.diagram-container {
  background: #333333;
  width: 100%;
  height: 100%;
}

.custom-node {
  border: solid 2px gray;
  border-radius: 5px;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  position: relative;
}

.custom-node-color {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  transform: translate(-50%, -50%);
  border-radius: 10px;
}

.circle-port {
  width: 12px;
  height: 12px;
  margin: 2px;
  border-radius: 4px;
  background: darkgray;
  cursor: pointer;
}

.circle-port:hover {
  background: mediumpurple;
}