<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.0/css/all.css" integrity="sha384-lKuwvrZot6UHsBSfcMvOkWwlCMgc0TaWr+30HWe3a4ltaBwTZhyTEggF5tJv8tbt" crossorigin="anonymous"> <div class="container"> <br/> <div class="row justify-content-center"> <div class="col-12 col-md-10 col-lg-8"> <form class="card card-sm"> <div class="card-body row no-gutters align-items-center"> <div class="col-auto"> <i class="fas fa-search h4 text-body"></i> </div> <!--end of col--> <div class="col"> <input class="form-control form-control-lg form-control-borderless" type="search" placeholder="Search topics or keywords"> </div> <!--end of col--> <div class="col-auto"> <button class="btn btn-lg btn-success" type="submit">Search</button> </div> <!--end of col--> </div> </form> </div> <!--end of col--> </div> </div>

.form-control-borderless { border: none; } .form-control-borderless:hover, .form-control-borderless:active, .form-control-borderless:focus { border: none; outline: none; box-shadow: none; }