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

label {
  float: left;
  width: 10em;
  clear: left;
  text-align: right;
  margin-right: 1em;
}

input, select {
  float: left;
}

button {
  float: left;
  clear: both;
  margin-left: 10em;
  margin-top: 1em;
}