div {
    font-family: Input, Monospace, fixed;
    font-size: 140%;
    height: 200px;
    width: 800px;

    position: fixed;
    top: 50%;
    left: 50%;
    margin-top: -100px;
    margin-left: -400px;
}

@media only screen
and (max-width : 500px) {
div {
  font-size: 80%;
/* Styles */
}