/* Ken Burns effect */
.reveal .backgrounds .ken-burns {
    animation-name: ken-burns;
    animation-duration: 20s;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
    }
    
    @keyframes ken-burns {
    0% {
    transform: scale(1) translate(0, 0);
    }
    50% {
    transform: scale(1.2) translate(-5%, -5%);
    }
    100% {
    transform: scale(1) translate(0, 0);
    }
    }