.mirror{
    display: inline-block; 
    font-size: 30px;

    -webkit-transform: matrix(-1, 0, 0, 1, 0, 0);
    -moz-transform: matrix(-1, 0, 0, 1, 0, 0);
    -o-transform: matrix(-1, 0, 0, 1, 0, 0);
    transform: matrix(-1, 0, 0, 1, 0, 0);
}