@import '../styles/viewer.css';

/* Universal Editor — Core UI Design System */

:root {
  /* Phase 22 Design Tokens & CSS Variables */
  --editor-bg: #0f172a;
  --editor-text: #f8fafc;
  --editor-border: rgba(255, 255, 255, 0.12);
  --editor-toolbar-bg: #1e293b;
  --editor-toolbar-height: 44px;
  --editor-button-hover: rgba(255, 255, 255, 0.08);
  --editor-button-active: rgba(99, 102, 241, 0.25);
  --editor-placeholder: #64748b;
  --editor-radius: 8px;
  --editor-font-family: var(--font-sans, "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, sans-serif);
  --editor-font-size: 15px;
  --editor-button-size: 32px;
  --editor-active-color: #818cf8;
  --editor-accent-color: #a855f7;

  /* Legacy & Internal fallbacks */
  --ue-bg: var(--editor-bg);
  --ue-toolbar-bg: var(--editor-toolbar-bg);
  --ue-toolbar-border: var(--editor-border);
  --ue-btn-color: var(--editor-text);
  --ue-btn-hover-color: #ffffff;
  --ue-btn-hover-bg: var(--editor-button-hover);
  --ue-btn-active-color: var(--editor-active-color);
  --ue-btn-active-bg: var(--editor-button-active);
  --ue-btn-active-border: var(--editor-active-color);
  --ue-accent: var(--editor-active-color);
  --ue-accent-hover: var(--editor-accent-color);
  --ue-radius: var(--editor-radius);
  --ue-radius-sm: calc(var(--editor-radius) - 2px);
  --ue-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --ue-font-sans: var(--editor-font-family);
}

/* Toolbar Container */
.ue-toolbar {
  --ue-btn-color: var(--editor-text, #f8fafc);
  --ue-btn-hover-bg: var(--editor-button-hover, rgba(255, 255, 255, 0.08));
  --ue-btn-active-bg: var(--editor-button-active, rgba(99, 102, 241, 0.25));
  --ue-btn-active-color: var(--editor-active-color, #818cf8);
  --ue-btn-active-border: var(--editor-active-color, #818cf8);
  --ue-toolbar-border: var(--editor-border, rgba(255, 255, 255, 0.12));

  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  padding: 8px 12px;
  min-height: var(--editor-toolbar-height, 44px);
  background: var(--editor-toolbar-bg, var(--ue-toolbar-bg));
  border-bottom: 1px solid var(--editor-border, var(--ue-toolbar-border));
  border-top-left-radius: var(--editor-radius, var(--ue-radius));
  border-top-right-radius: var(--editor-radius, var(--ue-radius));
  user-select: none;
  font-family: var(--editor-font-family, var(--ue-font-sans));
  color: var(--editor-text, #f8fafc);
}

/* Toolbar Button */
.ue-toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: var(--editor-button-size, 32px);
  height: var(--editor-button-size, 32px);
  padding: 0 6px;
  background: transparent;
  color: var(--editor-text, var(--ue-btn-color));
  border: 1px solid transparent;
  border-radius: var(--ue-radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s ease;
  outline: none;
}

.ue-toolbar-btn:hover:not(:disabled) {
  background: var(--editor-button-hover, var(--ue-btn-hover-bg));
  color: var(--editor-active-color, var(--ue-btn-hover-color));
}

.ue-toolbar-btn.is-active {
  background: var(--editor-button-active, var(--ue-btn-active-bg));
  color: var(--editor-active-color, var(--ue-btn-active-color));
  border-color: var(--editor-active-color, var(--ue-btn-active-border));
}

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

.ue-toolbar-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Divider */
.ue-toolbar-divider {
  width: 1px;
  height: 20px;
  background: var(--editor-border, var(--ue-toolbar-border));
  margin: 0 4px;
}

/* Dropdown */
.ue-dropdown {
  position: relative;
  display: inline-block;
}

.ue-dropdown-btn {
  padding: 0 8px;
  gap: 4px;
  color: var(--editor-text, var(--ue-btn-color));
}

.ue-dropdown-btn .chevron {
  transition: transform 0.2s ease;
}

.ue-dropdown.is-open .ue-dropdown-btn .chevron {
  transform: rotate(180deg);
}

.ue-dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 1000;
  min-width: 140px;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--ue-radius-sm);
  box-shadow: var(--ue-shadow);
  padding: 4px;
  display: none;
  flex-direction: column;
  gap: 2px;
}

.ue-dropdown.is-open .ue-dropdown-menu {
  display: flex;
}

.ue-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 4px;
  background: transparent;
  color: #cbd5e1;
  border: none;
  text-align: left;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
  width: 100%;
}

.ue-dropdown-item:hover {
  background: rgba(99, 102, 241, 0.15);
  color: #fff;
}

.ue-dropdown-item.is-active {
  background: rgba(99, 102, 241, 0.25);
  color: #818cf8;
  font-weight: 600;
}

/* Bubble Menu */
.ue-bubble-menu {
  position: absolute;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 2px;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--ue-radius-sm);
  padding: 4px;
  box-shadow: var(--ue-shadow);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition:
    opacity 0.15s ease,
    transform 0.15s ease;
}

.ue-bubble-menu.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.ue-bubble-menu .ue-toolbar-btn {
  height: 28px;
  min-width: 28px;
  padding: 0 4px;
}

/* Link Dialog */
.ue-dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.ue-dialog-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.ue-dialog {
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--ue-radius);
  width: 90%;
  max-width: 440px;
  padding: 20px;
  box-shadow: var(--ue-shadow);
  transform: scale(0.95);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  color: #f8fafc;
  font-family: var(--ue-font-sans);
}

.ue-dialog-overlay.is-open .ue-dialog {
  transform: scale(1);
}

.ue-dialog-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ue-form-group {
  margin-bottom: 14px;
}

.ue-form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: #94a3b8;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ue-input {
  width: 100%;
  padding: 8px 12px;
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--ue-radius-sm);
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

.ue-input:focus {
  border-color: var(--ue-accent);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

.ue-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #cbd5e1;
  cursor: pointer;
}

.ue-dialog-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.ue-btn {
  padding: 7px 14px;
  border-radius: var(--ue-radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.ue-btn-primary {
  background: var(--ue-accent);
  color: #fff;
}

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

.ue-btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
  border-color: rgba(255, 255, 255, 0.1);
}

.ue-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
}

.ue-btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.3);
  margin-right: auto;
}

.ue-btn-danger:hover {
  background: #ef4444;
  color: #fff;
}

/* Task List Editor Styling */
ul[data-type='taskList'] {
  list-style: none;
  padding: 0;
  margin: 1em 0;
}

ul[data-type='taskList'] li[data-type='taskItem'] {
  display: flex;
  align-items: flex-start;
  margin-bottom: 0.4em;
}

ul[data-type='taskList'] li[data-type='taskItem'] > label {
  margin-right: 0.6em;
  user-select: none;
}

ul[data-type='taskList'] li[data-type='taskItem'] > label input[type='checkbox'] {
  cursor: pointer;
  accent-color: var(--ue-accent);
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

ul[data-type='taskList'] li[data-type='taskItem'] > div {
  flex: 1;
}

ul[data-type='taskList'] li[data-type='taskItem'][data-checked='true'] > div {
  text-decoration: line-through;
  opacity: 0.6;
}

/* Editor link styles */
.editor-link,
.ProseMirror a {
  color: #38bdf8;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.editor-link:hover,
.ProseMirror a:hover {
  color: #7dd3fc;
}

/* Image & Media Styling */
.ue-image-figure {
  margin: 1.5em 0;
  display: flex;
  flex-direction: column;
}

.ue-image-figure.ue-image-align-center {
  margin-left: auto;
  margin-right: auto;
  align-items: center;
}

.ue-image-figure.ue-image-align-left {
  margin-right: auto;
  align-items: flex-start;
}

.ue-image-figure.ue-image-align-right {
  margin-left: auto;
  align-items: flex-end;
}

.ue-image-figure img {
  border-radius: var(--ue-radius, 8px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  display: block;
  max-width: 100%;
  height: auto;
}

.ue-image-caption {
  font-size: 0.85em;
  color: #94a3b8;
  margin-top: 6px;
  text-align: center;
  font-style: italic;
}

/* File Attachment Card */
.ue-file-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--ue-radius, 8px);
  margin: 1em 0;
  user-select: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  transition:
    transform 0.15s ease,
    border-color 0.15s ease;
}

.ue-file-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.ue-file-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--ue-radius-sm, 6px);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ue-file-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ue-file-name {
  font-weight: 600;
  font-size: 0.9em;
  color: #f8fafc;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ue-file-size {
  font-size: 0.78em;
  color: #94a3b8;
  font-family: var(--font-mono, monospace);
}

.ue-file-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 0.8em;
  font-weight: 600;
  border-radius: var(--ue-radius-sm, 6px);
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  border: 1px solid rgba(99, 102, 241, 0.3);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ue-file-download:hover {
  background: #6366f1;
  color: #ffffff;
}

/* Dropzone & Upload Progress */
.ue-dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--ue-radius, 8px);
  padding: 24px 16px;
  text-align: center;
  background: rgba(15, 23, 42, 0.4);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.ue-dropzone:hover,
.ue-dropzone.is-dragover {
  border-color: var(--ue-accent, #6366f1);
  background: rgba(99, 102, 241, 0.08);
}

.ue-dropzone-icon {
  color: #94a3b8;
}

.ue-dropzone-text {
  font-size: 13px;
  color: #cbd5e1;
}

.ue-dropzone-hint {
  font-size: 11px;
  color: #64748b;
}

.ue-progress-container {
  margin: 14px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ue-progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 9999px;
  overflow: hidden;
}

.ue-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #6366f1, #06b6d4);
  transition: width 0.15s ease;
}

.ue-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: #94a3b8;
}

/* --- Phase 7 Advanced Formatting Styles --- */

/* Color Picker Button & Indicator */
.ue-color-btn {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4px 6px;
  gap: 2px;
}

.ue-color-indicator {
  display: block;
  width: 16px;
  height: 3px;
  border-radius: 2px;
  background-color: #3b82f6;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.ue-color-menu {
  padding: 10px;
  min-width: 170px;
}

.ue-color-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 10px;
}

.ue-color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
  padding: 0;
  outline: none;
}

.ue-color-swatch:hover {
  transform: scale(1.15);
  border-color: #ffffff;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.ue-color-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.ue-custom-color-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 500;
  color: #9ca3af;
  cursor: pointer;
}

.ue-custom-color-input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.ue-custom-color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.ue-custom-color-input::-webkit-color-swatch {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

.ue-color-clear-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  font-size: 11px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.ue-color-clear-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
  color: #f87171;
}

/* Text Direction (RTL / LTR) */
[dir="rtl"] {
  direction: rtl;
  text-align: right;
}

[dir="ltr"] {
  direction: ltr;
  text-align: left;
}

/* Typography Enhancements for Sub/Superscript */
sub {
  vertical-align: sub;
  font-size: 0.75em;
  line-height: 0;
}

sup {
  vertical-align: super;
  font-size: 0.75em;
  line-height: 0;
}

/* ==========================================================================
   Phase 8: Table Components, Responsiveness & Visual Design System
   ========================================================================== */

/* Responsive Table Wrapper (Horizontal scrolling for mobile / constrained viewports) */
.tableWrapper {
  overflow-x: auto;
  margin: 1.5em 0;
  max-width: 100%;
  border-radius: var(--ue-radius);
  border: 1px solid var(--ue-toolbar-border);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
}

.tableWrapper::-webkit-scrollbar {
  height: 6px;
}

.tableWrapper::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

/* Editor Table Elements */
.ProseMirror table.ue-table,
.ue-table {
  border-collapse: collapse;
  table-layout: fixed;
  width: 100%;
  margin: 0;
  overflow: hidden;
  font-size: 14px;
}

.ProseMirror table.ue-table td,
.ProseMirror table.ue-table th,
.ue-table td,
.ue-table th {
  min-width: 80px;
  padding: 10px 14px;
  vertical-align: top;
  box-sizing: border-box;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.ProseMirror table.ue-table th,
.ue-table th {
  font-weight: 600;
  text-align: left;
  background: rgba(255, 255, 255, 0.05);
  color: #f1f5f9;
}

.ProseMirror table.ue-table td,
.ue-table td {
  background: transparent;
  color: #e2e8f0;
}

/* Selected Cells (Multi-cell drag selection) */
.ProseMirror table.ue-table .selectedCell:after,
.ue-table .selectedCell:after {
  z-index: 2;
  position: absolute;
  content: "";
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background: rgba(99, 102, 241, 0.18);
  pointer-events: none;
  border: 1.5px solid #6366f1;
}

/* Column Resize Handle */
.ProseMirror table.ue-table .column-resize-handle,
.ue-table .column-resize-handle {
  position: absolute;
  right: -2px;
  top: 0;
  bottom: -2px;
  width: 4px;
  background-color: var(--ue-accent);
  pointer-events: none;
  z-index: 20;
}

.ProseMirror.resize-cursor {
  cursor: col-resize;
}

/* Interactive Table Dialog Matrix Grid */
.ue-table-grid-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--ue-radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.ue-table-grid-label {
  font-size: 13px;
  font-weight: 600;
  color: #a5b4fc;
}

.ue-table-grid-matrix {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.ue-grid-row {
  display: flex;
  gap: 3px;
}

.ue-grid-cell {
  width: 22px;
  height: 22px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.1s ease;
}

.ue-grid-cell.active {
  background: rgba(99, 102, 241, 0.4);
  border-color: #6366f1;
  box-shadow: 0 0 6px rgba(99, 102, 241, 0.5);
}

/* Floating Table Toolbar */
.ue-table-toolbar {
  position: absolute;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px 6px;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--ue-radius-sm);
  box-shadow: var(--ue-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  pointer-events: none;
}

.ue-table-toolbar.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.ue-table-toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: transparent;
  color: var(--ue-btn-color);
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  outline: none;
  transition: all 0.12s ease;
}

.ue-table-toolbar-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.ue-table-toolbar-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.ue-table-toolbar-btn.active {
  background: rgba(99, 102, 241, 0.2);
  color: #818cf8;
  border-color: rgba(99, 102, 241, 0.4);
}

.ue-btn-danger-icon:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.2) !important;
  color: #f87171 !important;
}

/* Context Menu */
.ue-context-menu {
  position: absolute;
  z-index: 200;
  display: flex;
  flex-direction: column;
  min-width: 210px;
  padding: 6px;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--ue-radius);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
  opacity: 0;
  visibility: hidden;
  transform: scale(0.96);
  transform-origin: top left;
  transition: opacity 0.12s ease, transform 0.12s ease, visibility 0.12s;
  pointer-events: none;
  user-select: none;
}

.ue-context-menu.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  pointer-events: auto;
}

.ue-context-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 10px;
  background: transparent;
  color: #cbd5e1;
  border: none;
  border-radius: 4px;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  outline: none;
  transition: background 0.12s ease, color 0.12s ease;
}

.ue-context-menu-item:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  color: #f8fafc;
}

.ue-context-menu-item:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.ue-context-menu-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  color: #94a3b8;
}

.ue-context-menu-item:hover:not(:disabled) .ue-context-menu-icon {
  color: #6366f1;
}

.ue-context-menu-text {
  flex: 1;
}

.ue-context-menu-separator {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 4px 6px;
}

.ue-context-menu-danger {
  color: #f87171;
}

.ue-context-menu-danger:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.15) !important;
  color: #fca5a5 !important;
}

.ue-context-menu-danger .ue-context-menu-icon {
  color: #f87171;
}

/* ==========================================================================
   Phase 9: Code Blocks & Syntax Highlighting (Developer Features)
   ========================================================================== */

/* Code Block Outer Container */
.ue-code-block-container {
  margin: 1.5em 0;
  border-radius: var(--ue-radius);
  background: #0d1117;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Code Block Header Window Bar */
.ue-code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: #161b22;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  user-select: none;
}

.ue-code-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Terminal Window Dots */
.ue-code-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ue-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
  opacity: 0.85;
  transition: opacity 0.15s ease;
}

.ue-code-block-container:hover .ue-dot {
  opacity: 1;
}

.ue-dot-red {
  background: #ff5f56;
  box-shadow: 0 0 6px rgba(255, 95, 86, 0.4);
}

.ue-dot-yellow {
  background: #ffbd2e;
  box-shadow: 0 0 6px rgba(255, 189, 46, 0.4);
}

.ue-dot-green {
  background: #27c93f;
  box-shadow: 0 0 6px rgba(39, 201, 63, 0.4);
}

/* Language Selector Dropdown */
.ue-code-lang-select {
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.06);
  color: #94a3b8;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 3px 10px;
  font-size: 11.5px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: all 0.15s ease;
}

.ue-code-lang-select:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #f1f5f9;
  border-color: rgba(255, 255, 255, 0.2);
}

.ue-code-lang-select:focus {
  border-color: var(--ue-accent);
  color: #ffffff;
}

.ue-code-lang-select option {
  background: #1e293b;
  color: #f1f5f9;
}

/* Copy Code Button */
.ue-code-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ue-code-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  color: #94a3b8;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 500;
  font-family: var(--ue-font-sans);
  cursor: pointer;
  outline: none;
  transition: all 0.15s ease;
}

.ue-code-copy-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.2);
}

.ue-code-copy-btn.copied {
  color: #34d399 !important;
  background: rgba(52, 211, 153, 0.15) !important;
  border-color: rgba(52, 211, 153, 0.4) !important;
}

.ue-copy-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ue-copy-icon svg {
  width: 13px;
  height: 13px;
}

/* Code Pre and Highlighting */
.ue-code-pre {
  margin: 0;
  padding: 16px 18px;
  background: transparent;
  overflow-x: auto;
  tab-size: 2;
}

.ue-code-pre::-webkit-scrollbar {
  height: 6px;
}

.ue-code-pre::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

.ue-code-pre code.hljs {
  display: block;
  padding: 0;
  background: transparent;
  color: #e6edf3;
  font-size: 13.5px;
  line-height: 1.65;
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  white-space: pre;
}

/* ==========================================================================
   Highlight.js Clean Enterprise Dark Theme
   ========================================================================== */

.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
  color: #ff7b72;
  font-weight: 600;
}

.hljs-string,
.hljs-title,
.hljs-section,
.hljs-attribute,
.hljs-literal,
.hljs-template-tag,
.hljs-template-variable,
.hljs-type,
.hljs-addition {
  color: #a5d6ff;
}

.hljs-comment,
.hljs-quote {
  color: #8b949e;
  font-style: italic;
}

.hljs-name,
.hljs-tag {
  color: #7ee787;
}

.hljs-number,
.hljs-variable,
.hljs-link {
  color: #79c0ff;
}

.hljs-function {
  color: #d2a8ff;
}

.hljs-built_in,
.hljs-symbol,
.hljs-bullet {
  color: #ffa657;
}

.hljs-params {
  color: #c9d1d9;
}

.hljs-punctuation,
.hljs-operator {
  color: #e6edf3;
}

.hljs-deletion {
  color: #ffdcd7;
  background-color: #67060c;
}

/* ==========================================================================
   Phase 10: Media Embeds (YouTube, Vimeo, Google Maps, HTML5 Video, Iframes)
   ========================================================================== */

.ue-embed-wrapper {
  margin: 1.5rem auto;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--ue-toolbar-border);
  background: #0f172a;
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.35);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  user-select: none;
}

.ue-embed-wrapper:hover,
.ue-embed-wrapper.ProseMirror-selectednode {
  border-color: var(--ue-primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25), 0 8px 24px -4px rgba(0, 0, 0, 0.45);
}

.ue-embed-align-left {
  margin-left: 0;
  margin-right: auto;
}

.ue-embed-align-center {
  margin-left: auto;
  margin-right: auto;
}

.ue-embed-align-right {
  margin-left: auto;
  margin-right: 0;
}

.ue-embed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: rgba(30, 41, 59, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.ue-embed-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: #cbd5e1;
  letter-spacing: 0.02em;
}

.ue-embed-badge-icon,
.ue-badge-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  color: #818cf8;
}

.ue-embed-badge-icon svg,
.ue-badge-icon svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.ue-embed-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ue-embed-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: #94a3b8;
  transition: all 0.15s ease;
  text-decoration: none;
}

.ue-embed-action-btn:hover {
  color: #f1f5f9;
  background: rgba(255, 255, 255, 0.08);
}

.ue-embed-action-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.ue-embed-delete-btn:hover {
  color: #f87171;
  background: rgba(239, 68, 68, 0.15);
}

.ue-embed-frame-box,
.ue-embed-responsive {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #090d16;
  overflow: hidden;
}

.ue-embed-iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.ue-embed-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
  display: block;
}

/* Embed Dialog Specific Styles */
.ue-embed-dialog {
  border-radius: 12px;
}

.ue-embed-detection-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 500;
  border-radius: 6px;
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.25);
  transition: all 0.2s ease;
}

.ue-embed-detection-badge.valid {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}

.ue-embed-detection-badge strong {
  font-weight: 600;
  color: inherit;
}

.ue-dialog-error {
  font-size: 11.5px;
  color: #f87171;
  padding: 6px 10px;
  border-radius: 6px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

/* ==========================================================================
   Phase 11: Notion-Style Slash Commands Menu
   ========================================================================== */

.ue-slash-menu {
  position: fixed;
  z-index: 99999;
  width: 320px;
  max-height: 380px;
  background: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  box-shadow:
    0 10px 30px -4px rgba(0, 0, 0, 0.5),
    0 4px 12px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
  animation: ue-slash-fade-in 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes ue-slash-fade-in {
  from {
    opacity: 0;
    transform: translateY(4px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.ue-slash-header {
  padding: 8px 12px 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(30, 41, 59, 0.5);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ue-slash-header-title {
  font-size: 11.5px;
  font-weight: 600;
  color: #cbd5e1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.ue-slash-header-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: rgba(99, 102, 241, 0.25);
  color: #818cf8;
  font-family: var(--ue-font-mono, monospace);
  font-size: 11px;
  font-weight: 700;
}

.ue-slash-header-hint {
  font-size: 10px;
  color: #64748b;
}

.ue-slash-list {
  padding: 6px;
  overflow-y: auto;
  max-height: 320px;
}

.ue-slash-list::-webkit-scrollbar {
  width: 5px;
}

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

.ue-slash-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.ue-slash-list::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

.ue-slash-group-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #64748b;
  padding: 6px 10px 3px;
  margin-top: 4px;
}

.ue-slash-group-title:first-child {
  margin-top: 0;
}

.ue-slash-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.12s ease, transform 0.1s ease;
  margin-bottom: 2px;
}

.ue-slash-item:hover,
.ue-slash-item.is-selected {
  background: rgba(99, 102, 241, 0.18);
}

.ue-slash-item.is-selected {
  outline: 1px solid rgba(99, 102, 241, 0.35);
}

.ue-slash-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  color: #94a3b8;
  flex-shrink: 0;
  transition: all 0.12s ease;
}

.ue-slash-item-icon svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.ue-slash-item.is-selected .ue-slash-item-icon,
.ue-slash-item:hover .ue-slash-item-icon {
  background: rgba(99, 102, 241, 0.3);
  color: #c7d2fe;
}

.ue-slash-item-content {
  flex: 1;
  min-width: 0;
}

.ue-slash-item-title {
  font-size: 13px;
  font-weight: 500;
  color: #f1f5f9;
  line-height: 1.25;
}

.ue-slash-item-desc {
  font-size: 11px;
  color: #94a3b8;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.ue-slash-item-badge {
  font-size: 10.5px;
  font-family: var(--ue-font-mono, monospace);
  color: #64748b;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
  flex-shrink: 0;
  transition: all 0.12s ease;
}

.ue-slash-item.is-selected .ue-slash-item-badge,
.ue-slash-item:hover .ue-slash-item-badge {
  color: #a5b4fc;
  background: rgba(99, 102, 241, 0.25);
}

.ue-slash-empty {
  padding: 24px 16px;
  text-align: center;
  font-size: 12px;
  color: #94a3b8;
  font-style: italic;
}

/* ==========================================================================
   Phase 12: Mentions System (@ User Mention Chips & Autocomplete Popover)
   ========================================================================== */

/* Inline Mention Chip in Document */
.ue-mention,
.ProseMirror span[data-type="mention"] {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 7px;
  margin: 0 2px;
  border-radius: 9999px;
  background: rgba(99, 102, 241, 0.16);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: #818cf8;
  font-weight: 500;
  font-size: 0.92em;
  line-height: 1.4;
  vertical-align: baseline;
  text-decoration: none;
  cursor: pointer;
  user-select: all;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  transition: all 0.15s ease;
}

.ue-mention:hover,
.ProseMirror span[data-type="mention"]:hover {
  background: rgba(99, 102, 241, 0.28);
  border-color: rgba(99, 102, 241, 0.6);
  color: #a5b4fc;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.35);
}

/* Floating Mention Dropdown List */
.ue-mention-list {
  position: fixed;
  z-index: 99999;
  width: 290px;
  max-height: 360px;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  box-shadow:
    0 12px 32px -4px rgba(0, 0, 0, 0.55),
    0 4px 12px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
  animation: ue-mention-fade-in 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes ue-mention-fade-in {
  from {
    opacity: 0;
    transform: translateY(4px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.ue-mention-header {
  padding: 8px 12px 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(30, 41, 59, 0.5);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ue-mention-header-title {
  font-size: 11.5px;
  font-weight: 600;
  color: #cbd5e1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.ue-mention-header-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: rgba(99, 102, 241, 0.25);
  color: #818cf8;
  font-family: var(--ue-font-mono, monospace);
  font-size: 11px;
  font-weight: 700;
}

.ue-mention-header-hint {
  font-size: 10px;
  color: #64748b;
}

.ue-mention-items {
  padding: 6px;
  overflow-y: auto;
  max-height: 300px;
}

.ue-mention-items::-webkit-scrollbar {
  width: 5px;
}

.ue-mention-items::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.ue-mention-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.12s ease;
  margin-bottom: 2px;
}

.ue-mention-item:hover,
.ue-mention-item.is-selected {
  background: rgba(99, 102, 241, 0.18);
}

.ue-mention-item.is-selected {
  outline: 1px solid rgba(99, 102, 241, 0.35);
}

.ue-mention-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.ue-mention-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ue-mention-avatar-fallback {
  font-size: 11px;
  font-weight: 600;
  color: #cbd5e1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ue-mention-details {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.ue-mention-name-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ue-mention-name {
  font-size: 13px;
  font-weight: 500;
  color: #f1f5f9;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ue-mention-badge {
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(99, 102, 241, 0.22);
  color: #a5b4fc;
}

.ue-mention-sub-row {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: #94a3b8;
}

.ue-mention-username {
  color: #818cf8;
  font-weight: 500;
}

.ue-mention-role {
  color: #64748b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ue-mention-empty {
  padding: 24px 16px;
  text-align: center;
  font-size: 12px;
  color: #94a3b8;
  font-style: italic;
}

/* ==========================================================================
   Phase 13: Autosave & Draft System Styles
   ========================================================================== */

.ue-autosave-container {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-size: 12px;
  user-select: none;
}

.ue-autosave-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 9999px;
  font-size: 11.5px;
  font-weight: 500;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.ue-autosave-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Saved state */
.ue-autosave-status-saved {
  color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.2);
}

/* Saving state */
.ue-autosave-status-saving {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.2);
}

.ue-autosave-spin {
  animation: ue-spin 1s linear infinite;
}

@keyframes ue-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Unsaved state */
.ue-autosave-status-unsaved {
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.2);
}

.ue-autosave-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}

.ue-autosave-dot-unsaved {
  background-color: #fbbf24;
  box-shadow: 0 0 6px rgba(251, 191, 36, 0.6);
}

/* Error state */
.ue-autosave-status-error {
  color: #f87171;
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.2);
}

.ue-autosave-retry {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 4px;
  cursor: pointer;
  margin-left: 4px;
  transition: all 0.15s ease;
}

.ue-autosave-retry:hover {
  background: rgba(239, 68, 68, 0.35);
  color: #fff;
}

/* Draft detected notification banner */
.ue-draft-prompt {
  margin: 8px 0;
  padding: 8px 12px;
  border-radius: 8px;
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid rgba(99, 102, 241, 0.3);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  animation: ue-fade-in 0.2s ease-out;
}

.ue-draft-prompt-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
}

.ue-draft-prompt-text {
  color: #cbd5e1;
  font-weight: 500;
}

.ue-draft-prompt-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ue-draft-restore-btn {
  font-size: 11px;
  padding: 3px 8px;
  background: #6366f1;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.15s ease;
}

.ue-draft-restore-btn:hover {
  background: #4f46e5;
}

.ue-draft-discard-btn {
  font-size: 11px;
  padding: 3px 8px;
  background: transparent;
  color: #94a3b8;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ue-draft-discard-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #e2e8f0;
}

/* --- Phase 19 Document Version History & Diff Engine Styles --- */

ins.ue-diff-ins,
.ue-diff-ins {
  background-color: rgba(34, 197, 94, 0.2);
  color: #4ade80;
  text-decoration: underline;
  text-decoration-color: #22c55e;
  padding: 1px 3px;
  border-radius: 2px;
}

del.ue-diff-del,
.ue-diff-del {
  background-color: rgba(239, 68, 68, 0.2);
  color: #f87171;
  text-decoration: line-through;
  text-decoration-color: #ef4444;
  padding: 1px 3px;
  border-radius: 2px;
}

.ue-version-history-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.ue-version-history-container {
  width: 900px;
  max-width: 95vw;
  height: 80vh;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.ue-version-header {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ue-version-body {
  display: grid;
  grid-template-columns: 280px 1fr;
  flex: 1;
  overflow: hidden;
}

.ue-version-sidebar {
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ue-version-item {
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ue-version-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
}

.ue-version-item.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: #6366f1;
}

.ue-version-preview {
  padding: 20px;
  overflow-y: auto;
  background: #0f172a;
}

/* ==========================================================================
   Phase 20: Collaboration, Cursors, Comments & Document Locking
   ========================================================================== */

/* Collaboration Bar */
.ue-collab-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
  gap: 12px;
  user-select: none;
}

.ue-collab-users {
  display: flex;
  align-items: center;
}

.ue-collab-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  position: relative;
  cursor: pointer;
  margin-left: -6px;
  transition: transform 0.15s ease, z-index 0.15s ease;
}

.ue-collab-avatar:first-child {
  margin-left: 0;
}

.ue-collab-avatar:hover {
  transform: translateY(-2px) scale(1.1);
  z-index: 10;
}

.ue-collab-avatar-status {
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  border: 1.5px solid #0f172a;
}

.ue-collab-avatar-status.is-editing {
  background: #f59e0b;
}

/* Remote Cursor and Caret */
.ue-collab-cursor {
  position: relative;
  pointer-events: none;
}

.ue-collab-cursor-caret {
  position: absolute;
  width: 2px;
  height: 1.2em;
  background-color: var(--collab-color, #3b82f6);
  pointer-events: none;
}

.ue-collab-cursor-label {
  position: absolute;
  top: -1.5em;
  left: 0;
  padding: 1px 6px;
  font-size: 10px;
  font-weight: 600;
  border-radius: 3px;
  color: #fff;
  background-color: var(--collab-color, #3b82f6);
  white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

/* Inline Comment Anchor Highlight */
.ue-comment-highlight {
  background: rgba(245, 158, 11, 0.25);
  border-bottom: 2px solid #f59e0b;
  cursor: pointer;
  transition: background 0.15s ease;
  border-radius: 2px;
  padding: 1px 2px;
}

.ue-comment-highlight:hover,
.ue-comment-highlight.is-active {
  background: rgba(245, 158, 11, 0.45);
}

.ue-comment-highlight.is-resolved {
  background: transparent;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.3);
  opacity: 0.8;
}

/* Document Lock Banner */
.ue-lock-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: linear-gradient(90deg, rgba(239, 68, 68, 0.2) 0%, rgba(220, 38, 38, 0.1) 100%);
  border-bottom: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  font-size: 13px;
}

.ue-lock-banner.is-owner {
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.2) 0%, rgba(5, 150, 105, 0.1) 100%);
  border-bottom: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

/* Comments Sidebar Container */
.ue-comment-sidebar {
  width: 320px;
  background: #0f172a;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  height: 100%;
  font-size: 13px;
  color: #f8fafc;
}

.ue-comment-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.ue-comment-card {
  padding: 12px;
  margin: 8px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  transition: all 0.15s ease;
}

.ue-comment-card:hover,
.ue-comment-card.is-active {
  border-color: #6366f1;
  background: rgba(99, 102, 241, 0.06);
}

.ue-comment-quote {
  border-left: 2px solid #f59e0b;
  padding-left: 8px;
  margin-bottom: 8px;
  font-size: 12px;
  color: #94a3b8;
  font-style: italic;
}

.ue-comment-replies {
  margin-top: 8px;
  padding-left: 12px;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ==========================================================================
   Phase 21: AI Assistant Integration (Toolbar, Dialog, Shimmer, Preview)
   ========================================================================== */

/* AI Sparkle Button */
.ue-ai-btn {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.25) 0%, rgba(236, 72, 153, 0.25) 100%);
  border: 1px solid rgba(168, 85, 247, 0.4);
  color: #e9d5ff;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.ue-ai-btn:hover {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.4) 0%, rgba(236, 72, 153, 0.4) 100%);
  border-color: #c084fc;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
}

/* AI Assistant Modal / Dialog */
.ue-ai-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.ue-ai-modal {
  background: #0f172a;
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: 12px;
  width: 100%;
  max-width: 620px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 40px rgba(168, 85, 247, 0.15);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  color: #f8fafc;
  animation: ue-modal-fade 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.ue-ai-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.1) 0%, rgba(236, 72, 153, 0.05) 100%);
}

.ue-ai-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  color: #f1f5f9;
}

.ue-ai-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: 75vh;
  overflow-y: auto;
}

.ue-ai-action-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.ue-ai-action-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
}

.ue-ai-action-card:hover {
  background: rgba(168, 85, 247, 0.12);
  border-color: rgba(168, 85, 247, 0.4);
  transform: translateY(-1px);
}

.ue-ai-action-card.active {
  background: rgba(168, 85, 247, 0.2);
  border-color: #a855f7;
}

.ue-ai-action-icon {
  font-size: 18px;
}

.ue-ai-action-info {
  display: flex;
  flex-direction: column;
}

.ue-ai-action-title {
  font-weight: 600;
  font-size: 13px;
  color: #f8fafc;
}

.ue-ai-action-desc {
  font-size: 11px;
  color: #94a3b8;
}

.ue-ai-shimmer {
  height: 60px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.03) 25%, rgba(168, 85, 247, 0.15) 50%, rgba(255, 255, 255, 0.03) 75%);
  background-size: 200% 100%;
  animation: ue-ai-shimmer-anim 1.5s infinite;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #c084fc;
  font-size: 13px;
  gap: 8px;
}

@keyframes ue-ai-shimmer-anim {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.ue-ai-preview-box {
  background: #020617;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: #e2e8f0;
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
}

.ue-ai-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.2);
}

/* ==========================================================================
   Phase 23: Accessibility (WCAG 2.1 AA/AAA) & Mobile Optimization
   ========================================================================== */

/* Screen reader only utility (WCAG 2.1 live region / announcer) */
.ue-sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* High-contrast visible focus rings (:focus-visible) */
.ue-toolbar-btn:focus-visible,
.ue-dropdown-btn:focus-visible,
.ue-dropdown-trigger:focus-visible,
.ue-modal-btn:focus-visible,
.ue-input:focus-visible,
.ue-btn:focus-visible,
.ue-theme-card:focus-visible {
  outline: 2px solid var(--ue-primary, #6366f1) !important;
  outline-offset: 2px !important;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.3) !important;
  z-index: 10;
}

/* High contrast mode / prefers-contrast support */
@media (prefers-contrast: more) {
  .ue-toolbar-btn:focus-visible,
  .ue-dropdown-btn:focus-visible,
  .ue-btn:focus-visible {
    outline: 3px solid #ffffff !important;
    outline-offset: 3px !important;
  }
}

/* Scrollable Toolbar for Responsive & Mobile Viewports */
.ue-toolbar-scrollable {
  overflow-x: auto !important;
  overflow-y: hidden !important;
  -webkit-overflow-scrolling: touch !important;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
  flex-wrap: nowrap !important;
  padding: 6px 8px;
  touch-action: pan-x;
}

.ue-toolbar-scrollable::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

/* Touch Device Target Sizing (WCAG 2.5.5 / 2.5.8 min 44x44px touch targets) */
.ue-touch-device .ue-toolbar-btn,
.ue-mobile-view .ue-toolbar-btn,
.ue-touch-device .ue-dropdown-btn,
.ue-mobile-view .ue-dropdown-btn {
  min-width: 44px;
  min-height: 44px;
  padding: 10px;
  touch-action: manipulation;
}

.ue-touch-device .ue-dropdown-trigger,
.ue-mobile-view .ue-dropdown-trigger {
  min-height: 44px;
  padding: 8px 12px;
}

/* Mobile Viewport adaptations (< 768px) */
.ue-mobile-view {
  font-size: 16px; /* Prevents auto-zoom on iOS Safari when tapping inputs */
}

.ue-mobile-view .ue-content {
  padding: 12px 14px;
  font-size: 15px;
}

/* Mobile Bottom Sheet Toolbar Mode */
.ue-bottom-sheet {
  position: relative;
  display: flex;
  flex-direction: column;
}

.ue-bottom-sheet .ue-toolbar {
  order: 2; /* Move toolbar below content on mobile bottom sheet */
  border-top: 1px solid var(--editor-border, var(--ue-toolbar-border));
  border-bottom: none;
  position: sticky;
  bottom: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: var(--editor-toolbar-bg, rgba(15, 23, 42, 0.95));
}

.ue-bottom-sheet .ue-editor-content,
.ue-bottom-sheet .ue-content {
  order: 1;
}

/* Virtual Keyboard Open state adjustment */
.ue-vk-open .ue-toolbar {
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.3);
}

/* Reduced Motion preferences (WCAG 2.1) */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}