.loader {
        width:25px;
        /*margin-top: 15%;*/
        -webkit-animation: spin 1s linear infinite;
        /* Safari */
        animation: spin 1s linear infinite;
         display: inline-block;
    }

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

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

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

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