body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
}

header {
  background-color: #004d99;
  color: white;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin: 0;
}

nav {
  margin-top: 10px;
}

nav a {
  color: white;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
}

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

main {
  padding: 20px;
  background-color: white;
  margin-top: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.intro {
  max-width: 800px;
  margin: 0 auto;
}

footer {
  background-color: #004d99;
  color: white;
  text-align: center;
  padding: 10px;
  position: fixed;
  bottom: 0;
  width: 100%;
}

@media (max-width: 768px) {
  nav a {
    display: block;
    margin: 10px 0;
  }
}