first commit

static/js/main.js

@@ -0,0 +1,20 @@
+document.addEventListener("DOMContentLoaded", () => {
+    const header = document.querySelector(".site-header");
+
+    if (header) {
+        const updateHeader = () => {
+            header.classList.toggle("is-scrolled", window.scrollY > 24);
+        };
+
+        updateHeader();
+        window.addEventListener("scroll", updateHeader, { passive: true });
+    }
+
+    document.querySelectorAll("form[data-confirm]").forEach((form) => {
+        form.addEventListener("submit", (event) => {
+            if (!window.confirm(form.dataset.confirm)) {
+                event.preventDefault();
+            }
+        });
+    });
+});