.alert_error{
    display: none;
    padding: 1em;
    margin: 1em auto;
    color: red;
    background-color: #ffe6e6;
    border: 1px solid red;
    border-radius: 5px;
}
.alert_success{
    display: none;
    padding: 1em;
    margin: 1em auto;
    color: green;
    background-color: #e6ffe6;
    border: 1px solid green;
    border-radius: 5px;
}