body {
  font-family: Georgia, serif;
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
  line-height: 1.6;
  background-color: #f6f3ed;
  color: #1f2933;
}

nav {
  margin-bottom: 20px;
}

nav a {
  margin-right: 15px;
  text-decoration: none;
  font-weight: bold;
}

a {
  color: #1d4ed8;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  color: #111827;
}

hr {
  border: none;
  border-top: 1px solid #c9c2b8;
  margin: 24px 0;
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #111827;
    color: #e5e7eb;
  }

  h1, h2, h3 {
    color: #f9fafb;
  }

  a {
    color: #7dd3fc;
  }

  hr {
    border-top: 1px solid #374151;
  }
}