h1 {
  color: #000;
  background: #E0F2F1;
  padding: 0.5em;
}
h2 {
  font-weight: bold;
  color: #000;
  border-bottom: solid 2px #4DB6AC;
  padding-bottom: 5px;
}
h3 {
  border-bottom: dotted 1px #009688;
}