.block-kit-heading {
  font-weight: bold;
}

.block-kit-heading.h1 {
  font-size: 20px;
  margin: 10px 0;
}

.block-kit-heading.h2 {
  font-size: 16px;
  margin: 8px 0;
}

.block-kit-heading.h3 {
  font-size: 14px;
  margin: 7px 0;
}