This example demonstrates scroll-driven scaling: a sticky sky-blue box grows from 50% to 100% scale as the page scrolls through a 200vh wrapper. The App component tracks scroll progress via a `window.scrollY` event listener, computes a percentage from the scroll position relative to the wrapper’s total height, and applies the result as an inline `transform: scale()` style. It uses React’s `useState`, `useEffect`, `useRef`, and `useCallback` hooks, with rendering handled by `createRoot`.