<!DOCTYPE html>
<html>
<head>
    <title>Login</title>
</head>
<body>
    <h2>Enter Password to Access</h2>
    <form method="post" action="check_password.php">
        <label for="password">Password:</label>
        <input type="password" id="password" name="password" required>
        <button type="submit">Submit</button>
    </form>
    <?php
    session_start();
    if (isset($_SESSION['error'])) {
        echo '<p style="color: red;">' . $_SESSION['error'] . '</p>';
        unset($_SESSION['error']);
    }
    ?>
</body>
</html>