.loader {
            border: 16px solid #f3f3f3;
            border-radius: 50%;
            border-top: 16px solid red;
            -webkit-animation: spin 2s linear infinite;
            /* Safari */
            animation: spin 2s linear infinite;
            position: relative;
            margin: 20% 0 0 45%;
            width: 100px !important;
            height: 100px !important;
        }
        /* Safari */
        
        @-webkit-keyframes spin {
            0% {
                -webkit-transform: rotate(0deg);
            }
            100% {
                -webkit-transform: rotate(360deg);
            }
        }
        
        @keyframes spin {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }