JSFiddle - React, Tailwind, and code Playground

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="row justify-content-center" style="width:80vw">
  <div class="col-md-4 col-sm-6 col-10">
    <div class="black h-100">
      <div class="grid fd-column gs4 gsy js-auth-item ">
        <label class="grid--cell s-label" for="email">メールアドレス</label>
        <div class="grid ps-relative">
          <input class="s-input" id="email" type="email" size="20" maxlength="100" name="email">
        </div>
        <p class="grid--cell s-input-message js-error-message d-none">

        </p>
        <button class="grid--cell s-btn s-btn__primary" id="submit-button" name="submit-button">登録</button>
      </div>
    </div>
  </div>
  <div class="col-md-4 col-sm-6 col-10">
    <div class="red h-100">
      プライバシーポリシー
    </div>
  </div>
</div>

CSS

.black {
  background: #000;
}

.red {
  background: #000000;
}