added reveal animation to all pages.

new front/js/main.js

@@ -539,4 +539,36 @@
       ticketForm.reset();
     });
   }
+
+  /* ---------- scroll reveal: sections fade/rise in, cards cascade after ---------- */
+  var reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+  if (!reduceMotion && 'IntersectionObserver' in window) {
+    var revealSections = Array.prototype.slice.call(document.querySelectorAll('#main > section'));
+    var cardSelector = '.dcard, .acard, .titem, .rcard, .quote, .statcard';
+    var groupCounts = new Map();
+
+    revealSections.forEach(function (section) {
+      section.classList.add('reveal');
+      Array.prototype.forEach.call(section.querySelectorAll(cardSelector), function (card) {
+        var group = card.parentElement;
+        var i = groupCounts.get(group) || 0;
+        groupCounts.set(group, i + 1);
+        card.classList.add('reveal-item');
+        card.style.animationDelay = (Math.min(i, 7) * 0.07) + 's';
+      });
+    });
+
+    var revealObserver = new IntersectionObserver(function (entries, obs) {
+      entries.forEach(function (entry) {
+        if (!entry.isIntersecting) return;
+        entry.target.classList.add('is-visible');
+        Array.prototype.forEach.call(entry.target.querySelectorAll('.reveal-item'), function (item) {
+          item.classList.add('is-visible');
+        });
+        obs.unobserve(entry.target);
+      });
+    }, { threshold: 0.15, rootMargin: '0px 0px -8% 0px' });
+
+    revealSections.forEach(function (section) { revealObserver.observe(section); });
+  }
 })();