`appearance: none` goes a long way to resetting button styles. I usually make a .unbuttonify class to use or extend for things I want to behave like buttons (free focus, accessibility, and interactivity) but look like, say, a hamburger menu toggle.
are css resets not in vogue any more? I still use them for all my side projects. As well as a normalize.css[0] that smooths over any additional browser inconsistencies. The original Meyer reset is definitely overkill, but there are a couple newer more minimal ones out there[2][3]
