:root {
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--sk-size: 40px;
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--sk-color: #333;
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}
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body.theme--dark {
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--sk-color: rgb(169, 169, 179);
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}
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.sk-wrapper {
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display: flex;
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justify-content: center;
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padding: 24px 0;
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}
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.sk-fold {
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width: var(--sk-size);
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height: var(--sk-size);
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position: relative;
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transform: rotateZ(45deg);
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}
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.sk-fold-cube {
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float: left;
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width: 50%;
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height: 50%;
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position: relative;
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transform: scale(1.1);
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}
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.sk-fold-cube:before {
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content: '';
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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background-color: var(--sk-color);
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animation: sk-fold 2.4s infinite linear both;
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transform-origin: 100% 100%;
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}
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.sk-fold-cube:nth-child(2) {
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transform: scale(1.1) rotateZ(90deg);
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}
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.sk-fold-cube:nth-child(4) {
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transform: scale(1.1) rotateZ(180deg);
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}
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.sk-fold-cube:nth-child(3) {
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transform: scale(1.1) rotateZ(270deg);
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}
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.sk-fold-cube:nth-child(2):before {
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animation-delay: 0.3s;
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}
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.sk-fold-cube:nth-child(4):before {
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animation-delay: 0.6s;
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}
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.sk-fold-cube:nth-child(3):before {
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animation-delay: 0.9s;
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}
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@keyframes sk-fold {
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0%,
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10% {
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transform: perspective(140px) rotateX(-180deg);
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opacity: 0;
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}
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25%,
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75% {
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transform: perspective(140px) rotateX(0);
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opacity: 1;
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}
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90%,
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100% {
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transform: perspective(140px) rotateY(180deg);
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opacity: 0;
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}
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}
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