.node {
  border: solid 2px white;
  position: absolute;
}

.group_l1 {
  pointer-events: none;
  position: absolute;
  opacity: 0.99;
  display: flex;
  justify-content: center; /* align horizontal */
  align-items: center; /* align vertical */
}

.group_l1 span {
  background-color: rgba(255, 255, 255, 0.5);
  text-align: center;
  font-weight: bold;
}

.hover {
  position: absolute;
  width: auto;
  height: auto;
  padding: 10px;
  background-color: white;
  -webkit-border-radius: 10px;
  -moz-border-radius: 10px;
  border-radius: 10px;
  -webkit-box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.4);
  -moz-box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.4);
  box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.4);
}