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