17 enforceable rules pulled verbatim from the spec
Do
Use Near-Black (`#1a1a1a`) for text — not pure black, it's warmer and more readable
Use Plain as the primary typeface — it defines the brand personality
Keep font weights between 350-500 — the system uses a narrow weight range for subtle hierarchy
Use full-pill radius (9999px) only for specific elements (avatars, pills, toggles)
Use Pure White (`#ffffff`) as the primary accent — it's the brand's signature interactive color
Respect the 4px–32px spacing range — the design uses a wide scale for visual breathing room
Include a search input directly in the nav — discoverability is a primary UX value here
Each card includes a top image — imagery is part of the card identity, not optional
Lay out testimonials in a grid (16+ items) — quantity signals scale and trust
Include a newsletter signup in the footer — email capture is part of the conversion funnel
Don't
Don't use pure black (`#000000`) for text — the near-black adds warmth
Don't substitute with generic sans-serif or serif — the custom font carries the brand
Don't use weight 700 (bold) or above — 500 is the maximum weight in this system
Don't apply pill radius on rectangular buttons or cards — it's reserved for specific interactive elements
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 pentagram.com design system.
Canvas #ffffff · ink #1a1a1a · accent #ffffff.
Type: Plain — 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.