.container
{
    z-index: 99;
    position:absolute;
    top: 50%;
    left:  50%;
}
.body
{
    background-color: #f2f2f2;
    border-color: #808080;
    border-style: solid;
    border-width: 1px 1px;
    padding: 10px;
    padding-top: 13px;
}