* {
  margin: 0;
  padding: 0;
}

body {
  
}

.magnifier {
  width: 640px;
  margin: 50px auto;
  position: relative;
}

.magnifier:hover {
  cursor: none;
}

.large {
  width: 175px;
  height: 175px;
  position: absolute;
  border-radius: 100%;
  box-shadow: 0 0 0 7px rgba(191, 191, 191, 0.85),
    0 0 7px 7px rgba(0, 0, 0, 0.25),
    inset 0 0 40px 2px rgba(191, 191, 191, 0.25);
  background: url('https://www.tu-chemnitz.de/wirtschaft/bwl8/img/STS2017.jpg')
    no-repeat;
  display: none;
}

.small {
  display: block;
}