<div class="row">
  <div class="col-xs-7">
    [text* email class:form-control placeholder "Email address"]
  </div>
  <div class="col-xs-5">
    [submit class:form-control "SUBMIT"]
  </div>
</div>
<div class="row subscribe-row">
  <div class="col-xs-12">
    [checkbox subscribe class:form-control default:1_2 label_first "Weekly Digest" "Monthly Newsletter"]
  </div>
</div>