vertical align-center: box-align: start|end|center|baseline|stretch;

vertical-align-center.css

div{
/*vertical align-center*/
    /* Internet Explorer 10 */
    display: -ms-flexbox;
    -ms-flex-pack: center;
    -ms-flex-align: center;
    /* Firefox */
    display: -moz-box;
    -moz-box-pack: center;
    -moz-box-align: center;
    /* Safari, Opera, and Chrome */
    display: -webkit-box;
    -webkit-box-pack: center;
    -webkit-box-align: center;
    /* W3C */
    display: box;
    box-pack: center;
    box-align: center;
}