devdocs/assets/stylesheets/pages/_requirejs.scss

._requirejs {
  padding-left: 1rem;

  h1, h2, h3, ul.index { margin-left: -1rem; }
  h2 { @extend %block-heading; }
  h3 { @extend %block-label, %label-blue; }
  h4 { font-size: 1em; }

  ul.index ul { margin: .5em 0; }
}