table.sortable tbody {
counter-reset: sortabletablescope;
}
table.sortable thead tr::before {
    content: "";
    display: table-cell;
}
table.sortable tbody tr::before {
    content: counter(sortabletablescope);
    counter-increment: sortabletablescope;
    display: table-cell;
    text-align: right;
    vertical-align: middle;
}