(function($) {
  
  "use strict";

  function updateNavbarSpacer() {
    var navbar = document.querySelector('.scrolling-navbar');
    var spacer = document.querySelector('.navbar-spacer');

    if (!navbar || !spacer) {
      return;
    }

    var height = Math.ceil(navbar.getBoundingClientRect().height);
    spacer.style.height = height + 'px';
    document.documentElement.style.setProperty('--site-header-height', height + 'px');
  }

  window.updateNavbarSpacer = updateNavbarSpacer;

  function initNavbarSpacer() {
    updateNavbarSpacer();

    var navbar = document.querySelector('.scrolling-navbar');
    if (navbar && typeof ResizeObserver !== 'undefined') {
      var resizeObserver = new ResizeObserver(updateNavbarSpacer);
      resizeObserver.observe(navbar);
    }

    var headerLogo = document.querySelector('[data-logo-placement="header"] [data-logo-image]');
    if (headerLogo) {
      if (headerLogo.complete) {
        updateNavbarSpacer();
      }
      headerLogo.addEventListener('load', updateNavbarSpacer);
    }
  }

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', initNavbarSpacer);
  } else {
    initNavbarSpacer();
  }

  $(window).on('load', function() {

  /*Page Loader active
    ========================================================*/
    $('#preloader').fadeOut();

    updateNavbarSpacer();

  // Sticky Nav
    $(window).on('scroll', function() {
        var wasCollapsed = $('.scrolling-navbar').hasClass('top-nav-collapse');

        if ($(window).scrollTop() > 200) {
            $('.scrolling-navbar').addClass('top-nav-collapse');
        } else {
            $('.scrolling-navbar').removeClass('top-nav-collapse');
        }

        if (wasCollapsed !== $('.scrolling-navbar').hasClass('top-nav-collapse')) {
          requestAnimationFrame(updateNavbarSpacer);
        }
    });

    $(window).on('resize', updateNavbarSpacer);

    if (document.documentElement.classList.contains('site-config-loaded')) {
      updateNavbarSpacer();
    } else {
      var configObserver = new MutationObserver(function() {
        if (document.documentElement.classList.contains('site-config-loaded')) {
          updateNavbarSpacer();
          configObserver.disconnect();
        }
      });
      configObserver.observe(document.documentElement, {
        attributes: true,
        attributeFilter: ['class']
      });
    }

    /* ==========================================================================
       countdown timer — initialized from site.json via site-config.js
       ========================================================================== */

    /* Auto Close Responsive Navbar on Click
    ========================================================*/
    function close_toggle() {
        if ($(window).width() <= 768) {
            $('.navbar-collapse a').on('click', function () {
                $('.navbar-collapse').collapse('hide');
            });
        }
        else {
            $('.navbar .navbar-inverse a').off('click');
        }
    }
    close_toggle();
    $(window).resize(close_toggle);

      /* WOW Scroll Spy
    ========================================================*/
     var wow = new WOW({
      //disabled for mobile
        mobile: false
    });
    wow.init();

    /* Nivo Lightbox 
    ========================================================*/
    $('.lightbox').nivoLightbox({
        effect: 'fadeScale',
        keyboardNav: true,
      });

    // one page navigation 
    $('.navbar-nav').onePageNav({
            currentClass: 'active'
    }); 

    /* Counter (static placeholders only; event stats are animated in site-config.js) */
    $('.counterUp').not('[data-event-stats-list] .counterUp').counterUp({
     delay: 10,
     time: 1500
    });

    /* Back Top Link active
    ========================================================*/
      var offset = 200;
      var duration = 500;
      $(window).scroll(function() {
        if ($(this).scrollTop() > offset) {
          $('.back-to-top').fadeIn(400);
        } else {
          $('.back-to-top').fadeOut(400);
        }
      });

      $('.back-to-top').on('click',function(event) {
        event.preventDefault();
        $('html, body').animate({
          scrollTop: 0
        }, 600);
        return false;
      });

  });      

}(jQuery));