body {
  font-family: 'CMUSerifRoman', serif;
  color: #222;
  line-height: 1.5;
  margin: 5rem auto;
  max-width: 40rem;
}

body > * {
  margin: 0 2rem;
}

header {
  border-bottom: 1px solid #222;
  margin-bottom: 1rem;
}

main {
  text-align: justify;
}

footer {
  border-top: 1px solid #222;
  margin-top: 1rem;
}

a {
  color: black;
  text-decoration: none;
  border: 1px solid aqua;
}

h1 a:hover, h2 a:hover, h3 a:hover, h4 a:hover, h5 a:hover, h6 a:hover {
  position: relative;
}

h1 a:hover::before, h2 a:hover::before, h3 a:hover::before, h4 a:hover::before, h5 a:hover::before, h6 a:hover::before {
  content: "§";
  position: absolute;
  left: -1em;
  color: inherit;
}

h1 {
  text-align: center;
  font-size: 2.5rem;
}