@media (max-width: 799px) {
    body.error404 h1 {
        text-align: center;
    }

    .error-tel {
        text-align: center;
    }

    .error-zeiten {
        padding: 0 !important
    }

    body.error404 .wp-block-group.alignfull {
        max-width: 390px;
        margin-left: auto;
        margin-right: auto;
    }
}