These are nice but it's funny how they fall short: 1: you can't combine attr() and calc() - calc(attr(data-count) + 10) <-- nope 2: how would you count down f

These are nice but it's funny how they fall short: 1: you can't combine attr() and calc() - calc(attr(data-count) + 10) <-- nope 2: how would you count down from an arbitrary number of child elements? you need to set the total via counter-reset... and, no you can't do content-reset: foo attr(data-count)