.champs-requis::after {
    content: "*";
    color: red;
    font-size: 18px;
    margin-left: 5px;
}

.error.help-block {
    color: red;
    border: 1px solid red;
    border-radius: 5px;
    padding: 5px;
    margin-top: 3px;
}

.field-required {
    outline: none;
    border: 1px solid #800000;
    box-shadow: 0 0 5px 1px #800000;
}
span.error {
    outline: none;
    border: 1px solid #800000;
    box-shadow: 0 0 5px 1px #800000;
}