<script>
document.querySelectorAll("input, textarea").forEach(function(element) {
  element.addEventListener("focus", function() {
    this.closest(".form-group").classList.add("focused");
  });
  element.addEventListener("blur", function() {
    var inputValue = this.value;
    if (inputValue === "") {
      this.closest(".form-group").classList.remove("focused");
    }
  });
});
</script>