document.addEventListener("DOMContentLoaded", () => {
  const header = document.querySelector(".main-header");
  const burger = document.getElementById("burgerBtn");
  const nav = document.getElementById("mainNav");

  // --- Burger-Menü ---
  if (burger && nav) {
    burger.addEventListener("click", () => {
      burger.classList.toggle("active");
      nav.classList.toggle("active");
    });
  }

  // --- Scrollverhalten ---
  if (header) {
    window.addEventListener("scroll", () => {
      if (window.scrollY > 40) {
        header.classList.add("scrolled");
      } else {
        header.classList.remove("scrolled");
      }
    });
  }
});