Adam Argyle is clear with some 2025 CSS advice: I think every front-end developer should know how to enable  page transitions , transition a  <dialog> ,  popover , and  <details> , animate light n’ dark  gradient text ,  type safe their CSS  system, and  add springy easing  to animation. Nobody asked me, but if I had to pick a favorite of Adam’s six, it’s all the stuff about animating <dialog> , popover, and <details> . There is a lot of interesting new-ish CSS stuff in there that will help you all around, between allow-discrete , overlay , ::backdrop , :popover-open , @starting-style , and more.…