.pre-loader {
            position: fixed;
            height: 100%;
            width: 100%;
            display: flex;
            align-content: center;
            justify-content: center;
            align-self: center;
            top: 0;
            bottom: 0;
            left: 0;
            right: 0;
        }
        
        .sk-cube-grid {
            bottom: 0;
            height: 40px;
            left: 0;
            margin: auto;
            position: absolute;
            right: 0;
            top: 0;
            width: 40px;
        }
        
        .sk-cube-grid .sk-cube {
            width: 33%;
            height: 33%;
            background: #673ab7;
            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);
            }
        }