body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  margin: 0;
  padding: 0;
  background: #f7f7f7;
  color: #222;
}

header {
  background: #2f6b4f;
  color: white;
  padding: 1rem;
}

nav a {
  color: white;
  margin-right: 1rem;
  text-decoration: none;
  font-weight: 500;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 1rem;
  background: white;
}

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  color: #666;
}