script.js

const observer = new IntersectionObserver((entries) => {
  entries.forEach((entry, i) => {
    if (entry.isIntersecting) {
      setTimeout(() => {
        entry.target.classList.add('visible');
      }, 80 * i);
      observer.unobserve(entry.target);
    }
  });
}, { threshold: 0.12 });

document.querySelectorAll('.fade-up').forEach(el => observer.observe(el));

function handleSubmit(e) {
  e.preventDefault();
  const btn = e.target.querySelector('.form-submit');
  btn.textContent = 'Terkirim! ✓';
  btn.style.background = '#8A9E7F';
  btn.disabled = true;
  setTimeout(() => {
    btn.textContent = 'Kirim Pesan →';
    btn.style.background = '';
    btn.disabled = false;
    e.target.reset();
  }, 3000);
}