<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="tile">
<div class="tile-header">
<h2 style="color: white; opacity: .75; font-size: 4rem; display: flex; justify-content: center; align-items: center; height: 100%;">SIGN IN</h2>
</div>
<div class="tile-body">
<form id="form">
<label class="form-input">
<i class="material-icons">person</i>
<input type="text" autofocus="true" required />
<span class="label">Username</span>
<span class="underline"></span>
</label>
<label class="form-input">
<i class="material-icons">lock</i>
<input type="password" required />
<span class="label">Password</span>
<div class="underline"></div>
</label>
<div class="submit-container clearfix" style="margin-top: 2rem;">
<div id="submit" role="button" type="button" class="btn btn-irenic float-right" tabindex="0">
<span>SIGN IN</span>
</div>
<div class="login-pending">
<div class=spinner>
<span class="dot1"></span>
<span class="dot2"></span>
</div>