:root {
  --ink: #282a30;
  --muted: #858a94;
  --line: #e4e6eb;
  --paper: #fff;
  --surface: #f5f6f8;
  --accent: #5674bd;
  --accent-light: #edf1fa;
  --radius: 8px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 13px;
  color: var(--ink);
  background: var(--paper);
}
* {
  box-sizing: border-box;
}
body,
html,
#app {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}
button {
  cursor: pointer;
}
button:disabled {
  cursor: default;
  opacity: 0.35;
}
button,
input,
select,
textarea {
  outline: none;
}
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid #839acc;
  outline-offset: 2px;
}
button {
  border: 0;
  background: transparent;
}
input,
select,
textarea {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fff;
}
input:not([type='checkbox']):not([type='range']),
select {
  height: 32px;
  padding: 5px 9px;
  width: 100%;
}
input[type='range'] {
  accent-color: var(--accent);
  width: 100%;
  margin: 10px 0 3px;
}
input[type='checkbox'] {
  accent-color: var(--accent);
}
textarea {
  resize: none;
  padding: 12px;
}
svg {
  display: block;
}
.icon {
  flex-shrink: 0;
}
.editor-app {
  height: 100%;
  display: flex;
  flex-direction: column;
}
.app-header {
  height: 68px;
  display: flex;
  align-items: center;
  gap: 30px;
  padding: 0 23px;
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 245px;
  flex-shrink: 0;
}
.brand > img {
  width: 36px;
  height: 36px;
}
.brand > span:first-of-type {
  font-family: Georgia, serif;
  font-size: 19px;
  letter-spacing: -0.4px;
}
.document-title {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 100px;
}
.document-title input {
  border-color: transparent !important;
  background: transparent;
  font-size: 14px;
  font-weight: 500;
  max-width: 220px;
}
.document-title input:hover {
  border-color: var(--line) !important;
}
.save-indicator {
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}
.save-indicator i {
  display: inline-block;
  width: 5px;
  height: 5px;
  background: #71a287;
  border-radius: 50%;
  margin-right: 5px;
}
.header-actions,
.button-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 12px;
  border-radius: 5px;
  white-space: nowrap;
  font-size: 12px;
  min-height: 34px;
}
.primary-button {
  background: #303239;
  color: white;
}
.primary-button:hover {
  background: #464955;
}
.secondary-button {
  border: 1px solid var(--line);
  background: #fff;
}
.secondary-button:hover {
  background: var(--surface);
}
.full-width {
  width: 100%;
}
.icon-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  color: var(--muted);
}
.icon-button:hover {
  background: var(--surface);
  color: var(--ink);
}
.global-toolbar {
  display: flex;
  align-items: center;
  background: #25272c;
  color: #e7e8ec;
  min-height: 50px;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
}
.toolbar-section {
  display: flex;
  align-items: center;
  gap: 3px;
  border-right: 1px solid #494b51;
  padding-right: 12px;
}
.toolbar-section:last-child {
  border: 0;
}
.toolbar-end {
  margin-left: auto;
}
.tool-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border-radius: 5px;
  padding: 9px;
  color: inherit;
  position: relative;
  white-space: nowrap;
  font-size: 11px;
}
.tool-button:hover:not(:disabled) {
  background: #ffffff12;
}
.tool-button.active {
  background: #ffffff20;
  color: white;
}
.tool-button kbd {
  font-size: 10px;
  opacity: 0.55;
  margin-left: 3px;
  font-family: inherit;
}
.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 260px minmax(240px, 1fr) 250px;
  min-height: 0;
  background: #f8f9fb;
  padding: 12px;
  gap: 12px;
}
.panel {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 0;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 6px #25272c03;
}
.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 14px;
  min-height: 49px;
  border-bottom: 1px solid #edeef2;
  font-weight: 600;
  font-size: 12px;
}
.panel-heading > span:first-child {
  display: flex;
  align-items: center;
  gap: 6px;
}
.panel-tabs {
  display: flex;
  border-bottom: 1px solid var(--line);
  padding: 0 11px;
}
.panel-tabs button {
  flex: 1;
  position: relative;
  padding: 13px 0;
  color: var(--muted);
  font-size: 11px;
}
.panel-tabs button.active {
  color: var(--ink);
}
.panel-tabs button.active:after {
  position: absolute;
  content: '';
  height: 2px;
  left: 12px;
  right: 12px;
  bottom: 0;
  background: var(--ink);
}
.panel-tabs span {
  font-size: 9px;
  opacity: 0.55;
  margin-left: 3px;
}
.panel-scroll {
  padding: 0 13px 16px;
  overflow-y: auto;
  flex: 1;
  scrollbar-width: thin;
}
.section-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 20px 0 10px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: #717783;
}
.section-label > span {
  font-size: 9px;
  font-weight: 400;
  color: #a4a8b1;
  letter-spacing: 0;
}
.propagator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.propagator-card {
  border: 1px solid var(--line);
  border-radius: 5px;
  text-align: left;
  padding: 7px 9px;
  background: white;
  transition: border-color 0.12s;
}
.propagator-card:hover {
  border-color: #aab5cc;
  background: #fafbfe;
}
.propagator-card.selected {
  border-color: #7e95c5;
  background: #f1f4fa;
}
.line-preview {
  width: 100%;
  height: 28px;
  margin: 0 0 4px;
}
.propagator-card > span {
  display: block;
  font-size: 10px;
  font-weight: 500;
  white-space: nowrap;
}
.propagator-card > small {
  display: block;
  font-size: 9px;
  color: var(--muted);
  margin-top: 3px;
}
.vertex-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.vertex-grid button {
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 5px;
  font-size: 9px;
}
.vertex-grid button.selected {
  border-color: #7e95c5;
  background: #f1f4fa;
}
.vertex-grid svg {
  height: 31px;
  width: 100%;
  margin-bottom: 3px;
}
.library-tip {
  display: flex;
  gap: 9px;
  background: #f7f8fa;
  padding: 10px;
  border-radius: 5px;
  color: #8a909a;
  margin-top: 18px;
  font-size: 10px;
  line-height: 1.65;
}
.library-tip p {
  margin: 0;
}
.search-input {
  margin-top: 14px;
}
.template-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-top: 14px;
}
.template-card {
  display: grid;
  grid-template-columns: 80px 1fr;
  position: relative;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 11px 8px;
  gap: 8px;
  background: #fff;
  min-height: 87px;
}
.template-card:hover {
  border-color: #8097c7;
  background: #f9fbff;
}
.template-preview {
  width: 80px;
  height: 62px;
}
.template-info {
  align-self: center;
}
.template-info b {
  display: block;
  font-weight: 500;
  font-size: 11px;
  margin-bottom: 5px;
}
.template-info small {
  font-size: 9px;
  line-height: 1.5;
  color: var(--muted);
  display: block;
}
.template-category {
  position: absolute;
  right: 6px;
  top: 5px;
  font-size: 8px;
  color: #a2a7b1;
}
.fine-print {
  font-size: 10px;
  color: var(--muted);
  line-height: 1.8;
  margin-top: 15px;
}
.canvas-region {
  min-width: 0;
  min-height: 0;
  position: relative;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.canvas-host {
  width: 100%;
  height: 100%;
  touch-action: none;
  user-select: none;
}
.tool-edge,
.tool-node,
.tool-text {
  cursor: crosshair;
}
.tool-pan {
  cursor: grab;
}
.tool-pan:active {
  cursor: grabbing;
}
.diagram-edge {
  cursor: pointer;
}
.hit-target {
  pointer-events: all;
}
.tool-edge .hit-target {
  cursor: crosshair;
}
.canvas-caption {
  position: absolute;
  z-index: 2;
  top: 18px;
  left: 20px;
  pointer-events: none;
  padding: 5px 8px;
  background: #ffffffdc;
  border-radius: 4px;
}
.canvas-caption span {
  display: block;
  font-size: 11px;
  color: #565c67;
}
.canvas-caption small {
  display: block;
  font-size: 9px;
  color: #a0a5af;
  margin-top: 5px;
}
.canvas-toolbar {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 2px;
  background: #292b30;
  color: #c6c9d0;
  padding: 5px;
  border-radius: 7px;
  box-shadow: 0 4px 15px #20232a22;
}
.canvas-toolbar .tool-button {
  flex-direction: column;
  font-size: 9px;
  gap: 4px;
  padding: 7px 13px;
  min-width: 43px;
}
.canvas-toolbar .tool-button kbd {
  display: none;
}
.canvas-toolbar .tool-button.active {
  color: white;
  background: #515761;
}
.zoom-controls {
  position: absolute;
  bottom: 22px;
  right: 15px;
  display: flex;
  align-items: center;
  background: #fffffff0;
  border: 1px solid var(--line);
  border-radius: 5px;
  height: 31px;
  box-shadow: 0 2px 5px #00000006;
}
.zoom-controls button {
  padding: 7px 8px;
  color: #6f7683;
  font-size: 10px;
}
.zoom-controls button:hover {
  background: var(--surface);
}
.zoom-number {
  min-width: 43px;
}
.empty-canvas-message {
  position: absolute;
  top: 43%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  width: 90%;
  color: #9da3ad;
}
.empty-canvas-message > span {
  font-family: Georgia, serif;
  font-size: 21px;
  color: #858c97;
}
.empty-canvas-message p {
  font-size: 11px;
  line-height: 1.8;
}
.library-collapsed {
  grid-template-columns: 36px minmax(240px, 1fr) 250px;
}
.library-toggle {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: white;
  display: flex;
  justify-content: center;
  align-items: center;
}
.selection-count {
  font-size: 9px !important;
  font-weight: 400;
  color: #8b96a8;
}
.field {
  display: block;
  margin-top: 15px;
}
.field-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  color: #6e7480;
  margin-bottom: 7px;
}
.field-label small {
  color: #a4a9b2;
  font-size: 9px;
}
.field input,
.field select {
  font-size: 11px;
}
.segmented {
  display: flex;
  gap: 2px;
  padding: 3px;
  border-radius: 5px;
  border: 1px solid var(--line);
  background: #f7f8fa;
}
.segmented button {
  padding: 5px;
  flex: 1;
  color: #8a9099;
  font-size: 10px;
  border-radius: 3px;
}
.segmented button.active {
  background: white;
  box-shadow: 0 1px 3px #26293212;
  color: var(--ink);
}
.range-labels {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 9px;
  color: #a2a8b2;
}
.range-labels button {
  font-size: 9px;
  color: #8f9cb5;
}
.check-field {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: #7a818d;
  line-height: 1.7;
  margin-top: 12px;
}
.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px;
}
.color-swatches {
  display: flex;
  gap: 8px;
  padding: 3px;
}
.color-swatches button {
  width: 19px;
  height: 19px;
  border-radius: 50%;
  border: 2px solid white;
  outline: 1px solid transparent;
}
.color-swatches button.active {
  outline-color: #a4acbb;
}
.inspector-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin-top: 21px;
}
.inspector-actions button {
  font-size: 10px;
  padding: 7px 8px;
  min-height: 30px;
}
.danger {
  color: #ad5557;
}
.selected-propagator {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 16px 0 0;
}
.selected-propagator .line-preview {
  width: 72px;
  margin: 0;
}
.selected-propagator > span {
  font-size: 10px;
  color: #747b86;
}
.inspector-placeholder {
  padding: 35px 21px;
  color: #a4aab5;
  line-height: 1.8;
}
.inspector-placeholder h3 {
  font-size: 12px;
  font-weight: 500;
  color: #686f7c;
  margin-top: 19px;
}
.inspector-placeholder p {
  font-size: 10px;
}
.shortcut-hints {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 28px;
  font-size: 10px;
}
.shortcut-hints > span {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.shortcut-hints kbd,
.help-grid kbd {
  font-family: inherit;
  font-size: 9px;
  background: #f5f6f8;
  padding: 3px 5px;
  border-radius: 4px;
  color: #8b929d;
}
.app-status {
  height: 27px;
  padding: 0 21px;
  background: white;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 9px;
  color: #9ba1ac;
  flex-shrink: 0;
}
.app-status i {
  display: inline-block;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: #b3b9c3;
  margin: 0 8px;
  vertical-align: middle;
}
.toast {
  position: fixed;
  bottom: 49px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 9px;
  background: #30343d;
  color: white;
  border: 1px solid #525762;
  border-radius: 7px;
  padding: 12px 17px;
  box-shadow: 0 6px 25px #0002;
  z-index: 100;
  font-size: 12px;
}
.toast.error {
  background: #884c52;
}
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: #25293238;
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 25px;
}
.export-panel,
.import-panel,
.help-panel,
.confirm-panel {
  background: white;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 20px 80px #1d223334;
  max-width: 100%;
  max-height: 90vh;
  overflow: auto;
  padding: 26px;
  width: 690px;
}
.import-panel {
  width: 570px;
}
.help-panel {
  width: 600px;
}
.confirm-panel {
  width: 430px;
}
.modal-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 22px;
  gap: 15px;
}
h2 {
  font-size: 19px;
  font-weight: 550;
  letter-spacing: -0.4px;
  margin: 0 0 8px;
}
.modal-heading p,
.confirm-panel p {
  margin: 0;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.8;
}
.export-tabs {
  display: flex;
  gap: 3px;
  padding: 4px;
  background: #f1f3f6;
  border-radius: 6px;
  margin-bottom: 16px;
}
.export-tabs button {
  flex: 1;
  padding: 9px;
  font-size: 11px;
  color: #818894;
  border-radius: 4px;
}
.export-tabs button.active {
  background: white;
  color: var(--ink);
  box-shadow: 0 1px 4px #0001;
}
.code-editor {
  width: 100%;
  height: 310px;
  font:
    11px/1.8 ui-monospace,
    SFMono-Regular,
    Menlo,
    monospace;
  white-space: pre;
  overflow: auto;
  border: 1px solid var(--line);
  background: #fafbfc;
  color: #4f596b;
  user-select: text;
}
.export-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 16px;
}
.export-footer > div:first-child {
  max-width: 55%;
  font-size: 10px;
  color: var(--muted);
  line-height: 1.7;
}
.export-footer .check-field {
  margin: 0;
}
.export-note {
  font-size: 9px;
  color: #a0a7b2;
  margin-bottom: 0;
  line-height: 1.6;
}
.svg-export-info {
  height: 310px;
  background: #fafbfc;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 42px;
  text-align: center;
  color: #7d889b;
  display: flex;
  align-items: center;
  flex-direction: column;
}
.svg-export-info h3 {
  font-size: 16px;
  color: #586171;
  font-weight: 500;
}
.svg-export-info p {
  font-size: 12px;
  line-height: 1.8;
  max-width: 380px;
}
.justify-end {
  justify-content: flex-end;
  margin-top: 20px;
}
.import-panel .code-editor {
  height: 240px;
  margin-top: 16px;
}
.help-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 26px;
  font-size: 10px;
}
.help-grid > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: #717986;
}
.startup-message {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: #8a929f;
}
@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 225px minmax(220px, 1fr) 220px;
    gap: 8px;
    padding: 8px;
  }
  .library-collapsed {
    grid-template-columns: 32px minmax(220px, 1fr) 220px;
  }
  .brand {
    width: 205px;
  }
  .app-header {
    gap: 15px;
    padding: 0 16px;
  }
  .save-indicator {
    display: none;
  }
  .tool-button kbd {
    display: none;
  }
  .global-toolbar {
    gap: 7px;
    padding: 0 9px;
  }
  .toolbar-section {
    padding-right: 8px;
  }
  .global-toolbar .tool-button {
    padding: 9px 7px;
    font-size: 10px;
  }
  .canvas-toolbar .tool-button {
    padding: 7px 9px;
  }
  .zoom-controls {
    bottom: 84px;
    right: 12px;
  }
  .propagator-card {
    padding: 6px;
  }
  .propagator-card > span {
    font-size: 9px;
  }
  .propagator-card > small {
    font-size: 8px;
  }
}
@media (max-width: 800px) {
  .workspace {
    grid-template-columns: 185px minmax(150px, 1fr);
  }
  .inspector-panel {
    position: absolute;
    right: 14px;
    top: 135px;
    width: 215px;
    max-height: calc(100vh - 170px);
    z-index: 5;
    box-shadow: 0 4px 20px #0001;
  }
  .empty-inspector {
    display: none;
  }
  .library-collapsed {
    grid-template-columns: 32px minmax(150px, 1fr);
  }
  .panel-scroll {
    padding-left: 9px;
    padding-right: 9px;
  }
  .global-toolbar .tool-button > span {
    display: none;
  }
  .brand {
    width: auto;
  }
  .brand > span:first-of-type {
    font-size: 17px;
  }
  .document-title input {
    max-width: 140px;
  }
  .canvas-caption small {
    display: none;
  }
  .header-actions .secondary-button:not(.language-toggle) {
    display: none;
  }
  .help-grid {
    grid-template-columns: 1fr;
  }
  .export-footer {
    align-items: flex-start;
  }
  .propagator-grid {
    gap: 4px;
  }
  .propagator-card > small {
    display: none;
  }
}

.language-toggle {
  gap: 7px;
  white-space: nowrap;
  color: var(--muted);
}
.language-toggle .active {
  color: var(--ink);
  font-weight: 650;
}
.crossing-setting {
  margin: 10px 0;
  font-size: 11px;
  color: var(--muted);
}
.segmented.arrow-directions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.percentage-control {
  display: flex;
  align-items: center;
  gap: 5px;
}
.percentage-control input[type='range'] {
  flex: 1;
  min-width: 0;
}
.percentage-control input[type='number'] {
  width: 57px;
}
.percentage-control > span {
  font-size: 11px;
  color: var(--muted);
}
.crossing-setting .segmented {
  margin-top: 6px;
}
.attachment-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 11px;
  color: var(--accent);
  padding: 10px 0;
}
.attachment-status button {
  background: transparent;
  border: 0;
  color: inherit;
  text-decoration: underline;
}
.inspector-panel .button-row {
  flex-wrap: wrap;
}
.inspector-panel .button-row .secondary-button {
  font-size: 11px;
  padding: 7px 9px;
}