h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 24px;
  margin-bottom: 16px;
  padding-bottom: 0.3em;
  font-weight: 600;
  line-height: 1.25;

  border-bottom: 1px solid #d7dde3;

  font-family: "IBM Plex Serif", serif;
  font-kerning: normal;
  font-variant-ligatures: normal;

  code {
    padding: 0 0.2em;
    font-size: inherit;
  }
}

h1 {
  font-size: 2em;
}