header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: 0.6s;
    padding: 20px 80px;
    height: 70px;
    background-color: #00c2cb;
    z-index: 999;
}

header.sticky {
    height: 40px;
    background-color: #797979;
    padding: 5px 80px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.logo {
    position: relative;
    height: 2em;
    pointer-events: none;
    transition: 0.6s;
}

header ul {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

header ul li {
    position: relative;
    list-style: none;
}

header ul li a{
    display: block;
    position: relative;
    text-decoration: none;
    color: #fff;
    padding: 6px 15px;
    margin: 0 10px;
    font-weight: 700px;
    transform: 0.6s;
}

.navigation a:hover,
.navigation a.active {
    background-color: #fff;
    color: #00c2cb;
}


header.sticky .logo {
    height: 1.5em;
}
header.sticky ul li a {
    color: #fff;
}
header.sticky ul li a:hover {
    background-color: #fff;
    color: #00c2cb;
}