Add hero carousel with 5 images, enlarge logo, fix Pathfinder references

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/main.js

@@ -1,9 +1,9 @@
-function loadHTML(file, elementId) {
+function loadHTML(file, elementId, callback) {
   fetch(file)
     .then(r => r.text())
     .then(html => {
       document.getElementById(elementId).innerHTML = html;
-      if (elementId === 'header') highlightActiveNav();
+      if (callback) callback();
     })
     .catch(err => console.error('Error loading:', file, err));
 }
@@ -17,5 +17,20 @@ function highlightActiveNav() {
   });
 }
 
-loadHTML('/header.html', 'header');
+function startCarousel() {
+  const slides = document.querySelectorAll('#hero-carousel .carousel-slide');
+  if (!slides.length) return;
+  let current = 0;
+  slides[current].style.opacity = '1';
+  setInterval(() => {
+    slides[current].style.opacity = '0';
+    current = (current + 1) % slides.length;
+    slides[current].style.opacity = '1';
+  }, 5000);
+}
+
+loadHTML('/header.html', 'header', () => {
+  highlightActiveNav();
+  startCarousel();
+});
 loadHTML('/footer.html', 'footer');