(function($) {
 // Cache selectors
var lastId,
    topMenu = $(".main-nav"),
    topMenuHeight = topMenu.outerHeight()+15,
    // All list items
    menuItems = topMenu.find(".awsm-go-to"),
    // Anchors corresponding to menu items
    scrollItems = menuItems.map(function(){
      var item = $($(this).attr("href"));
      if (item.length) { return item; }
    });

// Bind to scroll
$(window).scroll(function(){
   // Get container scroll position
   var fromTop = $(this).scrollTop()+topMenuHeight;
   
   // Get id of current scroll item
   var cur = scrollItems.map(function(){
     if ($(this).offset().top < fromTop)
       return this;
   });
   // Get the id of the current element
   cur = cur[cur.length-1];
   var id = cur && cur.length ? cur[0].id : "";
   
   if (lastId !== id) {
       lastId = id;
       // Set/remove active class
       menuItems
         .parent().removeClass("active")
         .end().filter("[href='#"+id+"']").parent().addClass("active");
   }                   
});


$(document).ready(function(){
             $('.awsm-go-to').click(function(event) {
                 var $anchor = $(this);
                 $('html, body').stop().animate({
                     scrollTop: $($anchor.attr('href')).offset().top
                 }, 1000);
                 event.preventDefault();
                 if ($(window).width() < 830) {
                    $('.nav-toggle').removeClass('open');
                    $('.main-nav').slideUp();
                }
             });
             $('.nav-toggle').click(function(e){
                e.preventDefault();
                $(this).toggleClass('open');
                $('.main-nav').slideToggle();
             });
         });
})(jQuery);