header,main,footer{
    display: none;
}

body.pg-loaded header,
body.pg-loaded main,
body.pg-loaded footer{
    display: block;
}

.sk-cube-grid {
    width: 40px;
    height: 40px;
    margin: 30px auto;
}

.sk-cube-grid .sk-cube {
    width: 33%;
    height: 33%;
    background-color: white;
    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);
    } 
}