.alert {
    display: none;
    position: fixed;
    top: 120px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 14px;
    text-align: center;
}

.alert-success {
    background-color: #4CAF50;
    color: white;
}

.alert-error {
    background-color: #f44336;
    color: white;
}