Having done quite a bit of CSS, including changing CMB2 (hiding buttons, displaying others), it is only as good as the <div> within the code. The css is just the class what the DIV references, thus the code would have to be changed in order to define it..thus the problem.
Difference between this:
<div>THE ROW AND </DIV>
and this
<div><div class="column1"><div class="column2"><div>
Seems like doing my own render, would mean redoing the render for all the fields as well..or am I missing something, that you know, that I do not?