You don't need JavaScript for that
In contrast to JS, which is imperative, HTML and CSS are declarative. You tell the browser what to do, not how to do it. That means the browser gets to choose how to do it, and it can do it in the most efficient way possible.
Because HTML and CSS features are handled by the browser they can be more performant, more native, more adaptable to user preferences and in general, more accessible. That doesn’t mean it will always be (especially when it comes to accessibility) but when the browser does the heavy lifting for you, your end users will generally have a better experience.