header {
    width: 100%;
    height: 100px;
    position: fixed;
    top: 0;
    left: 0;
    border-bottom: 1px solid rgba(119, 119, 119, .3);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    -webkit-transition: 0.5s;
    -moz-transition: 0.5s;
    -o-transition: 0.5s;
    transition: 0.5s;
}

.hidden {
    opacity: 0;
}

.visible {
    opacity: 1;
}

.nav-top {
    background-color: transparent;
}

.nav-scroll {
    background-color: var(--color4);
}

header #logo {
    margin: 20px;
    float: left;
    width: 203px;
    height: 31px;
    background-position: center;
    background-size: contain;
    background-repeat: no-repeat;
    display: block;
}

.nav-top #logo {
    background-image: url(../img/logo-n@2x.png);
}

.nav-scroll #logo {
    background-image: url(../img/logo@2x.png);
}

nav {
    float: right;
    padding: 20px;
}

#menu-icon,
#menu-icon-close {
    padding: 20px;
    display: none;
}

.nav-top #menu-icon div,
.nav-top #menu-icon-close div {
    width: 20px;
    height: 2px;
    background-color: var(--color4);
    margin: 4px 0;
}

.nav-scroll #menu-icon div,
.nav-scroll #menu-icon-close div {
    width: 20px;
    height: 2px;
    background-color: var(--color1);
    margin: 4px 0;
}

:hover#menu-icon div,
:hover#menu-icon-close div {
    background-color: var(--color2);
}

nav ul {
    list-style: none;
}

nav li {
    display: inline-block;
    padding: 10px
}

.nav-top li a {
    text-decoration: none;
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 500;
    text-transform: uppercase;
    color: var(--color4);
}

.nav-scroll li a {
    text-decoration: none;
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 500;
    text-transform: uppercase;
    color: var(--color1);
}

nav li a:hover {
    color: var(--color2);
}

nav li a.current {
    color: var(--color2);
}

.nav-top li a.jazyk {
    background-color: var(--color4);
    padding: 10px 20px;
    border-radius: 3px;
    color: var(--color1) !important;
}

.nav-scroll li a.jazyk {
    background-color: var(--color1);
    padding: 10px 20px;
    border-radius: 3px;
    color: var(--color4) !important;
}

.nav-top li a.jazyk:hover, .nav-scroll li a.jazyk:hover {
    background-color: var(--color2);
    color: var(--color4) !important;
}

@media only screen and (max-width: 767px) {
    header {
        position: fixed;
        height: 60px;
    }
    #menu-icon {
        display: inline-block;
    }
    .nav-top li a {
        text-decoration: none;
        font-family: 'Barlow Condensed', sans-serif;
        font-weight: 500;
        text-transform: uppercase;
        color: var(--color1);
    }
    nav ul,
    nav:active ul {
        display: none;
        position: absolute;
        padding: 20px 0;
        background: #fff;
        right: 0px;
        top: 45px;
        width: 100%;
    }
    nav {
        padding-right: 0;
    }
    nav li {
        text-align: center;
        width: 100%;
        padding: 20px 0;
        margin: 0;
    }

    .nav-top li a.jazyk {
        background-color: var(--color1);
        padding: 10px 20px;
        border-radius: 3px;
        color: var(--color4) !important;
    }
    
}