body {
    padding-top: 160px;
}
body.scroll .logo {
    max-width: 90px;
}
header {
    z-index: 0;
}
body.scroll header {
    z-index: 3;
}

.lang > span + span {
    margin-left: 20px;
}

@media (min-width: 768px) {
    header .logo {
        position: static;
        padding-top: 30px;
    }
    body.scroll .logo {
        max-width: 110px;
    }
}
@media (min-width: 992px) {
    body {
        padding-top: 220px;
    }
    body.scroll .logo {
        max-width: 170px;
    }
    header .logo {
        padding-right: 45px;
        padding-top: 55px;
    }
    header {
        transition: background .4s ease;
        background: transparent;
    }
    body.scroll header {
        background: #fff;
    }
    .lang {
        top: 40px;
    }
    article {
        position: relative;
        top: -100px;
    }
}