body {
  background-color: rgb(36, 37, 38);
  color: white;
}

#svg-area {
  display: block;
  position: fixed;
  margin: 0px;
  padding: 0px;
  border: 1px solid rgba(100, 100, 100, 0.5);
}

#lens {
  fill: none;
  stroke: url(#lens-gradion);
  stroke-opacity: 0.3;
  stroke-width: 10;
}
.crontol-lens {
  fill: url(#control-gradion);
  fill-opacity: 0.3;
  stroke: none;
}
.stop0 {
  stop-color: rgb(40, 40, 100);
}
.stop1 {
  stop-color: rgb(200, 200, 255);
}
.stop2 {
  stop-color: rgb(150, 150, 200);
}
.stop3 {
  stop-color: rgb(40, 40, 100);
}