Shiny - access individual checkbox items by id

Is there a way to access individual checkbox items in a checkboxGroupInput by id so that these can be modified individually through css?

Example:

using the following:

#id input[type="checkbox"]:checked:after {
                background-color: #FE0004;
}

I can edit all checkboxes inside a checkboxGroupInput. I now want to edit each individual checkbox within a group. Does each option have a unique id?