.hotspot-box {
  position: absolute;
}

.hotspot {
  width: 50px;
  height: 50px;
  border-radius: 25px;
  background: #d6d8cc;
  font-size: 25px;
  line-height: 50px;
  text-align: center;
}

.hotspot:hover {
  background: red;
}

.silverslide img {
  margin: auto;
}