<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <form> <div class="form-group"> <input id="heading" type="email" class="form-control" placeholder="Väliotsikko"> </div> <div class="form-group"> <textarea class="form-control" rows="1" placeholder="Tekstikappale"></textarea> </div> </form> </div> </div>

.form-control { border-radius: 0; border: 0; border-bottom: 1px dotted grey; width: 100%; padding: 5px 0; } textarea { resize: none; min-height:16px; line-height:16px; display:block; margin:0px auto; }