form#home-car-picker {
  width: 100%;
  text-align: center;
  margin: 1em auto;
  padding: 3em 6em;
  /* border: black 1px solid; */
  display: block;
}

form#home-car-picker select {
  width: 250px;
}

.regno-text-field {
  width: 50%;
  min-width: 10em;
  margin:0 auto;
}