css3-text-decor][css4-background] @pattern for defining filling and decoration patterns from Sebastian Zartner on 2012-09-24 (www-style@w3.org from September 2012)
CSS: Overview (26. Links and text decoration) BUG? - CSS - Codecademy Forums
CSS text-decoration family (not just for underlining links)
CSS3 Text Module
css-text-decor] Limits on text-underline-offset to preserve semantic meaning · Issue #4059 · w3c/csswg-drafts · GitHub
Stefan Judis on X: "I can't wait for all these new text-decoration properties to be widely supported. It's still early stages, but broader support of properties to e.g. define the underline thickness