.loader {
    border: 4px solid #e3e3e3;
    border-radius: 50% !important;
    border-top: 4px solid #444;
    width: 32px;
    height: 32px;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
    display: inline-block;
}

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

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

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

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