/*
 * Global UI design tokens and base element styling shared by all MCP tool apps. It establishes color, spacing, typography, and accessibility-friendly defaults.
 */
:root {
  color-scheme: light dark;

  /* Spec variables with light-dark() fallbacks (following customer-segmentation pattern).
     When a host provides --color-* via applyHostStyleVariables, the var() picks it up;
     otherwise the light-dark() fallback keeps the UI legible. */
  --bg: transparent;
  --panel: var(--color-background-primary, light-dark(#ffffff, #1e1e2e));
  --panel-subtle: var(--color-background-tertiary, light-dark(#f5f5f5, #2a2a3c));
  --panel-muted: var(--color-background-tertiary, light-dark(#f5f5f5, #2a2a3c));
  --text: var(--color-text-primary, light-dark(#1a1a2e, #e4e4ef));
  --text-secondary: var(--color-text-secondary, light-dark(#4a4a5a, #a0a0b8));
  --muted: var(--color-text-tertiary, light-dark(#94a3b8, #64748b));
  --border: var(--color-border-primary, light-dark(#e2e8f0, #334155));
  --accent: var(--color-text-info, light-dark(#2563eb, #60a5fa));
  --accent-hover: var(--color-text-info, var(--accent));
  --accent-soft: var(--color-background-info, var(--panel-subtle));
  --focus-ring: var(--color-border-primary, var(--accent));
  --shadow-sm: var(--shadow-sm, none);
  --success-bg: var(--color-background-success, var(--panel-subtle));
  --success-border: var(--color-border-success, var(--border));
  --success-text: var(--color-text-success, light-dark(#059669, #34d399));
  --error-bg: var(--color-background-danger, var(--panel-subtle));
  --error-border: var(--color-border-danger, var(--border));
  --error-text: var(--color-text-danger, light-dark(#dc2626, #f87171));
  --warning-bg: var(--color-background-warning, var(--panel-subtle));
  --warning-border: var(--color-border-warning, var(--border));
  --warning-text: var(--color-text-warning, light-dark(#d97706, #fbbf24));
}

html {
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans, system-ui, sans-serif);
  max-height: 32px;
  overflow: hidden;
}

body.dc-ready {
  max-height: none;
  overflow: auto;
  overflow: clip;
}

#app {
  min-height: 0;
}

.shell {
  max-width: none;
  margin: 0;
  padding: 6px;
}

.tool-shell.collapsed .panel {
  display: none;
}

.hidden {
  display: none !important;
}


.compact-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 2px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1;
  user-select: none;
}

.compact-row--ready {
  cursor: pointer;
  border-radius: 8px;
  transition: color 150ms ease;
}

.compact-row--ready:hover {
  color: var(--text-secondary);
}

.compact-row--ready:hover .compact-chevron {
  color: var(--text-secondary);
}

.compact-chevron {
  width: 14px;
  height: 14px;
  fill: currentColor;
  color: var(--muted);
  flex-shrink: 0;
  transition: transform 200ms ease, color 150ms ease;
}

.tool-shell.expanded .compact-chevron {
  transform: rotate(90deg);
}

.compact-label {
  color: inherit;
}

.compact-filename {
  color: var(--text);
  font-weight: 600;
}

.compact-row--ready .compact-label::after {
  content: ' · ';
}

.compact-row--loading {
  animation: fade-pulse 1.5s ease-in-out infinite;
}

@keyframes fade-pulse {
  0%,
  100% {
    opacity: 0.5;
  }

  50% {
    opacity: 1;
  }
}


/*
 * App-specific styling for File Preview — tuned to blend with Claude's UI.
 */
:root {
  --code-bg: var(--panel);
  --code-text: var(--color-text-primary, var(--text));
  --hljs-keyword: light-dark(#8b5cf6, #a78bfa);
  --hljs-string: var(--color-text-success, light-dark(#059669, #34d399));
  --hljs-comment: var(--color-text-tertiary, light-dark(#94a3b8, #64748b));
  --hljs-type: var(--color-text-info, light-dark(#0f766e, #5eead4));
  --hljs-number: var(--color-text-warning, light-dark(#b45309, #fbbf24));
  --hljs-attr: var(--color-text-info, light-dark(#2563eb, #60a5fa));
  --hljs-built-in: light-dark(#6366f1, #818cf8);
  --hljs-tag: var(--color-text-info, light-dark(#0ea5a8, #67e8f9));
  --content-height: 920px;
  --markdown-text: var(--text);
  --markdown-muted: var(--text-secondary);
  --inline-code-bg: var(--panel-subtle);
  --inline-code-border: var(--border);
  --inline-code-text: var(--text);
  --notice-bg: var(--panel-subtle);
  --notice-border: var(--border);
  --notice-text: var(--text-secondary);
  --toc-rail-width: 320px;
}

/* ── Panel (Claude-style card) ── */

.panel {
  margin-top: 6px;
  border: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
  border-radius: 16px;
  background: var(--panel);
  overflow: hidden;
}

/* Panel background comes directly from host --color-background-primary.
   No dark-mode adjustment — the host provides the correct color. */

.tool-shell.collapsed .panel { display: none; }

/* When the host hides the summary row (hideSummaryRow: true), it means the host
   provides its own outer frame/card. Strip inner chrome so only content remains. */
html:has(.fullscreen) {
  height: 100%;
}

html:has(.fullscreen) body {
  height: 100%;
  display: flex;
  flex-direction: column;
}

html:has(.fullscreen) #app {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tool-shell.fullscreen {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tool-shell.fullscreen .panel {
  margin-top: 0;
  border: none;
  border-radius: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tool-shell.fullscreen {
  --content-height: 89vh;
}

.tool-shell.fullscreen .panel-content-wrapper {
  flex: 1;
}

.tool-shell.host-framed .compact-row { display: none; }
.tool-shell.host-framed .panel {
  margin-top: 0;
  border: none;
  border-radius: 0;
  background: transparent;
}
.tool-shell.host-framed .panel-breadcrumb { display: none; }
.tool-shell.host-framed .panel-footer { display: none; }
.tool-shell.host-framed .panel { position: relative; }
.tool-shell.host-framed .panel-topbar {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 10;
  width: auto;
  opacity: 0;
  transition: opacity 0.2s ease 1.5s;
  pointer-events: none;
  padding: 4px 8px;
  gap: 6px;
  background: var(--panel);
  border-radius: 0 0 0 var(--border-radius-md, 6px);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}
.tool-shell.host-framed .panel:hover .panel-topbar,
.tool-shell.host-framed .panel:focus-within .panel-topbar {
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.2s ease;
}
.tool-shell.host-framed .panel-content-wrapper { max-height: none; overflow: hidden; }
.tool-shell.host-framed .image-content { background: transparent; }

/* ── Top bar ── */

.panel-topbar {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
  overflow: visible;
}

.panel-breadcrumb {
  font-size: 13px;
  color: var(--text-secondary);
  direction: rtl;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 0 1 auto;
  max-width: 50%;
  min-width: 0;
}

.breadcrumb-sep {
  color: color-mix(in srgb, var(--muted) 50%, transparent);
  margin: 0 2px;
}

.panel-topbar-actions {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
  margin-left: auto;
}

.panel-action {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  background: none;
  border: none;
  border-radius: 8px;
  padding: 5px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 150ms ease, background 150ms ease;
  line-height: 1.4;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.panel-action:hover {
  color: var(--text);
  background: var(--panel-subtle);
}

.panel-action--primary {
  color: var(--text);
  background: color-mix(in srgb, var(--panel-subtle) 72%, var(--border) 28%);
}

.panel-action--primary:hover {
  background: color-mix(in srgb, var(--panel-subtle) 58%, var(--border) 42%);
}

.panel-action:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.panel-action svg { flex-shrink: 0; opacity: 0.7; }

.panel-action[title] {
  position: relative;
}

.panel-action[title]::after {
  content: attr(title);
  position: absolute;
  bottom: -28px;
  left: 50%;
  transform: translateX(-50%);
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font-size: 11px;
  font-weight: 400;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 150ms ease;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

.panel-action[title]:hover::after {
  opacity: 1;
}
.panel-action:hover svg { opacity: 1; }

/* ── Footer ── */

.panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  border-top: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.footer-comment-btn {
  margin-left: auto;
}

/* ── Selection hint (floating tooltip near selection) ── */

.selection-hint {
  position: absolute;
  z-index: 10;
  padding: 4px 10px;
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--panel);
  border: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 150ms ease;
}

.selection-hint.visible {
  opacity: 1;
}

/* ── Content areas ── */

.panel-content-wrapper {
  max-height: var(--content-height);
  overflow: auto;
  position: relative;
}

.panel-content {
  min-height: 0;
}

.source-content .code-viewer { height: 100%; overflow: auto; }
.html-content .html-rendered-frame { min-height: 300px; height: var(--content-height); }
.markdown-content { overflow: auto; padding: 0 4px 0 0; }

.markdown-content--workspace {
  padding: 0;
  overflow: visible;
}

.markdown-workspace {
  display: flex;
  background: transparent;
}

.markdown-workspace--edit {
  min-height: min(70vh, 880px);
}

.markdown-workspace--with-toc {
  align-items: stretch;
}

.markdown-workspace-main {
  flex: 1 1 auto;
  min-width: 0;
  padding-left: 18px;
}

.markdown-workspace-main--editor {
  display: flex;
  min-height: min(70vh, 880px);
}

.markdown-editor-shell {
  display: grid;
  gap: 14px;
  width: 100%;
  padding: 20px;
  position: relative;
}

.markdown-editor-mode-toggle {
  position: relative;
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: 4px;
  padding: 3px 4.5px 3px 3px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel-subtle) 72%, transparent);
  border: 1px solid color-mix(in srgb, var(--border) 45%, transparent);
}

.markdown-editor-mode-toggle-indicator {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: calc(50% - 3.5px);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 96%, transparent);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
  transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 220ms ease, background-color 220ms ease;
  pointer-events: none;
}

.markdown-editor-mode-toggle-indicator--markdown {
  transform: translateX(calc(100% + 2.5px));
}

.markdown-editor-mode-option {
  position: relative;
  z-index: 1;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  min-width: 0;
  height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: color 180ms ease, opacity 180ms ease, transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.markdown-editor-mode-option.is-active {
  color: var(--text);
  transform: translateY(-0.5px);
}

.markdown-editor-mode-option span {
  white-space: nowrap;
  transition: opacity 180ms ease;
}

.markdown-editor-mode-option:not(.is-active) {
  opacity: 0.82;
}

.markdown-editor-mode-option.is-active svg,
.markdown-editor-mode-option.is-active span {
  opacity: 1;
}

.markdown-editor-pane {
  display: flex;
  flex-direction: column;
  min-height: min(70vh, 840px);
  overflow: visible;
  background: transparent;
}

.markdown-editor-pane--raw {
  max-width: none;
}

.markdown-editor-pane--markdown {
  max-width: none;
}

.markdown-editor-context-menu {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 6px;
  background: #171717;
  border: 1px solid color-mix(in srgb, var(--border) 34%, transparent);
  border-radius: 10px;
  position: absolute;
  z-index: 20;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}

.markdown-editor-context-menu[hidden] {
  display: none;
}

.markdown-format-button {
  border: none;
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  border-radius: 6px;
  width: 32px;
  height: 32px;
  padding: 0;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.markdown-format-button:hover {
  background: rgba(255, 255, 255, 0.14);
}

.markdown-format-button--swatch {
  padding: 0;
}

.markdown-format-size {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  border-radius: 6px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
}

.markdown-format-size select {
  height: 32px;
  border: none;
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  padding: 0 8px;
  font: inherit;
  font-size: 12px;
  outline: none;
}

.markdown-format-sep {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.14);
}

.markdown-link-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  z-index: 30;
}

.markdown-link-modal[hidden] {
  display: none;
}

.markdown-link-modal-card {
  width: min(420px, calc(100% - 32px));
  background: var(--panel);
  border: 1px solid color-mix(in srgb, var(--border) 45%, transparent);
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.22);
}

.markdown-link-mode-tabs {
  display: inline-flex;
  gap: 6px;
  margin-bottom: 12px;
}

.markdown-link-mode-tab {
  border: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
  background: transparent;
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 7px 12px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.markdown-link-mode-tab.is-active {
  color: var(--text);
  background: color-mix(in srgb, var(--panel-subtle) 72%, var(--border) 28%);
}

.markdown-link-modal-label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.markdown-link-modal-input {
  width: 100%;
  border: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: color-mix(in srgb, var(--panel-subtle) 68%, transparent);
}

.markdown-link-modal-select {
  appearance: none;
}

.markdown-link-results {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 160px;
  overflow: auto;
  margin: 10px 0 12px;
}

.markdown-link-results-empty {
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text-secondary);
  border: 1px dashed color-mix(in srgb, var(--border) 45%, transparent);
  border-radius: 10px;
}

.markdown-link-result {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  width: 100%;
  border: 1px solid color-mix(in srgb, var(--border) 45%, transparent);
  background: transparent;
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  text-align: left;
}

.markdown-link-result.is-active {
  background: color-mix(in srgb, var(--panel-subtle) 72%, var(--border) 28%);
}

.markdown-link-result-title {
  font-size: 13px;
  color: var(--text);
}

.markdown-link-result-path {
  font-size: 11px;
  color: var(--text-secondary);
}

.markdown-link-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}

.markdown-link-modal-button {
  border: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
  background: transparent;
  color: var(--text-secondary);
  border-radius: 10px;
  padding: 8px 12px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.markdown-link-modal-button--primary {
  color: var(--text);
  background: color-mix(in srgb, var(--panel-subtle) 72%, var(--border) 28%);
}

.markdown-editor-copy-button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  border-radius: 8px;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  transition: color 150ms ease, background 150ms ease;
  line-height: 1.4;
  font-family: inherit;
}

.markdown-editor-copy-button span {
  white-space: nowrap;
}

.markdown-editor-copy-button:hover {
  color: var(--text);
}

.markdown-editor-copy-button[data-status="Copied!"] {
  color: var(--text);
}

.markdown-editor-copy-button[data-status="Copy failed"] {
  color: #b91c1c;
}

.panel-save-status {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
  background: none;
  white-space: nowrap;
  pointer-events: none;
  line-height: 1;
}

.panel-save-status--saving {
  color: var(--text);
}

.panel-save-status--saved {
  color: var(--muted);
  opacity: 0.7;
}

.panel-save-status--pending {
  color: var(--muted);
}

.panel-topbar .markdown-editor-mode-toggle {
  margin-left: 2px;
}

.markdown-toc-shell {
  flex: 0 0 var(--toc-rail-width);
  width: var(--toc-rail-width);
  border-right: 1px solid color-mix(in srgb, var(--border) 18%, transparent);
  background: color-mix(in srgb, var(--panel-subtle) 90%, transparent);
  padding: 18px 14px 18px 16px;
  display: flex;
  flex-direction: column;
  align-self: flex-start;
  position: sticky;
  top: 12px;
  max-height: calc(100vh - 120px);
  overflow: visible;
  transition: flex-basis 0.2s ease, width 0.2s ease, padding 0.2s ease;
}

.markdown-toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  min-height: 20px;
}

.markdown-toc-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.document-outline-toggle {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  width: 24px;
  height: 24px;
  padding: 0;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  opacity: 0.5;
  transition: opacity 0.15s, background 0.15s;
}
.document-outline-toggle:hover {
  opacity: 1;
  background: color-mix(in srgb, var(--border) 20%, transparent);
}

.markdown-toc-collapsed {
  flex: 0 0 44px !important;
  width: 44px !important;
  padding: 12px 6px !important;
  overflow: hidden;
  background: transparent !important;
  border-right: none !important;
}
.markdown-toc-collapsed .markdown-toc-header {
  justify-content: center;
}
.markdown-toc-collapsed .markdown-toc-title,
.markdown-toc-collapsed .markdown-toc-nav {
  display: none;
}
.markdown-toc-collapsed .document-outline-toggle {
  width: 30px;
  height: 30px;
  border: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
  border-radius: 8px;
  opacity: 0.7;
}

.markdown-toc-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: auto;
  min-height: 0;
}

.markdown-toc-link {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  text-align: left;
  font: inherit;
  font-size: 13px;
  line-height: 1.35;
  padding: 6px 8px;
  border-radius: 8px;
  cursor: pointer;
}

.markdown-toc-link[data-level="2"] { padding-left: 16px; }
.markdown-toc-link[data-level="3"] { padding-left: 24px; }
.markdown-toc-link[data-level="4"] { padding-left: 32px; }
.markdown-toc-link[data-level="5"] { padding-left: 40px; }
.markdown-toc-link[data-level="6"] { padding-left: 48px; }

.markdown-toc-link:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
}

.markdown-toc-link.is-active {
  color: var(--text);
  background: color-mix(in srgb, var(--panel) 82%, var(--border) 18%);
}

.markdown-link-popover {
  position: absolute;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}
.markdown-link-popover[hidden] { display: none; }
.markdown-link-popover-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.markdown-link-popover-btn:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--border) 30%, transparent);
}

.markdown-editor-root {
  flex: 1 1 auto;
  min-height: 0;
  padding: 0;
  position: relative;
}

.markdown-editor-surface {
  flex: 1 1 auto;
  min-height: min(70vh, 760px);
  outline: none;
}

.markdown-editor-surface--markdown {
  max-width: none;
  margin: 0;
  padding: 22px 24px 28px;
}

.markdown-editor-textarea {
  width: 100%;
  min-height: min(70vh, 760px);
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 14px;
  line-height: 1.65;
  padding: 18px 20px 24px;
  resize: none;
  overflow: hidden;
  outline: none;
}

.markdown-editor-textarea:focus {
  box-shadow: none;
}

.image-content {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, color-mix(in oklab, var(--panel) 86%, var(--panel-muted) 14%), var(--panel));
  padding: 16px;
}

.image-preview {
  width: 100%;
  max-width: 920px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-preview img {
  max-width: 100%;
  max-height: var(--content-height);
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
}

.notice {
  background: var(--notice-bg);
  color: var(--notice-text);
  padding: 10px 16px;
  font-size: 13px;
}

/* ── Load-more banners ── */

.load-lines-banner {
  display: block;
  width: 100%;
  padding: 8px 16px;
  font-size: 12px;
  font-family: inherit;
  color: var(--text-secondary);
  background: color-mix(in srgb, var(--panel-muted) 40%, transparent);
  border: none;
  cursor: pointer;
  text-align: center;
  transition: color 150ms ease, background 150ms ease;
}

#load-before {
  border-bottom: 1px solid color-mix(in srgb, var(--border) 30%, transparent);
}

#load-after {
  border-top: 1px solid color-mix(in srgb, var(--border) 30%, transparent);
}

.load-lines-banner:hover {
  color: var(--text-secondary);
  background: var(--panel-muted);
}

.load-lines-banner:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Code viewer ── */

.code-viewer {
  background: transparent;
  color: var(--code-text);
  overflow-x: auto;
  padding: 12px 0;
  margin: 0;
  font-family: var(--font-mono, ui-monospace, monospace);
  line-height: 1.5;
  font-size: 13px;
  white-space: pre;
  border: 0;
  border-radius: 0;
}

.code-table {
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
}

.code-line {
  transition: background 80ms ease;
}

.code-line:hover {
  background: color-mix(in srgb, var(--panel-muted) 50%, transparent);
}

.code-line.selected {
  background: color-mix(in srgb, var(--border) 40%, transparent);
}

.code-line.selected:hover {
  background: color-mix(in srgb, var(--border) 55%, transparent);
}

.line-num {
  padding: 0 12px 0 18px;
  text-align: right;
  color: var(--muted);
  opacity: 0.5;
  user-select: none;
  cursor: pointer;
  vertical-align: top;
  white-space: nowrap;
  font-size: 12px;
  min-width: 2.5em;
  transition: opacity 120ms ease;
}

.line-num:hover {
  opacity: 1;
  color: var(--text-secondary);
}

.code-line.selected .line-num {
  opacity: 0.8;
}

.line-content {
  padding: 0 18px 0 8px;
  white-space: pre;
  width: 100%;
}

.code-viewer .hljs {
  display: block;
  background: transparent;
  color: inherit;
}

/* ── Syntax tokens ── */

.hljs-comment, .hljs-quote { color: var(--hljs-comment); }
.hljs-keyword, .hljs-selector-tag, .hljs-name, .hljs-section,
.hljs-selector-id, .hljs-selector-class, .hljs-doctag, .hljs-regexp { color: var(--hljs-keyword); }
.hljs-string, .hljs-template-tag, .hljs-template-variable, .hljs-variable { color: var(--hljs-string); }
.hljs-type, .hljs-params, .hljs-variable.language_ { color: var(--hljs-type); }

.hljs-number, .hljs-literal, .hljs-symbol, .hljs-bullet { color: var(--hljs-number); }
.hljs-attr, .hljs-attribute, .hljs-property { color: var(--hljs-attr); }
.hljs-built_in, .hljs-built-in { color: var(--hljs-built-in); }
.hljs-tag, .hljs-selector-pseudo, .hljs-selector-attr { color: var(--hljs-tag); }
.hljs-title, .hljs-title.class_, .hljs-title.function_,
.hljs-meta, .hljs-meta .hljs-keyword, .hljs-subst,
.hljs-punctuation, .hljs-operator { color: inherit; }

/* ── Markdown (typographic, airy, Medium-inspired) ── */

.markdown h1, .markdown h2, .markdown h3 { letter-spacing: -.015em; }
.markdown p { margin: 1em 0; }
.markdown ul, .markdown ol { margin: .8em 0; padding-left: 1.4rem; }

.markdown-doc {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 28px 36px;
  line-height: 1.8;
  color: var(--markdown-text);
  font-size: 16px;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.markdown-doc h1 {
  margin: 0 0 24px;
  font-size: 28px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--markdown-text);
}

.markdown-doc h2 {
  margin: 36px 0 16px;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--markdown-text);
}

.markdown-doc h3 {
  margin: 28px 0 12px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--markdown-text);
}

.markdown-doc p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--markdown-muted);
  margin: 0 0 1.2em;
}

.markdown-doc li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--markdown-muted);
  margin-bottom: 0.3em;
}

.markdown-doc ul, .markdown-doc ol {
  margin: 8px 0 20px;
  padding-left: 1.3em;
}

.markdown-doc blockquote {
  margin: 20px 0;
  padding: 2px 0 2px 20px;
  border-left: 3px solid color-mix(in srgb, var(--border) 70%, transparent);
  color: var(--markdown-muted);
  font-style: italic;
}

.markdown-doc hr {
  border: none;
  border-top: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
  margin: 32px 0;
}

.markdown-doc img {
  max-width: 100%;
  border-radius: 8px;
  margin: 16px 0;
}

.markdown-doc code:not(.hljs) {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: .9em;
  background: var(--inline-code-bg);
  color: var(--inline-code-text);
  border: 1px solid var(--inline-code-border);
  border-radius: 6px;
  padding: 2px 6px;
}

.markdown-doc .code-viewer {
  margin: 14px 0;
  border: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
  border-radius: 10px;
}

.markdown-doc a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--text-secondary) 45%, transparent);
  text-underline-offset: 0.18em;
}

.markdown-doc a:hover {
  text-decoration-color: currentcolor;
}

/* ── HTML frame ── */

.html-rendered-frame {
  width: 100%;
  border: 0;
  border-radius: 0;
  background: var(--panel);
  display: block;
  overflow: hidden;
}

/* ── Responsive ── */

@media (max-width: 720px) {
  .markdown-workspace {
    flex-direction: column;
  }
  .markdown-workspace--edit {
    min-height: auto;
  }
  .markdown-workspace--with-toc {
    background: transparent;
  }
  .markdown-editor-shell {
    padding: 12px;
  }
  .markdown-toc-shell {
    position: static;
    top: auto;
    max-height: none;
    overflow: visible;
    align-self: stretch;
    width: 100% !important;
    flex-basis: auto !important;
    border-right: none;
    border-bottom: 1px solid color-mix(in srgb, var(--border) 45%, transparent);
  }
  .markdown-toc-collapsed .markdown-toc-title,
  .markdown-toc-collapsed .markdown-toc-nav {
    display: flex;
  }
  .document-outline-toggle {
    display: none;
  }
  .markdown-workspace-main {
    padding-left: 0;
  }
  .markdown-toc-nav {
    max-height: 40vh;
  }
  .markdown-editor-root {
    padding: 0;
  }
  .markdown-editor-textarea {
    min-height: 58vh;
    padding: 14px;
  }
  .markdown-editor-surface--markdown {
    padding: 16px;
  }
  .markdown-doc { padding: 16px; }
  .markdown-doc h1 { font-size: 27px; }
  .markdown-doc h2 { font-size: 22px; }
  .markdown-doc h3 { font-size: 18px; }
  .markdown-doc p, .markdown-doc li { font-size: 15px; }
}

/* ── Directory tree ── */

.directory-content {
  padding: 12px 16px;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 13px;
  line-height: 1.6;
}

.dir-tree {
  display: flex;
  flex-direction: column;
}

.dir-entry, .dir-entry-group {
  display: flex;
  flex-direction: column;
}

.dir-row {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
}

.dir-row:hover {
  background: color-mix(in srgb, var(--text) 8%, transparent);
}

.dir-row-file:active {
  background: color-mix(in srgb, var(--text) 14%, transparent);
}

.dir-row.dir-loading {
  opacity: 0.5;
  pointer-events: none;
}

.dir-children {
  padding-left: 20px;
  border-left: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
  margin-left: 11px;
}

.dir-children.dir-collapsed {
  display: none;
}

.dir-chevron {
  display: inline-block;
  width: 14px;
  text-align: center;
  font-size: 10px;
  color: var(--secondary);
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.dir-icon, .file-icon {
  font-size: 14px;
  flex-shrink: 0;
}

.dir-name {
  font-weight: 600;
  color: var(--text);
}

.dir-name-denied {
  color: var(--secondary);
  text-decoration: line-through;
}

.file-name {
  color: var(--secondary);
}

.dir-row-file:hover .file-name {
  color: var(--text);
}

.dir-empty {
  color: var(--secondary);
  font-style: italic;
  padding: 4px 6px;
}

.dir-row-warning {
  cursor: default;
  opacity: 0.7;
  font-style: italic;
  font-size: 12px;
}

.dir-row-warning:hover {
  background: none;
}

.dir-load-more {
  cursor: pointer;
}

.dir-load-more:hover {
  background: color-mix(in srgb, var(--text) 8%, transparent) !important;
  opacity: 1;
}

.dir-load-more:hover .dir-warning-text {
  text-decoration: underline;
}

.dir-warning-text {
  color: var(--secondary);
}

.dir-back-btn {
  flex-shrink: 0;
  margin-right: 4px;
  font-weight: 600;
}

.dir-open-btn {
  margin-left: 6px;
  padding: 0 4px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 13px;
  opacity: 0;
  flex-shrink: 0;
  border-radius: 3px;
  pointer-events: none;
  transition: opacity 0.1s ease;
}

.dir-open-btn:hover {
  background: color-mix(in srgb, var(--text) 10%, transparent);
}

.dir-row-folder:hover .dir-open-btn {
  opacity: 0.6;
  pointer-events: auto;
}

.dir-row-folder:hover .dir-open-btn:hover {
  opacity: 1;
}

/* === File-changed-on-disk conflict modal === */

.md-conflict-modal[hidden] {
  display: none;
}

.md-conflict-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.42);
  display: grid;
  place-items: center;
  z-index: 50;
  padding: 16px;
  box-sizing: border-box;
}

.md-conflict-card {
  width: min(480px, 100%);
  max-height: min(80vh, 560px);
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.md-conflict-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 10px;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
}

.md-conflict-header h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.md-conflict-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease;
}

.md-conflict-close:hover {
  background: var(--panel-subtle);
  color: var(--text);
}

.md-conflict-close svg {
  width: 16px;
  height: 16px;
}

.md-conflict-body {
  padding: 14px 16px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
}

.md-conflict-body p {
  margin: 0 0 10px;
}

.md-conflict-body p:last-of-type {
  margin-bottom: 8px;
}

.md-conflict-body ul {
  margin: 0 0 4px;
  padding-left: 20px;
  color: var(--text-secondary);
}

.md-conflict-body li {
  margin-bottom: 4px;
}

.md-conflict-filename {
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, Consolas, monospace);
  font-weight: 600;
  word-break: break-all;
}

.md-conflict-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 16px 14px;
  border-top: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
  background: color-mix(in srgb, var(--panel-subtle) 50%, transparent);
}

.md-conflict-btn {
  appearance: none;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.md-conflict-btn:hover {
  background: var(--panel-subtle);
}

.md-conflict-btn:focus-visible {
  outline: 2px solid var(--accent, #4a8cff);
  outline-offset: 2px;
}

.md-conflict-btn--secondary {
  color: var(--text-secondary);
}

.md-conflict-btn--secondary:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--border) 80%, var(--text) 20%);
}

.md-conflict-btn--primary {
  background: var(--accent, #4a8cff);
  color: #fff;
  border-color: color-mix(in srgb, var(--accent, #4a8cff) 85%, black 15%);
}

.md-conflict-btn--primary:hover {
  background: color-mix(in srgb, var(--accent, #4a8cff) 88%, black 12%);
}