.spinner {
    width: 18px;
    height: 18px;
    border: 3px solid #ccc;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
}

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