body {
  background-color: #f8f9fa;
}

#itemList {
  list-style: none;
  margin: 0;
  padding: 0;
}

.item-parent {
  border: 1px solid rgba(13, 110, 253, 0.2);
  border-radius: 0.75rem;
  padding: 1rem;
  background-color: #fff;
  margin-bottom: 0.75rem;
}

.item-toggle {
  font-size: 1rem;
  font-weight: 600;
  color: #0d6efd;
  text-decoration: none;
  justify-content: space-between;
}

.item-toggle:hover, .item-toggle:focus-visible {
  text-decoration: none;
}

.subitems {
  margin-top: 0.5rem;
  display: none;
  padding-left: 1rem;
  font-size: 0.95rem;
  color: #495057;
}

.item-parent.open .subitems {
  display: block;
}

.subitems li + li {
  margin-top: 0.25rem;
}

.indicator {
  transition: transform 0.2s ease;
  font-size: 1.25rem;
  line-height: 1;
}

.item-parent.open .indicator {
  transform: rotate(45deg);
}