I'd toyed with CSS first-child, first-line, and first-letter classesva ways back ... and foud that
especially for '"cards-type" formats, these made finding and distinguishing new posts far clearer.
The style is (largely) incorporated in https://old.reddit.com/r/dredmorbius. An ello example with screenshots; https://ello.co/dredmorbius/post/QGKKdiuqUw6O7ROl-V3uJA