body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background-color: #F0F8FF;
  color: #333333;
}

h1, h2 {
  color: #006699;
}

.impressum {
  margin: 20px;
  padding: 20px;
  background-color: #FFFFFF;
  border: 1px solid #006699;
}

.link-zurueck {
  display: inline-block;
  margin-top: 20px;
  padding: 10px;
  border: 1px solid #006699;
  background-color: #006699;
  color: #FFFFFF;
  text-decoration: none;
  transition: all 0.3s ease-in-out;
}

.link-zurueck:hover {
  background-color: #FFFFFF;
  color: #006699;
}