@media screen and (max-width:568px) {
    body::before {
        background-image: url("../images/cards.jpg"); 
      }  
}

@media screen and (min-width:569px) {
    body::before {
        background-image: url("../images/cards_large.jpg"); 
      } 
}

.authentication-button::before{
    content: 'Continue';
}