.kontakt-bg {
    margin-bottom: -50px;
}

.kontakt-bg:before {
    background-image: url(/img/background.jpg);
    background-position: left -50px;
    background-repeat: no-repeat;
    background-size: cover;
    content: " ";
    display: block;
    height: 100%;
    left: 0;
    opacity: .2;
    position: absolute;
    top: 0;
    width: 100%;
}

@media (min-width: 992px) {
    .kontakt-bg:before {
        background-position: top;
        opacity: 1
    }
}
