.markdown-body h1 .octicon.octicon-link,
.markdown-body h2 .octicon.octicon-link,
.markdown-body h3 .octicon.octicon-link,
.markdown-body h4 .octicon.octicon-link,
.markdown-body h5 .octicon.octicon-link,
.markdown-body h6 .octicon.octicon-link {
  visibility: visible;
}

.markdown-body .octicon.octicon-heart-fill {
  fill: red;
}