/* ==========================================================================
   REAL ONLINE NOTEPAD — ROUNDED GOOGLE DOCS STYLE DESIGN SYSTEM
   Warm, tactile, human-crafted typography and layout.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Theme Variables & Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Typography */
  --font-ui: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-times: 'Times New Roman', Times, 'Liberation Serif', Georgia, serif;
  --font-arial: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  --font-calibri: Calibri, 'Segoe UI', Candara, 'Bitstream Vera Sans', Optima, sans-serif;
  --font-georgia: Georgia, Cambria, 'Times New Roman', serif;
  --font-courier: 'Courier New', Courier, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-jakarta: 'Plus Jakarta Sans', sans-serif;
  --font-roboto: 'Roboto', sans-serif;
  --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Merriweather', Georgia, Cambria, 'Times New Roman', serif;
  --font-lora: 'Lora', Georgia, serif;
  --font-playfair: 'Playfair Display', Georgia, serif;
  --font-mono: 'JetBrains Mono', Consolas, Monaco, monospace;
  --font-fira: 'Fira Code', Consolas, monospace;
  --font-caveat: 'Caveat', cursive, sans-serif;
  --font-kalam: 'Kalam', cursive, sans-serif;
  --font-dyslexic: 'Comic Sans MS', 'Chalkboard SE', 'Comic Neue', sans-serif;

  --font-active: var(--font-times);
  --font-size-base: 18px;
  --line-height-base: 1.6;
  --doc-max-width: 840px;

  /* Radii */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition-quick: 0.15s cubic-bezier(0.2, 0, 0, 1);
  --transition-smooth: 0.25s cubic-bezier(0.2, 0, 0, 1);
}

/* Warm Paper (Default) — Non-AI, Human, Warm Stationery Aesthetic */
html[data-theme="warm"], :root {
  --bg-app: #f7f6f3;
  --bg-header: #ffffff;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f0eee9;
  --bg-surface-active: #e7e4dc;
  --bg-sheet: #ffffff;
  --border-subtle: #e8e5de;
  --border-focus: #2d5cf6;
  --text-main: #242528;
  --text-muted: #6b6d74;
  --text-soft: #9a9ca4;
  --accent-primary: #2d5cf6;
  --accent-hover: #1e4bd8;
  --accent-subtle: rgba(45, 92, 246, 0.08);
  --danger-color: #e11d48;
  --danger-hover: #be123c;
  --code-bg: #f2f0ea;
  --shadow-sheet: 0 1px 4px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.03);
  --shadow-popup: 0 6px 24px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
}

/* Clean Light */
html[data-theme="light"] {
  --bg-app: #f8fafc;
  --bg-header: #ffffff;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f5f9;
  --bg-surface-active: #e2e8f0;
  --bg-sheet: #ffffff;
  --border-subtle: #e2e8f0;
  --border-focus: #2563eb;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-soft: #94a3b8;
  --accent-primary: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-subtle: rgba(37, 99, 235, 0.08);
  --danger-color: #dc2626;
  --danger-hover: #b91c1c;
  --code-bg: #f1f5f9;
  --shadow-sheet: 0 1px 3px rgba(0, 0, 0, 0.05), 0 4px 12px rgba(0, 0, 0, 0.03);
  --shadow-popup: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* Dark Charcoal (Warm & Non-Aggressive) */
html[data-theme="dark"] {
  --bg-app: #18191b;
  --bg-header: #1e2023;
  --bg-surface: #222428;
  --bg-surface-hover: #2b2e34;
  --bg-surface-active: #34383f;
  --bg-sheet: #1e2023;
  --border-subtle: #2d3036;
  --border-focus: #60a5fa;
  --text-main: #f0f0ee;
  --text-muted: #9da1aa;
  --text-soft: #636771;
  --accent-primary: #60a5fa;
  --accent-hover: #3b82f6;
  --accent-subtle: rgba(96, 165, 250, 0.12);
  --danger-color: #f43f5e;
  --danger-hover: #e11d48;
  --code-bg: #282a30;
  --shadow-sheet: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-popup: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* OLED Black */
html[data-theme="oled"] {
  --bg-app: #000000;
  --bg-header: #0a0a0b;
  --bg-surface: #121214;
  --bg-surface-hover: #1e1e22;
  --bg-surface-active: #28282c;
  --bg-sheet: #0d0d0f;
  --border-subtle: #222226;
  --border-focus: #818cf8;
  --text-main: #f4f4f5;
  --text-muted: #8e8e96;
  --text-soft: #55555c;
  --accent-primary: #818cf8;
  --accent-hover: #6366f1;
  --accent-subtle: rgba(129, 140, 248, 0.14);
  --danger-color: #fb7185;
  --danger-hover: #f43f5e;
  --code-bg: #161619;
  --shadow-sheet: 0 0 0 1px #222226;
  --shadow-popup: 0 12px 36px rgba(0, 0, 0, 0.8);
}

/* Vintage Sepia */
html[data-theme="sepia"] {
  --bg-app: #faf4eb;
  --bg-header: #fffdf9;
  --bg-surface: #fffdfa;
  --bg-surface-hover: #f4ebd9;
  --bg-surface-active: #ebdec8;
  --bg-sheet: #fffdfa;
  --border-subtle: #e8dcce;
  --border-focus: #b45309;
  --text-main: #3a2e22;
  --text-muted: #7d6c59;
  --text-soft: #a89784;
  --accent-primary: #b45309;
  --accent-hover: #92400e;
  --accent-subtle: rgba(180, 83, 9, 0.1);
  --danger-color: #be123c;
  --danger-hover: #9f1239;
  --code-bg: #f4ebd9;
  --shadow-sheet: 0 1px 4px rgba(60, 45, 30, 0.05);
  --shadow-popup: 0 8px 24px rgba(60, 45, 30, 0.1);
}

/* Calm Sage */
html[data-theme="sage"] {
  --bg-app: #f2f5f2;
  --bg-header: #fbfdfb;
  --bg-surface: #ffffff;
  --bg-surface-hover: #e4ebe4;
  --bg-surface-active: #d6e0d6;
  --bg-sheet: #ffffff;
  --border-subtle: #dbe3db;
  --border-focus: #2d6a4f;
  --text-main: #1b261d;
  --text-muted: #576b5a;
  --text-soft: #8ca08f;
  --accent-primary: #2d6a4f;
  --accent-hover: #1b4332;
  --accent-subtle: rgba(45, 106, 79, 0.1);
  --danger-color: #e11d48;
  --danger-hover: #be123c;
  --code-bg: #eaf0ea;
  --shadow-sheet: 0 1px 4px rgba(25, 45, 30, 0.05);
  --shadow-popup: 0 8px 24px rgba(25, 45, 30, 0.1);
}

/* --------------------------------------------------------------------------
   2. Reset & Core Structure & Custom Modern Scrollbars
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(150, 150, 150, 0.3) transparent;
}

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

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

::-webkit-scrollbar-thumb {
  background-color: rgba(150, 150, 150, 0.28);
  border-radius: 9999px;
  transition: background-color var(--transition-quick);
}

::-webkit-scrollbar-thumb:hover {
  background-color: rgba(150, 150, 150, 0.55);
}

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

[hidden] {
  display: none !important;
}

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

html, body {
  width: 100%;
  height: 100%;
  font-family: var(--font-ui);
  background-color: var(--bg-app);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body:not(.mpa-page) {
  overflow: hidden;
}

/* Standalone MPA Pages Scroll Fix */
html.mpa-html,
html:has(body.mpa-page),
body.mpa-page {
  height: auto !important;
  min-height: 100vh !important;
  overflow-y: auto !important;
  overflow-x: hidden !important;
  -webkit-overflow-scrolling: touch;
}

.app-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  background-color: var(--bg-app);
}

/* --------------------------------------------------------------------------
   3. Google Docs Style Top Header
   -------------------------------------------------------------------------- */
.gdocs-header {
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 100;
  position: relative;
  overflow: visible;
  transition: transform 0.28s cubic-bezier(0.2, 0, 0, 1), opacity 0.22s ease, margin-top 0.28s cubic-bezier(0.2, 0, 0, 1);
}

/* Row 1: Document Title & Main Actions */
.header-top-row {
  height: 52px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.logo-icon {
  width: 24px;
  height: 24px;
  display: block;
  object-fit: contain;
}

.title-status-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.doc-title-input {
  font-family: var(--font-ui);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  outline: none;
  width: 220px;
  max-width: 100%;
  min-width: 60px;
  flex-shrink: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: all var(--transition-quick);
}

.doc-title-input:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-subtle);
}

.doc-title-input:focus {
  background-color: var(--bg-surface);
  border-color: var(--border-focus);
}

.save-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  color: var(--text-muted);
  background-color: var(--bg-surface-hover);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  user-select: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.save-status-pill .status-icon {
  width: 12px;
  height: 12px;
  color: var(--accent-primary);
}

@media (max-width: 680px) {
  .save-status-pill span:not(.status-icon) {
    display: none;
  }
}

.header-actions-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Pill Buttons */
.pill-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  color: var(--text-main);
  cursor: pointer;
  outline: none;
  transition: all var(--transition-quick);
  white-space: nowrap;
}

.pill-btn:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--text-soft);
}

.pill-btn:active {
  background-color: var(--bg-surface-active);
}

.pill-btn.icon-only {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 50%;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pill-btn.icon-only svg {
  width: 16px;
  height: 16px;
  display: block;
}

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

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

.pill-btn-danger {
  background-color: var(--danger-color);
  color: #ffffff;
  border-color: var(--danger-color);
}

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

.pill-btn-secondary {
  background-color: var(--bg-surface-hover);
}

.pill-btn-sm {
  padding: 4px 10px;
  font-size: 0.78rem;
}

.btn-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background-color: var(--accent-primary);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: var(--radius-pill);
}

.icon {
  width: 16px;
  height: 16px;
}

.icon-sm {
  width: 13px;
  height: 13px;
}

/* Segmented View Mode Pill */
.segmented-pill {
  display: flex;
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 2px;
}

.segment-pill-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-quick);
}

.segment-pill-btn:hover {
  color: var(--text-main);
}

.segment-pill-btn.active {
  background-color: var(--bg-surface);
  color: var(--accent-primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* --------------------------------------------------------------------------
   4. Google Docs Style Menu Bar
   -------------------------------------------------------------------------- */
.gdocs-menubar {
  height: 30px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 2px;
  user-select: none;
  position: relative;
  overflow: visible !important;
  z-index: 160;
}

.menu-item-wrapper {
  position: relative;
}

.menubar-btn {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition-quick);
}

.menubar-btn:hover, .menu-item-wrapper.active .menubar-btn {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

/* Menubar Dropdown Cards */
.dropdown-card {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-popup);
  padding: 6px;
  min-width: 220px;
  z-index: 999;
  display: none;
  flex-direction: column;
  gap: 2px;
}

.menu-item-wrapper.active .dropdown-card {
  display: flex;
}

.menu-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-family: var(--font-ui);
  font-size: 0.83rem;
  padding: 6px 10px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  text-align: left;
  width: 100%;
}

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

.menu-item-row.text-danger {
  color: var(--danger-color);
}

.menu-item-row.text-danger:hover {
  background-color: rgba(225, 29, 72, 0.08);
}

.menu-divider {
  height: 1px;
  background-color: var(--border-subtle);
  margin: 4px 0;
}

kbd {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-soft);
  background-color: var(--bg-app);
  padding: 2px 5px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}

/* Theme Switcher Button & Indicator Dot */
.theme-btn-container {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.active-theme-dot {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  border: 1px solid var(--bg-surface);
  transition: background-color var(--transition-quick);
}

/* Theme Dropdown Card */
.dropdown-container {
  position: relative;
}

.theme-dropdown-card {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 185px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-popup);
  padding: 6px;
  z-index: 999;
  display: none;
  flex-direction: column;
  gap: 2px;
}

.dropdown-container.open .theme-dropdown-card {
  display: flex;
}

.dropdown-header-text {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-soft);
  padding: 4px 8px;
  letter-spacing: 0.05em;
}

.theme-item-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-main);
  font-family: var(--font-ui);
  font-size: 0.83rem;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  width: 100%;
  transition: all var(--transition-quick);
}

.theme-item-row .theme-name {
  flex: 1;
  color: var(--text-main);
  font-weight: 500;
}

.theme-item-row:hover {
  background-color: var(--bg-surface-hover);
}

.theme-item-row.active {
  background-color: var(--accent-subtle);
  border-color: rgba(45, 92, 246, 0.2);
}

.theme-item-row.active .theme-name {
  color: var(--accent-primary);
  font-weight: 600;
}

.theme-swatch {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1.5px solid var(--border-subtle);
  flex-shrink: 0;
  transition: transform var(--transition-quick), box-shadow var(--transition-quick);
}

.theme-item-row:hover .theme-swatch {
  transform: scale(1.1);
}

.theme-item-row.active .theme-swatch {
  box-shadow: 0 0 0 2px var(--bg-surface), 0 0 0 3.5px var(--accent-primary);
  transform: scale(1.05);
}

.warm-swatch { background: #f7f6f3; border-color: #d97706; }
.light-swatch { background: #ffffff; border-color: #94a3b8; }
.dark-swatch { background: #1e2023; border-color: #60a5fa; }
.oled-swatch { background: #000000; border-color: #818cf8; }
.sepia-swatch { background: #faf4eb; border-color: #b45309; }
.sage-swatch { background: #f2f5f2; border-color: #2d6a4f; }

.theme-check {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-quick);
  flex-shrink: 0;
}

.theme-check svg {
  width: 14px;
  height: 14px;
  display: block;
}

.theme-item-row.active .theme-check {
  opacity: 1;
  visibility: visible;
}

/* --------------------------------------------------------------------------
   5. Google Docs Style Ribbon Toolbar
   -------------------------------------------------------------------------- */
.gdocs-toolbar {
  height: 42px;
  padding: 0 16px;
  background-color: var(--bg-app);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 4px;
  overflow: visible !important;
  user-select: none;
  position: relative;
  z-index: 140;
}

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

.toolbar-sep {
  width: 1px;
  height: 18px;
  background-color: var(--border-subtle);
  margin: 0 4px;
  flex-shrink: 0;
}

.tool-btn {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.88rem;
  transition: all var(--transition-quick);
}

.tool-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

.tool-btn.active,
.fmt-btn.active,
.fmt-heading-btn.active,
.fmt-labeled-btn.active {
  background-color: var(--accent-subtle) !important;
  color: var(--accent-primary) !important;
  border-color: rgba(45, 92, 246, 0.38) !important;
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(45, 92, 246, 0.14);
}

[data-theme="dark"] .tool-btn.active,
[data-theme="oled"] .tool-btn.active {
  background-color: rgba(45, 92, 246, 0.25) !important;
  color: #60a5fa !important;
  border-color: rgba(96, 165, 250, 0.45) !important;
}

[data-theme="warm"] .tool-btn.active {
  background-color: rgba(180, 83, 9, 0.16) !important;
  color: #b45309 !important;
  border-color: rgba(180, 83, 9, 0.4) !important;
}

.fmt-heading-btn {
  font-weight: 700;
  font-size: 0.8rem;
  width: 32px;
}

.fmt-labeled-btn {
  width: auto;
  padding: 0 8px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Custom Toolbar Dropdowns (Styles & Fonts) */
.custom-dropdown-group {
  position: relative;
}

.tool-dropdown-trigger {
  height: 30px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-quick);
  white-space: nowrap;
  user-select: none;
}

.tool-dropdown-trigger:hover,
.custom-dropdown-group.open .tool-dropdown-trigger {
  background-color: var(--bg-surface-hover);
  border-color: var(--text-soft);
}

.icon-xs {
  width: 12px;
  height: 12px;
  color: var(--text-soft);
  transition: transform var(--transition-quick);
}

.custom-dropdown-group.open .icon-xs {
  transform: rotate(180deg);
}

.toolbar-dropdown-card {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 180px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-popup);
  padding: 6px;
  z-index: 999;
  display: none;
  flex-direction: column;
  gap: 2px;
  max-height: 380px;
  overflow-y: auto;
}

.custom-dropdown-group.open .toolbar-dropdown-card {
  display: flex;
}

.font-menu-card {
  min-width: 235px;
}

.style-menu-item.active,
.font-menu-item.active,
.line-spacing-item.active {
  background-color: var(--accent-subtle);
  border-color: rgba(45, 92, 246, 0.2);
}

.style-menu-item.active .style-preview-text,
.font-menu-item.active .font-preview-name,
.line-spacing-item.active span {
  color: var(--accent-primary);
  font-weight: 600;
}

.line-spacing-menu-card {
  min-width: 210px;
}

.custom-spacing-container {
  padding: 8px 10px 6px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.custom-spacing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.custom-spacing-container .toolbar-range {
  width: 100%;
}

.font-preview-name {
  flex: 1;
}

.style-preview-text {
  flex: 1;
}

.style-p { font-size: 0.85rem; font-weight: 400; }
.style-h1 { font-size: 1.1rem; font-weight: 700; }
.style-h2 { font-size: 0.95rem; font-weight: 600; }
.style-h3 { font-size: 0.88rem; font-weight: 600; }

/* Text Color & Highlight Color Palette System */
.color-tool-btn {
  width: 32px;
  height: 30px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.color-btn-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  line-height: 1;
}

.color-letter {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 0.92rem;
  line-height: 1;
  color: var(--text-main);
}

.highlight-icon {
  width: 14px;
  height: 14px;
  stroke-width: 2.2;
  color: var(--text-main);
}

.color-bar {
  width: 16px;
  height: 3px;
  border-radius: 1.5px;
  background-color: currentColor;
  transition: background-color var(--transition-quick);
}

.color-palette-popup {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  width: 224px;
  padding: 10px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-popup);
  display: none;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
}

.custom-dropdown-group.open .color-palette-popup {
  display: flex;
}

.palette-header {
  font-family: var(--font-ui);
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.palette-reset-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 6px 8px;
  background-color: var(--bg-surface-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  color: var(--text-main);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-quick);
}

.palette-reset-btn:hover {
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.palette-reset-btn .icon {
  width: 14px;
  height: 14px;
}

.color-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
}

.color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid rgba(0, 0, 0, 0.15);
  cursor: pointer;
  transition: transform var(--transition-quick), box-shadow var(--transition-quick);
  padding: 0;
  outline: none;
  position: relative;
}

[data-theme="dark"] .color-swatch,
[data-theme="oled"] .color-swatch {
  border-color: rgba(255, 255, 255, 0.2);
}

.color-swatch:hover {
  transform: scale(1.22);
  box-shadow: 0 0 0 2px var(--bg-surface), 0 0 0 3.5px var(--accent-primary);
  z-index: 2;
}

.color-swatch.active {
  box-shadow: 0 0 0 2px var(--bg-surface), 0 0 0 3.5px var(--accent-primary);
  transform: scale(1.1);
}

.palette-custom-row {
  border-top: 1px solid var(--border-subtle);
  padding-top: 8px;
}

.palette-custom-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
}

.palette-custom-label:hover {
  color: var(--text-main);
}

.palette-custom-label input[type="color"] {
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--border-subtle);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

/* Font Size Stepper & Manual Custom Input */
.font-size-stepper {
  display: flex;
  align-items: center;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0 2px;
  height: 30px;
}

.stepper-btn {
  width: 22px;
  height: 26px;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-quick);
  padding: 0;
  user-select: none;
}

.stepper-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

.font-size-input {
  font-size: 0.82rem;
  font-weight: 600;
  width: 32px;
  height: 24px;
  text-align: center;
  color: var(--text-main);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  outline: none;
  font-family: var(--font-ui);
  padding: 0 2px;
  margin: 0 1px;
  transition: all var(--transition-quick);
  -moz-appearance: textfield;
}

.font-size-input::-webkit-outer-spin-button,
.font-size-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.font-size-input:focus {
  background-color: var(--bg-surface-hover);
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(45, 92, 246, 0.15);
}

.toolbar-right-meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  gap: 4px;
}

/* Inline Toolbar Slider Controls */
.toolbar-slider-group {
  display: flex;
  align-items: center;
  gap: 5px;
}

.icon-sm {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--text-soft);
}

.toolbar-range {
  -webkit-appearance: none;
  appearance: none;
  width: 72px;
  height: 4px;
  background: var(--border-subtle);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
  transition: background var(--transition-quick);
}

.toolbar-range:hover {
  background: var(--text-soft);
}

.toolbar-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.toolbar-range::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.range-val {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-soft);
  min-width: 32px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.live-stats-pill {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-quick);
}

.live-stats-pill:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

.stat-bullet {
  color: var(--text-soft);
}

/* --------------------------------------------------------------------------
   6. Main Container & Sidebar Drawer
   -------------------------------------------------------------------------- */
.gdocs-main-container {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

/* Main Canvas Wrapper (Includes pinned top bars and scrollable document stage) */
.main-canvas-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-width: 0;
  overflow: hidden;
  position: relative;
}

/* Notes Sidebar Drawer */
.notes-sidebar-drawer {
  width: 300px;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: margin-left var(--transition-smooth);
  z-index: 30;
  flex-shrink: 0;
}

.notes-sidebar-drawer.collapsed {
  margin-left: -300px;
}

.sidebar-top {
  padding: 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-title-bar h3 {
  font-size: 1rem;
  font-weight: 600;
}

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

.sidebar-search-box .search-icon {
  position: absolute;
  left: 10px;
  width: 15px;
  height: 15px;
  color: var(--text-soft);
}

.sidebar-search-box input {
  width: 100%;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-main);
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 7px 28px 7px 32px;
  outline: none;
  transition: border-color var(--transition-quick);
}

.sidebar-search-box input:focus {
  border-color: var(--border-focus);
}

.clear-search-x {
  position: absolute;
  right: 8px;
  background: transparent;
  border: none;
  color: var(--text-soft);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
  transition: all var(--transition-quick);
}

.clear-search-x svg {
  width: 14px;
  height: 14px;
  display: block;
}

.clear-search-x:hover {
  color: var(--text-main);
  background-color: var(--bg-surface-hover);
}

.sidebar-notes-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.note-item-card {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background-color: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
  transition: all var(--transition-quick);
}

.note-item-card:hover {
  background-color: var(--bg-surface-hover);
}

.note-item-card.active {
  background-color: var(--bg-surface-active);
  border-color: var(--border-subtle);
}

.note-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.note-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

.note-card-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.note-card-pin {
  font-size: 0.85rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.note-card-preview {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.note-card-date {
  font-size: 0.72rem;
  color: var(--text-soft);
}

.note-delete-btn-hover {
  opacity: 0.75;
  visibility: visible;
  background: rgba(239, 68, 68, 0.08);
  border: none;
  color: var(--danger-color);
  font-size: 1.15rem;
  line-height: 1;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-quick);
  padding: 0;
  flex-shrink: 0;
}

.note-delete-btn-hover svg {
  width: 13px;
  height: 13px;
  display: block;
}

.note-delete-btn-hover:hover {
  opacity: 1;
  background-color: rgba(239, 68, 68, 0.2);
  transform: scale(1.1);
}

.sidebar-bottom-actions {
  padding: 14px;
  border-top: 1px solid var(--border-subtle);
}

.full-width {
  width: 100%;
}

/* --------------------------------------------------------------------------
   7. Document Page Stage (Sheet Container)
   -------------------------------------------------------------------------- */
.document-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 20px 84px 20px;
  background-color: var(--bg-app);
  position: relative;
}

/* The Document Page Sheet */
.document-page-sheet {
  width: 100%;
  max-width: var(--doc-max-width);
  min-height: calc(100vh - 110px);
  height: auto;
  background-color: var(--bg-sheet);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sheet);
  padding: 44px 52px 96px 52px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: max-width var(--transition-smooth), background-color var(--transition-smooth);
  cursor: text;
}

.document-page-sheet.resizing {
  transition: none !important;
}

/* Left & Right Interactive Drag Resize Handles */
.sheet-resize-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 18px;
  cursor: col-resize;
  z-index: 25;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  touch-action: none;
}

.sheet-resize-handle.handle-left {
  left: -9px;
}

.sheet-resize-handle.handle-right {
  right: -9px;
}

.handle-bar {
  width: 4px;
  height: 48px;
  background-color: var(--border-subtle);
  border-radius: var(--radius-pill);
  transition: all var(--transition-quick);
  opacity: 0.5;
}

.sheet-resize-handle:hover .handle-bar,
.sheet-resize-handle.active .handle-bar {
  opacity: 1;
  background-color: var(--accent-primary);
  height: 76px;
  width: 5px;
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.4);
}

/* Floating Paper Size & Dimensions Live Indicator */
.sheet-size-indicator {
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-popup);
  padding: 5px 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  z-index: 50;
  pointer-events: none;
  font-family: var(--font-ui);
  white-space: nowrap;
  animation: popBadge 0.15s cubic-bezier(0.2, 0, 0, 1);
  transition: border-color var(--transition-quick), box-shadow var(--transition-quick);
}

.sheet-size-indicator .size-preset-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.sheet-size-indicator .size-dims-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

.sheet-size-indicator .size-physical-tag {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Highlighting when touching / snapped to standard paper sizes (A4, Letter, A3...) */
.sheet-size-indicator.preset-match {
  border-color: var(--accent-primary);
  background-color: var(--bg-surface);
  box-shadow: 0 0 0 3px var(--accent-subtle), var(--shadow-popup);
}

@keyframes popBadge {
  from {
    opacity: 0;
    transform: translate(-50%, 6px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
  }
}

.editor-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: auto;
  cursor: text;
}

.write-pane {
  flex: 1;
  height: auto;
}

/* Paper Rich ContentEditable Editor */
.paper-editor {
  width: 100%;
  min-height: 520px;
  height: auto;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: var(--font-active);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  padding: 0;
  padding-bottom: 48px;
  white-space: pre-wrap;
  word-break: break-word;
  box-sizing: border-box;
  position: relative;
}

.paper-editor.is-empty::before {
  content: attr(data-placeholder);
  color: var(--text-soft);
  pointer-events: none;
  opacity: 0.65;
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--font-active, inherit);
  font-size: var(--font-size-base, inherit);
  line-height: var(--line-height-base, 1.6);
  letter-spacing: inherit;
  white-space: pre-wrap;
  display: block;
  user-select: none;
}

/* Ensure first element starts with 0 top margin to align pixel-perfect with placeholder & caret */
.paper-editor > *:first-child {
  margin-top: 0 !important;
}

/* Rich Elements inside Editor - Fixed Standard Headings */
.paper-editor h1, .markdown-preview-render h1 {
  font-size: 32px !important;
  font-weight: 700;
  margin: 0.8em 0 0.4em 0;
  line-height: 1.25;
  color: var(--text-main);
}

.paper-editor h2, .markdown-preview-render h2 {
  font-size: 24px !important;
  font-weight: 700;
  margin: 0.7em 0 0.3em 0;
  line-height: 1.3;
  color: var(--text-main);
}

.paper-editor h3, .markdown-preview-render h3 {
  font-size: 19px !important;
  font-weight: 600;
  margin: 0.6em 0 0.25em 0;
  line-height: 1.35;
  color: var(--text-main);
}

.paper-editor p, .markdown-preview-render p {
  margin: 0 0 0.6em 0;
  line-height: inherit;
}

.paper-editor b, .paper-editor strong, .markdown-preview-render strong {
  font-weight: 700;
}

.paper-editor i, .paper-editor em, .markdown-preview-render em {
  font-style: italic;
}

.paper-editor s, .paper-editor del, .markdown-preview-render del {
  text-decoration: line-through;
  color: var(--text-muted);
}

.paper-editor blockquote, .markdown-preview-render blockquote {
  padding: 8px 16px;
  border-left: 3px solid var(--accent-primary);
  background-color: var(--bg-surface-hover);
  margin: 0.8em 0;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-style: italic;
}

.paper-editor ul, .paper-editor ol, .markdown-preview-render ul, .markdown-preview-render ol {
  padding-left: 28px;
  margin: 0.5em 0;
}

.paper-editor li, .markdown-preview-render li {
  margin: 0.25em 0;
}

/* Checkbox Task Lists */
.paper-editor ul.task-list, .markdown-preview-render ul.task-list {
  list-style: none;
  padding-left: 4px;
  margin: 0.5em 0;
}

.paper-editor li.task-item, .markdown-preview-render li.task-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 0.35em 0;
}

.paper-editor li.task-item input[type="checkbox"], 
.markdown-preview-render li.task-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  accent-color: var(--accent-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.paper-editor li.task-item.completed .task-text,
.markdown-preview-render li.task-item.completed .task-text {
  text-decoration: line-through;
  color: var(--text-muted);
}

.paper-editor pre, .markdown-preview-render pre {
  background-color: var(--code-bg);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 0.8em 0;
  font-family: var(--font-mono);
  font-size: 0.88em;
  border: 1px solid var(--border-subtle);
}

.paper-editor code, .markdown-preview-render code {
  background-color: var(--code-bg);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.paper-editor hr, .markdown-preview-render hr {
  border: none;
  height: 1px;
  background-color: var(--border-subtle);
  margin: 1.5em 0;
}

/* Markdown Preview Rendering */
.markdown-preview-render {
  width: 100%;
  color: var(--text-main);
  font-family: var(--font-active);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
}

.markdown-preview-render h1, 
.markdown-preview-render h2, 
.markdown-preview-render h3 {
  margin-top: 1.4em;
  margin-bottom: 0.5em;
  font-weight: 700;
  line-height: 1.25;
}

.markdown-preview-render h1 { font-size: 32px !important; border-bottom: 1px solid var(--border-subtle); padding-bottom: 0.3em; }
.markdown-preview-render h2 { font-size: 24px !important; }
.markdown-preview-render h3 { font-size: 19px !important; }

.markdown-preview-render p { margin-bottom: 1em; }
.markdown-preview-render blockquote {
  padding: 10px 18px;
  border-left: 3px solid var(--accent-primary);
  background-color: var(--bg-surface-hover);
  margin-bottom: 1em;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.markdown-preview-render pre {
  background-color: var(--code-bg);
  padding: 14px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 1em;
  font-family: var(--font-mono);
  font-size: 0.88em;
  border: 1px solid var(--border-subtle);
}

.markdown-preview-render code {
  background-color: var(--code-bg);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.markdown-preview-render ul, .markdown-preview-render ol {
  padding-left: 24px;
  margin-bottom: 1em;
}

.markdown-preview-render li { margin-bottom: 0.3em; }

.markdown-preview-render hr {
  border: none;
  height: 1px;
  background-color: var(--border-subtle);
  margin: 1.6em 0;
}

/* --------------------------------------------------------------------------
   8. Find & Replace Dedicated Toolbar Strip (Pinned Top Bar, Never Floats/Fixed)
   -------------------------------------------------------------------------- */
.find-replace-strip {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 8px 18px;
  display: flex;
  align-items: center;
  z-index: 40;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  animation: stripSlideDown 0.18s cubic-bezier(0.2, 0, 0, 1);
}

@keyframes stripSlideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.find-replace-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  width: 100%;
}

.find-field-group, .replace-field-group {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 3px 8px 3px 10px;
  transition: border-color var(--transition-quick), box-shadow var(--transition-quick);
}

.find-field-group:focus-within, .replace-field-group:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(45, 92, 246, 0.12);
}

.find-icon-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-soft);
  flex-shrink: 0;
}

.find-svg-icon {
  width: 14px;
  height: 14px;
}

.find-strip-input {
  border: none;
  background: transparent;
  outline: none;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-main);
  min-width: 150px;
  max-width: 220px;
  padding: 3px 4px;
}

.find-nav-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background-color var(--transition-quick), color var(--transition-quick);
}

.find-nav-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

.find-nav-btn svg {
  width: 13px;
  height: 13px;
}

.find-divider {
  width: 1px;
  height: 20px;
  background-color: var(--border-subtle);
  margin: 0 2px;
  flex-shrink: 0;
}

.replace-action-btn {
  padding: 3px 10px;
  font-size: 0.78rem;
  font-weight: 500;
}

.close-find-btn {
  margin-left: auto;
  flex-shrink: 0;
}

.match-count-badge {
  font-size: 0.75rem;
  color: var(--text-soft);
  min-width: 36px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  padding: 0 4px;
}

/* In-Document Find & Replace Highlights */
mark.find-highlight {
  background-color: rgba(253, 224, 71, 0.55);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
  transition: background-color var(--transition-quick), box-shadow var(--transition-quick);
}

[data-theme="dark"] mark.find-highlight,
[data-theme="oled"] mark.find-highlight {
  background-color: rgba(202, 138, 4, 0.45);
}

mark.find-highlight.active {
  background-color: #f59e0b !important;
  color: #000000 !important;
  box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.8);
  font-weight: 600;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   9. Encrypted Note Password Lock Dialog
   -------------------------------------------------------------------------- */
.encrypted-lock-modal {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 60;
}

.lock-dialog-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-popup);
  padding: 36px;
  max-width: 380px;
  width: 90%;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.lock-icon-circle {
  width: 52px;
  height: 52px;
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.lock-icon-circle svg {
  width: 24px;
  height: 24px;
}

.lock-dialog-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

.lock-dialog-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.lock-dialog-card form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.doc-form-input {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-app);
  color: var(--text-main);
  outline: none;
}

.doc-form-input:focus {
  border-color: var(--border-focus);
}

.error-badge {
  color: var(--danger-color);
  font-size: 0.82rem;
}

/* --------------------------------------------------------------------------
   10. Bottom Footer
   -------------------------------------------------------------------------- */
.gdocs-footer {
  height: 28px;
  padding: 0 16px;
  background-color: var(--bg-header);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-soft);
  user-select: none;
  z-index: 40;
  transition: transform 0.28s cubic-bezier(0.2, 0, 0, 1), opacity 0.22s ease, margin-bottom 0.28s cubic-bezier(0.2, 0, 0, 1);
}

.footer-left-info, .footer-right-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-sep {
  color: var(--border-subtle);
}

.privacy-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   11. Focus Mode & Floating Pill
   -------------------------------------------------------------------------- */
body.focus-mode .gdocs-header {
  margin-top: -125px;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

body.focus-mode .gdocs-footer {
  margin-bottom: -29px;
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
}

body.focus-mode .notes-sidebar-drawer {
  margin-left: -300px;
}

body.focus-mode .document-stage {
  padding: 24px 20px 84px 20px;
}

body.focus-mode .find-replace-strip {
  display: none !important;
}

.floating-focus-pill {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-popup);
  padding: 6px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 100;
  opacity: 0.35;
  transition: opacity var(--transition-quick);
}

.floating-focus-pill:hover {
  opacity: 1;
}

.focus-word-counter {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   12. Slash Commands Palette
   -------------------------------------------------------------------------- */
.slash-command-palette {
  position: absolute;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-popup);
  width: 250px;
  padding: 6px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.palette-header {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-soft);
  padding: 6px 10px;
  letter-spacing: 0.05em;
}

.palette-item {
  display: flex;
  flex-direction: column;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-quick);
}

.palette-item:hover {
  background-color: var(--bg-surface-hover);
}

.cmd-chip {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.cmd-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   13. Rounded Native Dialogs
   -------------------------------------------------------------------------- */
.rounded-dialog {
  border: none;
  background: transparent;
  padding: 0;
  margin: auto;
  max-width: 520px;
  width: 90%;
  outline: none;
}

.rounded-dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
}

.dialog-content-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-popup);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  color: var(--text-main);
  animation: dropIn 0.25s cubic-bezier(0.2, 0, 0, 1);
}

/* Custom Action Confirmation Modal */
.confirm-dialog {
  max-width: 420px;
}

.confirm-dialog-card {
  padding: 32px 26px 24px 26px;
  align-items: center;
  text-align: center;
  gap: 14px;
}

.danger-icon-circle {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background-color: rgba(239, 68, 68, 0.12);
  color: var(--danger-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2px;
}

.danger-icon-circle svg {
  width: 26px;
  height: 26px;
}

.confirm-text-group h2 {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.confirm-text-group .dialog-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin: 0 auto;
}

.confirm-actions-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  margin-top: 10px;
}

.confirm-actions-row .pill-btn {
  flex: 1;
  padding: 9px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  justify-content: center;
}

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

.dialog-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
}

.close-dialog-x {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-soft);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin: 0;
  transition: all var(--transition-quick);
  flex-shrink: 0;
}

.close-dialog-x svg {
  width: 18px;
  height: 18px;
  display: block;
}

.close-dialog-x:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
  border-color: var(--border-subtle);
}

.dialog-body {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.dialog-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dialog-section h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.setting-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.85rem;
}

.setting-item-row.vertical {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.setting-item-row.vertical .doc-form-input {
  width: 100%;
}

.checkbox-align {
  justify-content: flex-start;
  gap: 10px;
}

.rounded-range {
  accent-color: var(--accent-primary);
}

.dialog-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.actions-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.cursor-pointer { cursor: pointer; }

.danger-zone-box {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border-subtle);
}

.dialog-footer-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 10px;
}

.shortcuts-grid-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.shortcuts-grid-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-subtle);
}

/* Stats Summary Grid */
.stats-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.stat-card {
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-big-number {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Horizontal Storage Notice Banner (Non-blocking, above canvas)
   -------------------------------------------------------------------------- */
.storage-notice-banner {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 8px 16px;
  z-index: 90;
  position: relative;
  animation: slideDownBanner 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  transition: all var(--transition-quick);
  flex-shrink: 0;
}

.storage-notice-banner[hidden] {
  display: none !important;
}

@keyframes slideDownBanner {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.banner-inner {
  max-width: 1050px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.banner-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1;
}

.banner-icon-badge {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background-color: rgba(245, 158, 11, 0.14);
  color: #f59e0b;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.banner-icon-badge svg {
  width: 15px;
  height: 15px;
}

.banner-content {
  font-size: 0.82rem;
  color: var(--text-main);
  line-height: 1.4;
  min-width: 0;
}

.banner-content strong {
  color: var(--text-main);
  font-weight: 600;
}

.banner-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.pill-btn-xs {
  font-size: 0.76rem;
  padding: 3px 12px;
  height: 26px;
  font-weight: 600;
  border-radius: var(--radius-pill);
}

.banner-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-quick);
}

.banner-close-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-main);
}

.banner-close-btn svg {
  width: 16px;
  height: 16px;
}

@media (max-width: 768px) {
  .banner-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .banner-actions {
    align-self: flex-end;
  }
}

/* About Real Online Notepad Modal */
/* About Real Online Notepad Modal - Fits 100% in One Screen without Scrolling */
#aboutModal.rounded-dialog {
  max-width: 660px;
  width: 94vw;
}

.about-dialog-card {
  padding: 20px 24px 18px 24px;
  gap: 12px;
  max-width: 100%;
}

.about-brand-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.about-brand-logo {
  width: 46px;
  height: 46px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.12));
}

.about-brand-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
}

.about-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.15;
  margin: 0;
}

.about-badges-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 3px;
  flex-wrap: wrap;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: var(--radius-pill);
  line-height: 1.3;
}

.badge-version {
  background-color: var(--bg-surface-hover);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

.badge-tech {
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
}

.badge-private {
  background-color: rgba(34, 197, 94, 0.12);
  color: #22c55e;
}

.about-dialog-body {
  gap: 10px;
}

.about-lead {
  font-size: 0.83rem;
  color: var(--text-main);
  line-height: 1.4;
  margin: 0;
}

.about-section-heading {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

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

@media (max-width: 580px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

.about-grid-card {
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.about-icon-circle {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-xs);
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.about-icon-circle svg {
  width: 14px;
  height: 14px;
}

.about-card-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 2px;
}

.about-card-desc {
  font-size: 0.73rem;
  color: var(--text-muted);
  line-height: 1.35;
  margin: 0;
}

.about-telemetry-box {
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px 16px;
}

@media (max-width: 580px) {
  .about-telemetry-box {
    grid-template-columns: 1fr;
  }
}

.telemetry-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.telemetry-label {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.telemetry-val {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
}

/* --------------------------------------------------------------------------
   14. Toast Notifications Stack
   -------------------------------------------------------------------------- */
.toast-stack-container {
  position: fixed;
  bottom: 40px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
  pointer-events: none;
}

.toast-pill {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-popup);
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  animation: dropIn 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.toast-pill.toast-success {
  border-color: var(--accent-primary);
}

.toast-pill.toast-error {
  border-color: var(--danger-color);
}

/* --------------------------------------------------------------------------
   15. Print Mode (@media print)
   -------------------------------------------------------------------------- */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .gdocs-header,
  .gdocs-footer,
  .notes-sidebar-drawer,
  .find-replace-strip,
  .storage-notice-banner,
  .floating-focus-pill,
  .slash-command-palette,
  dialog,
  .toast-stack-container {
    display: none !important;
  }

  .document-stage,
  .document-page-sheet {
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    box-shadow: none !important;
    max-width: 100% !important;
  }

  .paper-textarea {
    color: #000000 !important;
    font-size: 12pt !important;
    line-height: 1.5 !important;
  }
}

/* --------------------------------------------------------------------------
   15b. LaTeX Math Rendering
   -------------------------------------------------------------------------- */
.latex-rendered {
  display: inline-block;
  vertical-align: middle;
  padding: 1px 4px;
  margin: 0 2px;
  border-radius: var(--radius-xs);
  background-color: rgba(125, 125, 125, 0.08);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-quick);
  user-select: none;
  position: relative;
  font-size: 1.05em;
  line-height: 1;
}

.latex-rendered:hover {
  background-color: var(--accent-subtle);
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 1.5px var(--accent-primary);
}

.latex-rendered.display-mode {
  display: block;
  text-align: center;
  padding: 14px 18px;
  margin: 16px auto;
  max-width: 100%;
  overflow-x: auto;
  background-color: var(--bg-surface-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.latex-source-editor {
  display: inline-block;
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.92em;
  background-color: var(--bg-surface);
  border: 1.5px solid var(--accent-primary, #3b82f6);
  border-radius: 10px;
  padding: 2px 10px;
  margin: 0 3px;
  color: var(--text-main);
  outline: none;
  min-width: 30px;
  white-space: pre;
  vertical-align: baseline;
  box-shadow: 0 0 0 2px var(--accent-subtle);
  transition: border-color var(--transition-quick), box-shadow var(--transition-quick);
}

.latex-source-editor:focus {
  border-color: var(--accent-primary, #3b82f6);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.latex-source-editor.display-mode {
  display: block;
  width: 100%;
  text-align: left;
  margin: 12px 0;
  padding: 10px 14px;
  border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   15.5 SEO Editorial Guide & FAQ Section Styling
   -------------------------------------------------------------------------- */
.seo-guide-container {
  width: 100%;
  max-width: var(--doc-max-width);
  margin-top: 32px;
  margin-bottom: 48px;
  background-color: var(--bg-sheet);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 28px 32px;
  color: var(--text-main);
  font-family: var(--font-ui);
  transition: max-width var(--transition-smooth), background-color var(--transition-smooth);
}

body.focus-mode .seo-guide-container {
  display: none !important;
}

.seo-guide-header {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.seo-badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.seo-main-heading {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.3;
}

.seo-lead-text {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.seo-sections-wrapper {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.seo-content-block {
  display: flex;
  flex-direction: column;
}

.seo-subheading {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
}

.seo-content-block p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.seo-content-block p:last-child {
  margin-bottom: 0;
}

.seo-content-block a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
}

.seo-content-block a:hover {
  text-decoration: underline;
}

/* Features Grid */
.seo-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 4px;
}

.seo-feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-quick), transform var(--transition-quick), box-shadow var(--transition-quick);
}

.seo-feature-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.seo-card-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  flex-shrink: 0;
}

.seo-card-icon svg {
  width: 18px;
  height: 18px;
}

.seo-feature-card h4 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.seo-feature-card p {
  font-size: 0.80rem !important;
  line-height: 1.45 !important;
  color: var(--text-muted) !important;
  margin: 0 !important;
}

/* Lists */
.seo-numbered-list {
  padding-left: 18px;
  margin-top: 4px;
  margin-bottom: 4px;
}

.seo-numbered-list li {
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.seo-numbered-list li strong {
  color: var(--text-main);
}

/* FAQ Accordion Stack */
.seo-faq-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.seo-faq-entry {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition-quick);
}

.seo-faq-entry[open] {
  border-color: var(--accent-primary);
}

.seo-faq-title {
  padding: 10px 14px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-main);
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  transition: background-color var(--transition-quick);
}

.seo-faq-title::-webkit-details-marker {
  display: none;
}

.seo-faq-title:hover {
  background-color: var(--bg-surface-hover);
}

.faq-chevron {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: transform var(--transition-quick), color var(--transition-quick);
  flex-shrink: 0;
  margin-left: 10px;
}

.seo-faq-entry[open] .faq-chevron {
  transform: rotate(180deg);
  color: var(--accent-primary);
}

.seo-faq-body {
  padding: 0 14px 12px 14px;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.seo-faq-body p {
  margin: 0 !important;
}

/* --------------------------------------------------------------------------
   15.6 Multi-Page Application (MPA) Pages & Site Footer Styling
   -------------------------------------------------------------------------- */
.site-nav-footer {
  width: 100%;
  max-width: var(--doc-max-width);
  margin: 0 auto 40px auto;
  padding: 24px 20px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-family: var(--font-ui);
}

body.focus-mode .site-nav-footer {
  display: none !important;
}

.site-nav-footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.site-nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-main);
}

.site-nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 14px;
}

.footer-nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 500;
  transition: color var(--transition-quick);
}

.footer-nav-link:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

.footer-nav-dot {
  color: var(--border-subtle);
  font-size: 0.8rem;
}

.site-nav-copy {
  font-size: 0.78rem;
  color: var(--text-soft);
}

/* Standalone MPA Pages Styling */
body.mpa-page {
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-ui);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.mpa-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.mpa-header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.mpa-brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.05rem;
}

.mpa-brand-link img {
  border-radius: 6px;
}

/* Google AdSense Compliant Top Header Nav Links */
.header-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: 4px;
}

.header-nav-link {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  background-color: transparent;
  transition: all var(--transition-quick);
  white-space: nowrap;
}

.header-nav-link:hover {
  color: var(--accent-primary);
  background-color: var(--bg-surface-hover);
}

.menubar-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  padding-right: 8px;
  flex-shrink: 0;
}

.menubar-nav-link {
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition: all var(--transition-quick);
  white-space: nowrap;
}

.menubar-nav-link:hover {
  color: var(--accent-primary);
  background-color: var(--bg-surface-hover);
}

/* MPA Header Nav */
.mpa-top-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.mpa-nav-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition-quick);
}

.mpa-nav-link:hover {
  color: var(--accent-primary);
  background-color: var(--bg-surface-hover);
}

.mpa-nav-link.active {
  color: var(--accent-primary);
  background-color: var(--accent-subtle);
  font-weight: 600;
}

.mpa-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mpa-main-container {
  flex: 1;
  max-width: 860px;
  width: 100%;
  margin: 32px auto 60px auto;
  padding: 0 20px;
}

.mpa-card {
  background-color: var(--bg-sheet);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sheet);
  padding: 44px 48px;
}

.mpa-title-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.mpa-main-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.25;
}

.mpa-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.mpa-body {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.mpa-section {
  display: flex;
  flex-direction: column;
}

.mpa-section-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
}

.mpa-section p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.mpa-section p:last-child {
  margin-bottom: 0;
}

.mpa-section ul,
.mpa-section ol {
  padding-left: 22px;
  margin-top: 6px;
  margin-bottom: 12px;
}

.mpa-section li {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.mpa-section li strong {
  color: var(--text-main);
}

.mpa-callout {
  background-color: var(--bg-surface);
  border-left: 3px solid var(--accent-primary);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 14px 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-main);
}

.mpa-callout-warning {
  border-left-color: #f59e0b;
  background-color: var(--bg-surface);
}

.mpa-contact-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 12px;
}

.mpa-contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mpa-contact-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mpa-contact-icon svg {
  width: 20px;
  height: 20px;
}

.mpa-contact-details {
  display: flex;
  flex-direction: column;
}

.mpa-contact-label {
  font-size: 0.78rem;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mpa-contact-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
}

.mpa-contact-value:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

.mpa-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.mpa-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.mpa-form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.mpa-form-input,
.mpa-form-textarea {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--text-main);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-quick);
}

.mpa-form-input:focus,
.mpa-form-textarea:focus {
  border-color: var(--accent-primary);
}

.mpa-form-textarea {
  min-height: 120px;
  resize: vertical;
}

@media (max-width: 768px) {
  .mpa-card {
    padding: 24px 18px;
    border-radius: var(--radius-md);
  }
  .mpa-main-title {
    font-size: 1.4rem;
  }
  .mpa-main-container {
    margin: 20px auto 40px auto;
  }
}

/* Error Pages (404, 500, etc.) */
.error-card {
  text-align: center;
  padding: 56px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-width: 640px;
  margin: 0 auto;
}

.error-icon-wrapper {
  width: 68px;
  height: 68px;
  border-radius: var(--radius-pill);
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.error-icon-wrapper svg {
  width: 32px;
  height: 32px;
}

.error-icon-wrapper.warning {
  background-color: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

.error-giant-code {
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--accent-primary);
  margin-bottom: 8px;
}

.error-giant-code.warning {
  color: #f59e0b;
}

.error-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.error-description {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 460px;
  margin: 0 auto 28px auto;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 32px;
}

.error-links-box {
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.error-links-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.error-links-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.error-links-list a {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-quick);
}

.error-links-list a:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   16. Multi-Device Responsive Design System (Mobile, Tablet, Desktop)
   -------------------------------------------------------------------------- */

/* Sidebar Mobile Backdrop */
.sidebar-backdrop {
  display: none;
}

.toolbar-group,
.custom-dropdown-group {
  flex-shrink: 0;
}

/* Tablet Landscape & Laptops (<= 1024px) */
@media (max-width: 1024px) {
  .document-page-sheet {
    max-width: 95%;
  }

  .toolbar-right-meta {
    display: none;
  }
}

/* Tablet Portrait & Medium Screens (<= 768px) */
@media (max-width: 768px) {
  /* 1. Off-Canvas Sidebar Drawer */
  .notes-sidebar-drawer {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 85vw;
    max-width: 320px;
    z-index: 1000;
    box-shadow: var(--shadow-popup);
    transform: translateX(0);
    transition: transform var(--transition-smooth);
    margin-left: 0 !important;
  }

  .notes-sidebar-drawer.collapsed {
    transform: translateX(-105%);
    margin-left: 0 !important;
  }

  .sidebar-backdrop:not([hidden]) {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 990;
    animation: fadeIn 0.2s ease;
  }

  /* 2. Top Header & Document Title Row */
  .header-top-row {
    height: 48px;
    padding: 0 10px;
    gap: 8px;
  }

  .header-title-group {
    gap: 8px;
    min-width: 0;
  }

  .doc-title-input {
    max-width: 160px;
    font-size: 0.95rem;
    padding: 2px 6px;
  }

  .save-status-pill {
    display: none;
  }

  .btn-label {
    display: none;
  }

  .header-actions-group {
    gap: 4px;
  }

  .header-actions-group .pill-btn {
    padding: 0 8px;
    height: 32px;
  }

  /* 3. Menubar & Toolbar - Touch Scrolling */
  .gdocs-menubar {
    height: 32px;
    padding: 0 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    white-space: nowrap;
    gap: 2px;
  }
  .gdocs-menubar::-webkit-scrollbar {
    display: none;
  }

  .menubar-btn {
    padding: 3px 8px;
    font-size: 0.8rem;
    flex-shrink: 0;
  }

  .gdocs-toolbar {
    height: 40px;
    padding: 0 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    white-space: nowrap;
    flex-wrap: nowrap;
    gap: 3px;
  }
  .gdocs-toolbar::-webkit-scrollbar {
    display: none;
  }

  .toolbar-group {
    flex-shrink: 0;
  }

  /* 4. Canvas Stage & Document Paper Sheet */
  .document-stage {
    padding: 10px 8px 50px 8px;
    overflow-x: hidden;
  }

  .document-page-sheet {
    width: 100% !important;
    max-width: 100% !important;
    min-height: calc(100vh - 140px);
    padding: 20px 14px 60px 14px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
  }

  .paper-editor {
    min-height: 400px;
    font-size: 16px;
    line-height: 1.6;
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .sheet-resize-handle,
  .sheet-size-indicator {
    display: none !important;
  }

  /* 5. Find & Replace Bar */
  .find-replace-strip {
    padding: 8px 10px;
  }

  .find-replace-inner {
    flex-wrap: wrap;
    gap: 6px;
  }

  .find-field-group,
  .replace-field-group {
    flex: 1 1 100%;
    min-width: 0;
  }

  .find-divider {
    display: none;
  }

  /* 6. Modals & Dialogs */
  .rounded-dialog {
    max-width: 95vw !important;
    width: 95vw !important;
    padding: 16px 12px;
    max-height: 90vh;
    border-radius: var(--radius-md);
    margin: auto;
  }

  .about-grid,
  .stats-grid-row,
  .settings-grid {
    grid-template-columns: 1fr !important;
    gap: 10px !important;
  }

  .about-badges-row {
    flex-wrap: wrap;
    gap: 4px;
  }

  .about-telemetry-box {
    grid-template-columns: 1fr !important;
    gap: 8px;
  }

  .confirm-dialog-card {
    padding: 16px 12px;
  }

  .confirm-actions-row {
    flex-direction: column-reverse;
    gap: 8px;
    width: 100%;
  }

  .confirm-actions-row .pill-btn {
    width: 100%;
    justify-content: center;
  }

  .lock-dialog-card {
    padding: 20px 14px;
  }

  /* 7. Footer Status Bar */
  .gdocs-footer {
    height: 28px;
    padding: 0 8px;
    font-size: 0.72rem;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
  }
  .gdocs-footer::-webkit-scrollbar {
    display: none;
  }

  .footer-right-info {
    display: none;
  }

  .floating-focus-pill {
    top: 10px;
    right: 10px;
    padding: 4px 10px;
    font-size: 0.75rem;
  }

  /* 8. SEO Guide Container Mobile */
  .seo-guide-container {
    padding: 24px 16px;
    margin-top: 28px;
    margin-bottom: 40px;
    border-radius: var(--radius-md);
  }

  .seo-main-heading {
    font-size: 1.35rem;
  }

  .seo-subheading {
    font-size: 1.1rem;
  }

  .seo-lead-text {
    font-size: 0.92rem;
  }

  .seo-features-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile Phones (<= 480px) */
@media (max-width: 480px) {
  .header-top-row {
    height: 46px;
    padding: 0 6px;
    gap: 4px;
  }

  .header-title-group {
    gap: 6px;
    min-width: 0;
    flex: 1 1 auto;
  }

  .brand-logo {
    display: none;
  }

  .doc-title-input {
    max-width: 130px;
    font-size: 0.88rem;
    padding: 2px 4px;
  }

  .header-actions-group {
    gap: 3px;
    flex-shrink: 0;
  }

  .header-actions-group .pill-btn {
    padding: 0 6px;
    min-width: 30px;
    height: 30px;
  }

  .gdocs-menubar {
    height: 28px;
    padding: 0 4px;
    gap: 1px;
  }

  .menubar-btn {
    padding: 2px 6px;
    font-size: 0.76rem;
  }

  .gdocs-toolbar {
    height: 38px;
    padding: 0 4px;
    gap: 2px;
  }

  .tool-btn {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }

  .tool-dropdown-trigger {
    height: 28px;
    padding: 0 6px;
    font-size: 0.76rem;
    gap: 2px;
  }

  .font-size-stepper {
    height: 28px;
  }

  .stepper-btn {
    width: 20px;
    height: 24px;
  }

  .font-size-input {
    width: 26px;
    height: 22px;
    font-size: 0.76rem;
  }

  .fmt-heading-btn {
    width: 28px;
  }

  .fmt-labeled-btn {
    padding: 0 6px;
    font-size: 0.75rem;
  }

  .document-stage {
    padding: 6px 4px 40px 4px;
  }

  .document-page-sheet {
    padding: 16px 10px 48px 10px;
    border-radius: var(--radius-sm);
    min-height: calc(100vh - 125px);
  }

  .paper-editor {
    min-height: 360px;
    font-size: 16px; /* Prevents iOS auto-zoom */
    line-height: 1.55;
  }

  .floating-focus-pill {
    top: 8px;
    right: 8px;
    padding: 3px 8px;
    font-size: 0.72rem;
  }

  .toast-stack-container {
    bottom: 10px;
    right: 10px;
    left: 10px;
    align-items: center;
  }

  .toast-pill {
    max-width: 92vw;
    font-size: 0.82rem;
  }

  .seo-guide-container {
    padding: 20px 12px;
    margin-top: 20px;
    margin-bottom: 30px;
  }

  .seo-main-heading {
    font-size: 1.22rem;
  }

  .seo-faq-title {
    padding: 12px 14px;
    font-size: 0.88rem;
  }

  .seo-faq-body {
    padding: 0 14px 14px 14px;
    font-size: 0.84rem;
  }
}