.centerText {
    text-align: center;
    display: table-cell;
    vertical-align: middle;
    z-index: 1;
}

.bg {
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: 100% 100%;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    width: 100%;
}

body {
    display: table;
}