script.js

// Single scroll treatment: elements marked .reveal fade and rise into place.
// Fully disabled when the user prefers reduced motion.

(function () {
  var reduced = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
  var items = document.querySelectorAll(".reveal");

  if (reduced || !("IntersectionObserver" in window)) {
    items.forEach(function (el) { el.classList.add("is-visible"); });
    return;
  }

  document.documentElement.classList.add("js-reveal");

  var observer = new IntersectionObserver(
    function (entries) {
      entries.forEach(function (entry) {
        if (entry.isIntersecting) {
          entry.target.classList.add("is-visible");
          observer.unobserve(entry.target);
        }
      });
    },
    { threshold: 0.12 }
  );

  items.forEach(function (el) { observer.observe(el); });
})();