body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #ffffff;
  color: #333;
}

header {
  background: #f5f5f5;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin-bottom: 5px;
}

nav a {
  margin: 0 10px;
  text-decoration: none;
  color: #0077cc;
}

main {
  padding: 20px;
  max-width: 1000px;
  margin: auto;
}

section {
  margin-bottom: 40px;
}

section h2 {
  color: #003366;
}

pre {
  background: #f0f0f0;
  padding: 10px;
  overflow-x: auto;
  font-size: 0.9em;
}

footer {
  text-align: center;
  padding: 15px;
  background: #f5f5f5;
  font-size: 0.9em;
  margin-top: 40px;
}