h1 {
  text-align: center;
}

fieldset{
  width: 20em;
  margin-left: auto;
  margin-right: auto;
}

label {
  float: left;
  width: 10em;
  clear: left;
}

input {
  float: left;
}

button {
  clear: both;
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-top: 4em;
}

form p {
  background-color: #FFFF99;
  text-align: center;
}