<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 ---------->
<div class="full-screen-size-fixed-container d-flex justify-content-center align-items-center">
<div class="bg-dark p-4 text-white shadow-lg col-10 col-sm-8 col-md-7 col-lg-8 col-xl-4">
<form>
<div class="form-group">
<label for="email">Email address:</label>
<input type="email" class="form-control" placeholder="Enter email..." id="email" required>
</div>
<div class="form-group">
<label for="password">Password:</label>
<input type="password" class="form-control" placeholder="Enter password..." id="password" aria-describedby="passwordHelpBlock" required>
<small id="passwordHelpBlock" class="form-text text-muted">
Your password must be between 8 and 30 characters long, contain at least one uppercase letter, contain at least one number, and contain at least one special character.
</small>
</div>
<div class="form-group form-check">
<label class="form-check-label">
<input class="form-check-input" type="checkbox"> Remember me
</label>
</div>
<button type="submit" class="btn btn-light">Submit</button>
</form>
</div>
</div>
