index.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style1.css">
    <title>Login interface</title>
</head>

<body>
    <div class="login-box">
        <h2>Login</h2>

        <form action="#">
            <div class="user-box">
                <input type="text" required="">
                <label for="">Username</label>
            </div>
            <div class="user-box">
                <input type="text" required="">
                <label for="">Password</label>
            </div>

            <a href="#">
                <span></span>
                <span></span>
                <span></span>
                <span></span>
                submit
            </a>

        </form>
    </div>
</body>

</html>