/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.app-layout {
  display: flex;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-secondary);
  color: var(--color-surface);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  transition: width 0.2s ease;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed);
}

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

.sidebar-logo {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.sidebar-section {
  padding: var(--space-sm) var(--space-md);
}

.sidebar-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-sm);
}

.sidebar-item {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
}

.sidebar-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-surface);
}

.sidebar-item.active {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-surface);
}

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

/* Toolbar */
/* Menu bar (Document | Edit | View | Insert | Format) */
.menu-bar {
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  height: 28px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  gap: 0;
  flex-shrink: 0;
}
.menu-bar-item-wrapper {
  position: relative;
}
.menu-bar-item {
  padding: 2px 10px;
  border: none;
  background: transparent;
  font-size: 13px;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.menu-bar-item:hover,
.menu-bar-item.open {
  background: var(--color-mist);
  color: var(--color-text);
}
.menu-bar-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 99;
}
.menu-bar-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 100;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 0;
  min-width: 200px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
}
.menu-bar-action {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 5px 12px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text);
  text-align: left;
}
.menu-bar-action:hover {
  background: var(--color-mist);
}
.menu-bar-action-label {
  flex: 1;
}
.menu-bar-action-shortcut {
  font-size: 11px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  margin-left: 16px;
}
.menu-bar-action-icon {
  width: 22px;
  text-align: center;
  font-weight: 700;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  font-size: 13px;
}
.menu-bar-action-arrow {
  color: var(--color-text-secondary);
  font-size: 10px;
  margin-left: auto;
}
.menu-bar-action-disabled {
  opacity: 0.4;
  cursor: default;
  display: flex;
  align-items: center;
  width: 100%;
  padding: 5px 12px;
  border: none;
  background: transparent;
  font-size: 13px;
  color: var(--color-text);
  text-align: left;
}
.menu-bar-action-check {
  width: 18px;
  text-align: center;
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}
.menu-bar-action-label-toggle {
  color: var(--color-primary);
}
.menu-bar-sep {
  height: 1px;
  background: var(--color-border);
  margin: 4px 8px;
}

.toolbar {
  height: var(--toolbar-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  gap: var(--space-xs);
  flex-shrink: 0;
}

.toolbar-group {
  display: flex;
  gap: 2px;
}

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

.toolbar-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.toolbar-btn:hover {
  background: var(--color-mist);
  color: var(--color-text);
}

.toolbar-btn.active {
  background: var(--color-primary);
  color: var(--color-surface);
}

.toolbar-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

.toolbar-btn-wide {
  width: auto;
  padding: 0 12px;
  gap: 4px;
  font-size: 12px;
}

.toolbar-block-dropdown-wrapper {
  position: relative;
}

.toolbar-block-dropdown-btn {
  height: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 12px;
  font-weight: 600;
  padding: 0 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.toolbar-block-dropdown-btn:hover {
  border-color: var(--color-text-secondary);
}
.toolbar-block-icon {
  font-weight: 700;
  min-width: 20px;
  text-align: center;
}
.toolbar-block-arrow {
  font-size: 10px;
  color: var(--color-text-secondary);
}

.toolbar-block-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 100;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 0;
  min-width: 240px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
}
.toolbar-block-menu-item {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 6px 12px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text);
  gap: 10px;
  text-align: left;
}
.toolbar-block-menu-item:hover {
  background: var(--color-mist);
}
.toolbar-block-menu-icon {
  font-weight: 700;
  min-width: 24px;
  text-align: center;
  color: var(--color-text-secondary);
}
.toolbar-block-menu-label {
  flex: 1;
}
.toolbar-block-menu-shortcut {
  font-size: 11px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}
.toolbar-block-menu-sep {
  height: 1px;
  background: var(--color-border);
  margin: 4px 8px;
}

.toolbar-label {
  font-size: 11px;
  color: var(--color-text-secondary);
  font-weight: 600;
  padding: 0 4px;
  align-self: center;
  white-space: nowrap;
}

.toolbar-color-wrapper {
  position: relative;
  display: inline-flex;
}

.toolbar-color-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
}

.toolbar-color-picker {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 100;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  width: 160px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.toolbar-color-swatch {
  width: 24px;
  height: 24px;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  cursor: pointer;
  padding: 0;
}
.toolbar-color-swatch:hover {
  transform: scale(1.15);
}

.toolbar-color-remove {
  width: 24px;
  height: 24px;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  cursor: pointer;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.toolbar-color-remove:hover {
  background: var(--color-mist);
}

/* File browser */
.file-browser {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.breadcrumb-link {
  color: var(--color-link);
  cursor: pointer;
  text-decoration: none;
}

.breadcrumb-link:hover {
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--color-text-secondary);
}

.file-list {
  width: 100%;
  border-collapse: collapse;
}

.file-list th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-secondary);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  user-select: none;
}

.file-list td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
}

.file-list tr:hover td {
  background: var(--color-mist);
}

.file-list .file-name {
  cursor: pointer;
  color: var(--color-text);
  font-weight: 500;
}

.file-list .file-name:hover {
  color: var(--color-link);
}

.file-list .file-icon {
  width: 20px;
  display: inline-block;
  margin-right: var(--space-sm);
}

.file-list .file-date {
  color: var(--color-text-secondary);
}

/* Action bar */
.action-bar {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}

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

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

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

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

/* Editor area */
.editor-container {
  flex: 1;
  overflow-y: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: var(--space-xl) var(--space-lg);
  background: var(--color-bg);
}

.editor-content {
  width: 100%;
  max-width: var(--content-max-width);
  min-height: 100%;
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  font-family: var(--font-doc-body);
  font-size: 16px;
  line-height: 1.6;
  outline: none;
  box-sizing: border-box;
}

.editor-content:empty::before {
  content: "Start typing...";
  color: var(--color-text-secondary);
  pointer-events: none;
}

.editor-content h1 {
  font-family: var(--font-doc-heading);
  font-size: 28px;
  font-weight: 700;
  margin: 24px 0 8px;
  line-height: 1.3;
}

.editor-content h2 {
  font-family: var(--font-doc-heading);
  font-size: 22px;
  font-weight: 600;
  margin: 20px 0 8px;
  line-height: 1.3;
}

.editor-content h3 {
  font-family: var(--font-doc-heading);
  font-size: 18px;
  font-weight: 600;
  margin: 16px 0 8px;
  line-height: 1.3;
}

.editor-content > :first-child {
  margin-top: 0;
}

.editor-content p {
  margin: 0 0 8px;
}

.editor-content ul, .editor-content ol {
  margin: 0 0 8px;
  padding-left: 24px;
}

.editor-content li {
  margin: 2px 0;
}

.editor-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-md);
  margin: 8px 0;
  color: var(--color-text-secondary);
}

.editor-content pre {
  background: #1a1a1a;
  color: #e0e0e0;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin: 8px 0;
  font-family: var(--font-mono);
  font-size: 14px;
  overflow-x: auto;
}

.editor-content code {
  background: var(--color-mist);
  padding: 2px 4px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.editor-content pre code {
  background: transparent;
  padding: 0;
}

.editor-content hr {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: 16px 0;
}

.editor-content img {
  max-width: 100%;
  border-radius: var(--radius-md);
}

/* Selection and cursor */
.editor-content ::selection {
  background: rgba(45, 95, 45, 0.2);
}

.editor-content:focus {
  outline: none;
}

/* Inline formatting */
.editor-content strong {
  font-weight: 700;
}

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

.editor-content u {
  text-decoration: underline;
}

.editor-content s {
  text-decoration: line-through;
}

.editor-content a {
  color: var(--color-link);
  text-decoration: underline;
  cursor: pointer;
}

.editor-content a:hover {
  text-decoration: none;
}

/* Task list */
.editor-content ul[data-type="taskList"] {
  list-style: none;
  padding-left: 4px;
}

.editor-content li[data-type="taskItem"] {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.editor-content li[data-type="taskItem"]::before {
  content: "";
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-text-secondary);
  border-radius: 3px;
  flex-shrink: 0;
  margin-top: 3px;
}

.editor-content li[data-type="taskItem"][data-checked="true"]::before {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* Tables */
.editor-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  table-layout: fixed;
}

.editor-content th,
.editor-content td {
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  vertical-align: top;
  min-width: 80px;
}

.editor-content th {
  background: var(--color-mist);
  font-weight: 600;
  text-align: left;
}

.editor-content td p,
.editor-content th p {
  margin: 0;
}

.editor-content td p + p,
.editor-content th p + p {
  margin-top: 4px;
}

/* Selection toolbar — floating above text selection */
.selection-toolbar {
  position: fixed;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--color-surface, #1a1a1a);
  border-radius: 6px;
  padding: 4px 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  pointer-events: auto;
}

.selection-toolbar-btn {
  background: none;
  border: none;
  color: var(--color-surface-text, #e0e0e0);
  font-size: 16px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  line-height: 1;
}

.selection-toolbar-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Comment highlight — overlays commented text with warm background */
.comment-highlight {
  position: fixed;
  background: rgba(210, 150, 60, 0.25);
  border-radius: 2px;
  cursor: pointer;
  pointer-events: auto;
  z-index: 5;
  transition: background 0.15s;
}

.comment-highlight:hover {
  background: rgba(210, 150, 60, 0.4);
}

/* Comment bubble — numbered icon in the left margin */
.comment-bubble {
  position: fixed;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 2px;
  cursor: pointer;
  font-size: 14px;
  opacity: 0.6;
  transition: opacity 0.15s;
}

.comment-bubble:hover {
  opacity: 1;
}

.comment-bubble-icon {
  font-size: 16px;
}

.comment-bubble-count {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* Comment bubble — appears on hover in the right margin of commentable blocks */
.editor-content [data-block-id] {
  position: relative;
}

.editor-content [data-block-id]:hover::after {
  content: "\1F4AC";
  position: absolute;
  right: -32px;
  top: 2px;
  font-size: 14px;
  opacity: 0.4;
  cursor: pointer;
  transition: opacity 0.15s;
}

.editor-content [data-block-id]:hover::after:hover {
  opacity: 1;
}

/* Horizontal rule */
.editor-content hr {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: 16px 0;
  cursor: pointer;
}

.editor-content hr:focus,
.editor-content hr.selected {
  border-color: var(--color-primary);
}

/* Login page */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: var(--color-bg);
}

.login-card {
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  text-align: center;
  max-width: 360px;
  width: 100%;
}

.login-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.login-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.login-btn {
  width: 100%;
  padding: var(--space-md);
  background: var(--color-text);
  color: var(--color-surface);
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.login-btn:hover {
  opacity: 0.9;
}

/* Document page header */
.doc-header {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.doc-title {
  font-size: 16px;
  font-weight: 600;
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  padding: var(--space-xs);
}

.doc-title:focus {
  background: var(--color-mist);
  border-radius: var(--radius-sm);
}

.doc-title-editable {
  cursor: text;
}

.doc-title-editable:hover {
  background: var(--color-mist);
  border-radius: var(--radius-sm);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-secondary);
}

.empty-state-text {
  font-size: 14px;
  margin-bottom: var(--space-md);
}

/* ─── Document Outline ──────────────────────────────────────── */

.document-outline {
  width: 220px;
  min-width: 180px;
  border-left: 1px solid var(--color-border);
  padding: var(--space-md);
  overflow-y: auto;
  flex-shrink: 0;
}

.outline-header {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.outline-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.outline-item {
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.outline-item:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.outline-h1 { padding-left: 8px; font-weight: 600; }
.outline-h2 { padding-left: 20px; }
.outline-h3 { padding-left: 32px; font-size: 12px; }

.outline-empty {
  font-size: 12px;
  color: var(--color-text-tertiary);
  padding: var(--space-sm);
}

/* ─── Share Button & Dialog ─────────────────────────────────── */

.share-button {
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  margin-left: auto;
}

.share-button:hover {
  opacity: 0.9;
}

.share-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.share-dialog {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  width: 480px;
  max-width: 90vw;
}

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

.share-header h3 {
  margin: 0;
  font-size: 16px;
}

.share-close {
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: 4px;
}

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

.share-input-row {
  display: flex;
  gap: var(--space-sm);
}

.share-email-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
}

.share-level-select {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: var(--color-bg);
}

.share-btn {
  padding: 8px 16px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.share-status {
  margin-top: var(--space-md);
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* Editor + side panels row */
.editor-with-panels {
  flex: 1;
  display: flex;
  flex-direction: row;
  overflow: hidden;
}

.editor-with-panels .editor-container {
  flex: 1;
  overflow-y: auto;
}

/* ─── Conversation Pane ─────────────────────────────────────── */

.conversation-pane {
  width: 280px;
  min-width: 240px;
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  background: var(--color-bg);
}

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

.conversation-header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.comment-nav-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 10px;
  color: var(--color-text-secondary);
  padding: 0;
}

.comment-nav-btn:hover {
  background: var(--color-mist);
  color: var(--color-text);
}

.conversation-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

.conversation-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm);
}

.conversation-empty {
  padding: var(--space-lg);
  text-align: center;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

/* Comment popup — positioned to the left of document content */
.comment-popup-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
}

.comment-popup {
  position: fixed;
  z-index: 100;
  width: 420px;
  max-height: 500px;
  background: var(--color-bg, #fff);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.comment-popup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}

.comment-popup-header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.comment-popup-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

.comment-popup-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 18px;
  color: var(--color-text-secondary);
  padding: 4px;
  line-height: 1;
}

.comment-popup-close:hover {
  color: var(--color-text);
}

.comment-popup-body {
  flex: 1;
  overflow-y: auto;
  min-height: 120px;
  max-height: 320px;
}

.comment-popup-textarea {
  width: 100%;
  min-height: 120px;
  padding: 12px 16px;
  border: none;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text);
  resize: vertical;
  outline: none;
  box-sizing: border-box;
}

.comment-popup-textarea::placeholder {
  color: var(--color-text-tertiary);
}

.comment-popup-messages {
  padding: 12px 16px;
}

.comment-popup-msg {
  margin-bottom: 12px;
}

.comment-popup-msg-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
}

.comment-popup-author {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.comment-popup-time {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.comment-popup-text {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.4;
}

.comment-popup-loading {
  font-size: 13px;
  color: var(--color-text-tertiary);
  padding: 16px;
}

.comment-popup-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.comment-popup-reply-row {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.comment-popup-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  outline: none;
}

.comment-popup-input:focus {
  border-color: var(--color-primary);
}

.comment-popup-send {
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.comment-popup-send:hover {
  opacity: 0.9;
}

.conversation-error {
  padding: var(--space-sm) var(--space-md);
  margin: var(--space-sm);
  background: #FFF3E0;
  border: 1px solid #FFB74D;
  border-radius: 4px;
  font-size: 12px;
  color: #E65100;
  cursor: pointer;
}

.conversation-thread {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
}

.conversation-thread:hover {
  background: var(--color-mist);
}

.conversation-thread.thread-resolved {
  opacity: 0.6;
}

.thread-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 12px;
}

.thread-author {
  font-weight: 600;
  color: var(--color-text);
}

.thread-status {
  color: var(--color-text-secondary);
}

.thread-time {
  color: var(--color-text-tertiary);
  margin-left: auto;
}

.thread-preview {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 2px;
  line-height: 1.4;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.thread-actions {
  display: flex;
  gap: 4px;
  margin-top: 4px;
}

.thread-action-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 11px;
  cursor: pointer;
  color: var(--color-text-secondary);
}

.thread-action-btn:hover {
  background: var(--color-mist);
  color: var(--color-text);
}

.thread-delete-btn:hover {
  color: var(--color-error, #E53935);
  border-color: var(--color-error, #E53935);
}

.thread-content {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.thread-time {
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

.conversation-input {
  padding: var(--space-sm);
  border-top: 1px solid var(--color-border);
}

.conversation-message-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  box-sizing: border-box;
}

/* ─── Chat Panel (Sidebar) ──────────────────────────────────── */

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 6px 12px;
}

.sidebar-section-toggle {
  font-size: 10px;
  opacity: 0.6;
}

.sidebar-section-body {
  padding: 0 12px 8px;
}

.sidebar-empty {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  font-style: italic;
  padding: 4px 0;
}

.chat-list {
  margin-bottom: 8px;
}

.chat-item {
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
}

.chat-item:hover {
  background: rgba(255, 255, 255, 0.1);
}

.chat-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-action-btn {
  background: none;
  border: 1px dashed rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.6);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12px;
  width: 100%;
  text-align: center;
}

.sidebar-action-btn:hover {
  border-color: rgba(255, 255, 255, 0.5);
  color: rgba(255, 255, 255, 0.8);
}

/* ─── Notification Bell ─────────────────────────────────────── */

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

.user-name {
  font-size: 14px;
  color: var(--text-secondary, #666);
  white-space: nowrap;
}

.notification-bell-wrapper {
  position: relative;
}

.notification-bell {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  position: relative;
  padding: 4px 8px;
}

.notification-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--color-error, #e74c3c);
  color: white;
  font-size: 10px;
  font-weight: 700;
  min-width: 16px;
  height: 16px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

.notification-panel {
  position: absolute;
  top: 100%;
  right: 0;
  width: 320px;
  max-height: 400px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  z-index: 100;
  overflow: hidden;
}

.notification-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
  font-weight: 600;
}

.notification-mark-all {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 12px;
  cursor: pointer;
}

.notification-panel-body {
  overflow-y: auto;
  max-height: 350px;
}

.notification-empty {
  padding: var(--space-lg);
  text-align: center;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.notification-item {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
}

.notification-item.unread {
  background: rgba(41, 128, 185, 0.05);
  border-left: 3px solid var(--color-primary);
}

.notification-message {
  color: var(--color-text-secondary);
}

/* ─── Block Menu ────────────────────────────────────────────── */

.block-menu {
  position: absolute;
  left: -40px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  padding: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  z-index: 50;
}

.block-menu-item {
  background: none;
  border: none;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  text-align: center;
  min-width: 28px;
}

.block-menu-item:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.block-menu-divider {
  height: 1px;
  background: var(--color-border);
  margin: 2px 0;
}

/* ─── @ Menu ────────────────────────────────────────────────── */

.at-menu {
  position: fixed;
  width: 280px;
  max-height: 300px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  z-index: 100;
  overflow: hidden;
}

.at-menu-header {
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.at-menu-query {
  font-weight: 600;
  color: var(--color-primary);
}

.at-menu-body {
  overflow-y: auto;
  max-height: 250px;
}

.at-menu-empty {
  padding: 16px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.at-menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 13px;
}

.at-menu-item:hover {
  background: var(--color-bg-hover);
}

.at-menu-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
}

.at-menu-label {
  flex: 1;
}

/* Remote cursor overlay (collaboration presence) */
.remote-cursor-selection {
  position: fixed;
  pointer-events: none;
  z-index: 5;
}

.remote-cursor-caret {
  position: fixed;
  pointer-events: none;
  z-index: 6;
  width: 2px;
  border-left: 2px solid;
}

.remote-cursor-label {
  position: absolute;
  bottom: 100%;
  left: -1px;
  padding: 1px 4px;
  font-size: 11px;
  line-height: 14px;
  color: #fff;
  border-radius: 3px 3px 3px 0;
  white-space: nowrap;
  pointer-events: none;
}

/* ─── Search Dialog ─────────────────────────────────────────── */

.search-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  z-index: 1000;
}

.search-dialog {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  width: 560px;
  max-width: 90vw;
  max-height: 60vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.search-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 16px;
  font-family: var(--font-ui);
  color: var(--color-text);
  outline: none;
}

.search-input::placeholder {
  color: var(--color-text-secondary);
}

.search-shortcut {
  font-size: 11px;
  color: var(--color-text-secondary);
  background: var(--color-mist);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.search-results {
  overflow-y: auto;
  flex: 1;
}

.search-loading,
.search-empty {
  padding: var(--space-lg);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.search-result-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  cursor: pointer;
  border-bottom: 1px solid var(--color-border);
  user-select: none;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--color-mist);
}

.search-result-icon {
  font-size: 18px;
  flex-shrink: 0;
  padding-top: 2px;
}

.search-result-content {
  flex: 1;
  min-width: 0;
}

.search-result-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-snippet {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 2px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-result-snippet b {
  color: var(--color-text);
  font-weight: 600;
}

.search-result-time {
  font-size: 12px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  white-space: nowrap;
  padding-top: 2px;
}