body { background-color: black; }

#loadingDiv {
  box-sizing: border-box;
  font-family: "Open Sans", sans-serif;
  font-size: 1.4rem;
  color: lightsteelblue;
  text-align: center;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.scene {
  width: 200px;
  height: 200px;
  margin: auto;
  perspective: 200px;
}

.cube {
  width: 40px;
  height: 40px;
  position: relative;
  transform-style: preserve-3d;
  transform: translateZ(20px);
  left: 80px;
  top: 80px;
}

.cube.is-spinning {
  animation: spinCube 5s infinite ease-in-out;
}

@keyframes spinCube {
    0% { transform: translateZ(20px) rotateX(  0deg) rotateY(  0deg); }
  100% { transform: translateZ(20px) rotateX(360deg) rotateY(360deg); }
}

.face {
  position: absolute;
  width: 40px;
  height: 40px;
  padding: 0;
  background: hsla(240, 100%, 0%, 0.4);
  border: 1px solid hsla(240, 100%, 70%, 0.6);
}

.front  { transform: rotateY(  0deg) translateZ(20px); }
.right  { transform: rotateY( 90deg) translateZ(20px); }
.back   { transform: rotateY(180deg) translateZ(20px); }
.left   { transform: rotateY(-90deg) translateZ(20px); }
.top    { transform: rotateX( 90deg) translateZ(20px); }
.bottom { transform: rotateX(-90deg) translateZ(20px); }

.cube.is-backface-hidden .face {
  backface-visibility: hidden;
}

.mino0 { left: -40px; top: -20px; }
.mino1 { left:   0px; top: -20px; }
.mino2 { left:  40px; top: -20px; }
.mino3 { left:   0px; top:  20px; }