Try hitting the tab key and notice how the focus stays within the modal itself. Also, esc to close modal.
Telefones e Endereço
Ver Telefones
Comercial
(11) 2479-3601
Visite nosso site 
RedeShop Visa Electron
Boleto
Formas de pagamento
Cartão de crédito: RedeShop Visa Electron Boleto