// ── Tag pill tooltips: tap toggle (touch devices only) ────────
(function () {
  // Hover-capable devices already get the tooltips via :hover
  if (window.matchMedia('(hover: hover)').matches) return;

  const pills = [...document.querySelectorAll('[data-tip]')];

  function closeAll() {
    pills.forEach(p => {
      p.classList.remove('tip-open');
      p.setAttribute('aria-expanded', 'false');
    });
  }

  pills.forEach(pill => {
    pill.setAttribute('tabindex', '0');
    pill.setAttribute('role', 'button');
    pill.setAttribute('aria-expanded', 'false');
    // Pseudo-element tooltips are invisible to screen readers
    pill.setAttribute('aria-description', pill.dataset.tip);

    pill.addEventListener('click', (e) => {
      e.stopPropagation();
      const wasOpen = pill.classList.contains('tip-open');
      closeAll();
      if (!wasOpen) {
        pill.classList.add('tip-open');
        pill.setAttribute('aria-expanded', 'true');
      }
    });
    pill.addEventListener('keydown', (e) => {
      if (e.key === 'Enter' || e.key === ' ') {
        e.preventDefault();
        pill.click();
      }
    });
  });

  document.addEventListener('click', closeAll);
  document.addEventListener('keydown', (e) => {
    if (e.key === 'Escape') closeAll();
  });
})();