.koop-parallax {
    /* Set a specific height */
    min-height: 300px;
    /* Create the parallax scrolling effect */
    background-attachment: scroll;
    background-position: center;
	background-size: cover;
}

.koop-mask-size{
    min-height: 300px;
}
.koop-container-size{
    height: 300px;
}

@media(min-width: 768px){
	.koop-parallax{
		background-attachment: fixed;
	}
}