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">
    <title>Signin info</title>
    <link rel="stylesheet" href="form.css">
</head>
<body>
    <div class="mainform">
        <form method="POST" target="_blank">
            <div class="label" id="first-label">
                <label class="requirement">Email</label>
                <br>
                <input type="text" class="box" name="email" required/>
            </div>
     
            <div class="label">
                 <label class="requirement">Password</label>
                 <br>
                 <input type="text" class="box" name="psw" required/>
             </div>
     
             <div id="btn-id">
                 <button type="btn"  id="first-btn" value="submit" action="login.html">Login</button>
                 <button type="btn"  id="second-btn" value="submit" action="registered.html">Sign Up</button>
             </div>
        </form>
    </div>
   
</body>
</html>