Custom CSS not working for bolding navigation links in header

Site URL: http://www.barbalunga.com

Hi,

I am trying to at least bold the navigation link text if I can't make them each different colors.

I tried this, but it is not working, any suggestions?  Or is custom CSS broken?

a.Header-nav-item { font-weight: bold; important}

I also tried:

a.Header-nav-item {
    font-weight: bold;
}

Use this code

div.header-nav-item a {
    font-weight: bold;
}
div.header-menu-nav-item a {
    font-weight: bold;
}

Ah, thank you!! That worked.