#page-404-box {
    padding: 100px 0;
    text-align: center;
}

#page-404-box * {
    text-transform: initial;
    font-weight: 300;
    color: inherit;
    font-size: 1.5em;
    line-height: 1.4em;
}

#page-404-box:before {
    content: '404';
    display: block;
    padding: 25px 0 0.5em 0;
    font-size: 4em;
    font-weight: 900;
    text-align: center;
    opacity: 0.75;
}