DO
Default to dark theme — it is the native, primary experience.
Use #3ECF8E only for primary CTAs, active nav states, and brand identity.
Communicate depth through background layering (surface-100 → 200 → 300), not shadows.
Keep borders thin (1px) and use border-color variation to express hierarchy.
Use 400 weight for body text and 500 for interactive labels only — no 700 in UI.
Apply 9999px radius to marketing pill buttons, 6px to interface action buttons.
DON'T
Don't use brand green as a decorative color, background fill, or general highlight.
Don't add drop shadows to flat card surfaces — use border color differences instead.
Don't use font-weight: 700 or heavier anywhere in the UI.
Don't round dashboard card corners beyond 8px — reserve 16px for marketing cards.
Don't use color alone to convey status — always pair with text or icon.
Don't use modals for confirmations that can be handled inline or with a toast.