fieldset.sw_km {
    margin: 0 0 15px;
    border: 1px dashed red;
    padding: 15px;
    border-radius: 10px;
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    font-size: 16px;
}
fieldset.sw_km legend {
    padding: 3px 10px;
    margin: 0;
    border: 0;
    background-color: #cc1818;
    color: #fff;
    border-radius: 10px;
    width: auto;
}