/* The figures converted from TikZ are black lines on a transparent ground,
   which vanish on the dark palette; give them a light ground there. */
[data-md-color-scheme="slate"] .md-typeset img[src$=".svg"] {
  background-color: #fff;
  border-radius: 0.2rem;
  padding: 0.4rem;
}

/* The TikZ figures keep their small printed size as SVG; scale them up. */
.md-typeset img[src*="images/grid-"] {
  width: 100%;
  max-width: 18rem;
}
.md-typeset img[src*="images/zone-"] {
  width: 100%;
  max-width: 36rem;
}