;
(function() {
    var scrollToTopBtn = $('#scroll-to-top');
    var sliderContainer = $('#slider-container');
    var toggleScrollToTopBtn = function() {
        if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
            sliderContainer.addClass('flex').removeClass('hidden');
        } else {
            sliderContainer.addClass('hidden').removeClass('flex');
        }
    };
    window.addEventListener('scroll', function() {
        toggleScrollToTopBtn();
    });
    scrollToTopBtn.on('click', function() {
        window.scrollTo({
            top: 0,
            behavior: 'smooth'
        });
    });
    toggleScrollToTopBtn();
})();