In reply to https://geoffgraham.me/nth-child-counts-line-breaks-as-spans-in-css/. I think this is …

I think this is exactly what happens. A span:nth-child(3) selector will match only the span that is also its parent’s 3rd child. Your br isn’t counted as a span, it’s counted as a child element.

But today I learned that :nth-child() counts all elements[.]