I gave up on making my AI builder write good media queries

An AI website builder repeatedly produced pages that looked fine on mobile but weak on desktop when asked to generate custom responsive CSS.

Prompt tweaks and tests across multiple models, including Cerebras GPT-OSS 120B, Groq Llama 4 Scout, and Cloudflare Qwen3 30B, did little to fix the issue.

The breakthrough came from switching the builder to Tailwind CSS via CDN, with desktop-friendly utility classes and an inline config loaded before the script.

The result suggests AI builders handle explicit utility-class responsive design more reliably than freeform CSS media queries.