.promptdisplay {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    font-size: 80px;
    padding: 20px; 
    background: #ccFFcc;
    border-radius: 10px;
    border-style: solid;
    border-width: 2px;
    width: auto;
}
h2 {
    text-align: center;
    font-size: 80px;
}