<?php
session_start();
require_once 'config.php'; 

$pdo = getConexaoAtiva();

// Redireciona se não estiver logado
if (!isset($_SESSION['user_id'])) { header("Location: login.php"); exit; }

$role = $_SESSION['user_role'] ?? 'reseller'; 
$nome_usuario = $_SESSION['username'] ?? 'Usuário';
$user_id_logado = $_SESSION['user_id'];
$mensagem = "";

// --- INÍCIO: BUSCA DE PERSONALIZAÇÃO DINÂMICA ---
$nome_painel = 'TOP IPTV';
$logo_url = '';
$cor_primaria = '#007bff';

try {
    $tabela_existe = $pdo->query("SHOW TABLES LIKE 'painel_config'")->rowCount() > 0;
    if ($tabela_existe) {
        $config_painel = $pdo->query("SELECT * FROM painel_config LIMIT 1")->fetch(PDO::FETCH_ASSOC);
        if ($config_painel) {
            $nome_painel = !empty($config_painel['nome_painel']) ? $config_painel['nome_painel'] : $nome_painel;
            $logo_url = !empty($config_painel['logo_url']) ? $config_painel['logo_url'] : $logo_url;
            $cor_primaria = !empty($config_painel['cor_primaria']) ? $config_painel['cor_primaria'] : $cor_primaria;
        }
    }
} catch (Exception $e) {}

// =========================================================================
// AUTO-CORREÇÃO: GARANTE QUE AS COLUNAS WHATSAPP E EMAIL EXISTAM
// =========================================================================
try {
    $check_zap = $pdo->query("SHOW COLUMNS FROM `reg_users` LIKE 'whatsapp'");
    if (!$check_zap->fetch()) { $pdo->exec("ALTER TABLE `reg_users` ADD COLUMN `whatsapp` VARCHAR(50) DEFAULT ''"); }
    
    $check_email = $pdo->query("SHOW COLUMNS FROM `reg_users` LIKE 'email'");
    if (!$check_email->fetch()) { $pdo->exec("ALTER TABLE `reg_users` ADD COLUMN `email` VARCHAR(100) DEFAULT ''"); }
} catch (Exception $e) {}

// =========================================================================
// PROCESSA A ATUALIZAÇÃO DOS DADOS
// =========================================================================
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['atualizar_perfil'])) {
    $novo_whatsapp = trim($_POST['whatsapp']);
    $novo_email = trim($_POST['email']);
    
    try {
        $query = "UPDATE reg_users SET whatsapp = ?, email = ?";
        $params = [$novo_whatsapp, $novo_email];
        
        // --- INÍCIO: ALTERAÇÃO DE CREDENCIAIS EXCLUSIVA PARA O ADMIN ---
        if ($role === 'admin') {
            if (!empty($_POST['novo_usuario'])) {
                $novo_usr = trim($_POST['novo_usuario']);
                $query .= ", username = ?";
                $params[] = $novo_usr;
                
                // Atualiza a variável de sessão para não deslogar o admin
                $_SESSION['username'] = $novo_usr; 
                $nome_usuario = $novo_usr; 
            }
            if (!empty($_POST['nova_senha'])) {
                $nova_pw = $_POST['nova_senha'];
                $query .= ", password = ?";
                $params[] = $nova_pw;
            }
        }
        // --- FIM: ALTERAÇÃO DE CREDENCIAIS ---
        
        $query .= " WHERE id = ?";
        $params[] = $user_id_logado;
        
        $stmt = $pdo->prepare($query);
        if ($stmt->execute($params)) {
            $mensagem = "<div class='alert alert-success'><i class='fas fa-check-circle'></i> Dados atualizados com sucesso!</div>";
        }
    } catch (Exception $e) {
        // Proteção caso tente colocar um usuário que já existe no banco
        if (strpos($e->getMessage(), 'Duplicate') !== false) {
            $mensagem = "<div class='alert alert-danger'><i class='fas fa-times-circle'></i> Erro: Este nome de usuário já está em uso!</div>";
        } else {
            $mensagem = "<div class='alert alert-danger'><i class='fas fa-times-circle'></i> Erro ao atualizar dados.</div>";
        }
    }
}

// Busca os dados atualizados do usuário
try {
    $user_data = $pdo->query("SELECT credits, whatsapp, email FROM reg_users WHERE id = " . intval($user_id_logado))->fetch(PDO::FETCH_ASSOC);
    $user_credits = $user_data['credits'] ?? 0;
    $user_whatsapp = $user_data['whatsapp'] ?? '';
    $user_email = $user_data['email'] ?? '';
} catch (Exception $e) { 
    $user_credits = 0; $user_whatsapp = ''; $user_email = ''; 
}
?>
<!DOCTYPE html>
<html lang="pt-BR">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>Meu Perfil - <?php echo htmlspecialchars($nome_painel); ?></title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        :root { 
            --bg-dark: #121519; 
            --bg-sidebar: #1e2227; 
            --bg-card: #272c33; 
            --text-main: #d1d5da; 
            --text-muted: #8a94a1; 
            --accent: <?php echo htmlspecialchars($cor_primaria); ?>; 
            --border-color: #3a4149; 
            --success: #28a745; 
        }
        * { box-sizing: border-box; }
        body { margin: 0; font-family: 'Segoe UI', sans-serif; background-color: var(--bg-dark); color: var(--text-main); display: flex; height: 100vh; overflow: hidden; }
        
        /* SIDEBAR (PADRÃO DO SEU SISTEMA) */
        .sidebar { width: 260px; background-color: var(--bg-sidebar); display: flex; flex-direction: column; transition: 0.3s; border-right: 1px solid var(--border-color); z-index: 1001; flex-shrink: 0; }
        .sidebar-header { padding: 25px 20px; text-align: center; font-size: 22px; font-weight: bold; color: white; border-bottom: 1px solid var(--border-color); }
        .sidebar-logo { max-width: 100%; max-height: 50px; object-fit: contain; }
        .user-info { padding: 20px; text-align: center; border-bottom: 1px solid var(--border-color); }
        .user-info .badge { background: rgba(255, 255, 255, 0.05); color: var(--accent); padding: 4px 10px; border-radius: 4px; font-size: 11px; text-transform: uppercase; font-weight: bold; margin-top: 5px; display: inline-block; }
        .credits-badge { display: block; margin-top: 10px; color: var(--success); font-weight: bold; font-size: 13px; }
        .menu-list { list-style: none; padding: 0; margin: 0; overflow-y: auto; flex: 1; }
        .menu-item { padding: 14px 20px; color: var(--text-main); text-decoration: none; display: flex; align-items: center; transition: 0.2s; border-left: 3px solid transparent; font-size: 15px; cursor: pointer; }
        .menu-item i:first-child { margin-right: 12px; width: 20px; text-align: center; color: var(--text-muted); }
        .menu-item:hover, .menu-item.active { background-color: #2c3138; color: white; border-left-color: var(--accent); }
        .menu-item.active i:first-child { color: var(--accent); }
        .submenu { display: none; background: #16191d; list-style: none; padding: 0; margin: 0; }
        .submenu .menu-item { padding-left: 52px; font-size: 14px; border-left: none; }
        .arrow-icon { margin-left: auto; transition: 0.3s; font-size: 12px; }
        .rotate { transform: rotate(180deg); }
        .menu-category { padding: 20px 20px 8px; font-size: 11px; text-transform: uppercase; color: var(--text-muted); font-weight: bold; letter-spacing: 1px; }
        .logout-btn { padding: 15px; background-color: #dc3545; color: white; text-align: center; text-decoration: none; font-weight: bold; }
        
        /* MAIN CONTENT */
        .main-content { flex: 1; display: flex; flex-direction: column; overflow-y: auto; width: 100%; position: relative; }
        .topbar { display: flex; justify-content: space-between; align-items: center; padding: 15px 25px; background-color: var(--bg-sidebar); border-bottom: 1px solid var(--border-color); flex-shrink: 0; }
        .menu-toggle { display: none; background: none; border: none; color: white; font-size: 22px; cursor: pointer; padding: 5px; }
        .content-area { padding: 30px; flex: 1; width: 100%; max-width: 1000px; margin: 0 auto; }
        
        /* ALERTAS */
        .alert { padding: 15px; border-radius: 8px; margin-bottom: 20px; font-weight: bold; font-size: 14px; display: flex; align-items: center; gap: 10px; }
        .alert-success { background: rgba(40, 167, 69, 0.15); color: #2ecc71; border: 1px solid #2ecc71; }
        .alert-danger { background: rgba(220, 53, 69, 0.15); color: #e74c3c; border: 1px solid #e74c3c; }

        /* PERFIL STYLES */
        .profile-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 25px; }
        
        /* CARD DE RESUMO (ESQUERDA) */
        .card-summary { background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border-color); padding: 30px; text-align: center; }
        .avatar-circle { width: 90px; height: 90px; border-radius: 50%; background: rgba(0,0,0,0.3); border: 2px solid var(--accent); display: flex; align-items: center; justify-content: center; font-size: 40px; color: var(--accent); margin: 0 auto 15px auto; }
        .user-title { color: white; font-size: 22px; margin: 0 0 5px 0; font-weight: bold; }
        .role-badge { display: inline-block; background: rgba(255,255,255,0.05); border: 1px solid var(--border-color); padding: 5px 15px; border-radius: 20px; font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 25px; }
        
        .credits-box { background: rgba(0,0,0,0.2); border-radius: 10px; padding: 20px; border: 1px dashed var(--accent); }
        .credits-box span { display: block; font-size: 12px; color: var(--text-muted); text-transform: uppercase; font-weight: bold; margin-bottom: 5px; }
        .credits-box h2 { margin: 0; color: var(--success); font-size: 32px; display: flex; align-items: center; justify-content: center; gap: 10px; }

        /* CARD DE FORMULÁRIO (DIREITA) */
        .card-form { background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border-color); padding: 30px; }
        .card-form h3 { margin-top: 0; color: white; display: flex; align-items: center; gap: 10px; font-size: 18px; margin-bottom: 25px; border-bottom: 1px solid var(--border-color); padding-bottom: 15px; }
        
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; margin-bottom: 8px; color: var(--text-muted); font-weight: bold; font-size: 13px; }
        
        .input-group { position: relative; display: flex; align-items: center; }
        .input-group i { position: absolute; left: 15px; color: var(--text-muted); font-size: 16px; }
        .form-control { width: 100%; padding: 14px 14px 14px 45px; background: #121519; border: 1px solid var(--border-color); color: white; border-radius: 8px; font-size: 14px; transition: 0.3s; }
        .form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px rgba(255,255,255,0.05); }
        
        .btn-save { background: var(--accent); color: white; padding: 14px; border: none; border-radius: 8px; font-weight: bold; font-size: 15px; cursor: pointer; width: 100%; transition: 0.2s; display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 10px; }
        .btn-save:hover { filter: brightness(0.85); transform: translateY(-2px); }

        /* RESPONSIVIDADE MOBILE */
        @media (max-width: 768px) {
            .menu-toggle { display: block; }
            .sidebar { position: fixed; left: -260px; height: 100%; box-shadow: 10px 0 20px rgba(0,0,0,0.5); }
            .sidebar.active { left: 0; }
            .sidebar-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.7); z-index: 1000; }
            .sidebar-overlay.active { display: block; }
            .profile-grid { grid-template-columns: 1fr; gap: 20px; }
            .content-area { padding: 15px; }
            .topbar { padding: 10px 15px; }
        }
    </style>
</head>
<body>
    <div class="sidebar-overlay" id="overlay"></div>
    <nav class="sidebar" id="sidebar">
        <div class="sidebar-header">
            <?php if(!empty($logo_url) && file_exists($logo_url)): ?>
                <img src="<?php echo htmlspecialchars($logo_url); ?>" alt="Logo" class="sidebar-logo">
            <?php else: ?>
                <?php echo htmlspecialchars($nome_painel); ?>
            <?php endif; ?>
        </div>
        <div class="user-info">
            <div style="color:white; font-size: 14px;">Olá, <strong><?php echo htmlspecialchars($nome_usuario); ?></strong></div>
            <span class="badge"><?php echo $role === 'admin' ? 'Administrador' : 'Revendedor'; ?></span>
            <div class="credits-badge"><i class="fas fa-coins"></i> Saldo: <?php echo number_format($user_credits, 1); ?></div>
        </div>
        <div class="menu-list">
            <a href="dashboard.php" class="menu-item active"><i class="fas fa-chart-line"></i> Dashboard</a>
            <a href="perfil.php" class="menu-item active"><i class="fas fa-user-circle"></i> Meu Perfil</a>
            
            <a href="lancamentos.php" class="menu-item active"><i class="fas fa-fire"></i> Últimos Adicionados</a>
            
            <a href="ajuda.php" class="menu-item active"><i class="fas fa-question-circle"></i> Material de Ajuda</a>
            
            <div class="menu-category">Gestão</div>
            <a href="clientes.php" class="menu-item active"><i class="fas fa-users"></i> Clientes IPTV</a>
            <a href="testes.php" class="menu-item active"><i class="fas fa-vial"></i> Gerenciar Testes</a>
            <a href="online.php" class="menu-item active"><i class="fas fa-plug"></i> Clientes Online</a>
            <a href="revendedores.php" class="menu-item active"><i class="fas fa-user-tie"></i> Revendedores</a>
            <a href="migrar_clientes.php" class="menu-item active"><i class="fas fa-exchange-alt"></i> Migrar Clientes</a>
            <a href="logs_creditos.php" class="menu-item active"><i class="fas fa-list-alt"></i> Extrato de Créditos</a>
            <a href="marketing.php" class="menu-item active"><i class="fas fa-bullhorn"></i> Central de Marketing</a>
            
            
            <div class="menu-category">Clientes P2P</div>
            <a href="p2p_clientes.php" class="menu-item active"><i class="fas fa-tv"></i> Clientes P2P</a>
            
            <?php if (!empty($api_conf['api_binstream_url'])): ?>
                <a href="binstream_p2p.php" class="menu-item active"><i class="fas fa-tv"></i> Binstream P2P</a>
            <?php endif; ?>

            <div class="menu-category">Integração & Cobrança</div>
            <a href="pagamentos.php" class="menu-item active"><i class="fas fa-dollar-sign"></i> Pagamento Automático</a>
            <a href="cobranca.php" class="menu-item active"><i class="fas fa-comment-dollar"></i> Central de Cobrança</a>
            <a href="admin_planos.php" class="menu-item active"><i class="fas fa-tags"></i> Meus Planos de Venda</a>
            <a href="comprar_creditos.php" class="menu-item active"><i class="fas fa-shopping-cart"></i> Comprar Créditos</a>
            
            <div class="menu-item active" onclick="toggleSubmenu('appsSub')">
                <i class="fas fa-rocket"></i><span>Aplicações</span><i class="fas fa-chevron-down arrow-icon" id="arrow-appsSub"></i>
            </div>
            <div class="submenu" id="appsSub">
                <a href="loja_apps.php" class="menu-item active"><i class="fas fa-store"></i> Loja de Aplicativos</a>
                <?php if($role === 'admin'): ?>
                    <a href="admin_loja.php" class="menu-item active"><i class="fas fa-cogs"></i> Gerenciar Loja</a>
                <?php endif; ?>
                <a href="chatbot.php" class="menu-item active"><i class="fab fa-whatsapp"></i> Chatbot Automático</a>
            </div>
           <a href="admin_player_revenda.php" class="menu-item active"><i class="fas fa-play-circle"></i> WebPlayer</a>
            
   <div class="menu-category">Segurança</div>
            <a href="historico_logins.php" class="menu-item active"><i class="fas fa-shield-alt"></i> Sessões Ativas</a>

            <?php if($role === 'admin'): ?>
                <div class="menu-category">Administração</div>
                <a href="admin_monitor.php" class="menu-item active"><i class="fas fa-heartbeat"></i> Monitor do Servidor</a>
                <a href="admin_template.php" class="menu-item active"><i class="fas fa-edit"></i> Editor de Template</a>
                <a href="admin_lb.php" class="menu-item active"><i class="fas fa-server"></i> Load Balancers</a>
                <a href="guia_cloudflare.php" class="menu-item active"><i class="fas fa-cloud"></i> Guia Cloudflare</a>
                 <a href="admin_loja_creditos.php" class="menu-item active"><i class="fas fa-store"></i> Configurar Loja (PIX)</a>
                 <a href="integracoes_api.php" class="menu-item active"><i class="fas fa-plug"></i> Integrações API</a>
                 <a href="integracoes_api_whatsapp.php" class="menu-item active"><i class="fas fa-plug"></i> Integrações API WhatsApp</a>
                 <a href="admin_robo.php" class="menu-item active"><i class="fas fa-robot"></i> Robô de Cobrança</a>
                 <a href="admin_anti_bloqueio.php" class="menu-item active"><i class="fas fa-bolt"></i> Botão de Pânico</a>
                 <a href="admin_anti_fraude.php" class="menu-item active"><i class="fas fa-user-secret"></i> Radar Anti-Fraude</a>  
                 <a href="admin_watchdog.php" class="menu-item active"><i class="fas fa-dog"></i> Watchdog LB</a>  
                 
                 <a href="admin_epg_sync.php" class="menu-item active">
        <i class="fas fa-clock"></i> Sincronizar EPG
    </a>

 <div class="menu-item active" onclick="toggleSubmenu('painelSub')">
                    <i class="fas fa-desktop"></i><span>Painel</span><i class="fas fa-chevron-down arrow-icon" id="arrow-painelSub"></i>
                </div>
                <div class="submenu" id="painelSub">
                    <a href="personalizacao.php" class="menu-item active"><i class="fas fa-paint-brush"></i> Personalização</a>
                </div>
             
                <div class="menu-item active" onclick="toggleSubmenu('adminSub')">
                    <i class="fas fa-toolbox"></i><span>Ferramentas</span><i class="fas fa-chevron-down arrow-icon" id="arrow-adminSub"></i>
                </div>
                <div class="submenu" id="adminSub">
                    <a href="importar.php" class="menu-item active"><i class="fas fa-file-import"></i> Importador</a>
                    <a href="importar3.php" class="menu-item active"><i class="fas fa-file-import"></i> Importador Turbo</a>
                    <a href="dns_manager.php" class="menu-item active"><i class="fas fa-link"></i> Alterar DNS</a>
                    <a href="admin_logos.php" class="menu-item active"><i class="fas fa-image"></i> Alterar Logos</a>
                    <a href="mover_conteudos.php" class="menu-item active"><i class="fas fa-exchange-alt"></i> Mover Conteúdos</a>
                    <a href="limpeza.php" class="menu-item active"><i class="fas fa-trash-alt"></i> Limpeza de Dados</a>
                    <a href="limpar_duplicados.php" class="menu-item active"><i class="fas fa-copy"></i> Limpeza de Duplicados</a>
                    <a href="backup.php" class="menu-item active"><i class="fas fa-database"></i> Backup do Sistema</a>
                    <a href="seguranca.php" class="menu-item active"><i class="fas fa-shield-alt"></i> Sistema de Segurança</a>
                    <a href="configuracoes.php" class="menu-item active"><i class="fas fa-tools"></i> Configurações</a>
                </div>

                 <?php if($role === 'admin'): ?>
    <div class="menu-category">Financeiro</div>
     <!-- NOVO MENU FINANCEIRO COM SUBMENU -->
            <div class="menu-item active" onclick="toggleSubmenu('finSub')">
                <i class="fas fa-hand-holding-usd"></i><span>Financeiro</span><i class="fas fa-chevron-down arrow-icon rotate" id="arrow-finSub"></i>
            </div>
            <div class="submenu" id="finSub" style="display: block;">
                <a href="financeiro.php" class="menu-item active">Faturamento</a>
            </div>
    
    <?php endif; ?>

                <div class="menu-category">Conteúdos</div>
                <a href="categorias.php" class="menu-item active"><i class="fas fa-folder-open"></i><span>Categorias</span></a>
                <div class="menu-item active" onclick="toggleSubmenu('contentSub')">
                    <i class="fas fa-layer-group"></i><span>Mídias</span><i class="fas fa-chevron-down arrow-icon" id="arrow-contentSub"></i>
                </div>
                <div class="submenu" id="contentSub">
                    <a href="bouquets.php" class="menu-item active">Editar Bouquets</a>
                    <a href="canais.php" class="menu-item active">Canais Ao Vivo</a>
                    <a href="filmes.php" class="menu-item active">Filmes (VOD)</a>
                    <a href="series.php" class="menu-item active">Séries</a>
                </div>
                 <a href="admin_autofix_vod.php" class="menu-item active"><i class="fas fa-magic"></i> Auto-Fix TMDB</a>
            <?php endif; ?>
        </div>
        <a href="logout.php" class="logout-btn"><i class="fas fa-power-off"></i> Sair</a>
    </nav>

    <div class="main-content">
        <header class="topbar">
            <button class="menu-toggle" onclick="toggleMenu()"><i class="fas fa-bars"></i></button>
            <h2 style="margin:0; font-size: 18px; color:white;">Configurações da Conta</h2>
            <div class="topbar-right"></div>
        </header>

        <div class="content-area">
            <?php echo $mensagem; ?>
            
            <div class="profile-grid">
                
                <div class="card-summary">
                    <div class="avatar-circle">
                        <i class="fas fa-user"></i>
                    </div>
                    <h2 class="user-title"><?php echo htmlspecialchars($nome_usuario); ?></h2>
                    <div class="role-badge"><?php echo $role === 'admin' ? 'Administrador do Sistema' : 'Revendedor Autorizado'; ?></div>
                    
                    <div class="credits-box">
                        <span><i class="fas fa-wallet"></i> Saldo Atual</span>
                        <h2><i class="fas fa-coins"></i> <?php echo number_format($user_credits, 1); ?></h2>
                    </div>
                </div>

                <div class="card-form">
                    <h3><i class="fas fa-address-card" style="color: var(--accent);"></i> Informações de Contato</h3>
                    
                    <form method="POST">
                        <div class="form-group">
                            <label>Número do WhatsApp</label>
                            <div class="input-group">
                                <i class="fab fa-whatsapp"></i>
                                <input type="text" name="whatsapp" class="form-control" placeholder="Ex: 5511999999999" value="<?php echo htmlspecialchars($user_whatsapp); ?>">
                            </div>
                        </div>
                        
                        <div class="form-group">
                            <label>E-mail (Gmail/Outros)</label>
                            <div class="input-group">
                                <i class="fas fa-envelope"></i>
                                <input type="email" name="email" class="form-control" placeholder="seuemail@gmail.com" value="<?php echo htmlspecialchars($user_email); ?>">
                            </div>
                        </div>

                        <?php if ($role === 'admin'): ?>
                        <div style="margin-top: 30px; margin-bottom: 20px; border-top: 1px solid var(--border-color); padding-top: 20px;">
                            <h4 style="color: var(--accent); margin-top: 0; margin-bottom: 15px; font-size: 15px;"><i class="fas fa-user-shield"></i> Credenciais de Acesso (Exclusivo Admin)</h4>
                            
                            <div class="form-group">
                                <label>Nome de Usuário</label>
                                <div class="input-group">
                                    <i class="fas fa-user"></i>
                                    <input type="text" name="novo_usuario" class="form-control" value="<?php echo htmlspecialchars($nome_usuario); ?>" required>
                                </div>
                            </div>

                            <div class="form-group">
                                <label>Nova Senha</label>
                                <div class="input-group">
                                    <i class="fas fa-lock"></i>
                                    <input type="text" name="nova_senha" class="form-control" placeholder="Deixe em branco para não alterar">
                                </div>
                            </div>
                        </div>
                        <?php endif; ?>

                        <button type="submit" name="atualizar_perfil" class="btn-save">
                            <i class="fas fa-save"></i> SALVAR ALTERAÇÕES
                        </button>
                    </form>
                </div>

            </div>
        </div>
        <?php include 'rodape.php'; ?>
    </div>

    <script>
        const sidebar = document.getElementById('sidebar');
        const overlay = document.getElementById('overlay');
        function toggleMenu() { sidebar.classList.toggle('active'); overlay.classList.toggle('active'); }
        overlay.onclick = toggleMenu;

        function toggleSubmenu(id) {
            const sub = document.getElementById(id);
            const arrow = document.getElementById('arrow-' + id);
            if (sub.style.display === "block") { sub.style.display = "none"; arrow.classList.remove('rotate'); } 
            else { sub.style.display = "block"; arrow.classList.add('rotate'); }
        }
    </script>
</body>
</html>