/** make math readable in dark mode */
body:not([data-theme="light"]) img.math {
  filter: invert(1);
}

a.reference.download.internal {
  background-color: transparent;
  color: var(--color-link);
  background-image: initial;
  border: 1px solid var(--color-link);
  font-weight: initial;
  padding: 0.5em;
  border-radius: .2rem;
}