document.addEventListener('DOMContentLoaded', function() {
  // Solution cards - open with toggle button
  document.querySelectorAll('.solution-toggle').forEach(function(btn) {
    btn.addEventListener('click', function() {
      this.closest('.solution-card').classList.add('open');
    });
  });

  // Solution cards - close with X button
  document.querySelectorAll('.solution-close').forEach(function(btn) {
    btn.addEventListener('click', function() {
      this.closest('.solution-card').classList.remove('open');
    });
  });
});