:root {
  color-scheme: light;
  --bg: #eef2f7;
  --surface: #ffffff;
  --surface-muted: #f7f9fc;
  --border: #d9e1ec;
  --border-strong: #b8c4d6;
  --text: #172033;
  --muted: #68758a;
  --accent: #0972d3;
  --accent-dark: #075ca8;
  --danger: #c9252d;
  --shadow: 0 16px 42px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

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

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

button,
select,
input,
textarea {
  font: inherit;
}

button,
.file-button {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  min-height: 36px;
  padding: 0 12px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
}

button.summary-row {
  width: 100%;
  border: 0;
  border-radius: 0;
  min-height: 0;
  padding: 10px 11px;
  background: transparent;
}

button:hover,
.file-button:hover {
  border-color: var(--accent);
}

button.secondary {
  background: #182033;
  border-color: #182033;
  color: #ffffff;
}

button.secondary:hover {
  background: #263148;
}

button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

#downloadButton {
  min-width: 88px;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease, box-shadow 150ms ease;
}

#downloadButton:disabled {
  cursor: progress;
  opacity: 0.82;
}

#downloadButton.saving {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(9, 114, 211, 0.14);
}

#downloadButton.saved {
  background: #127a3a;
  border-color: #127a3a;
  color: #ffffff;
  box-shadow: 0 0 0 3px rgba(18, 122, 58, 0.16);
}

#downloadButton.error {
  background: var(--danger);
  border-color: var(--danger);
  color: #ffffff;
  box-shadow: 0 0 0 3px rgba(201, 37, 45, 0.16);
}

.dropdown-button::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
}

.dropdown-button {
  max-width: 220px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-button input {
  display: none;
}

.app-shell {
  height: 100vh;
  min-height: 600px;
  display: grid;
  grid-template-rows: 64px 1fr;
}

.topbar {
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  gap: 16px;
}

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

h1 {
  margin: 0;
  font-size: 16px;
  line-height: 1.05;
}

.brand-title span {
  display: block;
}

.doc-title {
  color: var(--muted);
  font-size: 12px;
  max-width: 52vw;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: 280px 1fr;
}

.control-panel {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 16px;
  overflow: auto;
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
}

.field label,
.field-label,
.panel-heading {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

select,
input[type="number"],
input[type="text"],
textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  padding: 0 9px;
}

select,
input[type="number"],
input[type="text"] {
  height: 38px;
}

input[type="number"],
input[type="text"],
textarea {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

textarea {
  min-height: 72px;
  padding: 8px 9px;
  line-height: 1.35;
  resize: vertical;
}

textarea:disabled {
  color: var(--muted);
  background: var(--surface-muted);
}

.edit-tools {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-muted);
  padding: 12px;
  margin: 16px 0;
}

.grouped-heading {
  margin-top: 14px;
}

.field.compact {
  gap: 6px;
  margin: 10px 0 0;
}

.resource-picker {
  display: grid;
  gap: 12px;
  max-height: 360px;
  margin-top: 10px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  overflow: auto;
}

.resource-picker-group {
  display: grid;
  gap: 6px;
}

.resource-picker-heading {
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.resource-picker-option {
  width: 100%;
  display: grid;
  grid-template-columns: 28px 1fr;
  grid-template-rows: auto auto;
  column-gap: 9px;
  row-gap: 1px;
  min-height: 42px;
  padding: 7px;
  justify-content: start;
  text-align: left;
}

.resource-picker-option img,
.resource-display-row img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  grid-row: 1 / span 2;
  align-self: center;
}

.resource-picker-option span {
  font-size: 13px;
  font-weight: 700;
}

.resource-picker-option small,
.resource-display-text small {
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
}

.range-field label {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.range-field output {
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.selection-panel {
  margin: 0;
}

.path-editor-panel {
  margin: 0;
}

.selection-summary {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
  margin: 8px 0 10px;
  overflow-wrap: anywhere;
}

.selection-panel button {
  width: 100%;
  margin-top: 2px;
}

.multi-selection-list {
  display: grid;
  gap: 7px;
  margin: 8px 0 10px;
}

.multi-selection-row {
  display: grid;
  gap: 2px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  font-size: 12px;
  line-height: 1.25;
}

.multi-selection-row strong {
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.multi-selection-row small {
  color: var(--muted);
  overflow-wrap: anywhere;
}

.readonly-value {
  min-height: 36px;
  display: flex;
  align-items: center;
  padding: 8px 9px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.connector-label-panel {
  border-top: 1px solid var(--border);
  margin-top: 14px;
  padding-top: 12px;
}

.cloudfront-config-panel {
  border-top: 1px solid var(--border);
  margin-top: 14px;
  padding-top: 12px;
}

.compact-toggle {
  margin-top: 8px;
}

.node-relationship-panel {
  border-top: 1px solid var(--border);
  margin-top: 14px;
  padding-top: 12px;
}

.core-relationship-panel {
  border-top: 1px solid var(--border);
  margin-top: 14px;
  padding-top: 12px;
}

.core-relationship-list {
  display: grid;
  gap: 12px;
}

.core-relationship-section {
  display: grid;
  gap: 8px;
}

.core-relationship-heading {
  color: var(--text);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.core-relationship-field {
  display: grid;
  gap: 5px;
}

.core-relationship-label {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
}

.relationship-panel-toggle {
  width: 100%;
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.relationship-panel-toggle strong {
  min-width: 22px;
  min-height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 11px;
}

.relationship-panel-content {
  margin-top: 4px;
}

.node-relationship-list {
  display: grid;
  gap: 8px;
  margin: 9px 0 10px;
}

.node-relationship-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
}

button.node-relationship-row {
  width: 100%;
  min-height: 0;
  justify-content: stretch;
  text-align: left;
  color: inherit;
}

.add-relationship-row {
  border-style: dashed;
}

.missing-relationship-row {
  border-style: dashed;
  background: transparent;
}

.missing-relationship-row strong {
  color: var(--muted);
}

.add-relationship-row strong {
  color: var(--accent-dark);
}

.node-relationship-text {
  min-width: 0;
  display: grid;
  gap: 2px;
  font-size: 12px;
  line-height: 1.25;
}

.node-relationship-text strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.node-relationship-text small,
.node-relationship-text span {
  color: var(--muted);
  font-size: 11px;
  overflow-wrap: anywhere;
}

.selection-panel .node-relationship-row button.icon-action {
  width: auto;
  min-height: 28px;
  padding: 0 8px;
  margin: 0;
  font-size: 11px;
}

.icon-action.danger {
  color: var(--danger);
  border-color: rgba(201, 37, 45, 0.38);
}

.node-relationship-form {
  display: grid;
  gap: 8px;
}

.behavior-feature-list {
  display: grid;
  gap: 8px;
  margin-top: 9px;
}

.behavior-feature-row {
  grid-template-columns: minmax(0, 1fr) minmax(116px, 42%);
}

.behavior-feature-select {
  min-height: 32px;
  margin: 0;
}

.behavior-remove-button {
  width: 100%;
  margin-top: 10px;
  border-color: rgba(201, 37, 45, 0.42);
  color: var(--danger);
  font-weight: 700;
}

.behavior-remove-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.path-sequence-list {
  display: grid;
  gap: 7px;
  margin: 12px 0;
}

.path-sequence-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
}

.path-relationship-row {
  margin-left: 14px;
  border-style: dashed;
  background: #ffffff;
}

.path-relationship-row::before {
  content: "";
  width: 2px;
  height: 18px;
  justify-self: center;
  grid-column: 1 / -1;
  grid-row: 1;
  background: var(--accent);
  opacity: 0.45;
}

.path-sequence-row button.icon-action {
  width: auto;
  min-height: 28px;
  padding: 0 8px;
  margin: 0;
  font-size: 11px;
}

.path-next-field {
  border-top: 1px solid var(--border);
  margin-top: 12px;
  padding-top: 12px;
}

.path-next-field button {
  width: 100%;
}

.toggle-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 32px;
  padding: 7px 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #ffffff;
  font-size: 13px;
}

.toggle-row input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.summary {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface-muted);
  margin: 16px 0;
}

.summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 11px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.summary-row:last-child {
  border-bottom: 0;
}

.summary-action {
  cursor: pointer;
}

.summary-action:hover {
  color: var(--accent);
}

.summary-row span {
  color: var(--muted);
}

.resource-list-panel {
  padding: 9px;
  border-bottom: 1px solid var(--border);
  background: #ffffff;
}

.resource-display-list {
  display: grid;
  gap: 8px;
}

.resource-display-row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 84px;
  align-items: center;
  gap: 8px;
}

.resource-display-text {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.resource-display-text strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12px;
}

.resource-display-row select {
  height: 32px;
  padding: 0 6px;
  font-size: 12px;
}

.issues {
  margin-top: 18px;
}

.status-text {
  margin-top: 8px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-muted);
  color: var(--muted);
  font-size: 13px;
}

.status-text.error {
  color: var(--danger);
  border-color: rgba(201, 37, 45, 0.32);
  background: #fff5f5;
}

.issue-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.issue-item {
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: 7px;
  padding: 8px 9px;
  background: #ffffff;
  font-size: 12px;
  line-height: 1.35;
}

.issue-item.error {
  border-left-color: var(--danger);
}

.issue-code {
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  margin-bottom: 4px;
}

.viewer-panel {
  min-width: 0;
  min-height: 0;
  padding: 18px;
  overflow: hidden;
  position: relative;
}

.floating-zoom-toolbar {
  position: absolute;
  z-index: 12;
  top: 30px;
  left: 30px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px;
  border: 1px solid rgba(184, 196, 214, 0.78);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.16);
  backdrop-filter: blur(14px);
}

.zoom-pill {
  width: 34px;
  min-width: 34px;
  min-height: 30px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
}

.zoom-pill.fit-pill {
  width: auto;
  min-width: 44px;
  padding: 0 12px;
  font-size: 12px;
  letter-spacing: 0;
}

.zoom-pill:hover {
  background: rgba(9, 114, 211, 0.1);
  color: var(--accent-dark);
}

.zoom-pill:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.diagram-popover {
  position: absolute;
  z-index: 20;
  top: 18px;
  right: 18px;
  width: min(420px, calc(100% - 36px));
  max-height: calc(100% - 36px);
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 20px 58px rgba(15, 23, 42, 0.2);
  padding: 14px;
}

.export-popover {
  width: min(320px, calc(100% - 36px));
}

.export-popover button {
  width: 100%;
}

.project-popover {
  width: min(1080px, calc(100% - 36px));
}

.lens-popover {
  width: min(1120px, calc(100% - 36px));
}

.choice-popover {
  width: min(380px, calc(100% - 36px));
}

.path-popover {
  width: min(980px, calc(100% - 36px));
}

.path-popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.path-popover-header .popover-heading {
  margin-bottom: 0;
}

.path-popover-header .path-toolbar {
  flex: 0 0 auto;
}

.popover-heading {
  color: var(--text);
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 12px;
}

.diagram-popover .field:last-child,
.diagram-popover .toggle-list:last-child,
.diagram-popover .resource-picker:last-child {
  margin-bottom: 0;
}

.diagram-popover .toggle-row {
  background: var(--surface);
}

.diagram-popover .resource-picker {
  max-height: none;
  margin-top: 0;
  background: var(--surface-muted);
}

.project-pane-grid,
.lens-pane-grid,
.diagram-pane-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(260px, 1.2fr) minmax(260px, 1fr);
  gap: 16px;
}

.lens-pane-grid {
  grid-template-columns: minmax(240px, 0.9fr) minmax(220px, 0.8fr) minmax(320px, 1.2fr);
}

.diagram-pane {
  min-width: 0;
}

.diagram-pane .summary {
  margin: 12px 0 0;
}

.detail-list {
  display: grid;
  gap: 8px;
}

.detail-row {
  display: grid;
  gap: 2px;
  padding: 8px 9px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  font-size: 12px;
  line-height: 1.3;
}

.detail-row strong {
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.detail-row small,
.detail-row span,
.detail-empty {
  color: var(--muted);
  font-size: 11px;
}

.detail-empty {
  padding: 8px 9px;
}

.pane-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.pane-heading-row strong {
  min-width: 24px;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--muted);
  font-size: 11px;
}

.inline-details {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-muted);
  margin-bottom: 12px;
  overflow: hidden;
}

.inline-details summary {
  cursor: pointer;
  padding: 10px 11px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
}

.inline-details .resource-picker {
  max-height: 280px;
  border: 0;
  border-top: 1px solid var(--border);
  border-radius: 0;
}

.project-resource-list {
  display: grid;
  gap: 8px;
}

.project-resource-row {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  overflow: hidden;
}

.project-resource-row.expanded {
  border-color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
}

.project-resource-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px;
  align-items: stretch;
}

.project-resource-button {
  width: 100%;
  min-height: 48px;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  justify-content: stretch;
  text-align: left;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.project-resource-button img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.project-resource-remove {
  width: 28px;
  min-height: 48px;
  padding: 0;
  border: 0;
  border-left: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
}

.project-resource-remove:hover,
.project-resource-remove:focus-visible {
  color: var(--danger);
  background: #fff5f5;
}

.project-resource-relationships {
  padding: 8px;
  border-top: 1px solid var(--border);
  background: var(--surface-muted);
}

.path-group-grid {
  --path-group-columns: 1;
  display: grid;
  grid-template-columns: repeat(var(--path-group-columns), minmax(0, 1fr));
  gap: 14px;
  align-items: start;
}

.path-group-column {
  min-width: 0;
  display: grid;
  gap: 10px;
}

.path-toolbar {
  display: flex;
  gap: 8px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-muted);
}

.path-toolbar-button {
  flex: 1 1 0;
  min-height: 32px;
  padding: 0 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.path-toolbar-button.primary {
  background: #182033;
  border-color: #182033;
  color: #ffffff;
}

.path-toolbar-button.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.path-toolbar-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.path-group-heading {
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: #f4f8fd;
  color: var(--text);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.path-group-heading strong {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.path-group-heading span {
  min-width: 24px;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(9, 114, 211, 0.26);
  border-radius: 999px;
  background: #e8f3ff;
  color: var(--accent-dark);
  font-size: 11px;
}

.path-group-list {
  display: grid;
  gap: 8px;
  max-height: 320px;
  overflow: auto;
  padding-right: 4px;
}

.path-choice-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px;
  align-items: stretch;
  gap: 6px;
}

.path-delete-button {
  width: 28px;
  min-height: 0;
  padding: 0;
  border-color: var(--border);
  border-radius: 7px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
}

.path-delete-button:hover,
.path-delete-button:focus-visible {
  color: var(--danger);
  border-color: rgba(201, 37, 45, 0.4);
  background: #fff5f5;
}

.choice-list {
  display: grid;
  gap: 8px;
}

.choice-option {
  width: 100%;
  min-height: 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  justify-content: stretch;
  justify-items: start;
  align-content: center;
  padding: 10px 12px;
  text-align: left;
  border-color: var(--border);
  background: var(--surface);
}

.choice-option strong {
  color: var(--text);
  font-size: 13px;
  line-height: 1.2;
}

.choice-option span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.choice-option.selected {
  border-color: var(--accent);
  background: #eef7ff;
  box-shadow: inset 3px 0 0 var(--accent);
}

.choice-option.selected strong {
  color: var(--accent-dark);
}

.new-project-button {
  width: 100%;
  margin-top: 12px;
}

.viewer {
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow: auto;
  background:
    linear-gradient(90deg, rgba(119, 136, 163, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(119, 136, 163, 0.08) 1px, transparent 1px),
    #f8fafc;
  background-size: 12px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.viewer.dark-diagram {
  background:
    linear-gradient(90deg, rgba(0, 245, 255, 0.12) 1px, transparent 1px),
    linear-gradient(rgba(0, 245, 255, 0.12) 1px, transparent 1px),
    #050b14;
  border-color: #1f3b5c;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.34);
}

.viewer-panel:has(.viewer.dark-diagram) .floating-zoom-toolbar {
  border-color: rgba(0, 245, 255, 0.28);
  background: rgba(6, 16, 31, 0.78);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.38), 0 0 18px rgba(0, 245, 255, 0.12);
}

.viewer-panel:has(.viewer.dark-diagram) .zoom-pill {
  color: #dffbff;
}

.viewer-panel:has(.viewer.dark-diagram) .zoom-pill:hover {
  background: rgba(0, 245, 255, 0.14);
  color: #00f5ff;
}

.viewer.shift-pan-ready {
  cursor: grab;
}

.viewer.panning {
  cursor: grabbing;
}

.viewer.panning .diagram-canvas,
.viewer.panning .diagram-canvas svg,
.viewer.panning .diagram-canvas svg * {
  cursor: grabbing !important;
}

.diagram-canvas {
  min-width: 100%;
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 32px;
}

.diagram-canvas svg {
  display: block;
  max-width: none;
  background: #f5f7fb;
  border: 1px solid #dfe6f1;
  border-radius: 8px;
}

.diagram-canvas.dark-diagram svg {
  background: #07111f;
  border-color: #1f3b5c;
}

.diagram-canvas.dark-diagram .empty-state {
  color: #9bd7ff;
}

.diagram-canvas.editing svg .iu-resource,
.diagram-canvas.editing svg .iu-group,
.diagram-canvas.editing svg .iu-relationship,
.diagram-canvas.editing svg .iu-derived-badge,
.diagram-canvas.editing svg .iu-composite-selectable,
.diagram-canvas.editing svg .iu-edit-handle {
  cursor: grab;
  touch-action: none;
}

.diagram-canvas.editing svg .iu-cloudfront-behavior-sortable {
  cursor: ns-resize;
  touch-action: none;
}

.diagram-canvas.editing svg .iu-composite-behavior-title {
  cursor: pointer;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.diagram-canvas.editing svg .iu-relationship-hit {
  cursor: move;
  touch-action: none;
}

.diagram-canvas.editing svg .iu-relationship-label {
  cursor: grab;
  touch-action: none;
}

.diagram-canvas.editing svg .iu-dragging,
.diagram-canvas.editing svg .iu-dragging .iu-relationship-hit,
.diagram-canvas.editing svg .iu-dragging .iu-edit-handle {
  cursor: grabbing;
}

.diagram-canvas.editing svg .iu-edit-selected {
  outline: none;
}

.diagram-canvas.editing svg .iu-edit-selected .iu-icon-ring,
.diagram-canvas.editing svg .iu-edit-selected .iu-icon-ring-outline,
.diagram-canvas.editing svg .iu-edit-selected .iu-composite-frame,
.diagram-canvas.editing svg .iu-edit-selected > rect,
.diagram-canvas.editing svg .iu-edit-selected .iu-relationship-line {
  stroke: var(--accent);
  stroke-width: 3;
}

.diagram-canvas.editing svg .iu-cloudfront-behavior.iu-edit-selected > rect,
.diagram-canvas.editing svg .iu-api-gateway-route.iu-edit-selected > rect {
  stroke: var(--accent);
  stroke-width: 2.8;
}

.diagram-canvas.editing svg .iu-edit-selected.iu-composite-selectable > rect,
.diagram-canvas.editing svg .iu-edit-selected .iu-composite-frame {
  stroke: var(--accent);
  stroke-width: 3;
}

.diagram-canvas.editing svg .iu-selection-marquee {
  fill: rgba(44, 123, 229, 0.12);
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-dasharray: 6 4;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

.diagram-canvas.dark-diagram.editing svg .iu-selection-marquee {
  fill: rgba(0, 245, 255, 0.14);
  stroke: #00f5ff;
  filter: drop-shadow(0 0 5px rgba(0, 245, 255, 0.4));
}

.diagram-canvas.editing svg .iu-derived-badge.iu-edit-selected circle {
  stroke: var(--accent);
  stroke-width: 2.6;
}

.diagram-canvas.editing svg .iu-edit-handle {
  fill: #ffffff;
  stroke: var(--accent);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 2px 4px rgba(15, 23, 42, 0.22));
}

.diagram-canvas.dark-diagram.editing svg .iu-edit-handle,
.diagram-canvas.dark-diagram.editing svg .iu-dock-target.active {
  fill: #07111f;
  stroke: #00f5ff;
  filter: drop-shadow(0 0 6px rgba(0, 245, 255, 0.72));
}

.diagram-canvas.editing svg .iu-dock-target {
  fill: #ffffff;
  stroke: #6b7d94;
  stroke-width: 1.6;
  opacity: 0.82;
  vector-effect: non-scaling-stroke;
  cursor: crosshair;
}

.diagram-canvas.dark-diagram.editing svg .iu-dock-target {
  fill: #07111f;
  stroke: #9bd7ff;
}

.diagram-canvas.editing svg .iu-dock-target.current {
  fill: var(--accent);
  stroke: #ffffff;
  opacity: 1;
}

.diagram-canvas.dark-diagram.editing svg .iu-dock-target.current {
  fill: #00f5ff;
  stroke: #07111f;
}

.diagram-canvas.editing svg .iu-dock-target.active {
  fill: #ffffff;
  stroke: var(--accent);
  stroke-width: 3;
  opacity: 1;
}

.diagram-canvas.editing svg .iu-dock-handle {
  cursor: crosshair;
}

.diagram-canvas.editing svg .iu-resize-handle {
  cursor: nwse-resize;
}

.diagram-canvas.editing svg .iu-resize-handle[data-corner="ne"],
.diagram-canvas.editing svg .iu-resize-handle[data-corner="sw"] {
  cursor: nesw-resize;
}

.diagram-canvas.editing {
  user-select: none;
}

.empty-state {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 820px) {
  .app-shell {
    height: auto;
    min-height: 100vh;
    grid-template-rows: auto 1fr;
  }

  .topbar {
    align-items: flex-start;
    padding: 12px;
    flex-direction: column;
  }

  .top-actions {
    width: 100%;
  }

  .top-actions button,
  .top-actions .file-button {
    flex: 1;
  }

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

  .control-panel {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .viewer-panel {
    height: 70vh;
    padding: 12px;
  }

  .floating-zoom-toolbar {
    top: 22px;
    left: 22px;
  }

  .path-popover-header {
    align-items: stretch;
    flex-direction: column;
  }

  .project-pane-grid,
  .lens-pane-grid,
  .diagram-pane-grid,
  .path-group-grid {
    grid-template-columns: 1fr;
  }
}