#preloader {
    position: fixed;
    top: 0;
    left: 0;
    background: #000;
    width: 100%;
    height: 100%;
    z-index: 9999;
    opacity: 0.4;
    display: none;
}

    #preloader #preloader-inner {
        display: block;
        position: relative;
        left: 50%;
        top: 50%;
        width: 150px;
        height: 150px;
        margin: -75px 0 0 -75px;
        border-radius: 50%;
        border: 3px solid transparent;
        border-top-color: #3498db;
        -webkit-animation: spin 2s linear infinite;
        animation: spin 2s linear infinite;
    }

        #preloader #preloader-inner:before {
            content: "";
            position: absolute;
            top: 5px;
            left: 5px;
            right: 5px;
            bottom: 5px;
            border-radius: 50%;
            border: 3px solid transparent;
            border-top-color: #e74c3c;
            -webkit-animation: spin 3s linear infinite;
            animation: spin 3s linear infinite;
        }

        #preloader #preloader-inner:after {
            content: "";
            position: absolute;
            top: 15px;
            left: 15px;
            right: 15px;
            bottom: 15px;
            border-radius: 50%;
            border: 3px solid transparent;
            border-top-color: #f9c922;
            -webkit-animation: spin 1.5s linear infinite;
            animation: spin 1.5s linear infinite;
        }

@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

@keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}