Is it possible to find the number of siblings an element has to use in CSS calc?
This stems from this question/answer where the solution works in Chrome but not in Firefox.
We can do various calculations using calc (taking into consideration the parent's styles, various variables, and simple arithmetic).
I'm hoping to do something along the lines of grid-row-start: span calc(numSiblings);
but I'm not certain it's possible to retrieve the number of siblings an element has using CSS.
I've seen this question which does the styling based on the explicit number of siblings, and I'm hoping there's a possibility for a more dynamic version.