body {
}

.div-center {
    width: 450px;
    height: 350px;
    /*background-color: #fff;*/
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    max-width: 100%;
    max-height: 100%;
    overflow: auto;
    padding: 1em 2em;
    /*border-bottom: 2px solid #ccc;*/
    display: table;
}