table.wp-list-table mark.pre-order {
    background:transparent none;
    color:#33ccff;
    font-weight:700;
    line-height:1;
}
.hidden {
    display: none;
}
.options_group_preorder.form-row input[type=text],
.options_group_preorder.form-row input[type=number] {
    padding: 0 8px;
}
#variable_product_options .form-row.variable_stock_status select option[value="onpreorder"] {
    display: none;
}