body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
  color: #333;
}

header {
  background-color: #003366;
  color: white;
  padding: 20px;
  text-align: center;
}

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

nav ul li {
  margin: 0 15px;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 30px;
  background-color: white;
  max-width: 1000px;
  margin: 0 auto;
}

footer {
  background-color: #003366;
  color: white;
  text-align: center;
  padding: 15px;
  position: relative;
  bottom: 0;
  width: 100%;
}