.error-page {
    background-color: red;
    position: absolute;
    height:100%;
    width:100%;
    text-align: center;
    color:white;
    display: table;
    z-index: 99999;
}

.fa {
    font-size: 50px;
}

a {
    text-decoration: underline;
}

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