You can have it fix these things. It has the tools to analyze screenshots of the app and correct things like formating, alignment, color, etc.

I've been building a personal app with Opus 4.8 over the past two weeks and the design is excellent. I provided it with screenshots of what I wanted, then had it build out a gallery of functional UI elements (like designers do). Claude built out a tool that would screenshot the app, compare it to the design screenshot and automatically reposition elements or update the styles to match.

You can also provide it with a style guideline prompt and have it double check all the work it produced matches the UI style guidelines before committing.