When you've spent 3 hours debugging why your div won't center and you've finally reached enlightenment: just slap !important on everything and call it a day. Both buttons pressed simultaneously because we're not choosing between HTML and CSS—we're declaring war on both. The nuclear option of web development. Sure, your senior dev will roast you in code review, and future-you will curse present-you when trying to override those styles, but right now? Right now it works, and that's all that matters. Specificity wars be damned.