:root {
    --sk-size: 40px;
    --sk-color: #333
}

.sk-center {
    margin: auto
}

.sk-plane {
    width: var(--sk-size);
    height: var(--sk-size);
    background-color: var(--sk-color);
    animation: sk-plane 1.2s infinite ease-in-out
}

@keyframes sk-plane {
    0% {
        transform: perspective(120px) rotateX(0) rotateY(0)
    }

    50% {
        transform: perspective(120px) rotateX(-180.1deg) rotateY(0)
    }

    100% {
        transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg)
    }
}

.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: var(--sk-color);
    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)
    }
}

.sk-bounce {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative
}

.sk-bounce-dot {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: var(--sk-color);
    opacity: .6;
    position: absolute;
    top: 0;
    left: 0;
    animation: sk-bounce 2s infinite cubic-bezier(0.455,0.03,0.515,0.955)
}

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

@keyframes sk-bounce {
    0%,100% {
        transform: scale(0)
    }

    45%,55% {
        transform: scale(1)
    }
}

.sk-wave {
    width: var(--sk-size);
    height: var(--sk-size);
    display: flex;
    justify-content: space-between
}

.sk-wave-rect {
    background-color: var(--sk-color);
    height: 100%;
    width: 15%;
    animation: sk-wave 1.2s infinite ease-in-out
}

.sk-wave-rect:nth-child(1) {
    animation-delay: -1.2s
}

.sk-wave-rect:nth-child(2) {
    animation-delay: -1.1s
}

.sk-wave-rect:nth-child(3) {
    animation-delay: -1.0s
}

.sk-wave-rect:nth-child(4) {
    animation-delay: -0.9s
}

.sk-wave-rect:nth-child(5) {
    animation-delay: -0.8s
}

@keyframes sk-wave {
    0%,40%,100% {
        transform: scaleY(0.4)
    }

    20% {
        transform: scaleY(1)
    }
}

.sk-pulse {
    width: var(--sk-size);
    height: var(--sk-size);
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-pulse 1.2s infinite cubic-bezier(0.455,0.03,0.515,0.955)
}

@keyframes sk-pulse {
    0% {
        transform: scale(0)
    }

    100% {
        transform: scale(1);
        opacity: 0
    }
}

.sk-flow {
    width: calc(var(--sk-size) * 1.3);
    height: calc(var(--sk-size) * 1.3);
    display: flex;
    justify-content: space-between
}

.sk-flow-dot {
    width: 25%;
    height: 25%;
    background-color: var(--sk-color);
    border-radius: 50%;
    animation: sk-flow 1.4s cubic-bezier(0.455,0.03,0.515,0.955) 0s infinite both
}

.sk-flow-dot:nth-child(1) {
    animation-delay: -0.30s
}

.sk-flow-dot:nth-child(2) {
    animation-delay: -0.15s
}

@keyframes sk-flow {
    0%,80%,100% {
        transform: scale(0.3)
    }

    40% {
        transform: scale(1)
    }
}

.sk-swing {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
    animation: sk-swing 1.8s infinite linear
}

.sk-swing-dot {
    width: 45%;
    height: 45%;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    margin: auto;
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-swing-dot 2s infinite ease-in-out
}

.sk-swing-dot:nth-child(2) {
    top: auto;
    bottom: 0;
    animation-delay: -1s
}

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

@keyframes sk-swing-dot {
    0%,100% {
        transform: scale(0.2)
    }

    50% {
        transform: scale(1)
    }
}

.sk-circle {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative
}

.sk-circle-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0
}

.sk-circle-dot:before {
    content: '';
    display: block;
    width: 15%;
    height: 15%;
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-circle 1.2s infinite ease-in-out both
}

.sk-circle-dot:nth-child(1) {
    transform: rotate(30deg)
}

.sk-circle-dot:nth-child(2) {
    transform: rotate(60deg)
}

.sk-circle-dot:nth-child(3) {
    transform: rotate(90deg)
}

.sk-circle-dot:nth-child(4) {
    transform: rotate(120deg)
}

.sk-circle-dot:nth-child(5) {
    transform: rotate(150deg)
}

.sk-circle-dot:nth-child(6) {
    transform: rotate(180deg)
}

.sk-circle-dot:nth-child(7) {
    transform: rotate(210deg)
}

.sk-circle-dot:nth-child(8) {
    transform: rotate(240deg)
}

.sk-circle-dot:nth-child(9) {
    transform: rotate(270deg)
}

.sk-circle-dot:nth-child(10) {
    transform: rotate(300deg)
}

.sk-circle-dot:nth-child(11) {
    transform: rotate(330deg)
}

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

.sk-circle-dot:nth-child(2):before {
    animation-delay: -1s
}

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

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

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

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

.sk-circle-dot:nth-child(7):before {
    animation-delay: -0.5s
}

.sk-circle-dot:nth-child(8):before {
    animation-delay: -0.4s
}

.sk-circle-dot:nth-child(9):before {
    animation-delay: -0.3s
}

.sk-circle-dot:nth-child(10):before {
    animation-delay: -0.2s
}

.sk-circle-dot:nth-child(11):before {
    animation-delay: -0.1s
}

@keyframes sk-circle {
    0%,80%,100% {
        transform: scale(0)
    }

    40% {
        transform: scale(1)
    }
}

.sk-circle-fade {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative
}

.sk-circle-fade-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0
}

.sk-circle-fade-dot:before {
    content: '';
    display: block;
    width: 15%;
    height: 15%;
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-circle-fade 1.2s infinite ease-in-out both
}

.sk-circle-fade-dot:nth-child(1) {
    transform: rotate(30deg)
}

.sk-circle-fade-dot:nth-child(2) {
    transform: rotate(60deg)
}

.sk-circle-fade-dot:nth-child(3) {
    transform: rotate(90deg)
}

.sk-circle-fade-dot:nth-child(4) {
    transform: rotate(120deg)
}

.sk-circle-fade-dot:nth-child(5) {
    transform: rotate(150deg)
}

.sk-circle-fade-dot:nth-child(6) {
    transform: rotate(180deg)
}

.sk-circle-fade-dot:nth-child(7) {
    transform: rotate(210deg)
}

.sk-circle-fade-dot:nth-child(8) {
    transform: rotate(240deg)
}

.sk-circle-fade-dot:nth-child(9) {
    transform: rotate(270deg)
}

.sk-circle-fade-dot:nth-child(10) {
    transform: rotate(300deg)
}

.sk-circle-fade-dot:nth-child(11) {
    transform: rotate(330deg)
}

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

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

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

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

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

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

.sk-circle-fade-dot:nth-child(7):before {
    animation-delay: -0.5s
}

.sk-circle-fade-dot:nth-child(8):before {
    animation-delay: -0.4s
}

.sk-circle-fade-dot:nth-child(9):before {
    animation-delay: -0.3s
}

.sk-circle-fade-dot:nth-child(10):before {
    animation-delay: -0.2s
}

.sk-circle-fade-dot:nth-child(11):before {
    animation-delay: -0.1s
}

@keyframes sk-circle-fade {
    0%,39%,100% {
        opacity: 0;
        transform: scale(0.6)
    }

    40% {
        opacity: 1;
        transform: scale(1)
    }
}

.sk-grid {
    width: var(--sk-size);
    height: var(--sk-size)
}

.sk-grid-cube {
    width: 33.33%;
    height: 33.33%;
    background-color: var(--sk-color);
    float: left;
    animation: sk-grid 1.3s infinite ease-in-out
}

.sk-grid-cube:nth-child(1) {
    animation-delay: .2s
}

.sk-grid-cube:nth-child(2) {
    animation-delay: .3s
}

.sk-grid-cube:nth-child(3) {
    animation-delay: .4s
}

.sk-grid-cube:nth-child(4) {
    animation-delay: .1s
}

.sk-grid-cube:nth-child(5) {
    animation-delay: .2s
}

.sk-grid-cube:nth-child(6) {
    animation-delay: .3s
}

.sk-grid-cube:nth-child(7) {
    animation-delay: 0s
}

.sk-grid-cube:nth-child(8) {
    animation-delay: .1s
}

.sk-grid-cube:nth-child(9) {
    animation-delay: .2s
}

@keyframes sk-grid {
    0%,70%,100% {
        transform: scale3D(1,1,1)
    }

    35% {
        transform: scale3D(0,0,1)
    }
}

.sk-fold {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
    transform: rotateZ(45deg)
}

.sk-fold-cube {
    float: left;
    width: 50%;
    height: 50%;
    position: relative;
    transform: scale(1.1)
}

.sk-fold-cube:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--sk-color);
    animation: sk-fold 2.4s infinite linear both;
    transform-origin: 100% 100%
}

.sk-fold-cube:nth-child(2) {
    transform: scale(1.1) rotateZ(90deg)
}

.sk-fold-cube:nth-child(4) {
    transform: scale(1.1) rotateZ(180deg)
}

.sk-fold-cube:nth-child(3) {
    transform: scale(1.1) rotateZ(270deg)
}

.sk-fold-cube:nth-child(2):before {
    animation-delay: .3s
}

.sk-fold-cube:nth-child(4):before {
    animation-delay: .6s
}

.sk-fold-cube:nth-child(3):before {
    animation-delay: .9s
}

@keyframes sk-fold {
    0%,10% {
        transform: perspective(140px) rotateX(-180deg);
        opacity: 0
    }

    25%,75% {
        transform: perspective(140px) rotateX(0);
        opacity: 1
    }

    90%,100% {
        transform: perspective(140px) rotateY(180deg);
        opacity: 0
    }
}

.sk-wander {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative
}

.sk-wander-cube {
    background-color: var(--sk-color);
    width: 20%;
    height: 20%;
    position: absolute;
    top: 0;
    left: 0;
    --sk-wander-distance: calc(var(--sk-size) * 0.75);
    animation: sk-wander 2.0s ease-in-out -2.0s infinite both
}

.sk-wander-cube:nth-child(2) {
    animation-delay: -0.5s
}

.sk-wander-cube:nth-child(3) {
    animation-delay: -1.0s
}

@keyframes sk-wander {
    0% {
        transform: rotate(0)
    }

    25% {
        transform: translateX(var(--sk-wander-distance)) rotate(-90deg) scale(0.6)
    }

    50% {
        transform: translateX(var(--sk-wander-distance)) translateY(var(--sk-wander-distance)) rotate(-179deg)
    }

    50.1% {
        transform: translateX(var(--sk-wander-distance)) translateY(var(--sk-wander-distance)) rotate(-180deg)
    }

    75% {
        transform: translateX(0) translateY(var(--sk-wander-distance)) rotate(-270deg) scale(0.6)
    }

    100% {
        transform: rotate(-360deg)
    }
}