Live Demo: Bootstrap Elegant Sign Up Form with Icons

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>Bootstrap Elegant Sign Up Form with Icons</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:400,700">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
<style>
body {
	color: #999;
	background: #f5f5f5;
	font-family: 'Roboto', sans-serif;
}
.form-control, .form-control:focus, .input-group-addon {
	border-color: #e1e1e1;
	border-radius: 0;
}
.signup-form {
	width: 390px;
	margin: 0 auto;
	padding: 30px 0;
}
.signup-form h2 {
	color: #636363;
	margin: 0 0 15px;
	text-align: center;
}
.signup-form .lead {
	font-size: 14px;
	margin-bottom: 30px;
	text-align: center;
}
.signup-form form {		
	border-radius: 1px;
	margin-bottom: 15px;
	background: #fff;
	border: 1px solid #f3f3f3;
	box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
	padding: 30px;
}
.signup-form .form-group {
	margin-bottom: 20px;
}
.signup-form label {
	font-weight: normal;
	font-size: 13px;
}
.signup-form .form-control {
	min-height: 38px;
	box-shadow: none !important;
	border-width: 0 0 1px 0;
}	
.signup-form .input-group-addon {
	max-width: 42px;
	text-align: center;
	background: none;
	border-bottom: 1px solid #e1e1e1;
	padding-left: 5px;
}
.signup-form .btn, .signup-form .btn:active {        
	font-size: 16px;
	font-weight: bold;
	background: #19aa8d !important;
	border-radius: 3px;
	border: none;
	min-width: 140px;
}
.signup-form .btn:hover, .signup-form .btn:focus {
	background: #179b81 !important;
}
.signup-form a {
	color: #19aa8d;
	text-decoration: none;
}	
.signup-form a:hover {
	text-decoration: underline;
}
.signup-form .fa {
	font-size: 21px;
	position: relative;
	top: 8px;
}
.signup-form .fa-paper-plane {
	font-size: 17px;
}
.signup-form .fa-check {
	color: #fff;
	left: 9px;
	top: 18px;
	font-size: 7px;
	position: absolute;
}
</style>
</head>
<body>
<div class="signup-form">	
    <form action="/examples/actions/confirmation.php" method="post">
		<h2>Create Account</h2>
		<p class="lead">It's free and hardly takes more than 30 seconds.</p>
        <div class="form-group">
			<div class="input-group">
				<span class="input-group-addon"><i class="fa fa-user"></i></span>
				<input type="text" class="form-control" name="username" placeholder="Username" required="required">
			</div>
        </div>
        <div class="form-group">
			<div class="input-group">
				<span class="input-group-addon"><i class="fa fa-paper-plane"></i></span>
				<input type="email" class="form-control" name="email" placeholder="Email Address" required="required">
			</div>
        </div>
		<div class="form-group">
			<div class="input-group">
				<span class="input-group-addon"><i class="fa fa-lock"></i></span>
				<input type="text" class="form-control" name="password" placeholder="Password" required="required">
			</div>
        </div>
		<div class="form-group">
			<div class="input-group">
				<span class="input-group-addon">
					<i class="fa fa-lock"></i>
					<i class="fa fa-check"></i>
				</span>
				<input type="text" class="form-control" name="confirm_password" placeholder="Confirm Password" required="required">
			</div>
        </div>        
		<div class="form-group">
            <button type="submit" class="btn btn-primary btn-block btn-lg">Sign Up</button>
        </div>
		<p class="small text-center">By clicking the Sign Up button, you agree to our <br><a href="#">Terms &amp; Conditions</a>, and <a href="#">Privacy Policy</a>.</p>
    </form>
	<div class="text-center">Already have an account? <a href="#">Login here</a>.</div>
</div>
</body>
</html>