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                <form class="form-inline">
<div class="row">

                    <div class="form-group string optional bc_search_last_name"><label class="string optional control-label" for="bc_search_last_name">label</label><input class="string optional form-control" type="text" name="bc_search[last_name]" id="bc_search_last_name"></div>


<div class="row">
                      <div class="form-group string optional bc_search_first_name"><label class="string optional control-label" for="bc_search_first_name">Really long label</label><input class="string optional form-control" type="text" name="bc_search[first_name]" id="bc_search_first_name"></div>


  width: 600px
  border: 1px dotted black
  left: 50px
  top: 50px
  padding: 5px 20px
    margin-bottom: 10px
    width: 100%
    display: flex

    padding: 6px 9px 6px 6px
    border: 1px solid #ccc
    border-right: 0
    border-radius: 5px 0 0 5px
    background-color: rgba(179, 177, 177, 0.28)

    flex: 1
    border-radius: 0px 5px 5px 0