CSS to make Mermaid SVG charts automatically switch to light/dark mode based on class `dark` of parents

mermaidSvg.css

#graph-div {
  font-family: 'trebuchet ms', verdana, arial, sans-serif;
  font-size: 16px;
  fill: #333;
}
#graph-div .error-icon {
  fill: #552222;
}
#graph-div .error-text {
  fill: #552222;
  stroke: #552222;
}
#graph-div .edge-thickness-normal {
  stroke-width: 2px;
}
#graph-div .edge-thickness-thick {
  stroke-width: 3.5px;
}
#graph-div .edge-pattern-solid {
  stroke-dasharray: 0;
}
#graph-div .edge-pattern-dashed {
  stroke-dasharray: 3;
}
#graph-div .edge-pattern-dotted {
  stroke-dasharray: 2;
}
#graph-div .marker {
  fill: #333333;
  stroke: #333333;
}
#graph-div .marker.cross {
  stroke: #333333;
}
#graph-div svg {
  font-family: 'trebuchet ms', verdana, arial, sans-serif;
  font-size: 16px;
}
#graph-div .label {
  font-family: 'trebuchet ms', verdana, arial, sans-serif;
  color: #333;
}
#graph-div .cluster-label text {
  fill: #333;
}
#graph-div .cluster-label span,
#graph-div p {
  color: #333;
}
#graph-div .label text,
#graph-div span,
#graph-div p {
  fill: #333;
  color: #333;
}
#graph-div .node rect,
#graph-div .node circle,
#graph-div .node ellipse,
#graph-div .node polygon,
#graph-div .node path {
  fill: #ececff;
  stroke: #9370db;
  stroke-width: 1px;
}
#graph-div .flowchart-label text {
  text-anchor: middle;
}
#graph-div .node .katex path {
  fill: #000;
  stroke: #000;
  stroke-width: 1px;
}
#graph-div .node .label {
  text-align: center;
}
#graph-div .node.clickable {
  cursor: pointer;
}
#graph-div .arrowheadPath {
  fill: #333333;
}
#graph-div .edgePath .path {
  stroke: #333333;
  stroke-width: 2px;
}
#graph-div .flowchart-link {
  stroke: #333333;
  fill: none;
}
#graph-div .edgeLabel {
  background-color: #e8e8e8;
  text-align: center;
}
#graph-div .edgeLabel rect {
  opacity: 0.5;
  background-color: #e8e8e8;
  fill: #e8e8e8;
}
#graph-div .labelBkg {
  background-color: rgba(232, 232, 232, 0.5);
}
#graph-div .cluster rect {
  fill: #ffffde;
  stroke: #aaaa33;
  stroke-width: 1px;
}
#graph-div .cluster text {
  fill: #333;
}
#graph-div .cluster span,
#graph-div p {
  color: #333;
}
#graph-div div.mermaidTooltip {
  position: absolute;
  text-align: center;
  max-width: 200px;
  padding: 2px;
  font-family: 'trebuchet ms', verdana, arial, sans-serif;
  font-size: 12px;
  background: hsl(80, 100%, 96.2745098039%);
  border: 1px solid #aaaa33;
  border-radius: 2px;
  pointer-events: none;
  z-index: 100;
}
#graph-div .flowchartTitleText {
  text-anchor: middle;
  font-size: 18px;
  fill: #333;
}
#graph-div :root {
  --mermaid-font-family: 'trebuchet ms', verdana, arial, sans-serif;
}

/* Dark mode */
.dark #graph-div {
  fill: #ccc;
}
.dark #graph-div .error-icon {
  fill: #a44141;
}
.dark #graph-div .error-text {
  fill: #ddd;
  stroke: #ddd;
}
.dark #graph-div .marker {
  fill: lightgrey;
  stroke: lightgrey;
}
.dark #graph-div .marker.cross {
  stroke: lightgrey;
}
.dark #graph-div .label {
  color: #ccc;
}
.dark #graph-div .cluster-label text {
  fill: #f9fffe;
}
.dark #graph-div .cluster-label span,
.dark #graph-div p {
  color: #f9fffe;
}
.dark #graph-div .label text,
.dark #graph-div span,
.dark #graph-div p {
  fill: #ccc;
  color: #ccc;
}
.dark #graph-div .node rect,
.dark #graph-div .node circle,
.dark #graph-div .node ellipse,
.dark #graph-div .node polygon,
.dark #graph-div .node path {
  fill: #1f2020;
  stroke: #81b1db;
}
.dark #graph-div .arrowheadPath {
  fill: lightgrey;
}
.dark #graph-div .edgePath .path {
  stroke: lightgrey;
}
.dark #graph-div .flowchart-link {
  stroke: lightgrey;
}
.dark #graph-div .edgeLabel {
  background-color: hsl(0, 0%, 34.4117647059%);
}
.dark #graph-div .edgeLabel rect {
  background-color: hsl(0, 0%, 34.4117647059%);
  fill: hsl(0, 0%, 34.4117647059%);
}
.dark #graph-div .labelBkg {
  background-color: rgba(87.75, 87.75, 87.75, 0.5);
}
.dark #graph-div .cluster rect {
  fill: hsl(180, 1.5873015873%, 28.3529411765%);
  stroke: rgba(255, 255, 255, 0.25);
}
.dark #graph-div .cluster text {
  fill: #f9fffe;
}
.dark #graph-div .cluster span,
.dark #graph-div p {
  color: #f9fffe;
}
.dark #graph-div div.mermaidTooltip {
  background: hsl(20, 1.5873015873%, 12.3529411765%);
  border-color: rgba(255, 255, 255, 0.25);
}
.dark #graph-div .flowchartTitleText {
  fill: #ccc;
}