.circleDiv {
  width: 400px;
  height: 400px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.circleDiv::before {
  content: "";
  height: 360px;
  width: 360px;
  background: linear-gradient(#13ecff 0%, #1284f7 100%);
  border-radius: 50%;
  filter: blur(6px);
}