@media (max-width:991px) {
    body.poster {
        margin-top: 60vh;
    }
}

body.poster {
    background-attachment: fixed;
}

.top-5 {
    top: 5px;
}

.poster:before {
    background-image: url(https://images.unsplash.com/photo-1588182728399-e8f2df121744?ixid=M3wyMDkyMnwwfDF8c2VhcmNofDQ5fHxjaGluZXNlJTIwZm9vZHxlbnwwfHx8fDE3MjUzNjk5NTR8MA&ixlib=rb-4.0.3q=85&fm=jpg&crop=faces&cs=srgb&w=1200&fit=max) !important;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    content: ' ';
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    position: absolute;
}