switched theme

static/js/scroll-top.js

@@ -0,0 +1,34 @@
+document.addEventListener('DOMContentLoaded', () => {
+  const scrollToTopBtn = document.getElementById('scroll-to-top');
+
+  if (!scrollToTopBtn) return;
+
+  // Show button when scrolled down 400px
+  const toggleVisibility = () => {
+    if (window.scrollY > 400) {
+      scrollToTopBtn.classList.add('visible');
+    } else {
+      scrollToTopBtn.classList.remove('visible');
+    }
+  };
+
+  // Smooth scroll to top when clicked
+  scrollToTopBtn.addEventListener('click', () => {
+    window.scrollTo({
+      top: 0,
+      behavior: 'smooth',
+    });
+  });
+
+  // Throttle the scroll event listener a tiny bit for performance
+  let isTicking = false;
+  window.addEventListener('scroll', () => {
+    if (!isTicking) {
+      window.requestAnimationFrame(() => {
+        toggleVisibility();
+        isTicking = false;
+      });
+      isTicking = true;
+    }
+  });
+});