form {
    width: 70%;
    margin: 20px auto;
}

.form-group.internal {
    float: left;
    width: 45%;
    margin-right: 5px;
}

.form-group.internal:nth-child(odd) {
    clear: both;
}

.form-control.internal {
    /*max-width: 80%;*/
}


form.clean{
    width: auto;
    margin: 0 3px;
    float: right;

}