body {
  font-family: Arial, sans-serif;
  font-size: medium;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

img {
  width: 300px;
  height: auto;
}

.zurueck-link {
  position: absolute;
  top: 10px;
  left: 10px;
  color: black;
  background-color: pink;
  text-decoration: none;
}