body {
  font-family: Arial, sans-serif;
  margin: 0;
  background-color: #f4f4f4;
  color: #333;
}
header {
  background-color: #0d47a1;
  color: white;
  padding: 2em;
  text-align: center;
}
main {
  padding: 2em;
}
section {
  margin-bottom: 2em;
}
footer {
  background-color: #1e2a38;
  color: #cfd8dc;
  text-align: center;
  padding: 1em;
}
a {
  color: #0d47a1;
  text-decoration: none;
}