/* Desktop default */
.slide-bg {
    background-image: url('../img/demos/one-page-agency/slides/slide-1.jpeg'); 
    background-size: cover; 
    background-position: center; 
    animation-duration: 20s;
}

/* Mobile override */
@media (max-width: 767px) {
	.slide-bg {
		background-image: url('../img/demos/one-page-agency/slides/slide-1_mob.jpeg');
	}
}