body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f0f0f0;
  margin: 0;
  padding: 0;
}

header, footer {
  background-color: #333;
  color: white;
  padding: 20px;
}

main {
  padding: 50px;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
}