.payment-modal-spinner {
    width: 40px;
    height: 40px;
    margin: 24px auto 8px;
    border: 3px solid rgba(255, 255, 255, 0.15);
    border-top-color: #b637bc;
    border-radius: 50%;
    animation: payment-spin 0.8s linear infinite;
}

@keyframes payment-spin {
    to { transform: rotate(360deg); }
}