.dialog
{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    text-align: center;
}

.dialog__content
{
    display: inline-block;
    vertical-align: middle;
    text-align: left;

    padding: 20px;
    border: solid 1px #BBB;
    border-radius: 5px;
    box-shadow: 0 5px 5px #CCC;
}

.dialog__aligner
{
    display: inline-block;
    width: 0;
    height: 100%;
    vertical-align: middle;
}