#site_header.up {
opacity: .8;
transition: opacity .3s ease-in-out;
}
#site_header.down {
opacity:.8;
transition: opacity .3s ease-in-out;
}
#site_header.up:has(.open),
#site_header.down:has(.open) {
opacity: 1;
} #site_header.up:hover,
#site_header.down:hover,
#site_header:hover {
opacity: 1;
transition: opacity .3s ease-in-out;
}