body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  margin: 20px auto;
  text-align: center;
  font-size: 150%;
}

input {
  font-size: 100%;
  text-align: center;
  padding: 5px 7px;
}