<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>
<body>
<div id="login">
<h3 class="text-center text-white pt-5">Login form</h3>
<div class="container">
<div id="login-row" class="row justify-content-center align-items-center">
<div id="login-column" class="col-md-6">
<div id="login-box" class="col-md-12">
<form id="login-form" class="form" action="" method="post">
<h3 class="text-center text-info">Login</h3>
<div class="form-group">
<label for="username" class="text-info">Username:</label><br>
<input type="text" name="username" id="username" class="form-control">
</div>
<div class="form-group">
<label for="password" class="text-info">Password:</label><br>
<input type="text" name="password" id="password" class="form-control">
</div>
<div class="form-group">
<label for="remember-me" class="text-info"><span>Remember me</span>·<span><input id="remember-me" name="remember-me" type="checkbox"></span></label><br>
<input type="submit" name="submit" class="btn btn-info btn-md" value="submit">
</div>
<div id="register-link" class="text-right">
<a href="#" class="text-info">Register here</a>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
</body>
