.loader {
    border: 16px solid #f3f3f3; /* Light grey */
    border-top: 16px solid #3498db; /* Blue */
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 2s linear infinite;
}

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

.success {
    color: #fdfdfd; /* Green */
    font-size: 18px;
    text-align: center;
}

.error {
    color: #622555; /* Red */
    font-size: 18px;
    text-align: center;
}