:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --bg-surface: rgba(30, 41, 59, 0.85);
  --accent-color: #6366f1;
  --accent-hover: #4f46e5;
  --primary-color: var(--accent-color);
  --bg-hover: var(--bg-card-hover);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #334155;
  --sidebar-width: 280px;
  --header-height: 64px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
  --transition-fast: 0.2s ease;
  --link-color: #818cf8;
  --link-hover: #a5b4fc;
  --link-visited: #c084fc;
  --scrollbar-thumb: rgba(148, 163, 184, 0.22);
  --scrollbar-thumb-hover: rgba(148, 163, 184, 0.45);
  --scrollbar-track: transparent;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-surface: rgba(255, 255, 255, 0.88);
  --accent-color: #4f46e5;
  --accent-hover: #4338ca;
  --primary-color: var(--accent-color);
  --bg-hover: var(--bg-card-hover);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --link-color: #4f46e5;
  --link-hover: #3730a3;
  --link-visited: #7c3aed;
  --scrollbar-thumb: rgba(100, 116, 139, 0.22);
  --scrollbar-thumb-hover: rgba(100, 116, 139, 0.45);
  --scrollbar-track: transparent;
}

/* Global Subtle Scrollbars */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

::-webkit-scrollbar-corner {
  background: transparent;
}

html, body {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  flex-shrink: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-logo {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  border-color: var(--border-color);
  color: var(--text-primary);
  background: transparent;
}

.btn-outline:hover {
  background: var(--bg-card-hover);
}

.btn-danger-text {
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.3);
}

.btn-danger-text:hover {
  background: rgba(239, 68, 68, 0.15);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

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

.dropdown-menu {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 0.5rem;
  background-color: var(--bg-card);
  width: 230px;
  min-width: 220px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  z-index: 1000;
  padding: 0.35rem 0;
  box-sizing: border-box;
}

.dropdown-menu.show {
  display: flex;
  flex-direction: column;
}

.dropdown-user-header {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  background: var(--bg-secondary);
  border-top-left-radius: calc(var(--radius-md) - 1px);
  border-top-right-radius: calc(var(--radius-md) - 1px);
}

.dropdown-user-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.dropdown-user-name {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dropdown-user-role {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dropdown-header {
  padding: 0.5rem 1rem 0.25rem 1rem;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  user-select: none;
}

.dropdown-item {
  background: none;
  border: none;
  padding: 0.45rem 1rem;
  width: 100%;
  text-align: left;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: inherit;
  transition: background var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  box-sizing: border-box;
  white-space: nowrap;
}

.dropdown-item:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}

.dropdown-item-icon {
  width: 1.25rem;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.dropdown-item-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dropdown-item.text-danger {
  color: #f87171;
}

.dropdown-item.text-danger:hover {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 0.35rem 0;
}

/* Layout */
.app-container {
  display: flex;
  flex: 1;
  height: calc(100vh - var(--header-height));
  height: calc(100dvh - var(--header-height));
  overflow: hidden;
}

/* Sidebar */
.app-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
  z-index: 90;
}

.sidebar-resizer {
  position: absolute;
  top: 0;
  right: 0;
  width: 6px;
  height: 100%;
  cursor: col-resize;
  z-index: 10;
  user-select: none;
  transition: background var(--transition-fast);
}

.sidebar-resizer:hover, .sidebar-resizer.resizing {
  background: var(--accent-color);
}

.sidebar-search {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.sidebar-search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.search-input {
  width: 100%;
  padding: 0.6rem 2.2rem 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.875rem;
  box-sizing: border-box;
}

.search-input:focus {
  outline: 2px solid var(--accent-color);
}

.sidebar-search-clear {
  position: absolute;
  right: 0.45rem;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 1.5rem;
  height: 1.5rem;
  padding: 0;
  display: none;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.sidebar-search-clear:hover {
  color: var(--text-primary);
  background-color: var(--bg-hover);
}

.sidebar-search-clear:focus-visible {
  outline: 2px solid var(--accent-color);
  color: var(--text-primary);
}

/* Sidebar Content Authoring Actions (Notion/Linear Pattern) */
.sidebar-actions {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-shrink: 0;
  background: var(--bg-secondary);
}

.btn-sidebar-add-doc {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background-color: var(--accent-color);
  color: #fff;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
  font-family: inherit;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.btn-sidebar-add-doc:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
}

.btn-sidebar-add-doc:active {
  transform: translateY(0);
}

.btn-sidebar-add-cat {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  background-color: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  font-family: inherit;
}

.btn-sidebar-add-cat:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--accent-color);
  transform: translateY(-1px);
}

.btn-sidebar-add-cat:active {
  transform: translateY(0);
}

.sidebar-nav {
  padding: 1rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  overflow-y: auto;
}

.sidebar-footer {
  padding: 0.65rem 1rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.qwiki-powered-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  opacity: 0.8;
  user-select: none;
}

.qwiki-powered-badge strong {
  color: var(--text-secondary);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.qwiki-powered-badge .badge-icon {
  font-size: 0.85rem;
  line-height: 1;
}

.qwiki-powered-badge .badge-external-icon {
  opacity: 0.5;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  flex-shrink: 0;
}

.qwiki-powered-badge:hover {
  opacity: 1;
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.qwiki-powered-badge:hover strong {
  color: var(--accent-color);
}

.qwiki-powered-badge:hover .badge-external-icon {
  opacity: 1;
  transform: translate(1px, -1px);
}

/* Accordion Navigation & Indentation */
.nav-category-item {
  display: flex;
  flex-direction: column;
}

/* Align nested folders exactly with documents */
.nav-document-list .nav-category-header {
  padding: 0.65rem 0.85rem;
}

.nav-category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.25rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-category-header:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.chevron-icon {
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
  display: inline-block;
}

.header-actions-inline {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.drag-handle {
  cursor: grab;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-right: 0.35rem;
  user-select: none;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

.drag-handle:hover {
  opacity: 1;
  color: var(--accent-color);
}

.dragging {
  opacity: 0.4;
}

.drag-over-above {
  border-top: 2px solid var(--accent-color) !important;
}

.drag-over-below {
  border-bottom: 2px solid var(--accent-color) !important;
}

.drag-over-inside {
  background: rgba(99, 102, 241, 0.2) !important;
  border-radius: var(--radius-sm);
}

.btn-edit-cat-icon {
  background: none;
  border: none;
  font-size: 0.75rem;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

.btn-edit-cat-icon:hover {
  opacity: 1;
}

.nav-category-item.collapsed .chevron-icon {
  transform: rotate(-90deg);
}

.nav-category-item.collapsed .nav-document-list {
  display: none;
}

.nav-document-list {
  display: flex;
  flex-direction: column;
  padding-left: 0.75rem;
  border-left: 2px solid var(--border-color);
  margin-left: 1.25rem;
  margin-top: 0.25rem;
  margin-bottom: 0.5rem;
}

.nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 400;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.nav-link.active {
  color: var(--accent-color);
  font-weight: 600;
  background: rgba(99, 102, 241, 0.12);
}

.doc-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  padding: 0.25rem 0.45rem;
  border-radius: 4px;
  text-transform: uppercase;
  font-weight: 600;
  line-height: 1;
  transition: transform 0.15s ease, background 0.15s ease;
}

.doc-badge:hover {
  transform: scale(1.1);
}

.doc-badge-svg {
  display: inline-block;
  vertical-align: middle;
}

.badge-md, .badge-markdown { background: rgba(59, 130, 246, 0.18); color: #60a5fa; }
.badge-gdoc { background: rgba(16, 185, 129, 0.18); color: #34d399; }
.badge-pdf { background: rgba(239, 68, 68, 0.18); color: #f87171; }
.badge-link { background: rgba(147, 51, 234, 0.18); color: #c084fc; }
.badge-internal-link { background: rgba(59, 130, 246, 0.18); color: #60a5fa; }
.badge-remote { background: rgba(20, 184, 166, 0.18); color: #2dd4bf; }

.btn-edit-link-icon {
  background: none;
  border: none;
  font-size: 0.75rem;
  cursor: pointer;
  opacity: 0.6;
  padding: 0;
  margin: 0;
  transition: opacity var(--transition-fast);
}

.btn-edit-link-icon:hover {
  opacity: 1;
}

.nav-link-actions-container {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* Top-level navigation link in sidebar (perfectly aligned with category headers) */
.sidebar-nav > .nav-link,
.nav-link.nav-top-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.25rem;
  margin: 0;
  border-radius: 0;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.sidebar-nav > .nav-link:hover,
.nav-link.nav-top-link:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.sidebar-nav > .nav-link .drag-handle,
.nav-link.nav-top-link .drag-handle {
  font-size: 0.9rem;
  margin-right: 0.35rem;
}

.top-link-icon {
  margin-right: 0;
  font-size: inherit;
  display: inline;
}

/* Main Content Area */
.app-content {
  --content-padding-top: 2rem;
  flex: 1;
  padding: var(--content-padding-top) 3rem 4rem 3rem;
  overflow-y: auto;
  scroll-behavior: smooth;
  max-width: 1000px;
}

.content-header {
  position: sticky;
  top: calc(-1 * var(--content-padding-top, 2rem));
  z-index: 35;
  background-color: var(--bg-primary);
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Sticky Document Editor Toolbar & Edit Actions in Markdown Edit Mode */
.app-content.is-editing-doc .content-header {
  position: sticky;
  top: calc(-1 * var(--content-padding-top, 2rem));
  z-index: 35;
  background-color: var(--bg-primary);
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

#inline-editor-container .toastui-editor-defaultUI {
  overflow: visible !important;
}

#inline-editor-container .toastui-editor-toolbar {
  position: sticky !important;
  top: calc(-1 * var(--content-padding-top, 2rem) + var(--edit-header-height, 52px)) !important;
  z-index: 30 !important;
  background-color: var(--bg-card) !important;
  border-bottom: 1px solid var(--border-color) !important;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] #inline-editor-container .toastui-editor-toolbar,
[data-theme="dark"] #inline-editor-container .toastui-editor-defaultUI-toolbar {
  background-color: var(--bg-card, #1e293b) !important;
  border-bottom: 1px solid var(--border-color, #334155) !important;
}

.toastui-editor-popup {
  z-index: 50 !important;
}

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

.breadcrumbs a {
  color: var(--text-secondary);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--accent-color);
}

.content-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.content-body {
  line-height: 1.8;
  font-size: 1.05rem;
}

.content-body > *:first-child {
  margin-top: 0 !important;
}

.content-body h1 {
  font-size: 2rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.3;
}

.content-body h2 {
  font-size: 1.5rem;
  margin-top: 1.85rem;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
}

.content-body h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  font-weight: 600;
}

.content-body h4, .content-body h5, .content-body h6 {
  font-size: 1.1rem;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 600;
}

.content-body h1,
.content-body h2,
.content-body h3,
.content-body h4,
.content-body h5,
.content-body h6,
.content-body [id] {
  scroll-margin-top: calc(var(--content-padding-top, 2rem) + 1.5rem);
}

/* Document Content Hyperlinks & Anchors */
.content-body a[href]:not(.btn) {
  color: var(--link-color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(129, 140, 248, 0.45);
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

[data-theme="light"] .content-body a[href]:not(.btn) {
  text-decoration-color: rgba(79, 70, 229, 0.4);
}

.content-body a[href]:not(.btn):visited {
  color: var(--link-visited);
  text-decoration-color: rgba(192, 132, 252, 0.45);
}

[data-theme="light"] .content-body a[href]:not(.btn):visited {
  text-decoration-color: rgba(124, 58, 237, 0.4);
}

.content-body a[href]:not(.btn):hover {
  color: var(--link-hover);
  text-decoration-color: currentColor;
  text-decoration-thickness: 2px;
}

.content-body a[href]:not(.btn):focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.content-body p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

/* Lists Alignment */
.content-body ul, .content-body ol {
  padding-left: 1.75rem;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.content-body li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

.content-body li > ul, .content-body li > ol {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.content-body blockquote {
  border-left: 4px solid var(--accent-color);
  background: var(--bg-secondary);
  padding: 0.85rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}

.content-body blockquote p {
  margin-bottom: 0;
}

/* Tables Styling */
.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  margin-bottom: 1.75rem;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.content-body th, .content-body td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.content-body th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
}

.content-body tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.content-body hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}

.content-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 1.25rem 0;
  border: 1px solid var(--border-color);
}

.content-body code {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.content-body pre {
  background: #0d1117;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  line-height: 1.35;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.content-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: #e6edf3;
  line-height: inherit;
  font-family: inherit;
}

/* Diagrams & Visual Flowcharts */
.mermaid-diagram-container,
.svgbob-diagram-container {
  display: block;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  text-align: center;
}

.mermaid-diagram-container .mermaid {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 100%;
  width: max-content;
}

/* Prevent wide diagrams from shrinking: retain natural dimensions and allow horizontal scrolling */
.mermaid-diagram-container .mermaid svg {
  min-width: 0;
  max-width: none !important;
  height: auto;
  flex-shrink: 0;
}

.svgbob-diagram-container svg {
  min-width: 0;
  max-width: none;
  height: auto;
  display: inline-block;
  margin: 0 auto;
}

/* Svgbob dark & light mode styling */
[data-theme="dark"] .svgbob-diagram-container svg text {
  fill: #e2e8f0 !important;
}
[data-theme="dark"] .svgbob-diagram-container svg path,
[data-theme="dark"] .svgbob-diagram-container svg line,
[data-theme="dark"] .svgbob-diagram-container svg rect,
[data-theme="dark"] .svgbob-diagram-container svg polygon,
[data-theme="dark"] .svgbob-diagram-container svg circle {
  stroke: #94a3b8 !important;
}
[data-theme="dark"] .svgbob-diagram-container svg marker path {
  fill: #94a3b8 !important;
  stroke: none !important;
}

[data-theme="light"] .svgbob-diagram-container svg text {
  fill: #1e293b !important;
}
[data-theme="light"] .svgbob-diagram-container svg path,
[data-theme="light"] .svgbob-diagram-container svg line,
[data-theme="light"] .svgbob-diagram-container svg rect,
[data-theme="light"] .svgbob-diagram-container svg polygon,
[data-theme="light"] .svgbob-diagram-container svg circle {
  stroke: #475569 !important;
}
[data-theme="light"] .svgbob-diagram-container svg marker path {
  fill: #475569 !important;
  stroke: none !important;
}

/* LaTeX / KaTeX Mathematical Expressions */
.katex-display-block {
  margin: 1.25rem 0;
  padding: 0.5rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  text-align: center;
  max-width: 100%;
}

.katex-display-block .katex-display {
  margin: 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.katex-inline,
.katex-display-inline,
.math-symbol-unicode {
  display: inline;
}

.content-body .katex {
  color: inherit;
  font-size: 1.05em;
}

.content-body .katex-display {
  margin: 1rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.25rem 0;
}

.pdf-viewer-container {
  width: 100%;
  height: 800px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.pdf-viewer-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Responsive Video Embeds & Players */
.qwiki-video-wrapper {
  margin: 1.5rem 0;
  width: 100%;
}

.qwiki-video-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.qwiki-video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.content-body video,
.qwiki-video-player {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: #000;
  display: block;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.qwiki-video-caption {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Modals & Tabbed Forms */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(5px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.open {
  display: flex;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  padding: 2rem;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.tab-header {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.6rem 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.tab-btn.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
  font-weight: 600;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-control:focus {
  outline: 2px solid var(--accent-color);
}

textarea.form-control {
  min-height: 250px;
  font-family: monospace;
  resize: vertical;
}

/* Table of Contents */
.app-toc {
  display: none;
  width: 250px;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-color);
  padding: 1.5rem;
  overflow-y: auto;
  flex-shrink: 0;
  flex-direction: column;
}

.app-toc.show {
  display: flex;
}

.toc-nav-buttons {
  position: sticky;
  top: -1.5rem;
  z-index: 20;
  background: var(--bg-primary);
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 1.5rem;
  padding-bottom: 0.75rem;
  margin-top: -1.5rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.toc-header {
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.toc-content ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-content ul ul {
  padding-left: 1rem;
  display: none;
}

.toc-content ul ul.expanded {
  display: block;
}

.toc-content li {
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  line-height: 1.4;
}

.toc-link-container {
  display: flex;
  align-items: flex-start;
}

.toc-toggle {
  cursor: pointer;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 4px;
  color: var(--text-muted);
  transition: transform 0.2s ease;
  user-select: none;
  font-size: 0.7rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.toc-toggle.expanded {
  transform: rotate(90deg);
}

.toc-toggle.empty {
  visibility: hidden;
}

.toc-link {
  color: var(--text-secondary);
  text-decoration: none;
  display: block;
  padding: 0.1rem 0;
  transition: color var(--transition-fast);
  flex: 1;
}

.toc-link:hover {
  color: var(--accent-color);
}

.toc-link.active {
  color: var(--accent-color);
  font-weight: 600;
}

@media (max-width: 1200px) {
  .app-toc, .app-toc.show {
    display: none;
  }
}

@media (max-width: 768px) {
  .app-sidebar {
    position: fixed;
    left: -100%;
    z-index: 99;
    transition: left 0.3s ease;
  }
  .app-sidebar.open {
    left: 0;
  }
  .mobile-toggle {
    display: block;
  }
  .app-content {
    --content-padding-top: 1.5rem;
    padding: var(--content-padding-top) 1rem 6rem 1rem;
    padding-bottom: calc(6rem + env(safe-area-inset-bottom, 0px));
  }
  .content-body {
    padding-bottom: 2rem;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    /* Hide UI elements */
    .app-header,
    .app-sidebar,
    .app-toc,
    .content-actions,
    .breadcrumbs,
    .mobile-toggle,
    .toc-nav-buttons,
    .share-floating-bar,
    .share-floating-bar *,
    .share-status-badge,
    .modal-overlay {
        display: none !important;
    }

    /* Reset layout for printing */
    html, body, .app-container {
        display: block !important;
        height: auto !important;
        overflow: visible !important;
        position: static !important;
    }

    .app-content {
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
        max-width: none !important;
        overflow: visible !important;
        background-color: transparent !important;
        color: #000 !important;
        height: auto !important;
    }

    /* Full-Screen Mode Print Overrides */
    body.mode-fullscreen,
    body.mode-fullscreen .app-container,
    body.mode-fullscreen .app-content {
        display: block !important;
        height: auto !important;
        min-height: 0 !important;
        overflow: visible !important;
        padding: 0 !important;
        margin: 0 !important;
        position: static !important;
        width: 100% !important;
        max-width: none !important;
    }

    /* Reset background and colors to save ink */
    body {
        background-color: #fff !important;
        color: #000 !important;
    }
    
    .content-body {
        background-color: #fff !important;
        color: #000 !important;
    }

    /* Handle page breaks */
    h1, h2, h3 {
        page-break-after: avoid;
    }
    
    img {
        max-width: 100% !important;
        page-break-inside: avoid;
    }

    pre, blockquote {
        page-break-inside: avoid;
        border: 1px solid #ccc;
    }
}

/* ==========================================================================
   Full-Screen / Share Reader Mode
   ========================================================================== */
html.mode-fullscreen {
    height: auto !important;
    min-height: 100% !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
}

body.mode-fullscreen {
    display: block !important;
    height: auto !important;
    min-height: 100vh !important;
    overflow: visible !important;
    position: static !important;
}

body.mode-fullscreen .app-header,
body.mode-fullscreen .app-sidebar,
body.mode-fullscreen .sidebar-resizer,
body.mode-fullscreen .app-toc {
    display: none !important;
}

body.mode-fullscreen .app-container {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    min-height: 100vh !important;
    overflow: visible !important;
    padding-top: 5rem !important;
    position: static !important;
}

body.mode-fullscreen .app-content {
    display: block !important;
    max-width: 880px !important;
    margin: 0 auto !important;
    padding: 1rem 1.5rem 6rem 1.5rem !important;
    padding-bottom: calc(6rem + env(safe-area-inset-bottom, 0px)) !important;
    width: 100% !important;
    height: auto !important;
    overflow: visible !important;
}

/* Document Type Specific Enhancements in Full-Screen Mode */
body.mode-fullscreen .pdf-viewer-container {
    height: calc(100vh - 160px);
    min-height: 600px;
}

body.mode-fullscreen .html-viewer-frame {
    height: calc(100vh - 160px);
    min-height: 600px;
}

body.mode-fullscreen .gdoc-container iframe {
    height: calc(100vh - 160px) !important;
    min-height: 600px;
}

.share-floating-bar {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: calc(100% - 2rem);
    max-width: 880px;
    padding: 0.5rem 1rem;
    background: var(--bg-surface, rgba(30, 41, 59, 0.85));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color, rgba(255, 255, 255, 0.1));
    border-radius: 9999px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

[data-theme="light"] .share-floating-bar {
    background: var(--bg-surface, rgba(255, 255, 255, 0.88));
    border-color: var(--border-color, #e2e8f0);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.04);
}

.share-bar-brand {
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-primary);
    white-space: nowrap;
}

.share-bar-brand a {
    color: inherit;
    text-decoration: none;
}

.share-bar-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
    flex: 1;
}

.share-bar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.share-bar-actions .btn {
    border-radius: 9999px;
    background: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.share-bar-actions .btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.share-bar-actions .btn svg {
    stroke: currentColor;
}

.share-bar-actions .dropdown-menu {
    width: auto;
    min-width: 175px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .share-bar-actions .dropdown-menu {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

@media (max-width: 640px) {
    .share-bar-title {
        display: none;
    }
}

.share-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.82rem;
    font-weight: 500;
}
.share-status-public {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}
.share-status-restricted {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Subwiki Management and Navigation */
.subwiki-parent-banner {
  margin: 0.5rem 0.75rem 0.25rem;
  padding: 0.55rem 0.75rem;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

[data-theme="light"] .subwiki-parent-banner {
  background: var(--bg-card-hover);
}

.subwiki-parent-banner:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-color);
}

[data-theme="light"] .subwiki-parent-banner:hover {
  background: #e2e8f0;
}

.subwiki-parent-banner a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.subwiki-parent-banner a:hover {
  color: var(--accent-hover);
}

.subwiki-table thead tr {
  background: var(--bg-primary);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

[data-theme="light"] .subwiki-table thead tr {
  background: var(--bg-card-hover);
}

.subwiki-table th {
  padding: 0.6rem 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.82rem;
}

/* Subwikis Accordion Group in Sidebar */
.nav-subwikis-group {
  margin-top: 0.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 0.5rem;
}

.nav-subwiki-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
}

.nav-subwiki-link .subwiki-item-icon {
  margin-right: 0.35rem;
  font-size: 0.9rem;
}

.badge-subwiki-count {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.18rem 0.45rem;
  border-radius: 9999px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-color);
  line-height: 1;
  white-space: nowrap;
}

[data-theme="light"] .badge-subwiki-count {
  background: #e0e7ff;
  color: #4338ca;
}