Vulcan/packages/telescope-pages/lib/client/stylesheets/pages.scss

@function white($opacity){
  @return rgba(255,255,255,$opacity);
}

.mobile-nav{
  .pages-menu{
    a{
      border-bottom:1px white(0.2) solid;
      margin: 0;
      &:last-of-type{
        border: none;
      }
    }
  }
}

.top-nav{
  .desktop-nav{
    .pages-menu{
      a{
        font-weight: normal;
        margin-right: 20px;
        &:last-of-type{
          margin: 0;
        }
      } 
    }
  }
}