Last Item on Menu a Button - Folder?

Site URL: https://www.cupsmission.com

Hi everyone, on my website my last PAGE menu item has a button, but not the actual last item on my navigation-which is a folder. Here's the code I'm currently using:

.Header-nav a:nth-child(6) {
  background: white;
  padding-top: 10px !important;
  padding-bottom: 10px !important;
  padding-left: 15px !important;
  padding-right: 15px !important;
  color: rgb(3, 46, 124) !important;
}

a.Header-nav-item:last-of-type {
    background: #ffffff;
    color: #243877!important;
    padding: 11px 9px!important;
}
a.Header-nav-item:last-of-type:hover {
    background: #f3f3f3;
    color: #333!important;
}