h1 {
  text-decoration: underline;
}

h2 {
}

dl {
}

dt {
  background-color: #0052CC;
  color: white;
  padding: 10px;
  position: sticky;
  top: 0;
  left: 0;
  margin: 1em 0;
}

dd {
  margin-left: 0px;
}

dl.dt {
  color: red;
}

body {
/*  width: 500px;*/
  margin: 50px 50px 50px 50px;
}