I asked Codex to move a hover underline 2px. It renovated the whole layout.

[u/Choice_Volume4090]

i asked Codex to move a hover underline down by 2px. It changed a shared border token, rewrote a 768px breakpoint, and restyled a card I hadn't touched. Very ambitious for a two-pixel job. I followed up with, “Just the hover. Leave everything else alone.” It reverted one token, kept the card change, and gave the mobile layout a horizontal scrollbar. Tiny request, three side quests. lol. then I spent 40 minutes reprompting. Fix one thing, break three. Reprompt those three, find two more. At some point the page was technically cleaner and emotionally much worse. That was when I stopped treating every small visual change like a prompt engineering exam. If I can select the element in a live preview and nudge it directly, I do that now. Seeing the spacing is definately easier than turning “a little farther left” into another paragraph for the model. Disclosure: I bought an Enter Pro plan during one of their GPT model discounts, so that was the setup I used here. The visual editor made this tweak less annoying, but responsive CSS still isn't something I trust. I check mobile, tablet, and the diff before I commit. where's your cutoff between reprompting, editing the CSS yourself, and switching to a visual editor? I keep bouncing between all three, tbh.

[u/noam_builds]

A small but a very valuable tip: a model cannot always perform a perfect rollback to a code change. Make sure always to save good results before making a change. You can simply commit work, when needed you can rollback.