body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
  background-color: #f7f9fb;
}

header {
  background-color: #333;
  color: white;
  padding: 2em 0;
}

section {
  padding: 3em 1em;
}

footer {
  background-color: #222;
  color: white;
  padding: 1em 0;
  margin-top: 2em;
}