JSFiddle - React, Tailwind, and code Playground

by ppgab

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="modal d-block" tabindex="-1" role="dialog">
  <div class="modal-dialog modal-lg" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title">
          Prévia Relatório
          <select class="custom-select w-auto" id="reportSelect">
            <option>1</option>
            <option>2</option>
            <option>3</option>
            <option>4</option>
          </select>
        </h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                <span aria-hidden="true">&times;</span>
                            </button>
      </div>
      <div class="modal-body">
      </div>
      <div class="modal-footer justify-content-between">
        <div>
          Agrupamento :
          <select class="custom-select w-auto">
                                    <option>Mesmo Arquivo</option>
                                    <option>Separados (ZIP)</option>
                                </select>
        </div>
        <div>
          <button class="btn btn-primary">Gerar</button>
        </div>
      </div>
    </div>
  </div>
</div>

CSS

select, input{
    border-top: none !important;
    border-left: none !important;
    border-right: none !important;
    border-radius: 0;
    border-bottom: 2px solid lightblue !important;
    padding: .3rem;
    overflow: auto !important;
    width: auto;
}
select:focus, input:focus{
    border-bottom-color: #07d !important;
    box-shadow: none !important;
}