// Simple authentication for LangMem Documentation
(function() {
    'use strict';
    
    // Check if user is already authenticated
    if (sessionStorage.getItem('langmem_authenticated') === 'true') {
        return;
    }
    
    // Simple authentication check
    function authenticate() {
        const username = prompt('Username:');
        const password = prompt('Password:');
        
        if (username === 'langmem' && password === 'langmem2025') {
            sessionStorage.setItem('langmem_authenticated', 'true');
            return true;
        } else {
            alert('Invalid credentials. Access denied.');
            window.location.href = 'about:blank';
            return false;
        }
    }
    
    // Show authentication dialog
    if (!authenticate()) {
        // Block access if authentication fails
        document.addEventListener('DOMContentLoaded', function() {
            document.body.innerHTML = '<h1>Access Denied</h1><p>Authentication required.</p>';
        });
    }
})();