Refero Styles — DESIGN.md Library for AI Agents

• Source: https://styles.refero.design/
• Verdict: promote-to-dev
• Why: A curated library of DESIGN.md files extracted from hundreds of real product websites. Structured Markdown capturing colors, typography, spacing, motion, and component patterns — designed to be pasted into AI agent context before design requests. Turns "make it premium" into concrete constraints: palette, type scale, layout rhythm, component weight. Free to browse, copy, and use.