.parallax {
    overflow: hidden;
    position: fixed;
    width: 100vw;
    height: 100vh;
    z-index: -1;
}

.layer {
    overflow: hidden;
    position: absolute;
    width: 110%;
    height: 110%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-size: cover;
    pointer-events: none;
    background-position: center;
}