17 enforceable rules pulled verbatim from the spec
Do
Use dark background (`#09090b`) as the foundation — this is a dark-mode-native design
Use GeistMono as the primary typeface — it defines the brand personality
Use negative letter-spacing (-1.8px) at display sizes for compressed, editorial headlines
Use the extracted shadow patterns for elevation — they are tuned to match the brand palette
Use Input (`#27272a`) as the primary accent — it's the brand's signature interactive color
Use 6px border-radius on buttons — the standard corner rounding for interactive elements
Make the hero full-viewport (≥70% screen height) — this design uses an immersive hero, not a tall navbar
Include exactly 3 CTAs in the hero (primary + secondary) — this design pattern is multi-action, not single-purpose
Place 4 pricing tiers side-by-side on desktop — direct comparison is the value prop
Lay out testimonials in a grid (4+ items) — quantity signals scale and trust
Don't
Don't use light backgrounds — the dark canvas is the native medium
Don't substitute with generic sans-serif or serif — the custom font carries the brand
Don't increase letter-spacing on headings — the type is designed to run tight at scale
Don't invent new shadow values — use only the extracted shadow levels
Don't introduce additional saturated accent colors — the palette is intentionally controlled
Don't make the nav sticky — this design lets it scroll away to maximize content focus
Don't put a CTA button in the nav — this design uses links only at the top
10
Agent guide & export
Paste-ready prompt + the real files behind this page
Build a UI in the xata.io design system.
Canvas #ffffff · ink #111111 · accent #27272a.
Type: GeistMono — respect the size/weight ladder in §3.
Radius, spacing, shadow: use only the extracted scales (no magic numbers).
Full spec follows — paste the DESIGN.md below into your agent.