[role="main"] h4 {
    font-size: 125%;
    font-weight: bold;
    margin-top: 2em;
    margin-bottom: 0.5em;
}
[role="main"] h4::before {
  content: "⚪︎";
  font-size: 120%;
  vertical-align: middle;
  padding: 0 4px;
}

.callout.warning {
    color: #cc3333;
    background: #ffffcc;
    font-weight: bold;
}