Yes, but how do you ensure your selectors actually match the DOM elements, beyond testing them manually in the browser? How do you ensure there's not another se

Yes, but how do you ensure your selectors actually match the DOM elements, beyond testing them manually in the browser? How do you ensure there's not another selector somewhere else in your code base that accidentally overrides the first selector under certain conditions? I should mention, the above questions are largely driven by my experience of working on large code bases of tens of thousands of lines of CSS, written by dozens if not hundreds of people over the course of a decade. Then again, OP says "You never know what could go wrong." and this precisely matches my feeling whenever I work on some non-trivial CSS, so I don't think I'm the only one struggling with this.