@keyframes blink {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

table.dataTable.dtr-inline.collapsed > tbody > tr > td.dtr-control:before,
table.dataTable.dtr-inline.collapsed > tbody > tr > th.dtr-control:before {
  margin-right: 0.5em;
  display: inline-block;
  color: rgba(3, 70, 255, 0.5);
  content: "►";
  font-size: 1.5em;
  animation: blink 1s infinite;
}
table.dataTable.dtr-inline.collapsed > tbody > tr > td.dtr-control.arrow-right::before,
table.dataTable.dtr-inline.collapsed > tbody > tr > th.dtr-control.arrow-right::before {
  content: "◄";
}
table.dataTable.dtr-inline.collapsed > tbody > tr.parent > td.dtr-control:before,
table.dataTable.dtr-inline.collapsed > tbody > tr.parent > th.dtr-control:before {
  content: "▼";
  animation: none;
}