Modal Window

Requirements:

• Implement a button that, when clicked, displays a modal window over the page content.
• The modal should have a close (X) button and clicking outside the modal content should also dismiss it.
• Include an overlay to obscure the main page content while the modal is active.

Notes:

• Focus on making the modal accessible, including trapping focus within the modal when it is open and returning focus to the trigger button when it closes.