.loading {
    position: relative;
    height: 150px;
    width: 150px;
    margin: 60px auto;
}

.js-loading-indicator {
    display: block;
    position: absolute;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #3498db;
    border-right-color: #3498db;
    -webkit-animation: spin 2s linear infinite;
    -moz-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
    z-index: 1002;
    width: 100%;
    height: 100%;
}

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

    .js-loading-indicator.triple::before, .js-loading-indicator.triple::after {
        content: "";
        position: absolute;
        border-radius: 50%;
        border: 3px solid transparent;
    }

    .js-loading-indicator.triple::before {
        top: 5px;
        left: 5px;
        right: 5px;
        bottom: 5px;
        border-top-color: #e74c3c;
        -webkit-animation: spin 3s linear infinite;
        -moz-animation: spin 3s linear infinite;
        animation: spin 3s linear infinite;
    }

    .js-loading-indicator.triple::after {
        top: 15px;
        left: 15px;
        right: 15px;
        bottom: 15px;
        border-top-color: #f9c922;
        -webkit-animation: spin 1.5s linear infinite;
        -moz-animation: spin 1.5s linear infinite;
        animation: spin 1.5s linear infinite;
    }

.js-loading-overlay {
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    background: rgba(128, 128, 128, 0.5);
}

@-webkit-keyframes spin {
    from {
        -webkit-transform: rotate(0);
    }

    to {
        -webkit-transform: rotate(360deg);
    }
}

@-moz-keyframes spin {
    from {
        -moz-transform: rotate(0);
    }

    to {
        -moz-transform: rotate(360deg);
    }
}

@keyframes spin {
    from {
        -webkit-transform: rotate(0);
        -moz-transform: rotate(0);
        -ms-transform: rotate(0);
        -o-transform: rotate(0);
        transform: rotate(0);
    }

    to {
        -webkit-transform: rotate(360deg);
        -moz-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        -o-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}