First on my Top 3 (no importance in the order), Ana Tudor, came to show us what it was possible to do with maths and css code. Said like that, we don’t see at glance the relation but in practice, it’s a delight !
Unfortunately her talk is not yet available on video, I cannot include it here then.
Fortunately, I can invite you to visit her CodePen, and discover her numerous examples that she can do while combining the two fields. Personally, I love, applying algorithm and geometry formulas to obtain beautiful graphical rendering using CSS, it’s impressive !