/* Central chart system: shared by SVG charts, React Flow previews, and future graph canvases. */
.chart-system {
  --chart-canvas:#f4f4f6;
  --chart-lane:#fbfbfc;
  --chart-line:#dedee2;
  --chart-node:#fff;
  --chart-node-line:#d8d8dd;
  --chart-ink:#1d1d1f;
  --chart-muted:#6e6e73;
  --chart-route:var(--story-accent,#ff6b1a);
  --chart-route-soft:#c8c7cc;
  --chart-boundary:#8e8e93;
  --chart-hub:#242426;
  --chart-machine:#fff5ed;
  --chart-machine-line:#f2c7aa;
  --chart-external:#f7f7f8;
  --chart-radius:10px;
  --chart-node-radius:6px;
  --chart-font:-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  overflow:hidden;
  border:1px solid var(--chart-line);
  border-radius:var(--chart-radius);
  background:var(--chart-canvas);
  box-shadow:0 2px 8px rgb(29 29 31 / 4%),0 18px 48px rgb(29 29 31 / 6%);
  color:var(--chart-ink);
  font-family:var(--chart-font);
}

.chart-head {
  display:block;
  min-height:104px;
  padding:18px 20px;
  border-bottom:1px solid var(--chart-line);
  background:rgb(255 255 255 / 88%);
}

.chart-eyebrow {
  display:inline-flex;
  align-items:center;
  gap:7px;
  margin-bottom:5px;
  color:var(--chart-muted);
  font-size:11px;
  line-height:1.4;
}

.chart-eyebrow::before {
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--chart-route);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--chart-route) 14%,transparent);
}

.chart-title {
  margin:0;
  color:var(--chart-ink);
  font-size:20px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:0;
}

.chart-summary {
  max-width:62ch;
  margin:5px 0 0;
  color:var(--chart-muted);
  font-size:13px;
  line-height:1.5;
}

.chart-canvas,
.chart-flow-shell {
  position:relative;
  overflow-x:auto;
  overflow-y:hidden;
  background-color:var(--chart-canvas);
  background-image:radial-gradient(circle,rgb(29 29 31 / 6%) 1px,transparent 1px);
  background-size:16px 16px;
  scrollbar-width:thin;
  scrollbar-color:var(--chart-line) transparent;
}

.chart-canvas:focus-visible {
  outline:3px solid var(--chart-route);
  outline-offset:-3px;
}

.chart-stage {
  width:100%;
  min-width:760px;
}

.chart-svg {
  display:block;
  width:100%;
  height:auto;
}

.chart-zone {
  fill:var(--chart-lane);
  stroke:var(--chart-line);
  stroke-width:1;
}

.chart-zone-label {
  fill:var(--chart-ink);
  font-size:13px;
  font-weight:600;
  letter-spacing:0;
}

.chart-zone-meta {
  fill:var(--chart-muted);
  font-size:10px;
  letter-spacing:0;
}

.chart-edge {
  fill:none;
  stroke:var(--chart-route);
  stroke-width:1.8;
  stroke-linecap:round;
  transition:opacity 180ms ease,stroke 180ms ease,stroke-width 180ms ease;
}

.chart-edge[data-kind="boundary"],
.chart-edge[data-kind="cloud"],
.chart-edge[data-kind="external"] {
  stroke:var(--chart-boundary);
  stroke-dasharray:5 5;
}

.chart-edge-label {
  fill:var(--chart-muted);
  font-size:9px;
  font-weight:500;
  letter-spacing:0;
  paint-order:stroke;
  stroke:var(--chart-canvas);
  stroke-width:4px;
}

.chart-node {
  cursor:default;
  transition:opacity 180ms ease,stroke 180ms ease,stroke-width 180ms ease;
}

.chart-node:focus {
  outline:none;
}

.chart-node-card {
  fill:var(--chart-node);
  stroke:var(--chart-node-line);
  stroke-width:1.2;
  filter:drop-shadow(0 3px 4px rgb(29 29 31 / 8%));
  transition:stroke 180ms ease,stroke-width 180ms ease;
}

.chart-node:hover > .chart-node-card,
.chart-node:focus > .chart-node-card {
  stroke:var(--chart-route);
  stroke-width:2;
}

.chart-node[data-kind="hub"] > .chart-node-card {
  fill:var(--chart-hub);
  stroke:var(--chart-hub);
}

.chart-node[data-kind="machine"] > .chart-node-card {
  fill:var(--chart-machine);
  stroke:var(--chart-machine-line);
}

.chart-node[data-kind="external"] > .chart-node-card {
  fill:var(--chart-external);
  stroke:#aaa9ae;
  stroke-dasharray:5 4;
}

.chart-node-kicker {
  fill:var(--chart-muted);
  font-size:9px;
  font-weight:500;
  letter-spacing:0;
}

.chart-node-title {
  fill:var(--chart-ink);
  font-size:14px;
  font-weight:600;
  letter-spacing:0;
}

.chart-node-meta {
  fill:var(--chart-muted);
  font-size:10px;
  letter-spacing:0;
}

.chart-node[data-kind="hub"] :is(.chart-node-kicker,.chart-node-meta) {
  fill:#b8b8bd;
}

.chart-node[data-kind="hub"] .chart-node-title {
  fill:#fff;
}

.chart-port {
  fill:var(--chart-route);
  stroke:#fff;
  stroke-width:1.5;
}

.chart-system [data-dim="true"] {
  opacity:.16;
}

.chart-caption {
  margin:0;
  padding:13px 20px;
  border-top:1px solid var(--chart-line);
  background:rgb(255 255 255 / 76%);
  color:var(--chart-muted);
  font-size:11px;
  line-height:1.4;
}

/* React Flow adapters use the same token vocabulary as SVG charts. */
.chart-flow-shell {
  flex:1;
  min-height:0;
}

.chart-system .react-flow {
  width:100%;
  height:100%;
}

.chart-system .react-flow__handle {
  opacity:0;
  width:6px;
  height:6px;
  min-width:0;
  min-height:0;
  border:0;
  background:transparent;
  pointer-events:none;
}

.chart-system .react-flow__attribution {
  display:none;
}

.chart-rf-zone {
  width:100%;
  height:100%;
  padding:12px 16px;
  border:1px solid var(--chart-line);
  border-radius:10px;
  background:var(--chart-lane);
}

.chart-rf-zone span {
  color:var(--chart-ink);
  font-size:13px;
  font-weight:600;
}

.chart-rf-node,
.chart-rf-chip {
  width:100%;
  height:100%;
  border:1.2px solid var(--chart-node-line);
  border-radius:var(--chart-node-radius);
  background:var(--chart-node);
  box-shadow:0 3px 8px rgb(29 29 31 / 8%);
}

.chart-rf-node {
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:3px;
  padding:14px 18px;
  text-align:left;
}

.chart-rf-node.with-image {
  flex-direction:row;
  align-items:center;
  gap:12px;
  padding:10px 14px 10px 10px;
}

.chart-rf-node img {
  flex:none;
  width:76px;
  height:76px;
  border-radius:6px;
  object-fit:cover;
  object-position:50% 30%;
  background:var(--chart-canvas);
}

.chart-rf-copy {
  display:flex;
  min-width:0;
  flex-direction:column;
  gap:3px;
}

.chart-rf-node.is-hub {
  border-color:var(--chart-hub);
  background:var(--chart-hub);
}

.chart-rf-node.is-hub .chart-rf-label {
  color:#fff;
}

.chart-rf-node.is-hub .chart-rf-detail {
  color:#b8b8bd;
}

.chart-rf-chip {
  display:flex;
  align-items:center;
  justify-content:flex-start;
  padding:10px 14px;
}

.chart-rf-label {
  color:var(--chart-ink);
  font-size:14px;
  font-weight:600;
  line-height:1.25;
}

.chart-rf-chip .chart-rf-label {
  font-size:13px;
}

.chart-rf-detail {
  color:var(--chart-muted);
  font-size:12px;
  line-height:1.4;
}

.chart-system .react-flow__edge-text {
  font-family:var(--chart-font);
  font-size:11px;
}

@media (max-width:760px) {
  .chart-head {
    min-height:auto;
    padding:16px;
  }

  .chart-system.is-fullscreen-preview {
    inset:16px;
  }
}