body {
  font-family: system-ui, sans-serif;
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;
  line-height: 1.6;
}

nav {
  margin-bottom: 40px;
}

nav a {
  margin-right: 15px;
  text-decoration: none;
  color: #333;
}

nav a:hover {
  text-decoration: underline;
}