const preload_container=$("#preloader");$(window).on('load',function(){"use strict";preload_container.delay(750).fadeOut('slow');refresh_margin_top();$('.lazy').Lazy({scrollDirection:'vertical',})});setTimeout(()=>{preload_container.delay(750).fadeOut('slow')},1500);(function pulse(back){const img_el=preload_container.find('img');img_el.animate({'font-size':(back)?'100px':'140px',opacity:(back)?1:0.5},700,function(){pulse(!back)})})(!1);const btn_scroll=$('#back-to-top');$(window).scroll(function(){const p=$(window).scrollTop();if(p>=100)btn_scroll.parent().fadeIn();else btn_scroll.parent().fadeOut();const d_height=$(document).height()-$(window).height();refresh_margin_top()});btn_scroll.click(()=>{$("html, body").animate({scrollTop:0},"slow")})
function refresh_margin_top(){$('.content-wrapper').css('margin-top',$('header').height()+'px')}