body {
  background: #411;
}

#underlay path,
#underlay circle {
  fill: none;
  stroke: #301;
}

#underlay .lit {
  fill: #28e;
  stroke: #28e;
}

#overlay path,
#overlay circle {
  fill: #613;
  stroke: #05f;
  stroke-opacity: 0;
}

#overlay .lit {
  fill: #27e;
  stroke-opacity: 1;
}