/* ============================================================
 * GravityUI-Inspired Markdown Editor
 * ============================================================ */

:root {
  /* ── Base surfaces */
  --g-bg:          #0d0d0f;
  --g-surface:     #141417;
  --g-float:       #1c1c22;
  --g-hover:       rgba(255, 255, 255, 0.04);
  --g-active:      rgba(255, 255, 255, 0.08);

  /* ── Text */
  --g-text:        #ededed;
  --g-text-2:      #9494a8;
  --g-text-3:      #52526a;

  /* ── Accent — GravityUI indigo */
  --g-accent:        #6366f1;
  --g-accent-light:  #818cf8;
  --g-accent-dim:    rgba(99, 102, 241, 0.12);
  --g-accent-border: rgba(99, 102, 241, 0.38);

  /* ── Semantic */
  --g-success:     #22c55e;
  --g-success-dim: rgba(34, 197, 94, 0.12);
  --g-danger:      #ef4444;
  --g-link:        #818cf8;
  --g-code-color:  #e879f9;

  /* ── Borders */
  --g-border:       rgba(255, 255, 255, 0.07);
  --g-border-2:     rgba(255, 255, 255, 0.12);
  --g-border-focus: rgba(99, 102, 241, 0.45);

  /* ── Radius */
  --r-xs:  3px;
  --r-sm:  5px;
  --r-md:  8px;
  --r-lg:  12px;
  --r-xl:  16px;

  /* ── Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* ── Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.35);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.45);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.55);

  /* ── Transitions */
  --t-fast: 0.12s ease;
  --t-base: 0.18s ease;
}

/* ── Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { height: 100%; height: 100dvh; }

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  background: var(--g-bg);
  color: var(--g-text);
  height: 100%;
  height: 100dvh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================================
 * Layout shell
 * ============================================================ */
.editor-layout {
  display: flex;
  flex-direction: column;
  height: 100%;
  height: 100dvh;
  overflow: hidden;
  background: var(--g-bg);
}

/* ============================================================
 * Header
 * ============================================================ */
.editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 52px;
  min-height: 52px;
  padding: 0 16px;
  background: var(--g-surface);
  border-bottom: 1px solid var(--g-border);
  z-index: 20;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.back-btn {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--g-border);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--g-text-2);
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.back-btn:hover {
  background: var(--g-hover);
  color: var(--g-text);
  border-color: var(--g-border-2);
}

.header-title {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  font-weight: 600;
  color: var(--g-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-icon {
  color: var(--g-accent);
  font-size: 12px;
  flex-shrink: 0;
}

/* ── Mode tabs (center) */
.mode-tabs {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--g-bg);
  border: 1px solid var(--g-border);
  border-radius: var(--r-md);
  padding: 3px;
  flex-shrink: 0;
}

.mode-tab {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border: none;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--g-text-2);
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), box-shadow var(--t-fast);
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.mode-tab:hover  { background: var(--g-hover); color: var(--g-text); }
.mode-tab.active {
  background: var(--g-float);
  color: var(--g-text);
  box-shadow: var(--shadow-sm);
}

/* ── Header right actions */
.header-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: flex-end;
}

.header-btn {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--g-border);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--g-text-2);
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  -webkit-tap-highlight-color: transparent;
}
.header-btn:hover  { background: var(--g-hover); color: var(--g-text); border-color: var(--g-border-2); }
.header-btn.active {
  background: var(--g-accent-dim);
  color: var(--g-accent-light);
  border-color: var(--g-accent-border);
}

/* ============================================================
 * Toolbar
 * ============================================================ */
.editor-toolbar {
  background: var(--g-surface);
  border-bottom: 1px solid var(--g-border);
  z-index: 15;
  overflow: hidden;
  flex-shrink: 0;
}

.toolbar-scroll {
  display: flex;
  align-items: center;
  padding: 6px 12px;
  gap: 1px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
}
.toolbar-scroll::-webkit-scrollbar { display: none; }

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 1px;
  flex-shrink: 0;
}

.toolbar-sep {
  width: 1px;
  height: 18px;
  background: var(--g-border);
  margin: 0 5px;
  flex-shrink: 0;
}

.toolbar-btn {
  min-width: 32px;
  height: 30px;
  padding: 0 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  border: none;
  border-radius: var(--r-xs);
  background: transparent;
  color: var(--g-text-2);
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
  white-space: nowrap;
  flex-shrink: 0;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
.toolbar-btn:hover  { background: var(--g-hover); color: var(--g-text); }
.toolbar-btn:active { background: var(--g-active); }
.toolbar-btn.is-active { background: var(--g-accent-dim); color: var(--g-accent-light); }

/* Text-only toolbar buttons (H1/H2/H3) */
.toolbar-text-btn {
  min-width: 30px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: -0.02em;
}

/* ============================================================
 * Editor body
 * ============================================================ */
.editor-body {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

.editor-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  position: relative;
}

/* Pane label (shown in split mode) */
.pane-label {
  display: none;
  padding: 5px 16px 4px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--g-text-3);
  background: var(--g-surface);
  border-bottom: 1px solid var(--g-border);
  flex-shrink: 0;
}

/* Resizable divider */
.editor-divider {
  width: 1px;
  background: var(--g-border);
  flex-shrink: 0;
  display: none;
  cursor: col-resize;
  transition: background var(--t-fast);
}
.editor-divider:hover { background: var(--g-border-2); }

/* ── CodeMirror 6 host */
.cm-host {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Outer CM shell */
.cm-host .cm-editor {
  flex: 1;
  height: 100%;
  background: var(--g-bg);
  color: var(--g-text);
  outline: none;
}

/* Scroll area */
.cm-host .cm-scroller {
  padding: 28px 32px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.75;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}
.cm-host .cm-scroller::-webkit-scrollbar { width: 5px; }
.cm-host .cm-scroller::-webkit-scrollbar-track { background: transparent; }
.cm-host .cm-scroller::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
.cm-host .cm-scroller::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }

/* Content editable area */
.cm-host .cm-content {
  caret-color: var(--g-accent-light);
  padding: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Lines */
.cm-host .cm-line { padding: 0; }

/* YAML frontmatter — reset heading sizes applied by syntax highlighter inner spans */
.cm-host .cm-yaml-frontmatter,
.cm-host .cm-yaml-frontmatter * {
  font-size: 1em !important;
  font-weight: 400 !important;
  color: rgba(255,255,255,0.45) !important;
}

/* Cursor */
.cm-host .cm-cursor { border-left: 2px solid var(--g-accent-light) !important; }

/* Selection */
.cm-host .cm-selectionBackground { background: rgba(99,102,241,0.2) !important; }
.cm-host.cm-focused .cm-selectionBackground { background: rgba(99,102,241,0.25) !important; }
.cm-host .cm-focused .cm-selectionBackground { background: rgba(99,102,241,0.25); }

/* Active line highlight */
.cm-host .cm-activeLine { background: rgba(255,255,255,0.018); }

/* Placeholder */
.cm-host .cm-placeholder { color: var(--g-text-3); font-style: normal; }

/* ── WYSIWYG inline decoration classes ─────────────────────────── */
/* Applied by the ViewPlugin when cursor is NOT on the line        */

/* Headings — hide the # markers, enlarge remaining text */
.cm-host .cm-md-h1 { font-size: 1.65em; font-weight: 700; font-family: var(--font-sans); color: #fff; }
.cm-host .cm-md-h2 { font-size: 1.38em; font-weight: 700; font-family: var(--font-sans); color: #fff; }
.cm-host .cm-md-h3 { font-size: 1.16em; font-weight: 600; font-family: var(--font-sans); color: #fff; }
.cm-host .cm-md-h4 { font-size: 1.05em; font-weight: 600; font-family: var(--font-sans); color: var(--g-text); }
.cm-host .cm-md-h5 { font-weight: 600; font-family: var(--font-sans); color: var(--g-text-2); }
.cm-host .cm-md-h6 { font-weight: 600; font-family: var(--font-sans); color: var(--g-text-3); }

/* Inline formatting */
.cm-host .cm-md-bold   { font-weight: 700; color: #fff; }
.cm-host .cm-md-italic { font-style: italic; }
.cm-host .cm-md-strike { text-decoration: line-through; color: var(--g-text-2); }

/* Inline code — show as styled token */
.cm-host .cm-md-code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: #e879f9;
  background: rgba(232, 121, 249, 0.1);
  border-radius: var(--r-xs);
  padding: 0.1em 0.35em;
}

/* Links */
.cm-host .cm-md-link { color: var(--g-link); text-decoration: underline; text-underline-offset: 2px; cursor: pointer; }

/* When cursor IS on the line — dim the visible markers */
.cm-host .cm-line .tok-meta,
.cm-host .cm-line .tok-punctuation { color: var(--g-text-3); }

/* Blockquote border */
.cm-host .cm-md-quote {
  border-left: 3px solid var(--g-accent);
  padding-left: 12px;
  color: var(--g-text-2);
  font-style: italic;
}

/* Code block background */
.cm-host .cm-md-codeblock {
  background: var(--g-float);
  border-radius: var(--r-xs);
  padding: 2px 8px;
  color: var(--g-text);
}

/* Horizontal rule — visual divider line replacing the --- */
.cm-host .cm-md-hr-line {
  border-bottom: 1px solid var(--g-border-2);
  display: block;
  height: 0;
  overflow: hidden;
  font-size: 0;
  line-height: 0;
}

/* Loading state before CM6 initialises */
.cm-host:empty::before {
  content: 'Loading editor…';
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--g-text-3);
  font-size: 13px;
  font-family: var(--font-sans);
}

/* ── Preview pane */
.preview-pane {
  background: var(--g-bg);
}

.preview-scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.preview-scroll::-webkit-scrollbar { width: 5px; }
.preview-scroll::-webkit-scrollbar-track { background: transparent; }
.preview-scroll::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
.preview-scroll::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }

.preview-content {
  padding: 28px 32px;
  max-width: 780px;
  min-height: 100%;
}

/* ── Preview empty state */
.preview-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  height: 200px;
  color: var(--g-text-3);
  font-size: 13px;
}
.preview-empty svg { width: 36px; height: 36px; opacity: 0.3; }

/* ── Preview typography */
.preview-content > *:first-child { margin-top: 0; }
.preview-content > *:last-child  { margin-bottom: 0; }

.preview-content h1,
.preview-content h2,
.preview-content h3,
.preview-content h4,
.preview-content h5,
.preview-content h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--g-text);
  margin: 1.6em 0 0.5em;
}
.preview-content h1 { font-size: 1.875em; border-bottom: 1px solid var(--g-border); padding-bottom: 0.4em; }
.preview-content h2 { font-size: 1.5em;   border-bottom: 1px solid var(--g-border); padding-bottom: 0.35em; }
.preview-content h3 { font-size: 1.2em; }
.preview-content h4 { font-size: 1.05em; }
.preview-content h5, .preview-content h6 { font-size: 0.95em; color: var(--g-text-2); }

.preview-content p { margin: 0 0 1em; }
.preview-content p:last-child { margin-bottom: 0; }

.preview-content a { color: var(--g-link); text-decoration: underline; text-underline-offset: 2px; }
.preview-content a:hover { color: var(--g-accent); }

.preview-content strong { font-weight: 700; color: #fff; }
.preview-content em { font-style: italic; }
.preview-content del { text-decoration: line-through; color: var(--g-text-3); }

.preview-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--g-code-color);
  background: var(--g-float);
  padding: 0.15em 0.45em;
  border-radius: var(--r-xs);
  border: 1px solid var(--g-border);
}

.preview-content pre {
  background: var(--g-float);
  border: 1px solid var(--g-border);
  border-radius: var(--r-md);
  padding: 16px 20px;
  overflow-x: auto;
  margin: 1em 0;
}
.preview-content pre code {
  background: none;
  border: none;
  color: var(--g-text);
  padding: 0;
  font-size: 13px;
  line-height: 1.7;
}

.preview-content blockquote {
  border-left: 3px solid var(--g-accent);
  padding: 6px 0 6px 16px;
  margin: 1em 0;
  color: var(--g-text-2);
}
.preview-content blockquote p { margin: 0; font-style: italic; }

.preview-content ul, .preview-content ol {
  margin: 0.75em 0 0.75em 1.5em;
}
.preview-content li { margin: 0.3em 0; }
.preview-content li > ul, .preview-content li > ol { margin-top: 0.3em; margin-bottom: 0; }

.preview-content hr {
  border: none;
  border-top: 1px solid var(--g-border-2);
  margin: 2em 0;
}

.preview-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
  font-size: 13.5px;
}
.preview-content th, .preview-content td {
  border: 1px solid var(--g-border);
  padding: 8px 14px;
  text-align: left;
}
.preview-content th {
  background: var(--g-float);
  font-weight: 600;
  font-size: 12.5px;
  color: var(--g-text-2);
  letter-spacing: 0.02em;
}
.preview-content tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

.preview-content img {
  max-width: 100%;
  border-radius: var(--r-md);
  border: 1px solid var(--g-border);
}

/* Task list */
.preview-content input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--g-border-2);
  border-radius: 3px;
  background: transparent;
  cursor: default;
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
}
.preview-content input[type="checkbox"]:checked {
  background: var(--g-accent);
  border-color: var(--g-accent);
}
.preview-content input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 3px; top: 1px;
  width: 5px; height: 8px;
  border: 1.5px solid #fff;
  border-top: none; border-left: none;
  transform: rotate(42deg);
}

/* ============================================================
 * Mode states
 * ============================================================ */

/* Default: markup only */
.editor-layout[data-mode="markup"] .markup-pane   { display: flex; }
.editor-layout[data-mode="markup"] .preview-pane  { display: none; }
.editor-layout[data-mode="markup"] .editor-divider { display: none; }
.editor-layout[data-mode="markup"] .pane-label    { display: none; }

/* Preview only */
.editor-layout[data-mode="preview"] .markup-pane   { display: none; }
.editor-layout[data-mode="preview"] .preview-pane  { display: flex; }
.editor-layout[data-mode="preview"] .editor-divider { display: none; }
.editor-layout[data-mode="preview"] .pane-label    { display: none; }

/* Split */
.editor-layout[data-mode="split"] .markup-pane   { display: flex; }
.editor-layout[data-mode="split"] .preview-pane  { display: flex; }
.editor-layout[data-mode="split"] .editor-divider { display: block; }
.editor-layout[data-mode="split"] .pane-label    { display: block; }

/* Center preview prose in preview-only mode */
.editor-layout[data-mode="preview"] .preview-content {
  margin: 0 auto;
}

/* ============================================================
 * Status bar
 * ============================================================ */
.editor-statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 26px;
  min-height: 26px;
  padding: 0 16px;
  background: var(--g-surface);
  border-top: 1px solid var(--g-border);
  flex-shrink: 0;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 5px;
}

.status-item {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--g-text-3);
  white-space: nowrap;
}

.status-sep {
  font-size: 10px;
  color: var(--g-border-2);
  user-select: none;
}

.status-saved {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10.5px;
  transition: color var(--t-base), opacity var(--t-base);
}
.status-saved.is-saving  { color: var(--g-text-3); }
.status-saved.is-saved   { color: var(--g-success); }
.status-saved svg { width: 10px; height: 10px; }

/* ============================================================
 * Toast
 * ============================================================ */
.toast {
  position: fixed;
  bottom: 44px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--g-float);
  color: var(--g-text);
  border: 1px solid var(--g-border-2);
  border-radius: var(--r-md);
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  white-space: nowrap;
  backdrop-filter: blur(12px);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============================================================
 * Vault Panel
 * ============================================================ */

/* Overlay backdrop */
.vault-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 49;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
  backdrop-filter: blur(2px);
}
.vault-overlay.is-open {
  opacity: 1;
  pointer-events: all;
}

/* Panel slide-out */
.vault-panel {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 300px;
  max-width: 85vw;
  background: var(--g-surface);
  border-right: 1px solid var(--g-border);
  z-index: 50;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: var(--shadow-lg);
}
.vault-panel.is-open {
  transform: translateX(0);
}

/* Panel header */
.vault-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  height: 52px;
  min-height: 52px;
  padding: 0 14px;
  border-bottom: 1px solid var(--g-border);
  flex-shrink: 0;
}

.vault-panel-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--g-text);
}
.vault-panel-title svg {
  width: 15px;
  height: 15px;
  color: var(--g-accent);
  flex-shrink: 0;
}

.vault-panel-close {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--g-text-2);
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  flex-shrink: 0;
}
.vault-panel-close:hover {
  background: var(--g-hover);
  color: var(--g-text);
  border-color: var(--g-border);
}

/* Search bar */
.vault-search-wrap {
  padding: 10px 12px;
  border-bottom: 1px solid var(--g-border);
  flex-shrink: 0;
  position: relative;
}
.vault-search-wrap > svg {
  position: absolute;
  left: 21px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--g-text-3);
  pointer-events: none;
  z-index: 1;
}

.vault-search {
  width: 100%;
  height: 32px;
  padding: 0 10px 0 30px;
  background: var(--g-bg);
  border: 1px solid var(--g-border);
  border-radius: var(--r-sm);
  color: var(--g-text);
  font-family: var(--font-sans);
  font-size: 13px;
  outline: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  -webkit-appearance: none;
  position: relative;
}
.vault-search::placeholder { color: var(--g-text-3); }
.vault-search:focus {
  border-color: var(--g-border-focus);
  box-shadow: 0 0 0 2px var(--g-accent-dim);
}

/* Tree scroll container */
.vault-tree {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 6px 6px 12px;
}
.vault-tree::-webkit-scrollbar { width: 4px; }
.vault-tree::-webkit-scrollbar-track { background: transparent; }
.vault-tree::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 2px; }
.vault-tree::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }

/* Directory rows */
.vt-dir { }

.vt-dir-row {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: var(--r-xs);
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--g-text-2);
  transition: background var(--t-fast), color var(--t-fast);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.vt-dir-row:hover {
  background: var(--g-hover);
  color: var(--g-text);
}

.vt-arrow {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--g-text-3);
  transition: transform var(--t-fast), color var(--t-fast);
}
.vt-dir.is-open > .vt-dir-row .vt-arrow {
  transform: rotate(90deg);
  color: var(--g-text-2);
}

.vt-dir-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--g-accent);
  opacity: 0.75;
  transition: opacity var(--t-fast);
}
.vt-dir-row:hover .vt-dir-icon { opacity: 1; }

.vt-dir-name {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.vt-dir-children {
  display: none;
  padding-left: 14px;
}
.vt-dir.is-open > .vt-dir-children {
  display: block;
}

/* File rows */
.vt-file {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px 4px 22px;
  border-radius: var(--r-xs);
  cursor: pointer;
  font-size: 12.5px;
  color: var(--g-text-2);
  transition: background var(--t-fast), color var(--t-fast);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.vt-file:hover {
  background: var(--g-hover);
  color: var(--g-text);
}
.vt-file.is-active {
  background: var(--g-accent-dim);
  color: var(--g-accent-light);
  font-weight: 500;
}
.vt-file.is-active:hover {
  background: rgba(99, 102, 241, 0.18);
}

.vt-file-icon {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  color: var(--g-text-3);
  transition: color var(--t-fast);
}
.vt-file:hover .vt-file-icon { color: var(--g-text-2); }
.vt-file.is-active .vt-file-icon { color: var(--g-accent-light); }

.vt-file-name {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* States */
.vault-loading,
.vault-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 32px 16px;
  color: var(--g-text-3);
  font-size: 12.5px;
  text-align: center;
}
.vault-error { color: var(--g-danger); }
.vault-loading::before {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid var(--g-border);
  border-top-color: var(--g-accent);
  border-radius: 50%;
  animation: vault-spin 0.7s linear infinite;
}
@keyframes vault-spin {
  to { transform: rotate(360deg); }
}

/* New file button in panel footer */
.vault-panel-footer {
  padding: 10px 12px;
  border-top: 1px solid var(--g-border);
  flex-shrink: 0;
}
.vault-new-btn {
  width: 100%;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px dashed var(--g-border-2);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--g-text-3);
  font-family: var(--font-sans);
  font-size: 12.5px;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.vault-new-btn:hover {
  background: var(--g-hover);
  color: var(--g-text-2);
  border-color: var(--g-border-2);
  border-style: solid;
}

/* Inline new-file input row */
.vault-new-input-row {
  display: flex;
  align-items: center;
  gap: 4px;
}
.vault-new-input-row .vault-search {
  flex: 1;
  min-width: 0;
  font-size: 12px;
  padding-left: 10px;
}
.vault-new-confirm,
.vault-new-cancel {
  width: 28px;
  height: 32px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--g-border);
  border-radius: var(--r-sm);
  background: transparent;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.vault-new-confirm { color: var(--g-success); }
.vault-new-confirm:hover { background: var(--g-success-dim); border-color: var(--g-success); }
.vault-new-cancel  { color: var(--g-text-3); }
.vault-new-cancel:hover  { background: var(--g-hover); color: var(--g-text-2); border-color: var(--g-border-2); }

/* ============================================================
 * Fullscreen
 * ============================================================ */
.editor-layout.fullscreen {
  position: fixed;
  inset: 0;
  z-index: 9999;
}

/* ============================================================
 * Mobile — max-width: 768px
 * ============================================================ */
@media (max-width: 768px) {
  /* Hide split mode tab on mobile */
  .mode-tab[data-mode="split"] { display: none; }

  .editor-header {
    height: 48px;
    min-height: 48px;
    padding: 0 12px;
  }

  /* Hide text label on very small headers */
  .header-title > span:last-child { display: none; }

  .mode-tab {
    padding: 5px 10px;
    font-size: 12px;
    gap: 4px;
  }
  /* Hide icon in mode tabs on mobile to save space */
  .mode-tab svg { display: none; }

  .header-btn { width: 36px; height: 36px; }

  /* Taller toolbar touch targets */
  .toolbar-btn {
    min-width: 40px;
    height: 38px;
    padding: 0 8px;
  }
  .toolbar-scroll { padding: 5px 10px; }

  /* Full-width editor on mobile */
  .cm-host .cm-scroller {
    padding: 16px;
    font-size: 15px; /* prevent iOS auto-zoom */
    line-height: 1.65;
  }

  .preview-content {
    padding: 16px;
    font-size: 15px;
  }

  .editor-statusbar {
    height: 30px;
    min-height: 30px;
    padding: 0 12px;
  }

  /* Fewer status items on mobile */
  #lineCount { display: none; }
}

/* ── Extra small phones */
@media (max-width: 420px) {
  .editor-header { padding: 0 10px; gap: 8px; }
  .header-right .header-btn:nth-child(3) { display: none; } /* hide fullscreen */
}

/* ── Safe area insets (notch / home indicator) */
@supports (padding-top: env(safe-area-inset-top)) {
  .editor-header {
    padding-top: env(safe-area-inset-top);
    height: calc(52px + env(safe-area-inset-top));
    min-height: calc(52px + env(safe-area-inset-top));
  }
  .editor-statusbar {
    padding-bottom: env(safe-area-inset-bottom);
    height: calc(26px + env(safe-area-inset-bottom));
    min-height: calc(26px + env(safe-area-inset-bottom));
  }

  @media (max-width: 768px) {
    .editor-header {
      height: calc(48px + env(safe-area-inset-top));
      min-height: calc(48px + env(safe-area-inset-top));
    }
  }
}

/* ── Landscape phones */
@media (max-height: 500px) and (max-width: 900px) {
  .editor-header  { height: 44px; min-height: 44px; }
  .editor-toolbar .toolbar-btn { height: 32px; }
  .cm-host .cm-scroller { padding: 12px 16px; }
  .preview-content { padding: 12px 16px; }
}