Design taste for Opus 5.5

These are screenshots of sites I like. Don't touch any code yet:
1. For each one, tell me what it does well: layout, typography, color, spacing, white space.
2. List what they have in common, ask me which parts I want, and wait for my answer before going on.
3. Write a DESIGN.md in the project root based on what I pick, with real values: font sizes, weights, color codes, spaci…

npx skills add shadcn/ui
Use the shadcn skill to start a new Next.js project, build a design system from this DESIGN.md, and finish with a design system page. Download the file into the project before you read it: <Raw link>

Install good-css following the README at https://github.com/vojtaholik/good-css, then read its SKILL.md and the reference files you need.
Then use it to check this project's existing styles (CSS files and Tailwind classes in components both count) for three kinds of problems:
1. Things that break on phones: hover states that stick after a tap, and tap areas smaller than 44px.
2. Things CSS can do that were built with scripts or a pile of breakpoints: dropdown…

Before you ship a vibe-coded site, have Opus 5.5 send out 5 subagents to check these 20 things, then fix them all in one pass:
Consistent design
- Write a DESIGN.md first, and make every color, font size, spacing and corner radius follow it
- Keep the palette restrained and the type hierarchy clear