#loading-wrapper {
    display: none;
    background-color: rgba(255, 255, 255, .5);

    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

#loading {
    width: 39px;
    height: 39px;
    position: absolute;
    top: calc(50% - 20px);
    left: calc(50% - 20px);
}

.sk-cube-grid {
    width: 39px;
    height: 39px;
    margin: 100px auto;
}

.sk-cube-grid .sk-cube {
    width: 33%;
    height: 33%;
    background-color: #333;
    float: left;
    -webkit-animation: sk-cubeGridScaleDelay 1.3s infinite ease-in-out;
    animation: sk-cubeGridScaleDelay 1.3s infinite ease-in-out;
}

.sk-cube-grid .sk-cube1 {
    -webkit-animation-delay: 0.2s;
    animation-delay: 0.2s;
}

.sk-cube-grid .sk-cube2 {
    -webkit-animation-delay: 0.3s;
    animation-delay: 0.3s;
}

.sk-cube-grid .sk-cube3 {
    -webkit-animation-delay: 0.4s;
    animation-delay: 0.4s;
}

.sk-cube-grid .sk-cube4 {
    -webkit-animation-delay: 0.1s;
    animation-delay: 0.1s;
}

.sk-cube-grid .sk-cube5 {
    -webkit-animation-delay: 0.2s;
    animation-delay: 0.2s;
}

.sk-cube-grid .sk-cube6 {
    -webkit-animation-delay: 0.3s;
    animation-delay: 0.3s;
}

.sk-cube-grid .sk-cube7 {
    -webkit-animation-delay: 0s;
    animation-delay: 0s;
}

.sk-cube-grid .sk-cube8 {
    -webkit-animation-delay: 0.1s;
    animation-delay: 0.1s;
}

.sk-cube-grid .sk-cube9 {
    -webkit-animation-delay: 0.2s;
    animation-delay: 0.2s;
}

@-webkit-keyframes sk-cubeGridScaleDelay {
    0%, 70%, 100% {
        -webkit-transform: scale3D(1, 1, 1);
        transform: scale3D(1, 1, 1);
    }
    35% {
        -webkit-transform: scale3D(0, 0, 1);
        transform: scale3D(0, 0, 1);
    }
}

@keyframes sk-cubeGridScaleDelay {
    0%, 70%, 100% {
        -webkit-transform: scale3D(1, 1, 1);
        transform: scale3D(1, 1, 1);
    }
    35% {
        -webkit-transform: scale3D(0, 0, 1);
        transform: scale3D(0, 0, 1);
    }
}