How to make scroll be at curvebox level or cross-section level?

[JustinGOSSES]

Describe the bug
If you have multiple curveboxes next to one another for a single well. You'll want to see all the curves scroll as you have your mouse over a single box and scroll. Scrolling depends on settings in 2 or more nested divs? What is the easiest and most intuitive way to set this up? but also let people change it?

To Reproduce
https://observablehq.com/@justingosses/overly-simplified-stratigraphic-modeling

bottom of this
problem here.