body {
  font-family: Arial;
  max-width: 600px;
  margin: auto;
  padding: 20px;
}
label {
  display: block;
  margin: 10px 0;
}
button {
  margin-top: 20px;
  padding: 10px 20px;
}
h2 {
  margin-top: 20px;
  color: darkgreen;
}