.buecherschrank {
  max-width: 1150px;
  margin: 10px auto 40px auto;
  text-align: center;
}

.schrank {
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 1150px;
}

.schrank-bg {
  width: 100%;
  height: auto;
  display: block;
}

/* Bücher allgemein */
.buch {
  position: absolute;
  transform: translate(-50%, -50%);
  display: block;
}

.buch img {
  width: 140px;
  height: auto;
  display: block;
}

/* Positionen */
.buch1 { left: 16%; top: 47%; }
.buch2 { left: 34%; top: 47%; }
.buch3 { left: 52%; top: 47%; }
.buch4 { left: 70%; top: 47%; }

/* Text unter den Büchern */
.buch-text {
  margin-top: 8px;
  color: white;
  font-weight: bold;
  text-align: center;
}

.schrank {
  position: relative;
  display: inline-block;
}

.buch {
  position: absolute;
  z-index: 10;
  display: block;
  transform: translate(-50%, -50%);
}

.buch img {
  width: 160px;
  height: 180px;
  display: block;
}

.buch1 { left: 10%; top: 50%; }
.buch2 { left: 30%; top: 50%; }
.buch3 { left: 50%; top: 50%; }
.buch4 { left: 70%; top: 50%; }