const scrollbox = document.querySelector(".scrollbox");
    const arrow = scrollbox.querySelector(".scrollbox::before");

    scrollbox.addEventListener("scroll", function() {
      if (scrollbox.scrollTop + scrollbox.clientHeight >= scrollbox.scrollHeight) {
        arrow.style.display = "none";
      } else {
        arrow.style.display = "block";
      }
    });

    const scrollbox = document.querySelector(".scrollbox");

    scrollbox.addEventListener("click", function() {
      scrollbox.classList.toggle("expanded");
    });