...It is composed of multiple layers, including React Spectrum for styled components, React Aria for accessibility and interaction logic, and React Stately for state management, creating a modular architecture that separates behavior, state, and presentation. The library is designed to provide out-of-the-box accessibility, supporting keyboard, mouse, and touch interactions while adhering to WAI-ARIA standards. It also includes built-in internationalization features, supporting multiple languages, right-to-left layouts, and localized formatting for dates and numbers. React Spectrum emphasizes adaptability, ensuring components work seamlessly across different devices, screen sizes, and input methods.