header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

nav.skip {
    position: absolute;
    left    : -99999px;
}

.logo {
    width: 50px;
    height: 50px;
    margin-right: 100px;
}

.logo img {
    width: 50px;
    height: 50px;
}

.scrollbar button {
    border: none;
}

.navbar, .scrollbar, .header-left {
    display: flex;
}

.navbar a, .scrollbar button {
    cursor: pointer;
    margin-left: 5px;
    margin-right: 5px;
    padding: 10px;
    padding-top: 14px;
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 1rem;
    transition: color 100ms ease-in-out;
}

.navbar a::after, .scrollbar button::after {
    display:block;
    content: '';
    border-bottom: solid 3px var(--primary-color);  
    transform: scaleX(0);  
    transition: transform 100ms ease-in-out;
}

.navbar a:hover, .scrollbar button:hover {
    color: var(--primary-color);
}

.navbar a:hover::after, .scrollbar button:hover::after {
    transform: scaleX(1);
}

.navbar .current {
    color: var(--primary-color);
}

.navbar .current::after {
    transform: scaleX(1);
}

.top-header {
    position: fixed;
    width: 100%;
    z-index: 5;
    background-color: white;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.5);
}

.top-header .container {
    padding-top: 12px;
    padding-bottom: 12px;
}

@media (max-width: 600px) {
    .top-header .container {
        padding-top: 6px;
        padding-bottom: 6px;
    }

    .logo {
        width: 30px;
        height: 30px;
    }

    .logo img {
        width: 30px;
        height: 30px;
    }

    .navbar a {
        margin-left: 10px;
        margin-right: 10px;
        padding: 0;
    }
}