diff --git a/admin/edit_product.php b/admin/edit_product.php
index 6af4bcc..c9f8f56 100644
--- a/admin/edit_product.php
+++ b/admin/edit_product.php
@@ -50,6 +50,29 @@ if (isset($_GET['delete_document']) && isset($_GET['id'])) {
     exit;
 }
 
+// Handle material deletion
+if (isset($_GET['delete_material']) && isset($_GET['id'])) {
+    $material_id_to_delete = $_GET['delete_material'];
+    $product_id_for_redirect = $_GET['id'];
+
+    $material_stmt = $pdo->prepare("SELECT path FROM product_materials WHERE id = ? AND product_id = ?");
+    $material_stmt->execute([$material_id_to_delete, $product_id_for_redirect]);
+    $material_to_delete = $material_stmt->fetch(PDO::FETCH_ASSOC);
+
+    if ($material_to_delete && !empty($material_to_delete['path'])) {
+        $file_path = __DIR__ . '/../uploads/products/' . $material_to_delete['path'];
+        if (file_exists($file_path)) {
+            unlink($file_path);
+        }
+    }
+
+    $delete_stmt = $pdo->prepare("DELETE FROM product_materials WHERE id = ?");
+    $delete_stmt->execute([$material_id_to_delete]);
+
+    header('Location: edit_product.php?id=' . $product_id_for_redirect);
+    exit;
+}
+
 
 $product = [
     'id' => null,
@@ -104,6 +127,11 @@ if (isset($_GET['id'])) {
     $docs_stmt->execute([$product_id]);
     $product_documents = $docs_stmt->fetchAll(PDO::FETCH_ASSOC);
 
+    // Fetch product materials
+    $materials_stmt = $pdo->prepare("SELECT * FROM product_materials WHERE product_id = ?");
+    $materials_stmt->execute([$product_id]);
+    $product_materials = $materials_stmt->fetchAll(PDO::FETCH_ASSOC);
+
 
 }
 
@@ -244,6 +272,60 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                 }
             }
 
+            // Handle material uploads
+            if (isset($_POST['material_type']) && !empty($_POST['material_type'])) {
+                $material_type = $_POST['material_type'];
+                $material_title = $_POST['material_title'] ?? '';
+                $material_errors = [];
+
+                if (empty($material_title)) {
+                    $material_errors[] = 'Tytuł materiału jest wymagany.';
+                }
+
+                if ($material_type === 'youtube') {
+                    $material_url = $_POST['material_url'] ?? '';
+                    if (empty($material_url) || !filter_var($material_url, FILTER_VALIDATE_URL)) {
+                        $material_errors[] = 'Nieprawidłowy adres URL YouTube.';
+                    } else {
+                        $material_stmt = $pdo->prepare("INSERT INTO product_materials (product_id, material_type, title, url) VALUES (?, ?, ?, ?)");
+                        $material_stmt->execute([$product_id, $material_type, $material_title, $material_url]);
+                    }
+                } else { // pdf or image
+                    if (isset($_FILES['material_file']) && $_FILES['material_file']['error'] === UPLOAD_ERR_OK) {
+                        $allowed_types = ['application/pdf', 'image/jpeg', 'image/png'];
+                        $file_type = mime_content_type($_FILES['material_file']['tmp_name']);
+
+                        if (in_array($file_type, $allowed_types)) {
+                            $upload_dir = __DIR__ . '/../uploads/products/' . $product_id . '/materials/';
+                            if (!is_dir($upload_dir)) {
+                                mkdir($upload_dir, 0777, true);
+                            }
+                            $file_ext = pathinfo($_FILES['material_file']['name'], PATHINFO_EXTENSION);
+                            $file_name = uniqid('mat_' . $product_id . '_', true) . '.' . $file_ext;
+                            $destination = $upload_dir . $file_name;
+
+                            if (move_uploaded_file($_FILES['material_file']['tmp_name'], $destination)) {
+                                $material_stmt = $pdo->prepare("INSERT INTO product_materials (product_id, material_type, title, path) VALUES (?, ?, ?, ?)");
+                                $material_stmt->execute([$product_id, $material_type, $material_title, $product_id . '/materials/' . $file_name]);
+                            } else {
+                                $material_errors[] = "Nie udało się przenieść pliku materiału.";
+                            }
+                        } else {
+                            $material_errors[] = "Niedozwolony typ pliku materiału.";
+                        }
+                    } else {
+                        $material_errors[] = "Błąd podczas przesyłania pliku materiału.";
+                    }
+                }
+
+                if (!empty($material_errors)) {
+                    $errors = array_merge($errors, $material_errors);
+                    if ($pdo->inTransaction()) $pdo->rollBack();
+                    goto end_of_post_handling;
+                }
+            }
+
+
 
 
             $clear_stmt = $pdo->prepare("DELETE FROM product_attributes WHERE product_id = ?");
@@ -418,12 +500,60 @@ $page_title = $product['id'] ? 'Edytuj produkt' : 'Dodaj produkt';
             endif; ?>
         </div>
 
+        <div class="card card-body mb-4">
+            <h5>Dodatkowe materiały</h5>
+            <div class="mb-3">
+                <label for="material_type" class="form-label">Typ materiału</label>
+                <select name="material_type" id="material_type" class="form-select">
+                    <option value="">-- Wybierz typ --</option>
+                    <option value="pdf">PDF</option>
+                    <option value="image">Zdjęcie</option>
+                    <option value="youtube">YouTube</option>
+                </select>
+            </div>
+            <div class="mb-3">
+                <label for="material_title" class="form-label">Tytuł</label>
+                <input type="text" class="form-control" id="material_title" name="material_title">
+            </div>
+            <div class="mb-3" id="material_file_div">
+                <label for="material_file" class="form-label">Plik</label>
+                <input type="file" class="form-control" id="material_file" name="material_file">
+            </div>
+            <div class="mb-3" id="material_url_div" style="display: none;">
+                <label for="material_url" class="form-label">URL</label>
+                <input type="url" class="form-control" id="material_url" name="material_url">
+            </div>
+            <?php if (!empty($product_materials)):
+            echo '<ul class="list-group">';
+            foreach($product_materials as $material) {
+                echo '<li class="list-group-item d-flex justify-content-between align-items-center">';
+                echo htmlspecialchars($material['title']) . ' (' . htmlspecialchars($material['material_type']) . ')';
+                echo '<a href="edit_product.php?id=' . htmlspecialchars($product['id']) . '&delete_material=' . htmlspecialchars($material['id']) . '" class="btn btn-danger btn-sm" onclick="return confirm(\'Czy na pewno chcesz usunąć ten materiał?\');">Usuń</a>';
+                echo '</li>';
+            }
+            echo '</ul>';
+            endif; ?>
+        </div>
+
         <div class="mt-4">
             <button type="submit" class="btn btn-primary">Zapisz</button>
             <a href="products.php" class="btn btn-secondary">Anuluj</a>
         </div>
     </form>
 </main>
+<script>
+document.getElementById('material_type').addEventListener('change', function() {
+    var fileDiv = document.getElementById('material_file_div');
+    var urlDiv = document.getElementById('material_url_div');
+    if (this.value === 'youtube') {
+        fileDiv.style.display = 'none';
+        urlDiv.style.display = 'block';
+    } else {
+        fileDiv.style.display = 'block';
+        urlDiv.style.display = 'none';
+    }
+});
+</script>
 <?php require_once __DIR__ . '/../includes/footer.php'; ?>
 </body>
 </html>
\ No newline at end of file
diff --git a/db/migrate.php b/db/migrate.php
index 87e38a9..8591942 100644
--- a/db/migrate.php
+++ b/db/migrate.php
@@ -33,8 +33,6 @@ foreach ($all_files as $file) {
         echo "Applying migration: $filename\n";
         
         try {
-            $pdo->beginTransaction();
-            
             $sql = file_get_contents($file);
             $pdo->exec($sql);
             
@@ -42,13 +40,9 @@ foreach ($all_files as $file) {
             $stmt = $pdo->prepare("INSERT INTO schema_migrations (version) VALUES (?)");
             $stmt->execute([$filename]);
             
-            $pdo->commit();
             echo "  Success.\n";
 
         } catch (PDOException $e) {
-            if ($pdo->inTransaction()) {
-                $pdo->rollBack();
-            }
             echo "  Error applying migration $filename: " . $e->getMessage() . "\n";
             // Stop on first error
             break;
diff --git a/db/migrations/038_create_product_materials_table.sql b/db/migrations/038_create_product_materials_table.sql
new file mode 100644
index 0000000..ce44836
--- /dev/null
+++ b/db/migrations/038_create_product_materials_table.sql
@@ -0,0 +1,11 @@
+CREATE TABLE IF NOT EXISTS `product_materials` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `product_id` INT NOT NULL,
+    `material_type` ENUM('pdf', 'image', 'youtube') NOT NULL,
+    `title` VARCHAR(255) NOT NULL,
+    `path` VARCHAR(255),
+    `url` VARCHAR(255),
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (`product_id`) REFERENCES `products`(`id`) ON DELETE CASCADE
+);
diff --git a/debug_price.log b/debug_price.log
index e4ecb4a..5eed4b5 100644
--- a/debug_price.log
+++ b/debug_price.log
@@ -14864,3 +14864,318 @@ Product price query executed. Found: {"price_net":"233.20","price_gross":"286.84
 Found product price. Net: 233.2, Gross: 286.84
 FINAL: Returning Net: 233.2, Gross: 286.84
 ---
+---
+START getEffectivePrice for product 1, client 1
+Client price query executed. Found: {"price_net":"837.40","price_gross":"1030.00"}
+Found client price. Net: 837.4, Gross: 1030
+FINAL: Returning Net: 837.4, Gross: 1030
+---
+---
+START getEffectivePrice for product 2, client 1
+Client price query executed. Found: {"price_net":"1056.91","price_gross":"1300.00"}
+Found client price. Net: 1056.91, Gross: 1300
+FINAL: Returning Net: 1056.91, Gross: 1300
+---
+---
+START getEffectivePrice for product 3, client 1
+Client price query executed. Found: {"price_net":"32.52","price_gross":"40.00"}
+Found client price. Net: 32.52, Gross: 40
+FINAL: Returning Net: 32.52, Gross: 40
+---
+---
+START getEffectivePrice for product 4, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 5, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"68.00","price_gross":"83.64"}
+Found product price. Net: 68, Gross: 83.64
+FINAL: Returning Net: 68, Gross: 83.64
+---
+---
+START getEffectivePrice for product 6, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"171.60","price_gross":"211.07"}
+Found product price. Net: 171.6, Gross: 211.07
+FINAL: Returning Net: 171.6, Gross: 211.07
+---
+---
+START getEffectivePrice for product 7, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"233.20","price_gross":"286.84"}
+Found product price. Net: 233.2, Gross: 286.84
+FINAL: Returning Net: 233.2, Gross: 286.84
+---
+---
+START getEffectivePrice for product 1, client 1
+Client price query executed. Found: {"price_net":"837.40","price_gross":"1030.00"}
+Found client price. Net: 837.4, Gross: 1030
+FINAL: Returning Net: 837.4, Gross: 1030
+---
+---
+START getEffectivePrice for product 2, client 1
+Client price query executed. Found: {"price_net":"1056.91","price_gross":"1300.00"}
+Found client price. Net: 1056.91, Gross: 1300
+FINAL: Returning Net: 1056.91, Gross: 1300
+---
+---
+START getEffectivePrice for product 3, client 1
+Client price query executed. Found: {"price_net":"32.52","price_gross":"40.00"}
+Found client price. Net: 32.52, Gross: 40
+FINAL: Returning Net: 32.52, Gross: 40
+---
+---
+START getEffectivePrice for product 4, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 5, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"68.00","price_gross":"83.64"}
+Found product price. Net: 68, Gross: 83.64
+FINAL: Returning Net: 68, Gross: 83.64
+---
+---
+START getEffectivePrice for product 6, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"171.60","price_gross":"211.07"}
+Found product price. Net: 171.6, Gross: 211.07
+FINAL: Returning Net: 171.6, Gross: 211.07
+---
+---
+START getEffectivePrice for product 7, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"233.20","price_gross":"286.84"}
+Found product price. Net: 233.2, Gross: 286.84
+FINAL: Returning Net: 233.2, Gross: 286.84
+---
+---
+START getEffectivePrice for product 1, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"1111.00","price_gross":"1366.53"}
+Found product price. Net: 1111, Gross: 1366.53
+FINAL: Returning Net: 1111, Gross: 1366.53
+---
+---
+START getEffectivePrice for product 2, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"1318.05","price_gross":"1621.20"}
+Found product price. Net: 1318.05, Gross: 1621.2
+FINAL: Returning Net: 1318.05, Gross: 1621.2
+---
+---
+START getEffectivePrice for product 3, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 4, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 5, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"68.00","price_gross":"83.64"}
+Found product price. Net: 68, Gross: 83.64
+FINAL: Returning Net: 68, Gross: 83.64
+---
+---
+START getEffectivePrice for product 6, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"171.60","price_gross":"211.07"}
+Found product price. Net: 171.6, Gross: 211.07
+FINAL: Returning Net: 171.6, Gross: 211.07
+---
+---
+START getEffectivePrice for product 7, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"233.20","price_gross":"286.84"}
+Found product price. Net: 233.2, Gross: 286.84
+FINAL: Returning Net: 233.2, Gross: 286.84
+---
+---
+START getEffectivePrice for product 2, client 1
+Client price query executed. Found: {"price_net":"1056.91","price_gross":"1300.00"}
+Found client price. Net: 1056.91, Gross: 1300
+FINAL: Returning Net: 1056.91, Gross: 1300
+---
+---
+START getEffectivePrice for product 1, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"1111.00","price_gross":"1366.53"}
+Found product price. Net: 1111, Gross: 1366.53
+FINAL: Returning Net: 1111, Gross: 1366.53
+---
+---
+START getEffectivePrice for product 2, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"1318.05","price_gross":"1621.20"}
+Found product price. Net: 1318.05, Gross: 1621.2
+FINAL: Returning Net: 1318.05, Gross: 1621.2
+---
+---
+START getEffectivePrice for product 3, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 4, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 5, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"68.00","price_gross":"83.64"}
+Found product price. Net: 68, Gross: 83.64
+FINAL: Returning Net: 68, Gross: 83.64
+---
+---
+START getEffectivePrice for product 6, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"171.60","price_gross":"211.07"}
+Found product price. Net: 171.6, Gross: 211.07
+FINAL: Returning Net: 171.6, Gross: 211.07
+---
+---
+START getEffectivePrice for product 7, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"233.20","price_gross":"286.84"}
+Found product price. Net: 233.2, Gross: 286.84
+FINAL: Returning Net: 233.2, Gross: 286.84
+---
+---
+START getEffectivePrice for product 2, client 1
+Client price query executed. Found: {"price_net":"1056.91","price_gross":"1300.00"}
+Found client price. Net: 1056.91, Gross: 1300
+FINAL: Returning Net: 1056.91, Gross: 1300
+---
+---
+START getEffectivePrice for product 1, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"1111.00","price_gross":"1366.53"}
+Found product price. Net: 1111, Gross: 1366.53
+FINAL: Returning Net: 1111, Gross: 1366.53
+---
+---
+START getEffectivePrice for product 2, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"1318.05","price_gross":"1621.20"}
+Found product price. Net: 1318.05, Gross: 1621.2
+FINAL: Returning Net: 1318.05, Gross: 1621.2
+---
+---
+START getEffectivePrice for product 3, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 4, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 5, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"68.00","price_gross":"83.64"}
+Found product price. Net: 68, Gross: 83.64
+FINAL: Returning Net: 68, Gross: 83.64
+---
+---
+START getEffectivePrice for product 6, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"171.60","price_gross":"211.07"}
+Found product price. Net: 171.6, Gross: 211.07
+FINAL: Returning Net: 171.6, Gross: 211.07
+---
+---
+START getEffectivePrice for product 7, client 
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"233.20","price_gross":"286.84"}
+Found product price. Net: 233.2, Gross: 286.84
+FINAL: Returning Net: 233.2, Gross: 286.84
+---
+---
+START getEffectivePrice for product 1, client 1
+Client price query executed. Found: {"price_net":"837.40","price_gross":"1030.00"}
+Found client price. Net: 837.4, Gross: 1030
+FINAL: Returning Net: 837.4, Gross: 1030
+---
+---
+START getEffectivePrice for product 2, client 1
+Client price query executed. Found: {"price_net":"1056.91","price_gross":"1300.00"}
+Found client price. Net: 1056.91, Gross: 1300
+FINAL: Returning Net: 1056.91, Gross: 1300
+---
+---
+START getEffectivePrice for product 3, client 1
+Client price query executed. Found: {"price_net":"32.52","price_gross":"40.00"}
+Found client price. Net: 32.52, Gross: 40
+FINAL: Returning Net: 32.52, Gross: 40
+---
+---
+START getEffectivePrice for product 4, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"9.95","price_gross":"12.24"}
+Found product price. Net: 9.95, Gross: 12.24
+FINAL: Returning Net: 9.95, Gross: 12.24
+---
+---
+START getEffectivePrice for product 5, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"68.00","price_gross":"83.64"}
+Found product price. Net: 68, Gross: 83.64
+FINAL: Returning Net: 68, Gross: 83.64
+---
+---
+START getEffectivePrice for product 6, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"171.60","price_gross":"211.07"}
+Found product price. Net: 171.6, Gross: 211.07
+FINAL: Returning Net: 171.6, Gross: 211.07
+---
+---
+START getEffectivePrice for product 7, client 1
+Client price query executed. Found: No
+Client price not found or not set, falling back to product price.
+Product price query executed. Found: {"price_net":"233.20","price_gross":"286.84"}
+Found product price. Net: 233.2, Gross: 286.84
+FINAL: Returning Net: 233.2, Gross: 286.84
+---
+---
+START getEffectivePrice for product 1, client 1
+Client price query executed. Found: {"price_net":"837.40","price_gross":"1030.00"}
+Found client price. Net: 837.4, Gross: 1030
+FINAL: Returning Net: 837.4, Gross: 1030
+---
diff --git a/includes/i18n.php b/includes/i18n.php
index 128c537..bb58bd3 100644
--- a/includes/i18n.php
+++ b/includes/i18n.php
@@ -204,6 +204,9 @@ $translations = [
         'pdf_product' => 'Produkt',
         'pdf_quantity' => 'Ilość',
         'pdf_price' => 'Cena',
+        'additional_materials_tab' => 'Wytyczne projektowe i dla wykonawców',
+        'no_additional_materials' => 'Brak dodatkowych materiałów.',
+        'invalid_youtube_url' => 'Nieprawidłowy adres URL YouTube.',
     ],
     'en' => [
         'login_header' => 'Login',
@@ -405,6 +408,9 @@ $translations = [
         'pdf_product' => 'Product',
         'pdf_quantity' => 'Quantity',
         'pdf_price' => 'Price',
+        'additional_materials_tab' => 'Additional Materials',
+        'no_additional_materials' => 'No additional materials available.',
+        'invalid_youtube_url' => 'Invalid YouTube URL.',
     ],
 ];
 
diff --git a/product.php b/product.php
index 1cdf399..48c0b67 100644
--- a/product.php
+++ b/product.php
@@ -30,6 +30,11 @@ try {
     $product_images = $img_stmt->fetchAll(PDO::FETCH_ASSOC);
     $primary_image = $product_images[0] ?? null;
 
+    // Fetch product materials
+    $materials_stmt = $pdo->prepare("SELECT * FROM product_materials WHERE product_id = ? ORDER BY created_at ASC");
+    $materials_stmt->execute([$product_id]);
+    $product_materials = $materials_stmt->fetchAll(PDO::FETCH_ASSOC);
+
 } catch (PDOException $e) {
     die(t('db_connection_error') . $e->getMessage());
 }
@@ -110,6 +115,9 @@ require_once __DIR__ . '/includes/header.php';
                 <li class="nav-item" role="presentation">
                     <button class="nav-link" id="related-tab" data-bs-toggle="tab" data-bs-target="#related" type="button" role="tab" aria-controls="related" aria-selected="false"><?= t('related_products_tab') ?></button>
                 </li>
+                <li class="nav-item" role="presentation">
+                    <button class="nav-link" id="materials-tab" data-bs-toggle="tab" data-bs-target="#materials" type="button" role="tab" aria-controls="materials" aria-selected="false"><?= t('additional_materials_tab') ?></button>
+                </li>
             </ul>
             <div class="tab-content p-3 border border-top-0" id="productTabsContent">
                 <div class="tab-pane fade show active" id="description" role="tabpanel" aria-labelledby="description-tab">
@@ -190,6 +198,40 @@ require_once __DIR__ . '/includes/header.php';
                     ?>
                     </div>
                 </div>
+                <div class="tab-pane fade" id="materials" role="tabpanel" aria-labelledby="materials-tab">
+                    <?php
+                    if ($product_materials) {
+                        echo '<div class="list-group list-group-flush">';
+                        foreach ($product_materials as $material) {
+                            echo '<div class="list-group-item">';
+                            echo '<h5>' . htmlspecialchars($material['title']) . '</h5>';
+                            switch ($material['material_type']) {
+                                case 'pdf':
+                                    echo '<a href="' . BASE_URL . 'uploads/products/' . htmlspecialchars($material['path']) . '" download><i class="bi bi-file-earmark-arrow-down"></i> Pobierz PDF</a>';
+                                    break;
+                                case 'image':
+                                    echo '<img src="' . BASE_URL . 'uploads/products/' . htmlspecialchars($material['path']) . '" class="img-fluid rounded shadow-sm">';
+                                    break;
+                                case 'youtube':
+                                    $video_id = '';
+                                    if (preg_match('/(?:https?:\/\/)?(?:www\.)?(?:youtube\.com\/(?:embed\/|watch\?v=)|youtu\.be\/)([a-zA-Z0-9_-]{11})/', $material['url'], $matches)) {
+                                        $video_id = $matches[1];
+                                    }
+                                    if ($video_id) {
+                                        echo '<div class="ratio ratio-16x9"><iframe src="https://www.youtube.com/embed/' . $video_id . '" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></div>';
+                                    } else {
+                                        echo '<p>' . t('invalid_youtube_url') . '</p>';
+                                    }
+                                    break;
+                            }
+                            echo '</div>';
+                        }
+                        echo '</div>';
+                    } else {
+                        echo '<p class="mb-0">' . t('no_additional_materials') . '</p>';
+                    }
+                    ?>
+                </div>
             </div>
         </div>
     </main>
diff --git a/uploads/products/1/materials/mat_1_6960f4a16e9324.95735517.pdf b/uploads/products/1/materials/mat_1_6960f4a16e9324.95735517.pdf
new file mode 100644
index 0000000..f288936
Binary files /dev/null and b/uploads/products/1/materials/mat_1_6960f4a16e9324.95735517.pdf differ