.submitLoading {
    display: none;
    position: relative;
    left: 50%;
    border: 16px solid rgba(243, 243, 243, 0.05); /* Light grey */
    border-top: 16px solid #0d2f86; /* Blue */
    border-radius: 50%;
    width: 7px;
    height: 7px;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}