body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f2f2f2;
  color: #333;
}

header {
  background: #004080;
  color: white;
  padding: 20px;
  text-align: center;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 10px 0 0 0;
  display: flex;
  justify-content: center;
  gap: 20px;
}

nav a {
  color: white;
  text-decoration: none;
}

main {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

footer {
  background: #004080;
  color: white;
  text-align: center;
  padding: 10px;
  position: fixed;
  width: 100%;
  bottom: 0;
}