17 enforceable rules pulled verbatim from the spec
Do
Use Near-Black (`#262626`) for text — not pure black, it's warmer and more readable
Use Poppins as the primary typeface — it defines the brand personality
Keep font weights between 400-600 — the system uses a narrow weight range for subtle hierarchy
Use the extracted shadow patterns for elevation — they are tuned to match the brand palette
Use #ffe456 (`#ffe456`) as the primary accent — it's the brand's signature interactive color
Use 50px border-radius on primary buttons — the brand uses generously-rounded CTAs
Style form inputs with a `1px solid rgb(204, 204, 204)` border — use border-based inputs, not floating labels or underline-only
Each card includes a top image — imagery is part of the card identity, not optional
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 — 600 is the maximum weight in this system
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 use sharp-cornered or pill buttons — 50px is the CTA border-radius standard
Don't remove the input border — the border is the primary affordance indicator for form fields
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 choisis-ton-avenir.com design system.
Canvas #ffffff · ink #262626 · accent #ffe456.
Type: Poppins — 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.