.resizable-grid-container th {
  position: relative;
}

.resizable-grid-container th::after {
  content: "";
  position: absolute;
  top: 0;
  right: -3px;
  width: 6px;
  height: 100%;
  cursor: col-resize;
  z-index: 1;
}

.resizable-grid-container th:hover::after {
  background-color: rgba(0, 123, 255, 0.3);
}