.fixed-header {
  min-height: 4em;
  line-height: 1.3;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
}

.citation {
  margin-bottom: 0.6rem;
}

/* a {
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

a.reference:hover {
  text-decoration: underline;
}

a.reference.internal {
  color: color-mix(in srgb, var(--pst-color-primary, #1a73e8) 70%, black);
}

a.reference.external {
  color: var(--pst-color-primary, #1a73e8);
} */

a.reference.external::after {
  content: " ↗";
  font-size: 0.9em;
  color: currentColor;
  opacity: 0.7;
}

.admonition.attention .admonition-title::after{
  content: "📢" !important;
}