fieldset {
  width: 80%;
  margin: auto;
}

label {
  float: left;
  width: 30%;
  text-align: right;
  padding-right: 1em;
  margin-left: 15%;

}

input {
  display: block;
  width: 30%
}

button {
  display: block;
  margin: auto;
  margin-top: 1em;
}