Browser-showpiece hero, SEO, and design polish for reins.tech

[karngyan]

Polishes the docs site (reins.tech) end to end: a new distinctive hero, full SEO, dark-mode contrast fixes, a fresh OG image, and one build-infra fix.

Hero

Replaces the split copy/terminal hero with a browser showpiece — a browser window being driven by an agent:

• Chrome bar on a production URL (app.acme.com/checkout) + the Chrome-style "reins is controlling this browser" banner.
• A sign-in form with e3/e7 element-ref chips and a cursor about to click Sign in.
• A docked agent session running reins snapshot → reins click --ref e7 → ✓ clicked e7.

Explored 4 directions (command-bar demo, browser showpiece, architecture flow, editorial minimal) via the ui.sh picker, informed by Linear / Firecrawl / Resend. Picker scaffolding fully removed after selection.

The same illustration is added to the README as a light/dark <picture>.

Design polish

• FAQ dividers (root cause): Tailwind v4 ships no default border color, so bare border-* fell back to currentColor — harsh near-black/near-white lines per theme. Added a base layer defaulting border-color to the token; fixes dividers site-wide.
• Dark-mode TOC: active items + rail thumb now use violet-300 so they're legible on the near-black background.
• Terminal: real macOS traffic-light colors; dark mode gets a distinct surface + ring so the card doesn't melt into the page.
• Hero backdrop utilities (dot grid + soft violet glow).

SEO

• Per-route title / description / canonical / OG via a small seo() helper.
• JSON-LD: SoftwareApplication (home), FAQPage (FAQ).
• Root: og:site_name, og:image dimensions/alt, light/dark theme-color.
• public/: sitemap.xml, robots.txt, llms.txt.
• New 1200×630 og.png matching the site (dark, violet glow, reins glyph).

Build fix

• packages/protocol tsdown.config.ts: clean: false. In pnpm dev, protocol's --watch wiped dist/ on startup while extension/cli builds resolved @reins/protocol from it in parallel → intermittent "Rolldown failed to resolve import". Single fixed entry overwrites in place, so cleaning was unnecessary.

Verification

• pnpm typecheck + biome check pass.
• pnpm build prerenders all 14 pages; picker fully absent from output; SEO tags confirmed in prerendered HTML.
• Hero, FAQ, and TOC verified in light + dark by driving the local dev site.

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