main {
    background-image: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.75) 50vh), url('../_images/lp-background-21.jpg');
    background-attachment: scroll, fixed;
    background-position: center top;
    background-repeat: no-repeat;
    background-size: cover;
}