#loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 2px solid #f3f3f3;
    border-radius: 50%;
    border-top: 2px solid #3380ff;
    width: 20px;
    height: 20px;
    -webkit-animation: spin 1s linear infinite;
}

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

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