function renderProductCard($product, $t) {
    if (empty($product)) {
        return '';
    }
    
    // Recupera la recensione SmartVibe dal database
    $db = getDB();
    $review = null;
    $result = $db->query("SELECT * FROM reviews WHERE product_id = " . $product['id'] . " AND is_smartvibe = 1 LIMIT 1");
    if ($result && $result->num_rows > 0) {
        $review = $result->fetch_assoc();
    }
    
    $badgeMap = [
        'Amazon Choice' => $t['amazon_choice'] ?? 'Amazon Choice',
        'Top vendite' => $t['top_seller'] ?? 'Top seller',
        'Affiliato' => $t['affiliate_badge'] ?? 'Affiliate',
        'Dropshipping' => $t['dropshipping_badge'] ?? 'Dropshipping'
    ];
    
    $badge = $badgeMap[$product['badge'] ?? ''] ?? $product['badge'] ?? '';
    
    $html = '<div class="product-card" data-id="' . $product['id'] . '">';
    
    if ($badge) {
        $html .= '<span class="badge-aff">' . htmlspecialchars($badge) . '</span>';
    }
    
    $image = $product['image'] ?? 'https://placehold.co/300x300/EAEDED/333?text=Prodotto';
    $html .= '<img src="' . htmlspecialchars($image) . '" alt="' . htmlspecialchars($product['name']) . '" class="product-image">';
    $html .= '<h3 class="product-title">' . htmlspecialchars($product['name']) . '</h3>';
    
    // ============================================
    // PREZZO
    // ============================================
    $html .= '<div class="price">€' . number_format($product['price'] ?? 0, 2);
    if (!empty($product['old_price'])) {
        $html .= ' <span class="old-price">€' . number_format($product['old_price'], 2) . '</span>';
    }
    $html .= '</div>';
    
    // ============================================
    // PRIME
    // ============================================
    if (!empty($product['prime'])) {
        $html .= '<div class="prime"><i class="fas fa-check-circle"></i> ' . ($t['prime_shipping'] ?? 'Prime | spedizione 1gg') . '</div>';
    }
    
    // ============================================
    // PULSANTE AGGIUNGI AL CARRELLO
    // ============================================
    $html .= '<button class="btn-add" onclick="addToCart(' . $product['id'] . ')">';
    $html .= '<i class="fas fa-shopping-cart"></i> ' . ($t['add_to_cart'] ?? 'Aggiungi al carrello');
    $html .= '</button>';
    
    // ============================================
    // PULSANTE ACQUISTA SU AMAZON (Affiliazione)
    // ============================================
    if (!empty($product['type']) && $product['type'] === 'affiliate' && !empty($product['affiliate_url'])) {
        $html .= '<a href="' . htmlspecialchars($product['affiliate_url']) . '" target="_blank" class="btn-affiliate">';
        $html .= '<i class="fas fa-link"></i> ' . ($t['buy_on_amazon'] ?? 'Acquista su Amazon');
        $html .= '</a>';
    }
    
    // ============================================
    // 🔥 PULSANTE RECENSIONE SMARTVIBE (INVECE DELLE STELLE)
    // ============================================
    if ($review) {
        // Mostra il pulsante con il titolo della recensione
        $reviewTitle = htmlspecialchars($review['title'] ?? 'Recensione SmartVibe');
        $reviewRating = floatval($review['rating'] ?? 4.7);
        $stars = str_repeat('★', round($reviewRating)) . str_repeat('☆', 5 - round($reviewRating));
        
        $html .= '<a href="/product-review.php?id=' . $product['id'] . '" class="btn-review-smartvibe">';
        $html .= '<i class="fas fa-star" style="color:#FF9900;"></i> ';
        $html .= '<span class="review-label">📖 ' . $reviewTitle . '</span>';
        $html .= ' <span class="review-rating">' . $stars . ' ' . number_format($reviewRating, 1) . '</span>';
        $html .= '</a>';
    } else {
        // Se non c'è recensione, mostra un pulsante per generarla
        $html .= '<a href="/backend/import-amazon-rapidapi.php?input=' . $product['id'] . '" class="btn-review-smartvibe" style="background:#6c757d;color:white;">';
        $html .= '<i class="fas fa-sync"></i> Genera recensione';
        $html .= '</a>';
    }
    
    $html .= '</div>';
    
    return $html;
}<!DOCTYPE html>
<html lang="it">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>SmartVibe.tech - Benvenuto su</title>
    <link rel="manifest" href="/manifest.json">
    <link rel="stylesheet" href="/style.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    
    <!-- SEO Meta -->
    <meta name="description" content="Dropshipping e affiliazioni Amazon & partner. I migliori prodotti selezionati per te.">
    <meta name="keywords" content="dropshipping, affiliazioni, amazon, smartvibe, ecommerce">
    <link rel="canonical" href="<br />
<b>Fatal error</b>:  Uncaught Error: Undefined constant &quot;SITE_URL&quot; in /home/u251571533/domains/smartvibe.tech/public_html/includes/header.php:14
Stack trace:
#0 /home/u251571533/domains/smartvibe.tech/public_html/index.php(21): require_once()
#1 {main}
  thrown in <b>/home/u251571533/domains/smartvibe.tech/public_html/includes/header.php</b> on line <b>14</b><br />