(function(){
  const burger=document.querySelector('.burger');
  const nav=document.querySelector('.nav');
  if(burger&&nav){burger.addEventListener('click',()=>{nav.classList.toggle('open');burger.setAttribute('aria-expanded',nav.classList.contains('open')?'true':'false')})}
  document.querySelectorAll('[data-filter]').forEach(btn=>{
    btn.addEventListener('click',()=>{
      const group=btn.closest('[data-filter-group]');
      if(!group)return;
      group.querySelectorAll('[data-filter]').forEach(b=>b.classList.remove('active'));
      btn.classList.add('active');
      const value=btn.dataset.filter;
      document.querySelectorAll('[data-status]').forEach(card=>{card.style.display=(value==='all'||card.dataset.status===value)?'':'none'});
    });
  });
})();