body {
  line-height: 2;
  font-size: 18px;
  font-family: Arial, Helvetica, sans-serif;
  border: 1px solid black;
  text-align: center;
}
button {
  width: 100px;
  height: 40px;
  background-color: white;
  text-align: center;
  color: black;
  font-size: 20px;
}