const headerMob=document.querySelector('.header');const navBtn=document.querySelector('.mobile-nav-btn');const mobileNav=document.querySelector('.mobile-menu');const body=document.querySelector('body');navBtn.addEventListener('click',function(){navBtn.classList.toggle('mobile-nav-btn--close');mobileNav.classList.toggle('mobile-menu--active');headerMob.classList.toggle('header--fixed')});const filterBtn=document.querySelector('.open-filter');const mobileFilter=document.querySelector('.mobile-filter');filterBtn.addEventListener('click',function(){mobileFilter.classList.toggle('mobile-filter--active')});