body {
  font: 22px Arial;
  background-color: #5E412F;
}

.container {
  border: 3px solid #DE593A;
  position: relative;
  margin: .5em auto;
}

div {
  color: #FCEBB6;
  padding: 1em;
  width: 10em;
  opacity: .7;
}

.z-2 {
  background-color: #78C0A8;
  position: absolute;
  z-index: 2;
  margin: 6em 0 0 8em;
}

.no-z {
  background-color: #F07818;
}

.z-3 {
  background-color: #F0A830;
  position: fixed;
  z-index: 3;
}

.no-z-2 {
  background-color: #DE4D4E;
}

.child-of-no-z {
  background-color: #6E9ECF;
}