format grid */
.df-save-as-formats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: var(--df-space-sm);
  margin-bottom: var(--df-space-md);
}