/* ซ่อนลูกศรเดิม */
.select2-loading .select2-selection__arrow {
  visibility: hidden;
}

/* ใส่ spinner แทนลูกศร */
.select2-loading .select2-selection__arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 10px;
  width: 16px;
  height: 16px;
  border: 2px solid #adb5bd;
  border-top-color: transparent;
  border-radius: 50%;
  animation: select2-spin 0.8s linear infinite;
  transform: translateY(-50%);
  visibility: visible;
}

/* spinner animation */
@keyframes select2-spin {
  to {
    transform: translateY(-50%) rotate(360deg);
  }
}