body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 1rem 0;
}

main {
  padding: 1rem;
}

section {
  margin-bottom: 2rem;
}

footer {
  text-align: center;
  padding: 1rem 0;
  background-color: #333;
  color: #fff;
}