* {
    margin: 0 auto;
    outline: 0 none;
    padding: 0;
}
html, body {
    height: 100%;
}
.marco{
    width: 100%;
    height: 100%;
    display: table;
}
.marco .marco-cont {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}