Flat Design 2.0 Plans with Billing Toggle

Act like a frontend developer with 15 years of experience. I want the exact same UI with 95-99% similarity.

Platform: This is a RESPONSIVE design — it should work on both mobile and desktop. Use mobile layout patterns (bottom nav, stacked content) for mobile, and desktop layout patterns (sidebar/nav bar, wider content areas) for web.

Design a pricing screen with a monthly/yearly segmented toggle at the top showing a "Save 20%" chip, and three compact plan cards in a horizontal scroll row.

Visual style — Flat Design 2.0:
Large soft-color geometric illustration blocks with simple rounded blob-people figures as decorative accents. Flat solid-fill cards at 12px radius, no shadow, no gradient, no texture. Confident single-weight sans-serif. Clean, friendly, corporate-startup illustration style.

Color palette — Coral Navy:
Background #FFFFFF, surfaces #F5F6F8. Text #14213D. Illustration coral #FF6F59 and navy #14213D.

Typography — use these exact font families:
- Headings / display: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif

Commit fully to this style — it should be unmistakable at a glance. Use realistic content, not placeholder text. Keep animations smooth (200ms ease-out).