#kuchen-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: auto;
  max-width: 50%;
}

img.kuchen-hintergrund {
  position: relative;
  max-width: 100%;
  opacity: 0.4;
}

img.kuchen-vordergrund {
  position: relative;
}

#streak {
  position: relative;
}

.klassen-navigation {
  list-style-type: none;
  margin: auto;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

ul.klassen-navigation li {
  display: block;
  padding: 14px 16px;
  text-decoration: none;
}

ul li:hover {
  background-color: #111111;
}