body {
  font-family: sans-serif;
  background: #ffffff;
  color: #333;
  max-width: 800px;
  margin: auto;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

nav {
  text-align: center;
  margin-bottom: 2rem;
}

nav a {
  margin: 0 1rem;
  text-decoration: none;
  color: #007acc;
}

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

section {
  margin-bottom: 2rem;
}

h2 {
  border-bottom: 1px solid #ccc;
  padding-bottom: 0.3rem;
}

ul {
  list-style-type: disc;
  padding-left: 2rem;
}

ul ul {
  list-style-type: circle;
  padding-left: 1.5rem;
}

ol {
  list-style-type: decimal;
  padding-left: 2rem;
}

ul li, ol li {
  margin: 0.5rem 0;
}

footer {
  text-align: center;
  font-size: 0.9em;
  margin-top: 2rem;
  color: #666;
}