bootstrap contact form 7 structure

<div class="row inner-form-wrap">
    <div class="form-group col-md-6 col-sm-12">
        <label for="fullname">Full Name</label>
        [text* fullname id:fullname class:form-control placeholder "Full Name"]
    </div>
    <div class="form-group col-md-6 col-sm-12">
        <label for="phone">Phone</label>
        [text* phone id:phone class:form-control placeholder "Phone"]
    </div>
    <div class="form-group col-sm-12">
        <label for="email">Email address</label>
        [email* email id:email class:form-control placeholder "Email Address"]
    </div>
    <div class="form-group col-sm-12">
        <label for="subject">Subject</label>
        [text* subject id:subject class:form-control placeholder "Subject"]
    </div>
    <div class="form-group col-sm-12">
        <label for="message">Your Message</label>
        [textarea message id:message class:form-control placeholder "Your Message"]
    </div>
    <div class="form-group col-sm-12 text-right">
        [submit id:submit class:btn class:btn-default "Send"]
    </div>
</div>

styles

#submit{
    width: 50%;
    padding: 15px;
    margin-right: 0;
    font-size: 18px;
    background: #841316;
    color: #fff;
    box-shadow: none;
    border-radius: 0;
}
div.wpcf7 .ajax-loader{
    display: block;
}
#wpcf7-f1657-p7-o1 > form > div.row.inner-form-wrap > div:nth-child(6),
#wpcf7-f1657-p7-o1 > form > div.row.inner-form-wrap > div:nth-child(6) > div{
    margin-right: 0;
    padding-right: 0;
}
div.wpcf7-validation-errors{
    border: 2px solid #841316;
    color: #841316;
}