Hover and :focus-within row highlighting

Heading 1	Heading 2	Heading 3	Heading 4
Content 1 a	Content 2 a	Content 3 a	Content 4 a
Content 1 b	Content 2 b	Content 3 b	Content 4 b
Content 1 c	Content 2 c	Content 3 c	Content 4 c