.example-source {
  display: inline-block;
  margin: 0 0 10px;
  padding: 2px 8px;
  border-radius: 999px;
  background: #f1f3f6;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .02em;
}

.example-source.textbook {
  background: #edf7f1;
  color: #18784a;
}