header {
    max-width:100vw;    
    height: 100px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #000;
}
.logo {
    width: 100px;   
    height: inherit;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo .logo-img {
    width: 80px;
    height: 80px;
    background-color: var(--primary-color);
    border-radius: 50%;
}

.menu {
    display: block;
}

.menu ul, .menu li {
   list-style: none;
   
}

.menu-opener {
    display: none;
}

.menu ul {
    display: flex;
}

.menu li a {
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    padding-right: 8px;
    padding-left: 8px;    
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: space-around;
    border-bottom: 5px solid #000;
    transition: border 400ms;
}

.menu li a:hover, .menu .active a {
    color: #ccc;
   border-bottom: 5px solid var(--primary-color);   
}