.circumference {
  fill: #fff;
  stroke: #f2f2f2;
  stroke-width: 5px;
}

.dot circle:hover {
  cursor: pointer;
}

.dot circle {
  fill: lightsteelblue;
  stroke: steelblue;
  stroke-width: 1.5px;
}

.dot circle.dragging {
  fill: red;
  stroke: brown;
}