styles.css

:root {
  color-scheme: light;
  --bg: #f5f7f6;
  --surface: #ffffff;
  --surface-muted: #f8faf9;
  --surface-strong: #eef2f0;
  --canvas: #f9fbfa;
  --text: #1d2723;
  --text-soft: #5f6f68;
  --text-faint: #8b9892;
  --line: #dde5e1;
  --line-strong: #cbd6d1;
  --accent: #287568;
  --accent-strong: #1e5e54;
  --accent-soft: #e4f2ee;
  --blue: #4f7bd9;
  --blue-soft: #eaf0fc;
  --coral: #e46f61;
  --coral-soft: #fbecea;
  --amber: #d9942e;
  --amber-soft: #fbf1df;
  --violet: #8067b7;
  --violet-soft: #f0ecf8;
  --shadow-sm: 0 1px 2px rgba(28, 45, 38, 0.06), 0 3px 10px rgba(28, 45, 38, 0.04);
  --shadow-md: 0 14px 34px rgba(26, 43, 36, 0.12), 0 2px 8px rgba(26, 43, 36, 0.06);
  --topbar-height: 66px;
  --commandbar-height: 72px;
  --statusbar-height: 30px;
  --left-panel-width: 252px;
  --right-panel-width: 286px;
  --radius: 8px;
  --font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

body[data-theme="dark"] {
  color-scheme: dark;
  --bg: #191f1d;
  --surface: #222a27;
  --surface-muted: #252e2a;
  --surface-strong: #303a36;
  --canvas: #1c2421;
  --text: #eef5f2;
  --text-soft: #b0beb8;
  --text-faint: #7f9189;
  --line: #34403b;
  --line-strong: #46534d;
  --accent: #65b7a4;
  --accent-strong: #8bcbbb;
  --accent-soft: #28443c;
  --blue: #84a7ed;
  --blue-soft: #293a5a;
  --coral: #ef9186;
  --coral-soft: #52332f;
  --amber: #e8b65e;
  --amber-soft: #4d3d25;
  --violet: #ae9bd5;
  --violet-soft: #3d3552;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 18px 42px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

button,
input,
textarea,
select {
  font: inherit;
  letter-spacing: 0;
}

button {
  color: inherit;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 74%, white);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

svg {
  display: block;
}

.app-shell {
  display: grid;
  grid-template-rows: var(--topbar-height) var(--commandbar-height) minmax(0, 1fr) var(--statusbar-height);
  width: 100%;
  height: 100%;
  min-width: 320px;
}

.topbar {
  position: relative;
  z-index: 40;
  display: grid;
  grid-template-columns: minmax(190px, auto) minmax(200px, 1fr) auto;
  align-items: center;
  gap: 18px;
  height: var(--topbar-height);
  padding: 0 18px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.brand-block {
  display: flex;
  align-items: center;
  min-width: 184px;
  gap: 11px;
}

.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 8px;
  background: var(--text);
  overflow: hidden;
}

.brand-mark span {
  position: absolute;
  left: 8px;
  height: 3px;
  border-radius: 3px;
  background: #fff;
  transform-origin: left center;
}

.brand-mark span:nth-child(1) {
  top: 9px;
  width: 18px;
  transform: rotate(14deg);
}

.brand-mark span:nth-child(2) {
  top: 16px;
  width: 14px;
  transform: rotate(-14deg);
}

.brand-mark span:nth-child(3) {
  top: 23px;
  width: 19px;
  transform: rotate(10deg);
}

body[data-theme="dark"] .brand-mark {
  background: #edf5f1;
}

body[data-theme="dark"] .brand-mark span {
  background: #1f2824;
}

.brand-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  line-height: 1.1;
}

.brand-copy strong {
  font-size: 16px;
  font-weight: 760;
}

.brand-copy span {
  margin-top: 4px;
  color: var(--text-faint);
  font-size: 11px;
}

.document-heading {
  min-width: 0;
  justify-self: start;
}

.document-title-line {
  display: flex;
  align-items: center;
  max-width: 430px;
  min-width: 0;
  gap: 2px;
}

.document-title {
  width: min(340px, 31vw);
  min-width: 140px;
  padding: 4px 2px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: var(--text);
  font-size: 15px;
  font-weight: 660;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.document-title:hover {
  border-color: var(--line);
}

.document-title:focus {
  border-color: var(--accent);
  background: var(--surface-muted);
}

.save-state {
  display: flex;
  align-items: center;
  margin-top: 2px;
  color: var(--text-faint);
  font-size: 11px;
  gap: 5px;
}

.save-dot,
.status-indicator,
.breadcrumb-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border-radius: 50%;
  background: #5aae91;
}

.save-state.saving .save-dot {
  background: var(--amber);
}

.topbar-actions,
.topbar-group {
  display: flex;
  align-items: center;
}

.topbar-actions {
  justify-content: flex-end;
  gap: 6px;
}

.topbar-group {
  gap: 2px;
}

.topbar-divider {
  width: 1px;
  height: 22px;
  margin: 0 4px;
  background: var(--line);
}

.icon-button,
.ghost-button,
.outline-button,
.primary-button,
.avatar-button,
.tool-button,
.menu-button,
.panel-tab,
.status-link,
.zoom-value,
.segmented-button,
.shape-button,
.color-swatch,
.theme-tile,
.template-card,
.outline-row,
.file-row,
.suggestion-chip {
  border: 0;
  background: transparent;
  cursor: pointer;
}

.icon-button {
  display: inline-grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  padding: 0;
  border-radius: 6px;
}

.icon-button svg,
.ghost-button svg,
.outline-button svg,
.primary-button svg,
.tool-button svg,
.menu-button svg,
.panel-tab svg,
.statusbar svg,
.inspector svg,
.modal svg,
.dropdown-menu svg,
.drawer svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-button svg {
  width: 17px;
  height: 17px;
}

.icon-button.subtle {
  color: var(--text-soft);
}

.icon-button.subtle:hover,
.icon-button.light:hover {
  background: var(--surface-strong);
  color: var(--text);
}

.icon-button.light {
  background: var(--surface);
  color: var(--text-soft);
  box-shadow: var(--shadow-sm);
}

.icon-button.tiny {
  width: 26px;
  height: 26px;
  flex-basis: 26px;
}

.icon-button.tiny svg {
  width: 15px;
  height: 15px;
}

.ghost-button,
.outline-button,
.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 610;
  gap: 7px;
  white-space: nowrap;
}

.ghost-button {
  color: var(--text-soft);
}

.ghost-button:hover {
  background: var(--surface-strong);
  color: var(--text);
}

.outline-button {
  border: 1px solid var(--line-strong);
  background: var(--surface);
}

.outline-button:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.primary-button {
  background: var(--text);
  color: var(--surface);
}

.primary-button:hover {
  background: var(--accent-strong);
}

.primary-button.danger-primary {
  background: var(--coral);
  color: #fff;
}

.primary-button.danger-primary:hover {
  background: color-mix(in srgb, var(--coral) 84%, #7f1d1d);
}

.avatar-button {
  width: 34px;
  height: 34px;
  margin-left: 2px;
  border-radius: 50%;
  background: var(--coral-soft);
  color: var(--coral);
  font-size: 13px;
  font-weight: 750;
}

.mobile-menu-button {
  display: none;
}

.commandbar {
  position: relative;
  z-index: 35;
  display: flex;
  align-items: stretch;
  min-width: 0;
  padding: 0 12px;
  overflow: hidden;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.menu-nav,
.command-group {
  display: flex;
  align-items: stretch;
  flex: 0 0 auto;
}

.menu-nav {
  align-items: center;
  gap: 1px;
}

.menu-button {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 8px;
  border-radius: 5px;
  color: var(--text-soft);
  font-size: 13px;
  gap: 2px;
}

.menu-button svg {
  width: 13px;
  height: 13px;
}

.menu-button:hover,
.menu-button.open {
  background: var(--surface-strong);
  color: var(--text);
}

.command-divider {
  width: 1px;
  height: 42px;
  align-self: center;
  flex: 0 0 1px;
  margin: 0 8px;
  background: var(--line);
}

.command-spacer {
  flex: 1 1 auto;
  min-width: 8px;
}

.tool-button {
  position: relative;
  display: flex;
  min-width: 54px;
  height: 100%;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 6px 7px 7px;
  color: var(--text-faint);
  gap: 4px;
}

.tool-button::after {
  position: absolute;
  right: 7px;
  bottom: 5px;
  left: 7px;
  height: 2px;
  border-radius: 2px;
  background: transparent;
  content: "";
}

.tool-button svg {
  width: 20px;
  height: 20px;
}

.tool-button span {
  font-size: 11px;
  line-height: 1;
  white-space: nowrap;
}

.tool-button:hover {
  background: var(--surface-muted);
  color: var(--text);
}

.tool-button.active {
  color: var(--accent);
}

.tool-button.active::after {
  background: var(--accent);
}

.tool-button.action-add {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.tool-button.action-add::after {
  background: var(--accent);
}

.tool-button.action-delete {
  color: var(--coral);
}

.tool-button.action-delete:hover {
  background: var(--coral-soft);
  color: var(--coral);
}

.tool-button.action-clear {
  color: var(--coral);
}

.tool-button.action-clear:hover {
  background: var(--coral-soft);
}

.primary-tools .tool-button:nth-child(2) svg {
  color: var(--blue);
}

.primary-tools .tool-button:nth-child(3) svg {
  color: var(--violet);
}

.primary-tools .tool-button:nth-child(4) svg {
  color: var(--coral);
}

.primary-tools .tool-button:nth-child(5) svg {
  color: var(--amber);
}

.secondary-tools .tool-button:nth-child(1) svg {
  color: var(--amber);
}

.secondary-tools .tool-button:nth-child(2) svg {
  color: var(--coral);
}

.secondary-tools .tool-button:nth-child(3) svg {
  color: var(--accent);
}

.secondary-tools .tool-button:nth-child(4) svg {
  color: var(--blue);
}

.secondary-tools .tool-button:nth-child(5) svg {
  color: var(--violet);
}

.workspace {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-columns: var(--left-panel-width) minmax(0, 1fr) var(--right-panel-width);
  overflow: hidden;
}

.workspace.left-collapsed {
  grid-template-columns: 0 minmax(0, 1fr) var(--right-panel-width);
}

.workspace.right-collapsed {
  grid-template-columns: var(--left-panel-width) minmax(0, 1fr) 0;
}

.workspace.left-collapsed.right-collapsed {
  grid-template-columns: 0 minmax(0, 1fr) 0;
}

.left-panel,
.right-panel {
  position: relative;
  z-index: 20;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--surface);
  transition: transform 180ms ease, opacity 160ms ease;
}

.left-panel {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  border-right: 1px solid var(--line);
}

.right-panel {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
}

.left-collapsed .left-panel {
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
}

.right-collapsed .right-panel {
  transform: translateX(100%);
  opacity: 0;
  pointer-events: none;
}

.panel-tabs {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding-top: 10px;
  background: var(--surface-muted);
  border-right: 1px solid var(--line);
}

.panel-tab {
  position: relative;
  display: flex;
  height: 62px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: var(--text-faint);
  gap: 5px;
}

.panel-tab::before {
  position: absolute;
  top: 13px;
  bottom: 13px;
  left: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: transparent;
  content: "";
}

.panel-tab svg {
  width: 19px;
  height: 19px;
}

.panel-tab span {
  font-size: 10px;
}

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

.panel-tab.active {
  background: var(--surface);
  color: var(--accent);
}

.panel-tab.active::before {
  background: var(--accent);
}

.panel-content {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  scrollbar-color: var(--line-strong) transparent;
  scrollbar-width: thin;
}

.sidebar-section {
  padding: 16px 14px;
}

.sidebar-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.sidebar-heading h2,
.inspector-header h2 {
  margin: 2px 0 0;
  color: var(--text);
  font-size: 14px;
  line-height: 1.25;
}

.eyebrow {
  color: var(--text-faint);
  font-size: 10px;
  font-weight: 710;
  text-transform: uppercase;
}

.search-field {
  position: relative;
  margin-top: 13px;
}

.search-field svg {
  position: absolute;
  top: 50%;
  left: 9px;
  width: 15px;
  height: 15px;
  color: var(--text-faint);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  transform: translateY(-50%);
}

.search-field input {
  width: 100%;
  height: 32px;
  padding: 0 10px 0 31px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-muted);
  color: var(--text);
  font-size: 12px;
}

.search-field input::placeholder {
  color: var(--text-faint);
}

.outline-tree {
  margin-top: 13px;
}

.outline-row {
  display: grid;
  width: 100%;
  min-height: 34px;
  grid-template-columns: 16px minmax(0, 1fr) auto;
  align-items: center;
  padding: 4px 5px 4px var(--outline-indent, 4px);
  border-radius: 5px;
  color: var(--text-soft);
  text-align: left;
  gap: 5px;
}

.outline-row:hover {
  background: var(--surface-muted);
  color: var(--text);
}

.outline-row.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.outline-row .outline-toggle {
  display: grid;
  width: 16px;
  height: 16px;
  place-items: center;
  color: var(--text-faint);
}

.outline-row .outline-toggle svg {
  width: 12px;
  height: 12px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  transition: transform 160ms ease;
}

.outline-row.collapsed .outline-toggle svg {
  transform: rotate(-90deg);
}

.outline-row .outline-toggle.empty {
  visibility: hidden;
}

.outline-label {
  min-width: 0;
  overflow: hidden;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.outline-meta {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--node-color, var(--accent));
}

.sidebar-footer-action {
  display: flex;
  width: 100%;
  height: 34px;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  font-size: 12px;
  gap: 6px;
}

.sidebar-footer-action:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.sidebar-action-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 74px;
  gap: 7px;
}

.sidebar-footer-action.danger {
  border-color: color-mix(in srgb, var(--coral) 45%, var(--line));
  color: var(--coral);
}

.sidebar-footer-action.danger:hover {
  border-color: var(--coral);
  background: var(--coral-soft);
  color: var(--coral);
}

.sidebar-footer-action svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

.template-list {
  display: grid;
  margin-top: 13px;
  gap: 9px;
}

.mini-template {
  display: grid;
  min-height: 76px;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  text-align: left;
  gap: 10px;
}

.mini-template:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.mini-template strong {
  display: block;
  font-size: 12px;
}

.mini-template span {
  display: block;
  margin-top: 4px;
  color: var(--text-faint);
  font-size: 10px;
}

.template-preview-mini {
  position: relative;
  width: 72px;
  height: 54px;
  overflow: hidden;
  background: var(--surface-muted);
  border-radius: 5px;
}

.preview-root,
.preview-node,
.preview-line {
  position: absolute;
}

.preview-root,
.preview-node {
  height: 5px;
  border-radius: 3px;
}

.preview-root {
  top: 24px;
  left: 28px;
  width: 17px;
  background: var(--accent);
}

.preview-node {
  width: 12px;
  background: var(--text-faint);
}

.preview-node.n1 { top: 9px; left: 54px; background: var(--blue); }
.preview-node.n2 { top: 22px; left: 56px; background: var(--coral); }
.preview-node.n3 { top: 38px; left: 52px; background: var(--amber); }
.preview-node.n4 { top: 14px; left: 7px; background: var(--violet); }
.preview-node.n5 { top: 35px; left: 9px; background: var(--accent); }

.preview-line {
  height: 1px;
  background: var(--line-strong);
  transform-origin: left center;
}

.preview-line.l1 { top: 27px; left: 43px; width: 19px; transform: rotate(-42deg); }
.preview-line.l2 { top: 27px; left: 43px; width: 17px; transform: rotate(-5deg); }
.preview-line.l3 { top: 28px; left: 43px; width: 20px; transform: rotate(35deg); }
.preview-line.l4 { top: 25px; left: 28px; width: 18px; transform: rotate(154deg); }
.preview-line.l5 { top: 29px; left: 28px; width: 18px; transform: rotate(26deg); }

.file-list {
  margin-top: 14px;
}

.file-row {
  display: grid;
  width: 100%;
  min-height: 44px;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  padding: 5px 4px;
  color: var(--text-soft);
  text-align: left;
  gap: 7px;
}

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

.file-icon {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
}

.file-icon svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.file-info {
  min-width: 0;
}

.file-info strong,
.file-info span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-info strong {
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
}

.file-info span {
  margin-top: 3px;
  color: var(--text-faint);
  font-size: 10px;
}

.file-more {
  color: var(--text-faint);
}

.canvas-area {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--canvas);
}

.canvas-viewport {
  position: absolute;
  inset: 0;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  background-color: var(--canvas);
  background-image: radial-gradient(circle, color-mix(in srgb, var(--line-strong) 70%, transparent) 1px, transparent 1.2px);
  background-position: 0 0;
  background-size: 22px 22px;
}

.canvas-viewport.grid-hidden {
  background-image: none;
}

.canvas-viewport.panning,
.canvas-viewport.dragging-node {
  cursor: grabbing;
}

.canvas-stage {
  position: absolute;
  top: 0;
  left: 0;
  width: 3600px;
  height: 2600px;
  transform-origin: 0 0;
  will-change: transform;
}

.connections-layer,
.nodes-layer,
.relationship-layer {
  position: absolute;
  inset: 0;
  width: 3600px;
  height: 2600px;
  overflow: visible;
}

.connections-layer {
  pointer-events: none;
}

.relationship-layer {
  pointer-events: none;
}

.connection-path {
  fill: none;
  stroke: var(--connection-color, var(--line-strong));
  stroke-width: var(--connection-width, 2px);
  stroke-linecap: round;
  opacity: 0.94;
}

.connection-path.trunk {
  stroke-width: 2.4px;
}

.nodes-layer {
  pointer-events: none;
}

.mind-node {
  position: absolute;
  display: flex;
  width: var(--node-width, 154px);
  min-height: var(--node-height, 46px);
  align-items: center;
  justify-content: center;
  padding: 9px 13px;
  border: 1px solid var(--node-border, var(--line-strong));
  border-radius: var(--node-radius, 8px);
  background: var(--node-bg, var(--surface));
  color: var(--node-text, var(--text));
  box-shadow: 0 2px 7px rgba(33, 52, 44, 0.07);
  cursor: default;
  pointer-events: auto;
  user-select: none;
  transition: box-shadow 120ms ease, border-color 120ms ease, background 120ms ease;
}

.mind-node::before {
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: -1px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--node-color, var(--accent));
  content: "";
}

.mind-node.root {
  min-height: 64px;
  padding: 13px 18px;
  border-color: var(--root-color, #245f55);
  background: var(--root-color, #245f55);
  color: #fff;
  box-shadow: 0 10px 24px rgba(32, 87, 76, 0.2);
}

.mind-node.root::before {
  display: none;
}

.mind-node.branch {
  min-height: 50px;
  border-color: color-mix(in srgb, var(--node-color) 43%, var(--line));
  background: var(--node-bg, var(--surface));
  font-weight: 640;
}

.mind-node.leaf {
  min-height: 40px;
  box-shadow: 0 1px 4px rgba(33, 52, 44, 0.06);
  font-size: 13px;
}

.mind-node.shape-pill {
  border-radius: 999px;
}

.mind-node.shape-line {
  border-color: transparent;
  border-bottom: 2px solid var(--node-color, var(--accent));
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.mind-node.shape-line::before {
  display: none;
}

.mind-node.shape-diamond {
  border-radius: 4px;
  transform: rotate(1deg);
}

.mind-node:hover {
  border-color: var(--node-color, var(--accent));
  box-shadow: 0 6px 16px rgba(31, 54, 44, 0.12);
}

.mind-node.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent), 0 8px 22px rgba(31, 54, 44, 0.14);
}

.mind-node.selected.root {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 28%, transparent), 0 12px 28px rgba(31, 54, 44, 0.2);
}

.mind-node.dragging {
  z-index: 50;
  cursor: grabbing;
  transition: none;
}

.node-content {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.node-icon {
  display: inline-grid;
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  place-items: center;
  border-radius: 5px;
  background: color-mix(in srgb, var(--node-color) 15%, transparent);
  color: var(--node-color, var(--accent));
  font-size: 12px;
}

.root .node-icon {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.node-text {
  min-width: 0;
  overflow-wrap: anywhere;
  text-align: center;
  line-height: 1.38;
}

.root .node-text {
  font-size: 16px;
  font-weight: 720;
}

.node-text.bold {
  font-weight: 730;
}

.node-text.italic {
  font-style: italic;
}

.node-badges {
  position: absolute;
  top: -9px;
  right: 7px;
  display: flex;
  gap: 3px;
}

.node-badge {
  display: grid;
  min-width: 18px;
  height: 18px;
  place-items: center;
  padding: 0 4px;
  border: 2px solid var(--canvas);
  border-radius: 9px;
  background: var(--surface);
  color: var(--text-soft);
  box-shadow: var(--shadow-sm);
  font-size: 10px;
}

.collapse-control {
  position: absolute;
  top: 50%;
  display: grid;
  width: 18px;
  height: 18px;
  place-items: center;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--node-color) 38%, var(--line));
  border-radius: 50%;
  background: var(--surface);
  color: var(--node-color, var(--accent));
  cursor: pointer;
  opacity: 0;
  transform: translateY(-50%);
  transition: opacity 120ms ease;
}

.mind-node:hover .collapse-control,
.mind-node.selected .collapse-control,
.collapse-control.has-hidden {
  opacity: 1;
}

.collapse-control.side-right {
  right: -25px;
}

.collapse-control.side-left {
  left: -25px;
}

.collapse-control svg {
  width: 11px;
  height: 11px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
}

.node-editor {
  width: 100%;
  min-width: 70px;
  padding: 3px 5px;
  border: 0;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.88);
  color: #1d2723;
  text-align: center;
}

.relationship-line {
  position: absolute;
  pointer-events: none;
}

.canvas-toolbar-float {
  position: absolute;
  z-index: 12;
  top: 14px;
  right: 16px;
  left: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}

.node-action-bar {
  position: absolute;
  z-index: 18;
  display: flex;
  min-height: 38px;
  align-items: center;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
  gap: 2px;
  transform: translate(-50%, calc(-100% - 12px));
  transition: opacity 120ms ease;
}

.node-action-bar[hidden] {
  display: none;
}

.node-action-bar.below {
  transform: translate(-50%, 12px);
}

.node-action-button {
  display: inline-flex;
  height: 30px;
  align-items: center;
  padding: 0 8px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  font-size: 10px;
  gap: 5px;
  white-space: nowrap;
}

.node-action-button svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.node-action-button:hover {
  background: var(--surface-strong);
  color: var(--text);
}

.node-action-button.add {
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 650;
}

.node-action-button.delete {
  color: var(--coral);
}

.node-action-button.delete:hover {
  background: var(--coral-soft);
}

.node-action-button:disabled {
  background: transparent;
  color: var(--text-faint);
}

.node-action-divider {
  width: 1px;
  height: 20px;
  margin: 0 2px;
  background: var(--line);
}

.breadcrumb,
.canvas-quick-actions {
  display: flex;
  align-items: center;
}

.breadcrumb {
  min-width: 0;
  max-width: 50%;
  height: 30px;
  padding: 0 10px;
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: 6px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  color: var(--text-soft);
  box-shadow: var(--shadow-sm);
  font-size: 11px;
  gap: 7px;
  pointer-events: auto;
}

.breadcrumb span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.canvas-quick-actions {
  gap: 5px;
  pointer-events: auto;
}

.canvas-hint {
  position: absolute;
  z-index: 11;
  bottom: 18px;
  left: 18px;
  display: flex;
  align-items: center;
  min-height: 30px;
  padding: 4px 9px;
  border: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  border-radius: 6px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  color: var(--text-faint);
  box-shadow: var(--shadow-sm);
  font-size: 10px;
  gap: 5px;
  pointer-events: none;
}

.hint-key {
  display: inline-grid;
  min-width: 25px;
  height: 19px;
  place-items: center;
  padding: 0 5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--surface);
  color: var(--text-soft);
  font-size: 9px;
}

.hint-separator {
  width: 1px;
  height: 14px;
  margin: 0 2px;
  background: var(--line);
}

.zoom-control {
  position: absolute;
  z-index: 12;
  right: 18px;
  bottom: 18px;
  display: flex;
  height: 34px;
  align-items: center;
  border: 1px solid color-mix(in srgb, var(--line) 84%, transparent);
  border-radius: 7px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.zoom-control .icon-button {
  width: 32px;
  height: 32px;
  box-shadow: none;
}

.zoom-value {
  width: 55px;
  height: 32px;
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 11px;
}

.zoom-value:hover {
  color: var(--accent);
}

.minimap {
  position: absolute;
  z-index: 14;
  right: 18px;
  bottom: 60px;
  width: 190px;
  height: 128px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.minimap-header {
  display: flex;
  height: 30px;
  align-items: center;
  justify-content: space-between;
  padding: 0 5px 0 9px;
  border-bottom: 1px solid var(--line);
  color: var(--text-faint);
  font-size: 10px;
}

.minimap-canvas {
  position: relative;
  width: 100%;
  height: 98px;
  overflow: hidden;
  background-color: var(--canvas);
  background-image: radial-gradient(circle, var(--line) 0.7px, transparent 0.8px);
  background-size: 10px 10px;
}

.mini-node-dot {
  position: absolute;
  min-width: 4px;
  min-height: 3px;
  border-radius: 1px;
  background: var(--node-color, var(--accent));
}

.inspector-header {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 13px 10px 16px;
  border-bottom: 1px solid var(--line);
}

.inspector-content {
  min-height: 0;
  overflow: auto;
  scrollbar-color: var(--line-strong) transparent;
  scrollbar-width: thin;
}

.inspector-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 12px 14px 0;
  padding: 3px;
  border-radius: 7px;
  background: var(--surface-strong);
}

.inspector-tab {
  height: 29px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--text-faint);
  cursor: pointer;
  font-size: 11px;
}

.inspector-tab.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.inspector-section {
  padding: 15px 14px;
  border-bottom: 1px solid var(--line);
}

.inspector-section:last-child {
  border-bottom: 0;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.section-title h3 {
  margin: 0;
  color: var(--text-soft);
  font-size: 11px;
  font-weight: 680;
}

.section-title span {
  color: var(--text-faint);
  font-size: 10px;
}

.field-label {
  display: block;
  margin: 0 0 6px;
  color: var(--text-faint);
  font-size: 10px;
}

.text-field,
.select-field,
.note-field,
.ai-prompt {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-muted);
  color: var(--text);
}

.text-field,
.select-field {
  height: 34px;
  padding: 0 10px;
  font-size: 12px;
}

.note-field,
.ai-prompt {
  min-height: 96px;
  padding: 9px 10px;
  resize: vertical;
  line-height: 1.5;
  font-size: 12px;
}

.note-field::placeholder,
.ai-prompt::placeholder {
  color: var(--text-faint);
}

.format-row,
.color-grid,
.shape-grid,
.theme-grid,
.inline-fields,
.icon-grid {
  display: grid;
  gap: 7px;
}

.format-row {
  grid-template-columns: repeat(4, 1fr);
}

.segmented-button {
  display: grid;
  height: 34px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-soft);
  font-size: 12px;
}

.segmented-button:hover,
.segmented-button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.color-grid {
  grid-template-columns: repeat(8, 1fr);
}

.color-swatch {
  position: relative;
  width: 24px;
  height: 24px;
  justify-self: center;
  border: 2px solid var(--surface);
  border-radius: 50%;
  background: var(--swatch);
  box-shadow: 0 0 0 1px var(--line-strong);
}

.color-swatch:hover,
.color-swatch.active {
  box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--swatch);
}

.color-swatch.active::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 8px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  content: "";
  transform: translate(-50%, -60%) rotate(45deg);
}

.shape-grid {
  grid-template-columns: repeat(3, 1fr);
}

.shape-button {
  display: flex;
  height: 54px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-faint);
  gap: 6px;
}

.shape-button:hover,
.shape-button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.shape-demo {
  width: 36px;
  height: 15px;
  border: 1.5px solid currentColor;
  border-radius: 4px;
}

.shape-demo.pill {
  border-radius: 8px;
}

.shape-demo.line {
  height: 10px;
  border: 0;
  border-bottom: 2px solid currentColor;
  border-radius: 0;
}

.shape-button span:last-child {
  font-size: 9px;
}

.theme-grid {
  grid-template-columns: repeat(2, 1fr);
}

.theme-tile {
  position: relative;
  height: 68px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--theme-bg, var(--surface));
}

.theme-tile:hover,
.theme-tile.active {
  border-color: var(--accent);
}

.theme-tile.active::after {
  position: absolute;
  top: 5px;
  right: 5px;
  display: grid;
  width: 16px;
  height: 16px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  content: "✓";
  font-size: 9px;
}

.theme-map-root,
.theme-map-branch {
  position: absolute;
  height: 7px;
  border-radius: 4px;
}

.theme-map-root {
  top: 29px;
  left: 12px;
  width: 26px;
  background: var(--theme-root, var(--accent));
}

.theme-map-branch {
  left: 49px;
  width: 24px;
  background: var(--theme-branch, var(--blue));
}

.theme-map-branch.b1 { top: 14px; }
.theme-map-branch.b2 { top: 30px; background: var(--theme-branch-2, var(--coral)); }
.theme-map-branch.b3 { top: 46px; background: var(--theme-branch-3, var(--amber)); }

.inline-fields {
  grid-template-columns: 1fr 1fr;
}

.range-field {
  width: 100%;
  accent-color: var(--accent);
}

.icon-grid {
  grid-template-columns: repeat(6, 1fr);
}

.icon-choice {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
  font-size: 15px;
}

.icon-choice:hover,
.icon-choice.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-chip {
  display: inline-flex;
  height: 25px;
  align-items: center;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface-muted);
  color: var(--text-soft);
  font-size: 10px;
  gap: 5px;
}

.tag-chip button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text-faint);
  cursor: pointer;
}

.inspector-empty {
  display: flex;
  min-height: 260px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 24px;
  color: var(--text-faint);
  text-align: center;
}

.inspector-empty svg {
  width: 32px;
  height: 32px;
  margin-bottom: 10px;
}

.inspector-empty p {
  margin: 0;
  font-size: 11px;
  line-height: 1.6;
}

.statusbar {
  position: relative;
  z-index: 40;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: var(--statusbar-height);
  padding: 0 10px;
  background: var(--surface);
  border-top: 1px solid var(--line);
  color: var(--text-faint);
  font-size: 10px;
}

.status-left,
.status-center,
.status-right {
  display: flex;
  align-items: center;
  gap: 7px;
}

.status-center {
  justify-self: center;
}

.status-right {
  justify-self: end;
}

.status-separator {
  width: 1px;
  height: 12px;
  background: var(--line);
}

.status-link {
  padding: 0;
  color: var(--text-faint);
  font-size: 10px;
}

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

.menu-layer,
.modal-layer {
  position: fixed;
  inset: 0;
  z-index: 100;
}

.menu-layer {
  pointer-events: none;
}

.menu-layer[hidden],
.modal-layer[hidden],
.minimap[hidden] {
  display: none;
}

.dropdown-menu {
  position: absolute;
  z-index: 101;
  min-width: 222px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
  pointer-events: auto;
}

.dropdown-item {
  display: grid;
  width: 100%;
  min-height: 34px;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  align-items: center;
  padding: 4px 8px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  text-align: left;
  gap: 7px;
}

.dropdown-item:hover {
  background: var(--surface-strong);
  color: var(--text);
}

.dropdown-item .shortcut {
  color: var(--text-faint);
  font-size: 10px;
}

.dropdown-item.danger {
  color: var(--coral);
}

.dropdown-separator {
  height: 1px;
  margin: 5px 4px;
  background: var(--line);
}

.modal-layer {
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(18, 29, 24, 0.36);
  backdrop-filter: blur(3px);
}

.modal {
  width: min(880px, calc(100vw - 38px));
  max-height: min(760px, calc(100vh - 38px));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 30px 70px rgba(21, 39, 31, 0.22);
}

.modal.small {
  width: min(500px, calc(100vw - 38px));
}

.modal-header {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px 12px 20px;
  border-bottom: 1px solid var(--line);
}

.modal-title h2 {
  margin: 0;
  font-size: 17px;
}

.modal-title p {
  margin: 4px 0 0;
  color: var(--text-faint);
  font-size: 11px;
}

.modal-body {
  max-height: calc(100vh - 180px);
  padding: 18px 20px 20px;
  overflow: auto;
}

.modal-footer {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: flex-end;
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  gap: 8px;
}

.template-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.template-card {
  min-width: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  text-align: left;
}

.template-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 22px rgba(31, 54, 44, 0.1);
}

.template-card-preview {
  position: relative;
  height: 130px;
  overflow: hidden;
  background: var(--template-bg, var(--surface-muted));
  border-bottom: 1px solid var(--line);
}

.template-card-copy {
  padding: 11px 12px 12px;
}

.template-card-copy strong {
  display: block;
  font-size: 12px;
}

.template-card-copy span {
  display: block;
  min-height: 30px;
  margin-top: 5px;
  color: var(--text-faint);
  font-size: 10px;
  line-height: 1.5;
}

.preview-map-root,
.preview-map-node,
.preview-map-line {
  position: absolute;
}

.preview-map-root,
.preview-map-node {
  display: grid;
  height: 21px;
  place-items: center;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(26, 43, 36, 0.1);
  font-size: 6px;
}

.preview-map-root {
  top: 54px;
  left: calc(50% - 27px);
  width: 54px;
  background: var(--accent);
  color: #fff;
}

.preview-map-node {
  width: 44px;
  background: var(--surface);
  color: var(--text-soft);
}

.preview-map-node.p1 { top: 17px; right: 14px; border-left: 2px solid var(--blue); }
.preview-map-node.p2 { top: 54px; right: 8px; border-left: 2px solid var(--coral); }
.preview-map-node.p3 { top: 91px; right: 17px; border-left: 2px solid var(--amber); }
.preview-map-node.p4 { top: 26px; left: 13px; border-right: 2px solid var(--violet); }
.preview-map-node.p5 { top: 82px; left: 10px; border-right: 2px solid var(--accent); }

.preview-map-line {
  z-index: 0;
  height: 1px;
  background: var(--line-strong);
  transform-origin: left center;
}

.preview-map-line.pm1 { top: 63px; left: 50%; width: 75px; transform: rotate(-28deg); }
.preview-map-line.pm2 { top: 65px; left: 50%; width: 70px; transform: rotate(0deg); }
.preview-map-line.pm3 { top: 67px; left: 50%; width: 75px; transform: rotate(27deg); }
.preview-map-line.pm4 { top: 62px; left: 50%; width: 76px; transform: rotate(207deg); }
.preview-map-line.pm5 { top: 67px; left: 50%; width: 74px; transform: rotate(153deg); }

.export-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.export-option {
  display: flex;
  min-height: 128px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text-soft);
  cursor: pointer;
  gap: 9px;
}

.export-option:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.export-option svg {
  width: 28px;
  height: 28px;
}

.export-option strong {
  font-size: 12px;
}

.export-option span {
  color: var(--text-faint);
  font-size: 10px;
}

.shortcut-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 24px;
}

.shortcut-row {
  display: flex;
  min-height: 40px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 11px;
}

.keys {
  display: flex;
  gap: 4px;
}

.key {
  display: inline-grid;
  min-width: 24px;
  height: 22px;
  place-items: center;
  padding: 0 6px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--surface-muted);
  color: var(--text-soft);
  font-size: 9px;
}

.share-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.share-box input {
  min-width: 0;
  height: 38px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-muted);
  color: var(--text-soft);
  font-size: 11px;
}

.share-note {
  display: flex;
  align-items: flex-start;
  margin-top: 12px;
  padding: 10px;
  border-radius: 6px;
  background: var(--amber-soft);
  color: color-mix(in srgb, var(--amber) 70%, var(--text));
  font-size: 10px;
  line-height: 1.5;
  gap: 7px;
}

.clear-warning {
  display: flex;
  align-items: flex-start;
  padding: 13px;
  border: 1px solid color-mix(in srgb, var(--coral) 34%, var(--line));
  border-radius: 7px;
  background: var(--coral-soft);
  color: var(--coral);
  gap: 10px;
}

.clear-warning > svg {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.clear-warning strong,
.clear-warning span {
  display: block;
}

.clear-warning strong {
  color: var(--text);
  font-size: 12px;
}

.clear-warning span {
  margin-top: 5px;
  color: var(--text-soft);
  font-size: 10px;
  line-height: 1.6;
}

.share-note svg {
  width: 15px;
  height: 15px;
  flex: 0 0 15px;
}

.drawer {
  position: fixed;
  z-index: 103;
  top: 0;
  right: 0;
  width: min(420px, 100vw);
  height: 100vh;
  overflow: auto;
  background: var(--surface);
  box-shadow: -20px 0 48px rgba(22, 37, 30, 0.18);
  animation: drawer-in 180ms ease-out;
}

@keyframes drawer-in {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

.drawer-header {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px 12px 20px;
  border-bottom: 1px solid var(--line);
}

.drawer-heading {
  display: flex;
  align-items: center;
  gap: 10px;
}

.drawer-heading-icon {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 7px;
  background: var(--accent-soft);
  color: var(--accent);
}

.drawer-heading h2 {
  margin: 0;
  font-size: 15px;
}

.drawer-heading p {
  margin: 3px 0 0;
  color: var(--text-faint);
  font-size: 10px;
}

.drawer-body {
  padding: 18px 20px;
}

.ai-intro {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-muted);
  color: var(--text-soft);
  font-size: 11px;
  line-height: 1.6;
}

.ai-method {
  margin-top: 10px;
  padding: 11px 12px;
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  background: var(--accent-soft);
  color: var(--text-soft);
  font-size: 10px;
  line-height: 1.65;
}

.ai-method strong {
  display: block;
  margin-bottom: 4px;
  color: var(--accent-strong);
  font-size: 11px;
}

.suggestions {
  display: flex;
  flex-wrap: wrap;
  margin: 13px 0;
  gap: 6px;
}

.suggestion-chip {
  min-height: 28px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-soft);
  font-size: 10px;
}

.suggestion-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

.toast-region {
  position: fixed;
  z-index: 160;
  top: 82px;
  left: 50%;
  display: flex;
  width: min(380px, calc(100vw - 32px));
  align-items: center;
  flex-direction: column;
  gap: 7px;
  pointer-events: none;
  transform: translateX(-50%);
}

.toast {
  display: flex;
  min-height: 38px;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--text);
  color: var(--surface);
  box-shadow: var(--shadow-md);
  font-size: 11px;
  gap: 8px;
  animation: toast-in 180ms ease-out;
}

.toast svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-7px); }
  to { opacity: 1; transform: translateY(0); }
}

.presentation-mode .topbar,
.presentation-mode .commandbar,
.presentation-mode .left-panel,
.presentation-mode .right-panel,
.presentation-mode .statusbar,
.presentation-mode .canvas-hint {
  display: none;
}

.presentation-mode.app-shell {
  display: block;
}

.presentation-mode .workspace {
  display: block;
  width: 100%;
  height: 100%;
}

.presentation-mode .canvas-area {
  width: 100%;
  height: 100%;
}

.presentation-exit {
  position: fixed;
  z-index: 130;
  top: 18px;
  right: 18px;
  display: flex;
  height: 36px;
  align-items: center;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-soft);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  gap: 7px;
}

.presentation-exit svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.noscript-card {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: grid;
  place-items: center;
  background: #f5f7f6;
  color: #1d2723;
  font: 14px var(--font);
}

@media (max-width: 1280px) {
  :root {
    --left-panel-width: 232px;
    --right-panel-width: 270px;
  }

  .topbar {
    grid-template-columns: 178px minmax(180px, 1fr) auto;
    gap: 10px;
  }

  .brand-copy span,
  .save-state {
    display: none;
  }

  .topbar-actions .ghost-button span {
    display: none;
  }

  .topbar-actions .ghost-button {
    width: 36px;
    padding: 0;
  }

  .secondary-tools .tool-button:nth-child(n + 4) {
    display: none;
  }
}

@media (max-width: 1060px) {
  :root {
    --left-panel-width: 220px;
  }

  .workspace {
    grid-template-columns: var(--left-panel-width) minmax(0, 1fr);
  }

  .workspace.left-collapsed {
    grid-template-columns: 0 minmax(0, 1fr);
  }

  .right-panel {
    position: absolute;
    top: calc(var(--topbar-height) + var(--commandbar-height));
    right: 0;
    bottom: var(--statusbar-height);
    width: var(--right-panel-width);
    border-left: 1px solid var(--line);
    box-shadow: -12px 0 24px rgba(22, 37, 30, 0.08);
  }

  .right-collapsed .right-panel {
    transform: translateX(100%);
  }

  .view-tools .tool-button:nth-child(1) {
    display: none;
  }
}

@media (max-width: 840px) {
  :root {
    --topbar-height: 58px;
    --commandbar-height: 62px;
  }

  .topbar {
    grid-template-columns: auto minmax(0, 1fr) auto;
    padding: 0 10px;
  }

  .brand-block {
    min-width: 0;
  }

  .brand-copy {
    display: none;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    flex-basis: 32px;
  }

  .document-title {
    width: 100%;
    min-width: 0;
    font-size: 13px;
  }

  .document-title-line .icon-button,
  .history-group,
  .topbar-divider,
  .topbar-actions .ghost-button,
  .topbar-actions .outline-button,
  .avatar-button {
    display: none;
  }

  .topbar-actions .primary-button span {
    display: none;
  }

  .topbar-actions .primary-button {
    width: 36px;
    padding: 0;
  }

  .mobile-menu-button {
    display: inline-grid;
    grid-column: 1;
    grid-row: 1;
  }

  .brand-block {
    display: none;
  }

  .document-heading {
    grid-column: 2;
  }

  .topbar-actions {
    grid-column: 3;
  }

  .commandbar {
    padding: 0 5px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .commandbar::-webkit-scrollbar {
    display: none;
  }

  .menu-nav,
  .command-divider:first-of-type,
  .secondary-tools,
  .view-tools .tool-button:first-child {
    display: none;
  }

  .tool-button {
    min-width: 57px;
  }

  .workspace,
  .workspace.left-collapsed,
  .workspace.right-collapsed,
  .workspace.left-collapsed.right-collapsed {
    display: block;
  }

  .left-panel {
    position: fixed;
    z-index: 80;
    top: var(--topbar-height);
    bottom: var(--statusbar-height);
    left: 0;
    width: min(290px, 84vw);
    box-shadow: 16px 0 36px rgba(22, 37, 30, 0.16);
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
  }

  .workspace.mobile-sidebar-open .left-panel {
    transform: translateX(0);
    opacity: 1;
    pointer-events: auto;
  }

  .right-panel {
    position: fixed;
    z-index: 82;
    top: var(--topbar-height);
    right: 0;
    bottom: var(--statusbar-height);
    width: min(310px, 88vw);
    box-shadow: -16px 0 36px rgba(22, 37, 30, 0.16);
    transform: translateX(100%);
  }

  .workspace.mobile-inspector-open .right-panel {
    transform: translateX(0);
    opacity: 1;
    pointer-events: auto;
  }

  .canvas-area {
    width: 100%;
    height: 100%;
  }

  .canvas-hint {
    display: none;
  }

  .canvas-toolbar-float {
    top: 10px;
    right: 10px;
    left: 10px;
  }

  .breadcrumb {
    max-width: 62%;
  }

  .zoom-control {
    right: 10px;
    bottom: 12px;
  }

  .minimap {
    right: 10px;
    bottom: 54px;
  }

  .statusbar {
    grid-template-columns: 1fr auto;
  }

  .status-center,
  .status-right > span,
  .status-right .status-separator,
  .status-right .status-link {
    display: none;
  }

  .template-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .shortcut-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .primary-tools [data-action="select-mode"],
  .primary-tools [data-action="add-connection"],
  .primary-tools [data-action="add-summary"],
  .command-divider,
  .view-tools .tool-button:first-child {
    display: none;
  }

  .command-spacer {
    min-width: 0;
  }

  .view-tools {
    margin-left: auto;
  }

  .tool-button {
    min-width: 58px;
  }

  .node-action-bar {
    max-width: calc(100% - 16px);
    top: 58px !important;
    bottom: auto;
    left: 50% !important;
    transform: translateX(-50%) !important;
  }

  .node-action-button {
    min-width: 42px;
    height: 34px;
    justify-content: center;
    padding: 0 7px;
  }

  .template-grid,
  .export-grid {
    grid-template-columns: 1fr;
  }

  .template-card-preview {
    height: 112px;
  }

  .modal-layer {
    padding: 10px;
  }

  .modal,
  .modal.small {
    width: calc(100vw - 20px);
    max-height: calc(100vh - 20px);
  }

  .modal-body {
    padding: 14px;
  }

  .modal-title p {
    display: none;
  }

  .canvas-quick-actions .icon-button:first-child {
    display: none;
  }

  .share-box {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  .topbar,
  .commandbar,
  .left-panel,
  .right-panel,
  .statusbar,
  .canvas-toolbar-float,
  .canvas-hint,
  .zoom-control,
  .minimap {
    display: none !important;
  }

  .app-shell,
  .workspace,
  .canvas-area {
    display: block;
    width: 100%;
    height: 100%;
  }
}

/* One-sided line map: labels sit above their incoming branch and every endpoint adds a child. */
.left-panel {
  grid-template-columns: minmax(0, 1fr);
}

.canvas-area,
.canvas-viewport {
  background-color: #ffffff;
}

.canvas-viewport {
  background-image: radial-gradient(circle, color-mix(in srgb, var(--line-strong) 54%, transparent) 1px, transparent 1.1px);
}

body[data-theme="dark"] .canvas-area,
body[data-theme="dark"] .canvas-viewport {
  background-color: var(--canvas);
}

.connection-path {
  stroke-width: var(--connection-width, 4px);
  stroke-linecap: round;
  opacity: 1;
}

.connection-path.trunk,
.connection-path.lead {
  stroke-width: 4px;
}

.summary-brace {
  fill: none;
  stroke: #ef2020;
  stroke-width: 3px;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.summary-label {
  fill: #ef2020;
  font-family: var(--font);
  font-size: 18px;
  font-weight: 520;
  paint-order: stroke;
  stroke: var(--canvas);
  stroke-width: 5px;
  stroke-linejoin: round;
}

.mind-node.line-node {
  display: block;
  width: var(--node-width);
  height: var(--node-height);
  min-height: var(--node-height);
  padding: 0;
  overflow: visible;
  border: 0 !important;
  border-radius: 0;
  background: transparent !important;
  color: var(--node-text, var(--text));
  box-shadow: none !important;
  cursor: move;
}

.mind-node.line-node::before {
  display: none;
}

.mind-node.line-node:hover,
.mind-node.line-node.selected,
.mind-node.line-node.selected.root {
  border: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

.line-node .node-content {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
}

.node-label {
  position: absolute;
  right: 32px;
  bottom: 38px;
  left: 2px;
  overflow: visible;
  color: var(--node-text, var(--text));
  line-height: 1.25;
  text-align: center;
  white-space: nowrap;
  pointer-events: none;
}

.line-label {
  font-weight: 500;
}

.root-label {
  bottom: 40px;
  color: var(--node-text, var(--text));
  font-weight: 760;
}

.node-junction {
  position: absolute;
  right: 0;
  bottom: 4px;
  z-index: 4;
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  padding: 0 0 2px;
  border: 0;
  border-radius: 50%;
  background: #4b7df3;
  color: #ffffff;
  box-shadow: 0 1px 3px rgba(36, 82, 181, 0.22);
  cursor: pointer;
  font-family: Arial, sans-serif;
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.node-junction::after {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  content: "";
}

.line-node:hover .node-junction {
  background: #386de8;
  transform: scale(1.08);
}

.line-node.selected .node-junction {
  background: #356be9;
  box-shadow: 0 0 0 4px rgba(75, 125, 243, 0.2), 0 2px 5px rgba(36, 82, 181, 0.24);
}

.line-node .collapse-control {
  top: auto;
  right: 3px !important;
  bottom: -19px;
  left: auto !important;
  z-index: 5;
  width: 22px;
  height: 18px;
  border-color: color-mix(in srgb, #4b7df3 32%, var(--line));
  background: var(--surface);
  color: #4b7df3;
  transform: none;
}

.line-node.selected .collapse-control {
  opacity: 0;
}

.line-node:hover .collapse-control,
.line-node .collapse-control.has-hidden {
  opacity: 1;
}

.line-node .node-editor {
  position: absolute;
  right: 32px;
  bottom: 24px;
  left: 0;
  width: calc(100% - 32px);
  height: 34px;
  border: 1px solid #4b7df3;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 0 0 3px rgba(75, 125, 243, 0.14);
  font-size: inherit;
}

.node-action-button.add {
  background: var(--blue-soft);
  color: var(--blue);
}

.node-action-button.delete {
  color: #d94841;
  font-weight: 650;
}

.node-action-button.delete:hover {
  background: #fff0ef;
  color: #c9302c;
}

body[data-theme="dark"] .node-action-button.delete:hover {
  background: var(--coral-soft);
}

@media (max-width: 840px) {
  .left-panel {
    grid-template-columns: minmax(0, 1fr);
  }
}