body {
    margin: 0px;
}

.outer {
    display: table;
    position: absolute;
    height: 100%;
    width: 100%;
}

.middle {
    display: table-cell;
    vertical-align: middle;
}

.inner {
    margin-left: auto;
    margin-right: auto; 
    text-align: center;
    width: 80%;
}

@media only screen and (min-width : 480px) {
    .inner {
        width: 80%;
    }
}

@media only screen and (min-width : 768px) {
    .inner {
        width: 65%;
    }
}

@media only screen and (min-width : 992px) {
    .inner {
        width: 50%;
    }
}

@media only screen and (min-width : 1200px) {
    .inner {
        width: 35%;
    }
}

hr {
    margin-top: 40px;
    margin-bottom: 40px;
}