Build a production-ready, scalable design system in Figma tailored for fast development cycles. Fully configured with variables, design tokens, responsive auto layout, and dark/light mode theming. Deliverables:

Figma file with complete foundations (Typography, Color Palettes, Spacing, Elevation, Grid systems).

Reusable, accessible UI component library with interactive states and variants.

Comprehensive developer handoff documentation and token architecture.