nav {
  position: fixed;
  width: 15%;
  height: 100%;
  background-color: var(--prussian-blue);
  color: white;
  padding: 20px;
  overflow-y: auto;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

nav li {
  margin-bottom: 10px;
}

nav a {
  text-decoration: none;
  color: white;
}

main {
  margin-left: 15%;
  padding: 20px;
}

h1 {
  width: 800px;
  font-size: 2.0rem;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--prussian-blue-dark);
}

h2 {
  width: 800px;
  font-size: 1.5rem;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--prussian-blue-dark);
}

p {
  max-width: 75ch;
  font-size: 16px;
}

ol {
  max-width: 75ch;
}