h1, h2, h3 {
  text-align: center;
}

fieldset {
  width: 30%;
  margin-left: auto;
  margin-right: auto;
}

input {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

label {
  display: block;
  text-align: center;
  width: 100%;
}