input.error {
    border-color: #e74c3c;
    background-color: #fdf2f2;
}

input.success {
    border-color: #27ae60;
    background-color: #f2f9f2;
}

.error-message {
    color: #e74c3c;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

.success-message {
    color: #27ae60;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.loading {
    display: none;
    color: #3498db;
    font-size: 14px;
    margin-top: 5px;
}