.myPopup {
    width:100%;
    height: 600px;
    position: relative;
    width: 50%;
    height: 30%;
    transform: (50%-300px, 50%-510px);
}
.ui-popup.ui-body-inherit {
    margin: auto;
    /* margin-top:10px; */
}

h1 {
    text-align: center;
    line-height: 80px;
}
p {
    text-indent: 2em;
}