/* ============================================
   lwriter — Styles
   ============================================ */

/* ---------- Fonts (iA Writer Quattro, SIL OFL — see fonts/LICENSE.md) ---------- */
@font-face {
  font-family: "iA Writer Quattro S";
  src: url("fonts/iAWriterQuattroS-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "iA Writer Quattro S";
  src: url("fonts/iAWriterQuattroS-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "iA Writer Quattro S";
  src: url("fonts/iAWriterQuattroS-Italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "iA Writer Quattro S";
  src: url("fonts/iAWriterQuattroS-BoldItalic.woff2") format("woff2");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

/* JetBrains Mono, SIL OFL — see fonts/JetBrainsMono-OFL.txt */
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-Italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-BoldItalic.woff2") format("woff2");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Light theme (default) — write0 palette */
  --bg: #fafafa;
  --hover: rgba(0, 0, 0, 0.05);
  --border: #e5e5e5;
  --text: #262626;
  --text-secondary: #737373;
  --text-muted: #a3a3a3;
  --accent: #2563eb;
  --selection-bg: rgba(191, 219, 254, 0.55);
  --code-bg: rgba(0, 0, 0, 0.05);
  --caret: #2563eb;
  --close-hover: #e81123;
  --panel-bg: #ffffff;
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.2);

  /* Editor typography (default: JetBrains Mono; switchable via the Aa menu) */
  --editor-font: "JetBrains Mono", "Cascadia Code", "Consolas", monospace;
  --ui-font: "Segoe UI Variable Text", "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
  --editor-size: 18px;
  --editor-lh: 1.75;
  --editor-column: 48rem;
  --editor-top: 4rem;

  /* Chrome heights */
  --titlebar-h: 40px;
  --statusbar-h: 32px;

  /* Preview typography */
  --preview-font: Georgia, "Times New Roman", serif;
  --preview-size: 18px;

  color-scheme: light;
}

:root.dark {
  --bg: #191919;
  --hover: rgba(255, 255, 255, 0.06);
  --border: #2a2a2a;
  --text: #e5e5e5;
  --text-secondary: #a3a3a3;
  --text-muted: #6f6f6f;
  --accent: #60a5fa;
  --selection-bg: rgba(30, 64, 175, 0.5);
  --code-bg: rgba(255, 255, 255, 0.07);
  --caret: #60a5fa;
  --panel-bg: #171717;
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6);

  color-scheme: dark;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--ui-font);
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  user-select: none;
  -webkit-user-select: none;
  transition: background 0.2s ease, color 0.2s ease;
}

/* ---------- Title Bar ----------
   Seamless with the page: no border, no fill. Filename dead-center,
   Windows caption buttons on the right. Fades away while writing. */
#titlebar {
  height: var(--titlebar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0;
  position: relative;
  z-index: 10;
}

#titlebar-left {
  display: flex;
  align-items: center;
  gap: 2px;
  height: 100%;
  padding: 0 6px;
}

/* Small tool buttons (sidebar toggle, font picker) */
.tool-btn {
  width: 30px;
  height: 30px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--ui-font);
  font-size: 12.5px;
  font-weight: 500;
  cursor: default;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease;
}

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

.tool-btn.active {
  background: var(--hover);
  color: var(--text);
}

/* ---------- Font picker menu ---------- */
#font-picker {
  position: relative;
  display: flex;
  align-items: center;
}

.menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 50;
  min-width: 180px;
  padding: 4px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  animation: fadeInUp 0.15s ease-out;
}

.menu button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 7px 10px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  font-family: var(--ui-font);
  font-size: 13px;
  text-align: left;
  cursor: default;
}

.menu button:hover {
  background: var(--hover);
}

.menu button .check {
  color: var(--accent);
  font-size: 11px;
  visibility: hidden;
}

.menu button.selected .check {
  visibility: visible;
}

/* ---------- Context menu ---------- */
.context-menu {
  position: fixed;
  top: auto;
  left: auto;
  z-index: 200;
  min-width: 170px;
}

.menu .menu-sep {
  height: 1px;
  margin: 4px 6px;
  background: var(--border);
}

.menu button .hint {
  color: var(--text-muted);
  font-size: 11px;
  margin-left: 16px;
}

.menu button.danger {
  color: var(--close-hover);
}

.menu button.danger:hover {
  background: rgba(232, 17, 35, 0.1);
}

/* ---------- Inline rename ---------- */
.rename-input {
  width: 100%;
  border: none;
  border-radius: 4px;
  padding: 1px 4px;
  margin: -1px -4px;
  background: var(--hover);
  color: var(--text);
  font-family: var(--ui-font);
  font-size: 13px;
  font-weight: 500;
  outline: 1px solid var(--accent);
}

/* ---------- Find & replace ---------- */
#find-bar {
  position: fixed;
  top: calc(var(--titlebar-h) + 10px);
  right: 18px;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  animation: fadeInUp 0.15s ease-out;
}

.find-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

#find-bar input {
  width: 190px;
  border: none;
  border-radius: 6px;
  padding: 5px 8px;
  background: var(--hover);
  color: var(--text);
  font-family: var(--ui-font);
  font-size: 12.5px;
  outline: none;
}

#find-bar input::placeholder {
  color: var(--text-muted);
}

#find-bar input:focus {
  outline: 1px solid var(--accent);
}

#find-count {
  min-width: 52px;
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.find-btn {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border: none;
  border-radius: 5px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--ui-font);
  font-size: 11px;
  font-weight: 500;
  cursor: default;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease;
}

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

.find-btn.active {
  background: var(--hover);
  color: var(--accent);
}

#find-toggle-replace .chevron {
  transition: transform 0.15s ease;
}

#find-bar.replace-open #find-toggle-replace .chevron {
  transform: rotate(90deg);
}

.find-btn-text {
  border: none;
  border-radius: 6px;
  padding: 5px 10px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 500;
  cursor: default;
  transition: background 0.15s ease, color 0.15s ease;
}

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

/* Match highlights: a third metrics-identical layer under the textarea.
   Text is invisible; only the mark backgrounds show through. */
#find-layer {
  color: transparent;
  pointer-events: none;
}

#find-layer mark {
  color: transparent;
  background: rgba(250, 204, 21, 0.3);
  border-radius: 2px;
}

#find-layer mark.current {
  background: rgba(249, 115, 22, 0.45);
}

:root.dark #find-layer mark {
  background: rgba(202, 138, 4, 0.4);
}

:root.dark #find-layer mark.current {
  background: rgba(234, 88, 12, 0.55);
}

/* ---------- Toast ---------- */
#toast {
  position: fixed;
  bottom: 44px;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  z-index: 300;
  padding: 7px 14px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  font-size: 12.5px;
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

#titlebar-filename {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  pointer-events: none;
  max-width: 50%;
  white-space: nowrap;
  overflow: hidden;
}

#unsaved-label {
  color: var(--text-muted);
  font-weight: 400;
}

#unsaved-label.hidden {
  display: none;
}

/* Window controls — standard Windows caption-button proportions */
#titlebar-controls {
  display: flex;
  align-items: stretch;
  height: 100%;
}

#titlebar-controls button {
  width: 46px;
  height: 100%;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: default;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.1s ease, color 0.1s ease;
}

#titlebar-controls button svg {
  display: block;
}

#titlebar-controls button:hover {
  background: var(--hover);
  color: var(--text);
}

#btn-close:hover {
  background: var(--close-hover);
  color: #fff;
}

/* Maximize button swaps its glyph via .is-maximized on <body> */
#btn-maximize .icon-restore { display: none; }
body.is-maximized #btn-maximize .icon-maximize { display: none; }
body.is-maximized #btn-maximize .icon-restore { display: block; }

/* ---------- Main row: sidebar + editor ---------- */
#main-row {
  display: flex;
  height: calc(100vh - var(--titlebar-h) - var(--statusbar-h));
}

/* ---------- Sidebar (notes library) ---------- */
#sidebar {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: var(--panel-bg);
  border-right: 1px solid var(--border);
  transition: margin-left 0.25s ease, opacity 0.25s ease;
}

#sidebar.collapsed {
  margin-left: -260px;
  opacity: 0;
  pointer-events: none;
}

#sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 12px 6px 16px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.sidebar-tools {
  display: flex;
  align-items: center;
  gap: 2px;
}

.sidebar-tool {
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  cursor: default;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease;
}

.sidebar-tool:hover {
  background: var(--hover);
  color: var(--text);
}

/* ---------- Linked folders (Obsidian vaults etc.) ---------- */
.folder-section {
  margin-top: 8px;
}

.folder-header {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 6px 10px;
  border: none;
  border-radius: 8px;
  background: transparent;
  font-family: var(--ui-font);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  cursor: default;
  transition: background 0.15s ease;
}

.folder-header:hover {
  background: var(--hover);
  color: var(--text-secondary);
}

.folder-header .chevron {
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.folder-section.collapsed-section .chevron {
  transform: rotate(-90deg);
}

.folder-header .folder-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.folder-header .folder-count {
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
}

.folder-unlink {
  margin-left: auto;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 5px;
  background: transparent;
  color: var(--text-muted);
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  transition: opacity 0.15s ease, background 0.15s ease;
}

.folder-header:hover .folder-unlink {
  opacity: 1;
}

.folder-unlink:hover {
  background: var(--hover);
  color: var(--text);
}

.folder-section.collapsed-section .folder-items {
  display: none;
}

/* Nested subfolders inside a linked folder (Obsidian-style tree) */
.subdir-header {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 5px 10px;
  border: none;
  border-radius: 8px;
  background: transparent;
  font-family: var(--ui-font);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: default;
  transition: background 0.15s ease;
}

.subdir-header:hover {
  background: var(--hover);
  color: var(--text);
}

.subdir-header .chevron {
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.subdir-section.collapsed-section > .subdir-header .chevron {
  transform: rotate(-90deg);
}

.subdir-header .subdir-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.subdir-section.collapsed-section > .subdir-items {
  display: none;
}

#notes-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 8px 12px;
  scrollbar-width: none;
}
#notes-list::-webkit-scrollbar {
  display: none;
}

.note-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
  padding: 9px 10px;
  margin-bottom: 2px;
  border: none;
  border-radius: 8px;
  background: transparent;
  text-align: left;
  cursor: default;
  transition: background 0.15s ease;
}

.note-item:hover {
  background: var(--hover);
}

.note-item.current {
  background: var(--hover);
}

.note-name {
  font-family: var(--ui-font);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.note-date {
  font-family: var(--ui-font);
  font-size: 11.5px;
  color: var(--text-muted);
}

.notes-empty {
  padding: 10px;
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- Settings modal ---------- */
#settings-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.15);
}

:root.dark #settings-overlay {
  background: rgba(0, 0, 0, 0.45);
}

#settings-modal {
  width: min(460px, 100%);
  max-height: min(640px, 100%);
  display: flex;
  flex-direction: column;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  animation: fadeInUp 0.2s ease-out;
}

#settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

#btn-settings-close {
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  cursor: default;
  display: flex;
  align-items: center;
  justify-content: center;
}

#btn-settings-close:hover {
  background: var(--hover);
  color: var(--text);
}

#settings-body {
  overflow-y: auto;
  padding: 0 18px 16px;
  scrollbar-width: none;
}
#settings-body::-webkit-scrollbar {
  display: none;
}

.settings-section {
  padding: 10px 0 4px;
}

.settings-section + .settings-section {
  border-top: 1px solid var(--border);
}

.settings-title {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 4px 0 6px;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 7px 0;
}

.settings-row.stack {
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}

/* ---------- Advanced disclosure ---------- */
.advanced-group {
  margin-top: 6px;
}

.advanced-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 6px 0;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 500;
  cursor: default;
}

.advanced-toggle:hover {
  color: var(--text);
}

.advanced-toggle .chevron {
  transition: transform 0.15s ease;
}

.advanced-group:not(.collapsed) .advanced-toggle .chevron {
  transform: rotate(90deg);
}

.advanced-group.collapsed .advanced-body {
  display: none;
}

.advanced-hint {
  font-size: 11.5px;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 4px 0 2px;
}

.custom-font-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.custom-font-name {
  font-size: 12px;
  color: var(--text-secondary);
  max-width: 120px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.custom-input {
  display: flex;
  align-items: center;
  gap: 6px;
}

.custom-input input {
  width: 68px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  background: var(--hover);
  color: var(--text);
  font-family: var(--ui-font);
  font-size: 12.5px;
  text-align: right;
  outline: none;
}

.custom-input input:focus {
  outline: 1px solid var(--accent);
}

/* Hide number-spinner arrows for a cleaner look */
.custom-input input::-webkit-outer-spin-button,
.custom-input input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.custom-unit {
  font-size: 12px;
  color: var(--text-muted);
}

.settings-row.stack .seg {
  display: flex;
}

.settings-row.stack .seg button {
  flex: 1;
}

.settings-label {
  font-size: 13px;
  color: var(--text);
}

.settings-label kbd {
  margin-left: 4px;
}

kbd {
  font-family: var(--ui-font);
  font-size: 10.5px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  white-space: nowrap;
}

/* Segmented control */
.seg {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 2px;
  padding: 2px;
  background: var(--hover);
  border-radius: 8px;
}

.seg button {
  border: none;
  border-radius: 6px;
  padding: 4px 10px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 500;
  cursor: default;
  transition: background 0.15s ease, color 0.15s ease;
}

.seg button:hover {
  color: var(--text);
}

.seg button.selected {
  background: var(--panel-bg);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

/* Stepper */
.stepper {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  background: var(--hover);
  border-radius: 8px;
}

.stepper button {
  width: 26px;
  height: 24px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: default;
}

.stepper button:hover {
  background: var(--panel-bg);
  color: var(--text);
}

.stepper span {
  min-width: 44px;
  text-align: center;
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
}

/* Toggle switch */
.toggle {
  position: relative;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
  border: none;
  border-radius: 10px;
  background: var(--border);
  cursor: default;
  transition: background 0.2s ease;
}

.toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--panel-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease;
}

.toggle.on {
  background: var(--accent);
}

.toggle.on::after {
  transform: translateX(16px);
}

/* Small text button */
.settings-btn {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 12px;
  background: transparent;
  color: var(--text);
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 500;
  cursor: default;
  white-space: nowrap;
  transition: background 0.15s ease;
}

.settings-select {
  max-width: 13rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 8px;
  background: transparent;
  color: var(--text);
  font-family: var(--ui-font);
  font-size: 12px;
  outline: none;
}
.settings-select:focus { border-color: var(--accent); }
.settings-select option { background: var(--bg); color: var(--text); }

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

/* Shortcuts grid */
#shortcuts-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 7px 16px;
  padding: 2px 0 6px;
  font-size: 12.5px;
  color: var(--text-secondary);
}

#shortcuts-grid span:nth-child(even) {
  text-align: right;
}

/* ---------- Editor Area ---------- */
#editor-area {
  flex: 1;
  min-width: 0;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  scrollbar-width: none;
}
#editor-area::-webkit-scrollbar {
  display: none;
}

#editor-wrapper {
  position: relative;
  min-height: 100%;
  padding-top: var(--editor-top);
  padding-bottom: 50vh; /* runway: lets the last line scroll up to center */
}

/* Typewriter mode: bump the top offset to 50vh so there's runway ABOVE the
   text too. Without this, lines near the top of a document can't reach the
   vertical center (scrollTop clamps at 0) and the mode looks like it does
   nothing. All four editor layers key off --editor-top, so they move together
   and stay aligned. */
:root.typewriter-mode {
  --editor-top: 50vh;
}

/* ---------- Shared metrics for the layered editor ----------
   The backdrop (styled markdown), the textarea (transparent text +
   native caret) and the caret-measuring mirror must render text with
   IDENTICAL geometry or the layers drift. Never add anything here
   that changes glyph advance widths. */
#backdrop,
#editor,
#caret-mirror,
#find-layer {
  position: absolute;
  top: var(--editor-top);
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--editor-column);
  padding: 0 1.5rem;
  font-family: var(--editor-font);
  font-size: var(--editor-size);
  line-height: var(--editor-lh);
  font-kerning: none;
  font-variant-ligatures: none;
  letter-spacing: 0;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
  min-height: 100%;
}

#backdrop {
  color: var(--text);
  pointer-events: none;
}

#editor {
  color: transparent;
  caret-color: var(--caret);
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  overflow: hidden;
}

#caret-mirror {
  visibility: hidden;
  pointer-events: none;
}

#editor::placeholder {
  color: var(--text-muted);
}

#editor::selection {
  color: transparent;
  background: var(--selection-bg);
}

/* ---------- Status Bar ---------- */
#statusbar {
  height: var(--statusbar-h);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 16px;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  position: relative;
  z-index: 10;
}

.status-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-mode {
  color: var(--text-muted);
}

.status-mode.hidden {
  display: none;
}

/* ---------- Chrome hide/show ---------- */
.chrome {
  opacity: 1;
  transition: opacity 0.6s ease;
}

.chrome.hidden-chrome {
  opacity: 0;
  pointer-events: none;
  transition-delay: 0.15s;
}

/* ---------- Focus mode ---------- */
.focus-mode .md-line {
  opacity: 0.25;
  transition: opacity 0.3s ease;
}

.focus-mode .focus-active {
  opacity: 1;
}

/* ---------- Markdown syntax highlight (iA style) ----------
   Headings are bold in the text color — not tinted. Syntax characters
   recede to the muted gray. Nothing here may alter glyph widths. */
.md-h1, .md-h2, .md-h3, .md-h4, .md-h5, .md-h6 {
  font-weight: 700;
}

.md-bold {
  font-weight: 700;
}

.md-italic {
  font-style: italic;
}

.md-code {
  background: var(--code-bg);
  border-radius: 3px;
}

.md-quote {
  color: var(--text-secondary);
  font-style: italic;
}

.md-strike {
  text-decoration: line-through;
  color: var(--text-secondary);
}

.md-list-marker {
  color: var(--accent);
}

.md-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.md-syntax {
  color: var(--text-muted);
  font-style: normal;
}

/* Proportional editor fonts (Georgia, Times): bold/italic glyphs are wider
   than regular ones, which would drift the backdrop off the caret. Styling
   falls back to color-only. */
:root.proportional-font .md-h1,
:root.proportional-font .md-h2,
:root.proportional-font .md-h3,
:root.proportional-font .md-h4,
:root.proportional-font .md-h5,
:root.proportional-font .md-h6 {
  font-weight: 400;
  color: var(--accent);
}

:root.proportional-font .md-bold {
  font-weight: 400;
  color: var(--accent);
}

:root.proportional-font .md-italic,
:root.proportional-font .md-quote {
  font-style: normal;
}

:root.proportional-font .md-syntax {
  color: var(--text-muted);
}

/* ---------- Preview ---------- */
#preview {
  padding: 3rem 1.5rem;
  margin: 0 auto;
  max-width: 65ch;
  font-family: var(--preview-font);
  font-size: var(--preview-size);
  line-height: 1.75;
  color: var(--text);
  user-select: text;
  -webkit-user-select: text;
}

#preview.hidden {
  display: none;
}

#preview h1, #preview h2, #preview h3, #preview h4, #preview h5, #preview h6 {
  font-family: var(--ui-font);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

#preview h1 { font-size: 1.9em; margin: 2.5rem 0 2rem; }
#preview h2 { font-size: 1.4em; margin: 1.5rem 0 1.4rem; }
#preview h3 { font-size: 1.15em; margin: 1rem 0 1rem; }
#preview h4, #preview h5, #preview h6 { font-size: 1em; margin: 1rem 0 0.75rem; }

#preview > :first-child {
  margin-top: 0;
}

#preview p {
  margin: 0.85em 0;
}

#preview code {
  font-family: var(--editor-font);
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.15em 0.35em;
  border-radius: 4px;
}

#preview pre {
  background: var(--code-bg);
  padding: 1em;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.25em 0;
}

#preview pre code {
  background: none;
  padding: 0;
}

#preview blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1em;
  margin: 1.25em 0;
  color: var(--text-secondary);
  font-style: italic;
}

#preview a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

#preview ul, #preview ol {
  padding-left: 1.5em;
  margin: 1em 0;
}

#preview li {
  margin: 0.4em 0;
}

#preview hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5em auto;
  width: 8rem;
}

#preview img {
  max-width: 100%;
  border-radius: 6px;
}

/* Local image embed that couldn't be resolved on disk */
.img-missing {
  display: inline-block;
  padding: 0.3em 0.6em;
  border: 1px dashed var(--border);
  border-radius: 6px;
  font-size: 0.85em;
  font-style: italic;
  color: var(--text-muted);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.3s ease-out;
}

/* ---------- Hidden utility ---------- */
.hidden {
  display: none !important;
}