<!DOCTYPE html>
<html lang="<?= htmlspecialchars($currentLang ?? 'en') ?>">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title><?= isset($pageTitle) ? htmlspecialchars($pageTitle) . ' - ' : '' ?><?= __('site_title') ?></title>

    <?php if (isset($articleData)): ?>
        <meta name="description" content="<?= htmlspecialchars($articleData['meta_description'] ?? $articleData['excerpt']) ?>">
        <meta property="og:title" content="<?= htmlspecialchars($articleData['meta_title'] ?? $articleData['title']) ?>">
        <meta property="og:description" content="<?= htmlspecialchars($articleData['meta_description'] ?? $articleData['excerpt']) ?>">
        <meta property="og:image" content="<?= htmlspecialchars($articleData['featured_image'] ?? '') ?>">
        <meta property="og:type" content="article">
    <?php endif; ?>

    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
    <link href="<?= APP_URL ?>/assets/css/style.css" rel="stylesheet">

    <style>
        :root {
            --primary-color: #667eea;
            --secondary-color: #764ba2;
            --accent-color: #f093fb;
            --text-dark: #2d3748;
            --text-light: #718096;
            --border-color: #e2e8f0;
            --bg-light: #f7fafc;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
        }

        .gradient-bg {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
        }

        .navbar {
            background: rgba(255, 255, 255, 0.95) !important;
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-link {
            font-weight: 500;
            color: var(--text-dark) !important;
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

        .hero-section {
            min-height: 60vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
            color: white;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
            opacity: 0.1;
        }

        .card {
            border: none;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            overflow: hidden;
            background: white;
        }

        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .card-img-top {
            height: 200px;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .card:hover .card-img-top {
            transform: scale(1.05);
        }

        .btn {
            border-radius: 10px;
            font-weight: 600;
            padding: 12px 24px;
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .badge {
            border-radius: 20px;
            padding: 6px 12px;
            font-weight: 500;
        }

        .badge-internal {
            background: linear-gradient(135deg, #f093fb, #f5576c);
            color: white;
        }

        .badge-external {
            background: linear-gradient(135deg, #4facfe, #00f2fe);
            color: white;
        }

        .footer {
            background: var(--text-dark);
            color: white;
            padding: 60px 0 30px;
        }

        .language-selector .dropdown-toggle {
            background: transparent;
            border: 2px solid var(--border-color);
            color: var(--text-dark);
            border-radius: 25px;
            padding: 8px 16px;
        }

        .search-form {
            position: relative;
        }

        .search-form input {
            border-radius: 25px;
            border: 2px solid var(--border-color);
            padding: 10px 50px 10px 20px;
            background: white;
        }

        .search-form button {
            position: absolute;
            right: 5px;
            top: 50%;
            transform: translateY(-50%);
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border: none;
            border-radius: 50%;
            width: 35px;
            height: 35px;
            color: white;
        }

        .chat-widget {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 350px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            z-index: 1000;
            overflow: hidden;
        }

        .chat-header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 15px 20px;
            cursor: pointer;
            font-weight: 600;
        }

        .chat-body {
            height: 400px;
            display: none;
            flex-direction: column;
        }

        .chat-messages {
            flex: 1;
            padding: 15px;
            overflow-y: auto;
            max-height: 300px;
        }

        .chat-message {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
        }

        .chat-message.user {
            justify-content: flex-end;
        }

        .chat-message .message-content {
            max-width: 80%;
            padding: 10px 15px;
            border-radius: 15px;
            word-wrap: break-word;
        }

        .chat-message.user .message-content {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            border-bottom-right-radius: 5px;
        }

        .chat-message.ai .message-content {
            background: var(--bg-light);
            color: var(--text-dark);
            border-bottom-left-radius: 5px;
        }

        .chat-input {
            padding: 15px;
            border-top: 1px solid var(--border-color);
            display: flex;
            gap: 10px;
        }

        .chat-input input {
            flex: 1;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 8px 15px;
            outline: none;
        }

        .chat-input button {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border: none;
            color: white;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        @media (max-width: 768px) {
            .chat-widget {
                width: 90%;
                right: 5%;
                left: 5%;
            }

            .hero-section {
                min-height: 50vh;
                text-align: center;
            }
        }
    </style>
</head>
<body>
    <nav class="navbar navbar-expand-lg navbar-light sticky-top">
        <div class="container">
            <a class="navbar-brand" href="/">
                <i class="fas fa-blog me-2"></i><?= __('site_title') ?>
            </a>

            <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav">
                <span class="navbar-toggler-icon"></span>
            </button>

            <div class="collapse navbar-collapse" id="navbarNav">
                <ul class="navbar-nav me-auto">
                    <li class="nav-item">
                        <a class="nav-link <?= $route === '' ? 'active' : '' ?>" href="/">
                            <i class="fas fa-home me-1"></i><?= __('home') ?>
                        </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link <?= $route === 'external' ? 'active' : '' ?>" href="/?route=external">
                            <i class="fas fa-globe me-1"></i><?= __('external_blog') ?>
                        </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link <?= $route === 'internal' ? 'active' : '' ?>" href="/?route=internal">
                            <i class="fas fa-lock me-1"></i><?= __('internal_blog') ?>
                        </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link <?= $route === 'documentation' ? 'active' : '' ?>" href="/?route=documentation">
                            <i class="fas fa-book me-1"></i><?= __('documentation') ?>
                        </a>
                    </li>
                </ul>

                <div class="d-flex align-items-center gap-3">
                    <form class="search-form" method="GET">
                        <input type="hidden" name="route" value="search">
                        <input type="text" name="q" placeholder="<?= __('search') ?>..." class="form-control">
                        <button type="submit">
                            <i class="fas fa-search"></i>
                        </button>
                    </form>

                    <div class="dropdown language-selector">
                        <button class="btn dropdown-toggle" type="button" data-bs-toggle="dropdown">
                            <i class="fas fa-language me-1"></i>
                            <?= SUPPORTED_LANGUAGES[$currentLang] ?>
                        </button>
                        <ul class="dropdown-menu">
                            <?php foreach (SUPPORTED_LANGUAGES as $code => $name): ?>
                                <li>
                                    <a class="dropdown-item <?= $code === $currentLang ? 'active' : '' ?>"
                                       href="?lang=<?= $code ?>">
                                        <?= $name ?>
                                    </a>
                                </li>
                            <?php endforeach; ?>
                        </ul>
                    </div>

                    <a href="/admin/" class="btn btn-outline-primary">
                        <i class="fas fa-user-shield me-1"></i><?= __('admin') ?>
                    </a>
                </div>
            </div>
        </div>
    </nav>