:root {
	--sk-size: 50px;
	--sk-color: #333;
}

.sk-center {
	position: fixed;
	z-index: 999;
	height: 2em;
	width: 2em;
	overflow: visible;
	margin: auto;
	top: 0;
	left: 0;
	bottom: 0;
	right: 0;
}

.sk-center:before {
	content: '';
	display: block;
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(0, 0, 0, 0.3);
}

.sk-chase {
	width: var(--sk-size);
	height: var(--sk-size);
	position: relative;
	animation: sk-chase 2.5s infinite linear both;
}

.sk-chase-dot {
	width: 100%;
	height: 100%;
	position: absolute;
	left: 0;
	top: 0;
	animation: sk-chase-dot 2.0s infinite ease-in-out both;
}

.sk-chase-dot:before {
	content: '';
	display: block;
	width: 25%;
	height: 25%;
	background-color: #ffcb05;
	border-radius: 100%;
	animation: sk-chase-dot-before 2.0s infinite ease-in-out both;
}

.sk-chase-dot:nth-child(1) {
	animation-delay: -1.1s;
}

.sk-chase-dot:nth-child(2) {
	animation-delay: -1.0s;
}

.sk-chase-dot:nth-child(3) {
	animation-delay: -0.9s;
}

.sk-chase-dot:nth-child(4) {
	animation-delay: -0.8s;
}

.sk-chase-dot:nth-child(5) {
	animation-delay: -0.7s;
}

.sk-chase-dot:nth-child(6) {
	animation-delay: -0.6s;
}

.sk-chase-dot:nth-child(1):before {
	animation-delay: -1.1s;
}

.sk-chase-dot:nth-child(2):before {
	animation-delay: -1.0s;
}

.sk-chase-dot:nth-child(3):before {
	animation-delay: -0.9s;
}

.sk-chase-dot:nth-child(4):before {
	animation-delay: -0.8s;
}

.sk-chase-dot:nth-child(5):before {
	animation-delay: -0.7s;
}

.sk-chase-dot:nth-child(6):before {
	animation-delay: -0.6s;
}

@keyframes sk-chase {
	100% {
		transform: rotate(360deg);
	}
}

@keyframes sk-chase-dot {

	80%,
	100% {
		transform: rotate(360deg);
	}
}

@keyframes sk-chase-dot-before {
	50% {
		transform: scale(0.4);
	}

	100%,
	0% {
		transform: scale(1.0);
	}
}