body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  margin: 0;
  background-color: #f7f7f7;
  color: #222;
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 60px auto;
  padding: 0 20px;
}

nav {
  margin-bottom: 40px;
}

nav a {
  margin-right: 20px;
  text-decoration: none;
  color: #0a7f5a;
  font-weight: 500;
}

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

h1 {
  margin-bottom: 5px;
}

.section {
  margin-top: 40px;
}

footer {
  margin-top: 60px;
  font-size: 14px;
  color: #666;
}