Try hitting the tab key and notice how the focus stays within the dialog itself.
To close dialog hit the esc button, click on the overlay or just click the close button.
Element used to launch the modal would receive focus back after closing.
With a beautiful view of the heart of the island, colorful streets and lots of fun; Señor Frog's Cozumel is known for having the best atmosphere where you can enjoy delicious drinks and exquisite food, a place like no other!