body {
  max-width: 40em;
  margin: 0 auto;
  padding: 5px;
  font-family: Georgia, serif;
  font-size: 18px;
  line-height: 1.6em;
  color: black;
}
h1, h2, h3 {
  font-family: sans-serif;
  font-weight: normal;
}
h1{
    display: block;
    color: green;
    font-size: 30px;
    max-width: 30em;
}
h2 {
    font-size: 24px;
}
code {
    font-size: 15px;
    color: #1d1dc3;
}
.h3Color {
    color: green;
}