document.addEventListener("DOMContentLoaded", () => {
  const toggle = document.querySelector(".site-nav-toggle");
  const nav = document.querySelector(".site-nav");

  if (toggle && nav) {
    toggle.addEventListener("click", () => {
      const expanded = toggle.getAttribute("aria-expanded") === "true";
      toggle.setAttribute("aria-expanded", String(!expanded));
      nav.classList.toggle("is-open", !expanded);
    });
  }
});