preview.html

<section id="form-section" class="form-section">
  <div class="container">
    <div class="lead-form-wrapper single-col-max mx-auto theme-bg-light rounded p-5">
      <h2 class="form-heading text-center">Get A Free Preview</h2>
      <div class="form-intro text-center mb-3">Sign up to get a free preview of the book. <br>You can offer visitors free book previews to generate leads.</div>
      <div class="form-wrapper mx-auto">					
	<form class="signup-form row g-2 align-items-center">
	  <div class="col-12 col-lg-9">
	    <label class="sr-only" for="semail">Email</label>
	    <input type="email" id="semail" name="semail1" class="form-control me-md-1 semail" placeholder="Your email">
	  </div>
	  <div class="col-12 col-lg-3">
	    <button type="submit" class="btn btn-primary btn-submit w-100">Send</button>
	  </div>
	</form><!--//signup-form-->
      </div><!--//form-wrapper-->
    </div><!--//lead-form-wrapper-->
  </div><!--//container-->
</section><!--//form-section-->