html, body, .container-table {
    height: 100%;
}
.container-table {
    display: table;
}
.vertical-center-row {
    display: table-cell;
    vertical-align: middle;
}

input.invalid {
    border-color: transparent;
    -webkit-box-shadow: 0px 0px 5px 0px rgba(255,0,0,1);
    -moz-box-shadow: 0px 0px 5px 0px rgba(255,0,0,1);
    box-shadow: 0px 0px 3px 0px rgba(255,0,0,1);
}