.tableHeader{
  position:sticky;
  top: 0 ;
}
.card-img-top {
  /* width: 20%; */
  height: 100px;
  object-fit: scale-down;
}

.node circle {
  fill: #fff;
  stroke: steelblue;
  stroke-width: 3px;
}

.node text {
  font: 12px sans-serif;
}

.link {
  fill: none;
  stroke: #ccc;
  stroke-width: 2px;
}