CSS text-decoration family (not just for underlining links)
CSS text-decoration Property - GeeksforGeeks
CSS Text-decoration - TAE
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)
Text-decoration | HTML & CSS Wiki | Fandom
html - How to strike through obliquely with css - Stack Overflow