#parallax {
    height: 200vh;
    overflow: hidden;
    position: absolute;
    z-index: 1;
    width: 100%;
}

.layer {
    background-position: top center;
    background-size: auto;
    background-repeat: no-repeat;
    width: 100%;
    height: 1000px;
    position: fixed;
    z-index: -1;
}


.layer-bg2 {
    background-image: url("Elements/fond1.jpg");
    opacity: 0.7;
    background-size: cover;
}
	
.layer img{
    width: 100%;
}