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# Design System: Expo — Visual Theme & Atmosphere

Expo's interface is a luminous, confidence-radiating developer platform built on the premise that tools for building apps should feel as polished as the apps themselves. The entire experience lives on a bright, airy canvas — a cool-tinted off-white (`#f0f0f3`) that gives the page a subtle technological coolness without the starkness of pure white. This is a site that breathes: enormous vertical spacing between sections creates a gallery-like pace where each feature gets its own "room."

The design language is decisively monochromatic — pure black (`#000000`) headlines against the lightest possible backgrounds, with a spectrum of cool blue-grays (`#60646c`, `#b0b4ba`, `#555860`) handling all secondary communication. Color is almost entirely absent from the interface itself; when it appears, it's reserved for product screenshots, app icons, and the React universe illustration — making the actual content burst with life against the neutral canvas.

What makes Expo distinctive is its pill-shaped geometry. Buttons, tabs, video containers, and even images use generously rounded or fully pill-shaped corners (24px–9999px), creating an organic, approachable feel that contradicts the typical sharp-edged developer tool aesthetic. Combined with tight letter-spacing on massive headlines (-1.6px to -3px at 64px), the result is a design that's simultaneously premium and friendly — like an Apple product page reimagined for developers.

## Key Characteristics

- Luminous cool-white canvas (`#f0f0f3`) with gallery-like vertical spacing
- Strictly monochromatic: pure black headlines, cool blue-gray body text, no decorative color
- Pill-shaped geometry everywhere — buttons, tabs, containers, images (24px–9999px radius)
- Massive display headlines (64px) with extreme negative letter-spacing (-1.6px to -3px)
- Inter as the sole typeface, used at weights 400–900 for full expressive range
- Whisper-soft shadows that barely lift elements from the surface
- Product screenshots as the only source of color in the interface
