input[readonly] {
  background-color: #e9ecef !important; /* abu-abu Bootstrap */
  color: #6c757d;
  cursor: default;
}

input[readonly]:focus {
  background-color: #e9ecef !important; /* tetap abu-abu */
  box-shadow: none; /* hilangkan border glow */
  border-color: #ced4da; /* warna border default */
}