header{
    position: absolute;
    top: 0;
    width: 100%;
    z-index: 999;
    line-height: 1;
}
header.absolute{
    position: absolute;
    background-color: transparent;
}
header.fixed{
    position: fixed;
    background-color: #fff;
    box-shadow: 0px 0px 20px 0px rgba(0, 0, 0, 0.15);
    transition: background-color 0.5s;
}
header .content{
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
    max-width: var(--max-width);
    height: 100px;
}
.logo img{
    max-height: 50px;
    width: auto;
}
header .logo .dark-logo{
    display: none;
}
.custom-logo{
    display: block;
}
@media (max-width: 768px) {
    header .content{
        margin: 0 20px;
    }
}