.loader-wrapper {
    position: absolute;
    text-align: center;
    z-index: 1000;
    display: none;
}

    .loader-wrapper > .loader {
        display: block;
        position: relative;
        left: 50%;
        top: 50%;
        width: 100px;
        height: 100px;
        margin: -50px 0 0 -50px;
        border-radius: 50%;
        border: 5px solid transparent;
        border-top-color: #3498db;
        -webkit-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */
        animation: spin 2s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
    }

        .loader-wrapper > .loader:before {
            content: "";
            position: absolute;
            top: 5px;
            left: 5px;
            right: 5px;
            bottom: 5px;
            border-radius: 50%;
            border: 5px solid transparent;
            border-top-color: #e74c3c;
            -webkit-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */
            animation: spin 3s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
        }

        .loader-wrapper > .loader:after {
            content: "";
            position: absolute;
            top: 15px;
            left: 15px;
            right: 15px;
            bottom: 15px;
            border-radius: 50%;
            border: 5px solid transparent;
            border-top-color: #f9c922;
            -webkit-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */
            animation: spin 1.5s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
        }

@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg); /* Chrome, Opera 15+, Safari 3.1+ */
        -ms-transform: rotate(0deg); /* IE 9 */
        transform: rotate(0deg); /* Firefox 16+, IE 10+, Opera */
    }

    100% {
        -webkit-transform: rotate(360deg); /* Chrome, Opera 15+, Safari 3.1+ */
        -ms-transform: rotate(360deg); /* IE 9 */
        transform: rotate(360deg); /* Firefox 16+, IE 10+, Opera */
    }
}

@keyframes spin {
    0% {
        -webkit-transform: rotate(0deg); /* Chrome, Opera 15+, Safari 3.1+ */
        -ms-transform: rotate(0deg); /* IE 9 */
        transform: rotate(0deg); /* Firefox 16+, IE 10+, Opera */
    }

    100% {
        -webkit-transform: rotate(360deg); /* Chrome, Opera 15+, Safari 3.1+ */
        -ms-transform: rotate(360deg); /* IE 9 */
        transform: rotate(360deg); /* Firefox 16+, IE 10+, Opera */
    }
}

.blurring {
    -webkit-filter: blur(0.2px);
    -moz-filter: blur(0.2px);
    -o-filter: blur(0.2px);
    -ms-filter: blur(0.2px);
    filter: blur(0.25px) grayscale(80%);
}