An LLM can absolutely center a div and then use a browser MCP or playwright to visually validate that it was centered.

Lmao, imagine doing all this instead of just centering the div yourself. This explains why everyone I work with that uses llms is slow af. Its all pseudo-productivity, its kinda similar to how people sit around customizing their nvim config feeling productive but not actually accomplishing anything. The difference is you pay money for this junk.