/* Scroll-triggered reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 500ms ease-out, transform 600ms ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* CSS-only parallax */
.parallax-container {
  perspective: 1px;
  overflow-y: auto;
}

.parallax-slow {
  transform: translateZ(-1px) scale(2);
}

const observer = new IntersectionObserver(
  (entries) => {
    entries.forEach(entry => {
      if (entry.isIntersecting) {
        entry.target.classList.add('visible');
      }
    });
  },
  { threshold: 0.2, rootMargin: '0px 0px -10% 0px' }
);

document.querySelectorAll('.reveal').forEach(el => observer.observe(el));

@keyframes reveal {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.scroll-reveal {
  animation: reveal linear both;
  animation-timeline: view();
  animation-range: entry 0% entry 50%;
}