body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: #f8f9fa;
  color: #333;
}
header {
  background: #0077b6;
  color: white;
  padding: 20px 10px;
  text-align: center;
}
nav {
  background: #023e8a;
  text-align: center;
  padding: 10px 0;
}
nav a {
  color: white;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
}
main {
  padding: 20px;
}
section {
  margin-bottom: 40px;
}
h2 {
  color: #0077b6;
}
footer {
  background: #023e8a;
  color: white;
  text-align: center;
  padding: 10px;
  font-size: 0.9em;
}