.loading-wrapper { background-color: rgba(0,0,0,0.8); position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 999999; display: none; }
.loading-outer { display: table; width: 100%; height: 100%; }
.loading-inner { display: table-cell; vertical-align: middle; }

.loader {
    width: 150px;
    height: 150px;
    line-height: 150px;
    margin: 100px auto;
    position: relative;
    box-sizing: border-box;
    text-align: center;
    z-index: 0;
    text-transform: uppercase;
}

.loader:before,
.loader:after {
    opacity: 0;
    box-sizing: border-box;
    content: "\0020";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 100px;
    border: 5px solid #fff;
    box-shadow: 0 0 50px #fff, inset 0 0 50px #fff;
}

.loader:after {
    z-index: 1;
    -webkit-animation: gogoloader 2s infinite 1s;
}

.loader:before {
    z-index: 2;
    -webkit-animation: gogoloader 2s infinite;
}

@-webkit-keyframes gogoloader {
    0% {
        -webkit-transform: scale(0);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        -webkit-transform: scale(1);
        opacity: 0;
    }
}