.center {
    margin-left: auto;
    margin-right: auto;
}

.full-center {
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}

.text-center {
    text-align: center;
}

.hn-center {
    text-align:center;
}