[epgui]

I agree, but I'd even say that becoming pro at CSS is orders of magnitude easier than becoming pro at your average programming language. I think engineers just tend to not take the task seriously, and don't apply themselves enough.

You just need to actually understand the box object model and a handful of common gotchas.

[eurasiantiger]

CSS is essentially declarative programming for several different black-box systems.

How selectors are written has exponential performance implications. Using the wrong type of transform might make your page forego hardware acceleration, or use more battery on a mobile device.

At least typical programming languages are targeting a known set of environments and devices with known characteristics.

You definitely need to understand a lot more than the box model and a handful of gotchas.