h1 {
  font-size: 24px;
  color: #333;
}

label {
  display: block;
}

label.required:after {
  margin-left: 1.0em;
  padding: 0px 6px 0px 6px;
  border-radius: 4px;
  font-size: 0.6em;
  color: white;
  background-color: #C44;
  content: "必須";
}