body {
  font-family: monospace;
  font-size: 18px;
  line-height: 1.54;
}

#form {
  padding: 8px 16px;
}

strong {
  color: coolgrey;
  border: 1px solid orange;
}

.box {
  width: 200px;
  display: inline-block;
  margin-right: 100px;
}

@keyframes rotate {
  from { transform: rotateX(0); }
  to   { transform: rotateX(360deg); }
}

.block {
  padding: 16px 0;
  font-size: 22px;
  background-color: gold;
  width: 250px;
  text-align: center;
  margin: 75px;
  transform-style: preserve-3d;
  animation: rotate 10s linear 0s infinite reverse none;
}

.block > span {
  display: inline-block;
  transform: translateZ(50px);
  background-color: red;
  padding: 4px;
  color: #f1f1f1;
}