Nav bar Font change not working

Store Design
3

Hi @aurumlux ,

  1. Go to Online Store → Theme → Edit code.
  2. Open your theme.css / based.css file and paste the code in the bottom of the file.
    try this code if this code not working then provide your store URL please and if it is password protected, please share the password as well. Thanks
ul.list-menu.list-menu--inline li {
    margin: auto 10px !important;
    font-family: sans-serif !important;
}