/* ============================================================
   HESU — Contact Us page (vanilla JS, no dependencies)
   · inquiry form: client-side validation + success state
     (static site — no backend, form does not send anywhere yet)
   · scroll reveal is handled by js/main.js (unified)
   ============================================================ */
(function () {
  'use strict';

  var form = document.getElementById('ctForm');
  var note = document.getElementById('ctNote');
  if (!form || !note) return;

  form.addEventListener('submit', function (e) {
    e.preventDefault();

    if (!form.checkValidity()) {
      form.classList.add('was-validated');
      var bad = form.querySelector(':invalid');
      if (bad) bad.focus();
      note.textContent = 'Please fill in the required fields marked with *.';
      note.className = 'ct-note is-err';
      return;
    }

    form.classList.remove('was-validated');
    form.reset();
    note.textContent = 'Thank you for your inquiry. For a quicker response you can also reach us via TEL/WhatsApp: +8613526635577.';
    note.className = 'ct-note is-ok';
  });

  form.addEventListener('input', function () {
    if (note.textContent) { note.textContent = ''; note.className = 'ct-note'; }
  });
})();