.loading {
	position: fixed;
	top: 0;
	width: 100vw;
	height: 100vh;
	/* background-color: #dedede; */
	background: #fff;
	font-size: 12px;
}

.base {
	height: 9em;
	left: 50%;
	margin: -7.5em;
	padding: 3em;
	position: absolute;
	top: 50%;
	width: 9em;
	transform: rotateX(45deg) rotateZ(45deg);
	transform-style: preserve-3d;
}

.cube,
.cube:after,
.cube:before {
	content: '';
	float: left;
	height: 3em;
	position: absolute;
	width: 3em;
}

/* Top */
.cube {
	background-color: #ccc;
	position: relative;
	transform: translateZ(3em);
	transform-style: preserve-3d;
	transition: .25s;
	box-shadow: 13em 13em 1.5em rgba(0, 0, 0, 0.1);
	animation: anim 1s infinite;
}
.cube:after {
	background-color: #ccc;
	transform: rotateX(-90deg) translateY(3em);
	transform-origin: 100% 100%;
}
.cube:before {
	background-color: #000;
	transform: rotateY(90deg) translateX(3em);
	transform-origin: 100% 0;
}
.cube:nth-child(1) {animation-delay: 0.05s;}
.cube:nth-child(2) {animation-delay: 0.1s;}
.cube:nth-child(3) {animation-delay: 0.15s;}
.cube:nth-child(4) {animation-delay: 0.2s;}
.cube:nth-child(5) {animation-delay: 0.25s;}
.cube:nth-child(6) {
animation-delay: 0.3s;}
.cube:nth-child(7) {animation-delay: 0.35s;
}
.cube:nth-child(8) {animation-delay: 0.4s;}
.cube:nth-child(9) {animation-delay: 0.45s;}

@keyframes anim {
	50% {
		transform: translateZ(0.5em);
	}
}