:root {
  color-scheme: light;
  --bg: #f5f7f8;
  --panel: #ffffff;
  --panel-alt: #eef2f4;
  --border: #cfd8dc;
  --text: #20272b;
  --muted: #69757b;
  --accent: #276c9f;
  --accent-strong: #174c75;
  --canvas-bg: #f8fafb;
}

* {
  box-sizing: border-box;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
}

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

button {
  min-height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

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

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

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

.app-shell {
  display: grid;
  grid-template-rows: 48px 1fr 28px;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.app-title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}

.header-actions {
  display: flex;
  gap: 8px;
}

.editor-layout {
  display: grid;
  grid-template-columns: 400px minmax(360px, 1fr) 280px;
  min-height: 0;
}

.navigation-sidebar,
.properties-panel {
  min-height: 0;
  overflow: auto;
  border-color: var(--border);
  background: var(--panel);
}

.navigation-sidebar {
  display: grid;
  grid-template-columns: minmax(150px, 180px) minmax(200px, 1fr);
  border-right: 1px solid var(--border);
}

.file-explorer-rail,
.navigator-stack,
.navigation-panel {
  min-height: 0;
  background: var(--panel);
}

.file-explorer-panel {
  min-height: 100%;
}

.file-explorer-rail {
  min-width: 0;
  overflow: auto;
  border-right: 1px solid var(--border);
}

.navigator-stack {
  display: grid;
  grid-template-rows: 40px 1fr;
  min-width: 0;
}

.navigation-panel {
  min-width: 0;
  overflow: auto;
}

.navigation-switcher {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding: 4px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.navigation-switch-button {
  min-height: 28px;
  min-width: 0;
  padding: 3px 2px;
  white-space: nowrap;
  font-size: 11px;
}

.navigation-switch-button.is-active {
  border-color: #a8c6dc;
  background: #e7f1f8;
  color: var(--text);
  font-weight: 700;
}

.properties-panel {
  border-left: 1px solid var(--border);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 44px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}

.panel-title {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
}

.tree-switch-button {
  min-height: 28px;
  padding: 4px 8px;
  font-size: 12px;
}

.navigation-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 12px;
  list-style: none;
}

.navigation-list li {
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--muted);
}

.module-tree-panel .navigation-list li,
.variable-tree-panel .navigation-list li,
.control-actions-list li,
.features-list li {
  cursor: pointer;
}

.module-tree li,
.variable-tree li {
  margin-left: calc(var(--tree-depth, 0) * 14px);
}

.navigation-empty-state {
  color: var(--muted);
  cursor: default;
}

.control-action-name {
  color: var(--text);
  font-weight: 700;
}

.control-action-section {
  border-bottom: 1px solid var(--border);
}

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

.control-action-section-title {
  margin: 0;
  padding: 10px 12px 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.control-action-meta,
.feature-meta,
.feature-mode {
  margin-top: 2px;
  font-size: 12px;
}

.feature-name {
  color: var(--text);
  font-weight: 700;
}

.feature-mode {
  color: var(--accent-strong);
  font-weight: 700;
}

.feature-exit-button.is-available {
  border-color: var(--accent);
  background: #e7f1f8;
  color: var(--accent-strong);
  font-weight: 700;
}

.control-action-bucket {
  margin-top: 8px;
  display: grid;
  gap: 2px;
}

.control-action-bucket-title {
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
}

.control-action-bucket-values {
  font-size: 12px;
  line-height: 1.4;
  white-space: normal;
}

.navigation-list .is-selected {
  border-color: #a8c6dc;
  background: #e7f1f8;
  color: var(--text);
  font-weight: 700;
}

.navigation-list .is-active-tree {
  box-shadow: inset 3px 0 0 var(--accent);
}

.workspace {
  display: grid;
  grid-template-rows: 40px 1fr;
  min-width: 0;
  min-height: 0;
}

.tab-list {
  display: flex;
  align-items: end;
  gap: 2px;
  min-width: 0;
  padding: 6px 10px 0;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.tab-button {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  max-width: 190px;
  padding: 6px 12px;
  border-bottom-color: transparent;
  border-radius: 6px 6px 0 0;
  color: var(--muted);
}

.tab-button.is-active {
  background: var(--panel-alt);
  color: var(--text);
  font-weight: 700;
}

.tab-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tab-close-button {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1;
}

.tab-close-button:hover,
.tab-close-button:focus {
  background: #dfe7eb;
  color: var(--text);
  outline: none;
}

.tab-panel-host,
.tab-panel {
  min-width: 0;
  min-height: 0;
}

.tab-panel-host {
  display: grid;
}

.tab-panel {
  display: grid;
}

.module-editor {
  display: grid;
  grid-template-rows: 36px auto 1fr;
  min-width: 0;
  min-height: 0;
}

.module-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 4px 10px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.breadcrumb-mode-control {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.breadcrumb-filter-switch {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 26px;
  margin-right: 6px;
  padding: 3px 6px;
  border-color: transparent;
  background: transparent;
  font-size: 12px;
}

.breadcrumb-filter-switch:hover {
  border-color: var(--border);
}

.breadcrumb-filter-switch-track {
  position: relative;
  width: 26px;
  height: 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #dfe6ea;
}

.breadcrumb-filter-switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  transition: left 120ms ease, background 120ms ease;
}

.breadcrumb-filter-switch.is-active .breadcrumb-filter-switch-track {
  border-color: var(--accent);
  background: #d9ecf8;
}

.breadcrumb-filter-switch.is-active .breadcrumb-filter-switch-thumb {
  left: 14px;
  background: var(--accent);
}

.breadcrumb-filter-switch.is-active .breadcrumb-filter-switch-label {
  color: var(--text);
  font-weight: 700;
}

.breadcrumb-mode-button {
  min-height: 28px;
  padding: 4px 9px;
  border-radius: 0;
  font-size: 12px;
}

.breadcrumb-mode-button.is-first {
  border-radius: 6px 0 0 6px;
}

.breadcrumb-mode-button.is-last {
  margin-left: -1px;
  border-radius: 0 6px 6px 0;
}

.breadcrumb-mode-button.is-active {
  border-color: var(--accent);
  background: #e7f1f8;
  color: var(--text);
  font-weight: 700;
}

.breadcrumb-parent-button {
  min-height: 26px;
  width: 32px;
  padding: 0;
}

.breadcrumb-path {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb-path li {
  display: flex;
  align-items: center;
  min-width: 0;
}

.breadcrumb-path li + li::before {
  content: "/";
  color: var(--muted);
  padding: 0 4px 0 0;
}

.breadcrumb-link {
  min-height: 26px;
  max-width: 180px;
  padding: 3px 7px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-color: transparent;
}

.breadcrumb-link:disabled {
  color: var(--text);
  cursor: default;
  font-weight: 700;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 6px;
  background: var(--panel-alt);
}

.toolbar button {
  min-height: 28px;
  padding: 3px 9px;
}

.mode-toolbar {
  border-bottom: 1px solid var(--border);
  background: var(--panel-alt);
}

.mode-toolbar-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  padding: 5px 10px 0;
}

.mode-toolbar-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-width: 0;
  border-bottom: 1px solid var(--border);
}

.mode-toolbar-split .mode-toolbar {
  border-bottom: 0;
}

.mode-toolbar-split .mode-toolbar:first-child {
  border-right: 1px solid var(--border);
}

.canvas-panel {
  position: relative;
  min-height: 0;
  background: var(--canvas-bg);
}

.mode-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-width: 0;
  min-height: 0;
}

.mode-pane {
  display: grid;
  min-width: 0;
  min-height: 0;
  border-right: 1px solid var(--border);
}

.mode-pane:last-child {
  border-right: 0;
}

.module-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.canvas-status {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--muted);
  font-size: 12px;
}

.canvas-status.is-feature-status {
  max-width: min(320px, calc(100% - 24px));
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-color: #a8c6dc;
  background: #e7f1f8;
  color: var(--accent-strong);
  cursor: pointer;
  font-weight: 700;
}

.canvas-status.is-feature-status:hover,
.canvas-status.is-feature-status:focus {
  border-color: var(--accent);
  outline: 2px solid rgba(39, 108, 159, 0.16);
}

.app-context-menu {
  position: fixed;
  z-index: 20;
  display: grid;
  min-width: 170px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  box-shadow: 0 8px 22px rgba(20, 28, 32, 0.18);
}

.app-context-menu-item {
  min-height: 28px;
  justify-content: start;
  padding: 5px 8px;
  border-color: transparent;
  border-radius: 4px;
  text-align: left;
}

.app-context-menu-item:hover,
.app-context-menu-item:focus {
  border-color: transparent;
  background: var(--panel-alt);
}

.app-context-menu-item:disabled {
  color: #94a2a8;
  background: transparent;
  cursor: not-allowed;
}

.property-list {
  display: grid;
  gap: 12px;
  padding: 12px;
}

.property-row {
  display: grid;
  gap: 4px;
}

.property-section {
  display: grid;
  gap: 6px;
}

.property-label {
  color: var(--muted);
  font-size: 12px;
}

.property-value {
  min-height: 32px;
  padding: 7px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
}

.property-input {
  min-height: 32px;
  width: 100%;
  padding: 7px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
}

.property-input:focus {
  border-color: var(--accent);
  outline: 2px solid rgba(39, 108, 159, 0.16);
}

.property-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.property-chip-list {
  display: grid;
  gap: 6px;
}

.property-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 32px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
}

.property-action-button {
  min-height: 30px;
  padding: 5px 8px;
  font-size: 12px;
}

.empty-editor-panel {
  display: grid;
  place-items: center;
  min-height: 0;
  color: var(--muted);
  background: var(--canvas-bg);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(24, 32, 36, 0.42);
}

.modal-dialog {
  width: min(480px, 100%);
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 16px 40px rgba(20, 28, 32, 0.24);
}

.modal-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  margin: 0;
  font-size: 16px;
}

.modal-form {
  display: grid;
  gap: 16px;
  padding: 16px;
}

.modal-field {
  display: grid;
  gap: 6px;
}

.modal-fieldset {
  display: grid;
  gap: 8px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.modal-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.modal-input {
  width: 100%;
  min-height: 36px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
}

.modal-input:focus {
  border-color: var(--accent);
  outline: 2px solid rgba(39, 108, 159, 0.16);
}

.modal-error {
  min-height: 16px;
  color: #9b2f2f;
  font-size: 12px;
}

.mode-option {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: start;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.mode-option:has(input:checked) {
  border-color: #a8c6dc;
  background: #e7f1f8;
}

.mode-option input {
  margin: 2px 0 0;
}

.mode-option-body {
  display: grid;
  gap: 3px;
}

.mode-option-title {
  font-weight: 700;
}

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

.modal-actions {
  display: flex;
  justify-content: end;
  gap: 8px;
}

.status-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 0 12px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
}

.status-label {
  color: var(--text);
  font-weight: 700;
}

.status-message {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status-error {
  background: #fff4f2;
  color: #8a2d22;
}

.status-error .status-label {
  color: #8a2d22;
}

@media (max-width: 900px) {
  .editor-layout {
    grid-template-columns: 320px minmax(280px, 1fr);
  }

  .properties-panel {
    display: none;
  }

  .navigation-sidebar {
    grid-template-columns: 140px minmax(0, 1fr);
  }
}