Build a moderately-accessible modal dialog in React that supports multiple ways to close and includes basic keyboard handling.

Requirements:

1. A button opens the modal.
2. Modal contains a title, content, and a close button.
3. Users can close the modal by:
   • Clicking the close button
   • Clicking outside the modal
   • Pressing the Escape key
4. Accessibility:
   • Use role="dialog" and aria-modal="true".
   • Connect title and description with aria-labelledby and aria-describedby.
   • Focus should move to the modal when opened.
   • Return focus to the trigger button when closed.
   • No need for advanced focus trapping (only basic focus management).