body {
  max-width: 700px;
  margin: 40px auto;
  padding: 0 16px;
  font-family: Arial, sans-serif;
  line-height: 1.5;
}

nav {
  margin-bottom: 32px;
}

nav a {
  margin-right: 12px;
}

h1, h2 {
  line-height: 1.2;
}

ul {
  padding-left: 20px;
}