MayhemYDG/4chan-x — comment on commit 2490b9c7d24941e869bb5c2dc0128ddb28dd9a90
File:  line 0
By aeosynth:

oh, well that's also there:

https://developer.mozilla.org/en/CSS/Writing_Efficient_CSS#How_the_style_system_breaks_up_rules

> I use the term key selector in the paragraphs that follow. The key selector is the last part of the selector (the part that matches the element being matched, rather than its ancestors).

https://developer.mozilla.org/en/CSS/Writing_Efficient_CSS#How_the_Style_System_Matches_Rules

> The style system matches rules by **starting with the key selector, then moving to the left** (looking for any ancestors in the rule’s selector).