body {
  margin: 0;
  background: #000;
  min-height: 800px;
  font-size: 16px;
  color: #fff; }

nav {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, 0);
  width: auto;
  text-align: center;
  z-index: 9999; }
  nav a {
    display: inline-block;
    color: inherit;
    text-decoration: none;
    margin: 0.5em; }
  nav a.loading {
    color: #ccc;
    pointer-events: none; }

nav.hold a {
  pointer-events: none !important; }

.planet {
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  width: 870px;
  height: 610px;
  background-repeat: no-repeat; }

.planet[out="0"][in="0"],
.planet[out="0"][in="1"],
.planet[out="1"][in="0"] {
  background-image: url("/source/img/01.png"); }

.planet[out="0"][in="2"],
.planet[out="2"][in="0"] {
  background-image: url("/source/img/02.png"); }

.planet[out="0"][in="3"],
.planet[out="3"][in="0"] {
  background-image: url("/source/img/03.png"); }

.planet[out="1"][in="2"],
.planet[out="2"][in="1"] {
  background-image: url("/source/img/12.png"); }

.planet[out="1"][in="3"],
.planet[out="3"][in="1"] {
  background-image: url("/source/img/13.png"); }

.planet[out="2"][in="3"],
.planet[out="3"][in="2"] {
  background-image: url("/source/img/23.png"); }

.planet[out="0"][in="0"],
.planet[out="0"][in="1"],
.planet[out="0"][in="2"],
.planet[out="0"][in="3"],
.planet[out="1"][in="2"],
.planet[out="1"][in="3"],
.planet[out="2"][in="3"] {
  background-position: top -20px left; }

.planet[out="1"][in="0"],
.planet[out="2"][in="0"],
.planet[out="2"][in="1"],
.planet[out="3"][in="0"],
.planet[out="3"][in="1"],
.planet[out="3"][in="2"] {
  background-position: top -11000px left; }

.planet[out="0"][in="1"].morph,
.planet[out="0"][in="2"].morph,
.planet[out="0"][in="3"].morph,
.planet[out="1"][in="2"].morph,
.planet[out="1"][in="3"].morph,
.planet[out="2"][in="3"].morph {
  animation: morphIn 1s steps(18, end) 1;
  background-position: top -11000px left; }

.planet[out="1"][in="0"].morph,
.planet[out="2"][in="0"].morph,
.planet[out="2"][in="1"].morph,
.planet[out="3"][in="0"].morph,
.planet[out="3"][in="1"].morph,
.planet[out="3"][in="2"].morph {
  animation: morphOut 1s steps(18, end) 1;
  background-position: top -20px left; }

@keyframes morphIn {
  0% {
    background-position: top -20px left; }
  100% {
    background-position: top -11000px left; } }
@keyframes morphOut {
  0% {
    background-position: top -11000px left; }
  100% {
    background-position: top -20px left; } }
.imgLoad {
  display: none; }