:root {
  color-scheme: dark;
  --bg: #080a0e;
  --panel: #11151d;
  --panel-2: #151b25;
  --panel-3: #1a2230;
  --line: #263142;
  --line-bright: #3d4e68;
  --text: #e8eef6;
  --muted: #8e9bac;
  --accent: #4fc3ff;
  --accent-2: #b5f06e;
  --danger: #ff6b7a;
  --warn: #ffc857;
  --shadow: rgba(0, 0, 0, 0.36);
  --type-scalar: #56c7ff;
  --node-width: 188px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
}

button,
select,
input {
  font: inherit;
}

button,
select {
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #161c26;
  color: var(--text);
  padding: 0 10px;
}

.icon-btn {
  width: 32px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  font-size: 16px;
  line-height: 1;
}

.icon-btn.active {
  border-color: #275e7a;
  background: #123348;
}

button {
  cursor: pointer;
}

button:hover,
select:hover {
  border-color: var(--line-bright);
  background: #1d2634;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

.primary-btn {
  border-color: #275e7a;
  background: #123348;
}

.app-shell {
  display: grid;
  grid-template-rows: 44px minmax(0, 1fr) 184px;
  height: 100%;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-bottom: 1px solid var(--line);
  background: #0c1016;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 190px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-mark {
  width: 18px;
  height: 18px;
  display: block;
  object-fit: contain;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.mobile-menu-btn,
.mobile-edit-panel {
  display: none;
}

.mobile-edit-toggle {
  width: 100%;
  height: 40px;
  border: 0;
  border-radius: 0;
  background: linear-gradient(90deg, #123348, #182436);
  color: var(--text);
  font-weight: 800;
}

.toolbar-spacer {
  flex: 1;
}

.random-control {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  color: var(--muted);
  font-size: 12px;
}

.random-control-label {
  color: var(--muted);
  font-weight: 700;
}

.random-control input {
  width: 82px;
}

.global-speed-control input {
  width: 94px;
}

.random-control > span:last-child {
  min-width: 18px;
  text-align: right;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.workspace {
  --preview-col: minmax(430px, 1.22fr);
  --graph-col: minmax(440px, 0.98fr);
  --inspector-col: 306px;
  width: 100%;
  min-height: 0;
  display: grid;
  grid-template-columns: var(--preview-col) 8px var(--graph-col) 8px var(--inspector-col);
  gap: 0;
  padding: 8px;
  overflow: hidden;
}

.pane-resizer {
  position: relative;
  cursor: col-resize;
  touch-action: none;
}

.pane-resizer::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 3px;
  width: 2px;
  border-radius: 999px;
  background: rgba(61, 78, 104, 0.55);
}

.pane-resizer:hover::before,
.pane-resizer.dragging::before {
  background: var(--accent);
}

.panel {
  min-width: 0;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 12px 28px var(--shadow);
  overflow: hidden;
}

.panel-header {
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0 10px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
  font-weight: 700;
}

.panel-header-actions {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
}

.graph-header-actions {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
}

.graph-mobile-action {
  display: none;
}

.panel-icon-btn {
  width: 26px;
  height: 24px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border-radius: 5px;
  font-size: 14px;
  line-height: 1;
}

.panel-meta {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-panel {
  display: grid;
  grid-template-rows: 34px minmax(0, 1fr);
}

.preview-panel:fullscreen {
  width: 100vw;
  height: 100vh;
  border: 0;
  border-radius: 0;
  grid-template-rows: minmax(0, 1fr);
}

.preview-panel:fullscreen > .panel-header {
  display: none;
}

.preview-wrap {
  position: relative;
  min-height: 0;
  overflow: hidden;
  background: #05070a;
}

#previewCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}

#previewCanvas:active {
  cursor: grabbing;
}

.graph-panel {
  display: grid;
  grid-template-rows: 34px minmax(0, 1fr);
}

.graph-viewport {
  position: relative;
  min-height: 0;
  overflow: auto;
  cursor: grab;
  touch-action: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    #0a0d13;
  background-size: 32px 32px;
}

.graph-viewport.panning {
  cursor: grabbing;
}

.graph-surface {
  position: relative;
  width: 2800px;
  height: 4200px;
}

.wire-layer,
.node-layer {
  position: absolute;
  inset: 0;
  width: 2800px;
  height: 4200px;
  transform-origin: 0 0;
}

.wire-layer {
  pointer-events: auto;
  overflow: visible;
}

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

.wire-path {
  fill: none;
  stroke: var(--wire-color, #53657e);
  stroke-width: 3;
  pointer-events: none;
}

.wire-path.type-scalar,
.wire-hit.type-scalar,
.wire-temp.type-scalar {
  --wire-color: var(--type-scalar);
}

.wire-hit {
  fill: none;
  stroke: rgba(255, 255, 255, 0.001);
  stroke-width: 18;
  pointer-events: stroke;
  cursor: pointer;
}

.wire-hit:hover + .wire-path {
  stroke: color-mix(in srgb, var(--wire-color, var(--accent)) 72%, white);
  stroke-width: 4;
}

.wire-temp {
  fill: none;
  stroke: var(--wire-color, var(--accent));
  stroke-dasharray: 6 5;
  stroke-width: 2;
  pointer-events: none;
}

.node-card {
  position: absolute;
  width: var(--node-width);
  --node-accent: #53657e;
  border: 1px solid #2c3748;
  border-left: 4px solid var(--node-accent);
  border-radius: 8px;
  background: #121923;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.32);
  cursor: default;
  pointer-events: auto;
  user-select: none;
}

.node-card.category-input {
  --node-accent: #d48cff;
}

.node-card.category-field {
  --node-accent: #4fc3ff;
}

.node-card.category-domain {
  --node-accent: #b5f06e;
}

.node-card.category-math {
  --node-accent: #ffc857;
}

.node-card.category-coloring {
  --node-accent: #ff8a5b;
}

.node-card.category-output {
  --node-accent: #f36bff;
}

.node-card.selected {
  border-color: var(--accent);
  border-left-color: var(--node-accent);
  box-shadow: 0 0 0 1px rgba(79, 195, 255, 0.45), 0 14px 26px rgba(0, 0, 0, 0.36);
}

.node-header {
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0 9px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, color-mix(in srgb, var(--node-accent) 22%, #182130), #182130 55%);
  border-radius: 7px 7px 0 0;
  cursor: grab;
  font-weight: 700;
  font-size: 12px;
}

.node-header:active {
  cursor: grabbing;
}

.node-category {
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
}

.node-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 7px 0;
}

.port-row {
  position: relative;
  min-height: 24px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: #cad5e3;
  font-size: 11px;
}

.port-row span:last-child {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.port-row.input {
  justify-content: flex-start;
  padding-left: 13px;
}

.port-row.output {
  justify-content: flex-end;
  padding-right: 13px;
  text-align: right;
}

.port-dot {
  position: relative;
  width: 10px;
  height: 10px;
  --port-color: #71839c;
  border: 1px solid var(--port-color);
  border-radius: 50%;
  background: #0b0f16;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--port-color) 24%, transparent);
  cursor: crosshair;
}

.port-dot::before {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
}

.port-dot[data-type="scalar"] {
  --port-color: var(--type-scalar);
}

.port-dot:hover {
  transform: scale(1.2);
  background: var(--port-color);
  box-shadow: 0 0 12px color-mix(in srgb, var(--port-color) 60%, transparent);
}

.inspector-panel {
  display: grid;
  grid-template-rows: 34px minmax(0, 1fr);
}

.inspector {
  overflow: auto;
  padding: 12px;
}

.empty-state {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

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

.field-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: #dbe6f3;
  font-size: 12px;
  font-weight: 700;
}

.field-label span:last-child {
  color: var(--muted);
  font-weight: 500;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 76px;
  gap: 8px;
  align-items: center;
}

.field-row input[type="range"] {
  width: 100%;
}

.field-row input[type="number"],
.field-row input[type="text"],
.field-row select {
  width: 100%;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0d121a;
  color: var(--text);
  padding: 0 8px;
}

.field-row input[type="color"] {
  width: 100%;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0d121a;
  padding: 2px;
}

.small-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.history-panel {
  display: grid;
  grid-template-rows: 28px minmax(0, 1fr);
  border-top: 1px solid var(--line);
  background: #0c1016;
  min-height: 0;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  color: var(--muted);
  font-size: 12px;
}

.history-strip {
  display: flex;
  align-items: stretch;
  gap: 8px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-color: var(--line-bright) transparent;
  padding: 8px 10px 10px;
  min-height: 0;
  height: 100%;
}

.history-item {
  flex: 0 0 148px;
  height: 100%;
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr) 24px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #111720;
  color: var(--muted);
  cursor: pointer;
  overflow: hidden;
  padding: 0;
}

.history-item.active {
  border-color: var(--accent);
}

.history-thumb {
  width: 100%;
  height: 100%;
  min-height: 0;
  background: #070a0f;
  object-fit: cover;
  display: block;
}

.history-label {
  padding: 5px 7px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11px;
}

.modal-root {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.58);
}

.modal-root[hidden] {
  display: none !important;
  pointer-events: none;
}

.modal-card {
  width: min(860px, calc(100vw - 36px));
  max-height: calc(100vh - 48px);
  display: grid;
  grid-template-rows: 42px minmax(0, 1fr);
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.56);
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
  font-weight: 700;
}

.modal-body {
  overflow: auto;
  padding: 14px;
}

.modal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(184px, 1fr));
  gap: 10px;
}

.preset-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101620;
  overflow: hidden;
}

.preset-card img {
  width: 100%;
  height: 92px;
  display: block;
  background: #070a0f;
  object-fit: cover;
}

.preset-card-body {
  display: grid;
  gap: 7px;
  padding: 8px;
}

.preset-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 700;
  font-size: 12px;
}

.modal-actions,
.preset-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.help-content {
  display: grid;
  gap: 14px;
  color: #d8e3ef;
  font-size: 13px;
  line-height: 1.45;
}

.help-content h3 {
  margin: 0 0 5px;
  font-size: 13px;
}

.help-content p {
  margin: 0;
  color: var(--muted);
}

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

.mobile-control-menu {
  display: grid;
  gap: 14px;
}

.mobile-menu-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.mobile-menu-actions button {
  min-height: 40px;
}

.mobile-menu-sliders {
  display: grid;
  gap: 12px;
}

.mobile-menu-range {
  display: grid;
  gap: 8px;
}

.mobile-menu-range input {
  width: 100%;
}

.export-modal {
  display: grid;
  gap: 12px;
}

.export-tabs {
  display: flex;
  gap: 6px;
}

.export-tabs button.active {
  border-color: #275e7a;
  background: #123348;
}

.export-pane {
  display: grid;
  gap: 12px;
}

.export-form {
  gap: 10px;
}

.export-field {
  display: grid;
  gap: 5px;
  color: #dbe6f3;
  font-size: 12px;
  font-weight: 700;
}

.export-field input {
  width: 100%;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0d121a;
  color: var(--text);
  padding: 0 8px;
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #dbe6f3;
  font-size: 12px;
  font-weight: 700;
}

.node-palette {
  display: grid;
  gap: 12px;
}

.node-palette-search {
  height: 34px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0d121a;
  color: var(--text);
  padding: 0 10px;
}

.node-palette-category {
  display: grid;
  gap: 7px;
}

.node-palette-title {
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.node-palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 7px;
}

.node-palette-button {
  --node-accent: #53657e;
  justify-content: flex-start;
  height: 34px;
  text-align: left;
  border-left: 4px solid var(--node-accent);
  background: linear-gradient(90deg, color-mix(in srgb, var(--node-accent) 20%, #161c26), #161c26 55%);
}

.node-palette-button.category-input {
  --node-accent: #d48cff;
}

.node-palette-button.category-field {
  --node-accent: #4fc3ff;
}

.node-palette-button.category-domain {
  --node-accent: #b5f06e;
}

.node-palette-button.category-math {
  --node-accent: #ffc857;
}

.node-palette-button.category-coloring {
  --node-accent: #ff8a5b;
}

.settings-row {
  display: grid;
  grid-template-columns: 1fr 160px 110px;
  gap: 8px;
  align-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #101620;
}

.kbd {
  border: 1px solid var(--line-bright);
  border-radius: 5px;
  background: #0c1119;
  padding: 5px 8px;
  color: #d8e3ef;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

@media (max-width: 1180px) {
  .workspace {
    --preview-col: minmax(330px, 1fr);
    --graph-col: minmax(330px, 1fr);
    --inspector-col: 280px;
  }
}

@media (max-width: 900px) {
  input,
  textarea,
  select {
    font-size: 16px;
  }

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

  .app-shell {
    height: 100dvh;
    min-height: 0;
    grid-template-rows: max-content minmax(0, 1fr) 116px;
    overflow: hidden;
  }

  .topbar {
    z-index: 10;
    flex-wrap: nowrap;
    gap: 6px;
    padding: 7px 8px;
    overflow: visible;
  }

  .brand {
    min-width: 0;
    flex: 1 1 auto;
    font-size: 14px;
  }

  .toolbar-spacer {
    display: none;
  }

  .toolbar-group {
    flex: 0 0 auto;
    flex-wrap: nowrap;
  }

  .toolbar-group button,
  .icon-btn {
    min-width: 38px;
    height: 36px;
  }

  .secondary-toolbar,
  .random-control {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    height: 36px;
    padding: 0 12px;
    font-weight: 800;
  }

  .workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(0, 36fr) auto minmax(0, 40fr) minmax(0, 24fr);
    gap: 8px;
    padding: 8px;
    overflow: hidden;
  }

  .workspace.mobile-edit-collapsed {
    grid-template-rows: minmax(0, 1fr) auto;
  }

  .workspace.mobile-edit-collapsed .graph-panel,
  .workspace.mobile-edit-collapsed .inspector-panel {
    display: none;
  }

  .mobile-edit-panel {
    display: block;
    min-height: 0;
  }

  .pane-resizer {
    display: none;
  }

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

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

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

  .panel {
    box-shadow: none;
  }

  .panel-header {
    min-height: 38px;
    height: auto;
    padding: 6px 9px;
  }

  .panel-meta {
    max-width: 46vw;
  }

  .graph-header-actions {
    flex: 1 1 auto;
  }

  .graph-mobile-action {
    display: inline-grid;
    flex: 0 0 auto;
    font-size: 18px;
    font-weight: 800;
  }

  .panel-icon-btn {
    width: 34px;
    height: 30px;
  }

  .graph-viewport,
  .inspector,
  .modal-body,
  .history-strip {
    -webkit-overflow-scrolling: touch;
  }

  .node-card {
    touch-action: none;
  }

  .node-header {
    min-height: 38px;
    height: auto;
    padding-top: 4px;
    padding-bottom: 4px;
  }

  .port-row {
    min-height: 30px;
  }

  .port-dot {
    width: 14px;
    height: 14px;
  }

  .port-dot::before {
    inset: -12px;
  }

  .field-row {
    grid-template-columns: minmax(0, 1fr) 88px;
  }

  .field-row input[type="number"],
  .field-row input[type="text"],
  .field-row select,
  .field-row input[type="color"],
  .export-field input {
    height: 38px;
  }

  .small-actions button,
  .modal-actions button,
  .preset-actions button {
    min-height: 36px;
  }

  .history-panel {
    z-index: 9;
  }

  .history-item {
    flex-basis: 124px;
  }

  .modal-root {
    align-items: end;
    padding: 8px;
  }

  .modal-card {
    width: 100%;
    max-height: calc(100dvh - 16px);
  }

  .modal-head {
    min-height: 46px;
  }

  .modal-grid,
  .node-palette-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 520px) {
  .app-shell {
    grid-template-rows: 50px minmax(0, 1fr) 86px;
  }

  .topbar {
    min-height: 0;
    gap: 5px;
    overflow: visible;
  }

  .brand {
    flex: 0 0 28px;
    gap: 0;
  }

  .brand span:last-child {
    display: none;
  }

  .toolbar-group {
    flex: 0 0 auto;
  }

  .toolbar-group button,
  .icon-btn {
    min-width: 34px;
    width: 34px;
    height: 34px;
  }

  .mobile-menu-btn {
    height: 34px;
    padding: 0 9px;
  }

  .workspace {
    gap: 6px;
    padding: 6px;
  }

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

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

  .inspector {
    padding: 10px;
  }

  .field-label {
    align-items: flex-start;
    flex-direction: column;
    gap: 3px;
  }

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

  .history-item {
    flex-basis: 112px;
  }
}