.wiki-heading__collapsible {
  cursor: pointer;
  /* border-bottom: 1px solid #000; */
}
.wiki-heading__collapsible::before {
  content: '^';
  display: inline-block;
  transform: translateY(-5%) rotate(180deg);
  font-weight: 100;
  filter: opacity(0.5);
}
.wiki-heading__collapsible.collapsed::before {
  transform: translateX(-5%) rotate(90deg);
}

.wiki-heading__toc {
  border: 1px solid #999;
  display: inline-block;
  padding: .5em;
}
.wiki-heading__toc-header {
  font-size: 1.2em;
}
.wiki-heading__toc-item.h1 {
  text-indent: 0em;
}
.wiki-heading__toc-item.h2 {
  text-indent: 1em;
}
.wiki-heading__toc-item.h3 {
  text-indent: 2em;
}
.wiki-heading__toc-item.h4 {
  text-indent: 3em;
}
.wiki-heading__toc-item.h5 {
  text-indent: 4em;
}
.wiki-heading__toc-item.h6 {
  text-indent: 5em;
}