body > header
{
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: #eee;
}

section:first-child
{
    padding-top: 3.75rem;
    background-color: #eee;
}

@media (max-width: 48rem) 
{
    section:first-child
    {
        padding-top: 52px;
    }
}

.scrolled-down 
{
    transform: translateY(-100%);
    transition: all 0.3s ease-in-out;
}

.scrolled-up 
{
    transform: translateY(0);
    transition: all 0.3s ease-in-out;
}