diff --git a/index.php b/index.php
index cc557df..f1f46a9 100644
--- a/index.php
+++ b/index.php
@@ -18,6 +18,28 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         }
     }
 
+    if (isset($_POST['edit_customer'])) {
+        $id = (int)$_POST['id'];
+        $name = $_POST['name'] ?? '';
+        $email = $_POST['email'] ?? '';
+        $phone = $_POST['phone'] ?? '';
+        $balance = (float)($_POST['balance'] ?? 0);
+        if ($id && $name) {
+            $stmt = db()->prepare("UPDATE customers SET name = ?, email = ?, phone = ?, balance = ? WHERE id = ?");
+            $stmt->execute([$name, $email, $phone, $balance, $id]);
+            $message = "Record updated successfully!";
+        }
+    }
+
+    if (isset($_POST['delete_customer'])) {
+        $id = (int)$_POST['id'];
+        if ($id) {
+            $stmt = db()->prepare("DELETE FROM customers WHERE id = ?");
+            $stmt->execute([$id]);
+            $message = "Record deleted successfully!";
+        }
+    }
+
     if (isset($_POST['add_category'])) {
         $name_en = $_POST['name_en'] ?? '';
         $name_ar = $_POST['name_ar'] ?? '';
@@ -122,6 +144,77 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             $message = "Item updated successfully!";
         }
     }
+
+    if (isset($_POST['import_items'])) {
+        if (isset($_FILES['excel_file']) && $_FILES['excel_file']['error'] === UPLOAD_ERR_OK) {
+            $file = $_FILES['excel_file']['tmp_name'];
+            $handle = fopen($file, 'r');
+            $header = fgetcsv($handle); // Skip header row
+            
+            $count = 0;
+            while (($row = fgetcsv($handle)) !== FALSE) {
+                // Mapping: sku, eng name, arabic name, sale price, cost price
+                if (count($row) < 5) continue;
+                
+                $sku = trim($row[0]);
+                $name_en = trim($row[1]);
+                $name_ar = trim($row[2]);
+                $sale_price = (float)trim($row[3]);
+                $purchase_price = (float)trim($row[4]);
+                
+                if ($name_en && $name_ar) {
+                    // Check if SKU exists to update or insert
+                    $existingId = null;
+                    if ($sku !== "") {
+                        $check = db()->prepare("SELECT id FROM stock_items WHERE sku = ?");
+                        $check->execute([$sku]);
+                        $existingId = $check->fetchColumn();
+                    }
+                    
+                    if ($existingId) {
+                        $stmt = db()->prepare("UPDATE stock_items SET name_en = ?, name_ar = ?, sale_price = ?, purchase_price = ? WHERE id = ?");
+                        $stmt->execute([$name_en, $name_ar, $sale_price, $purchase_price, $existingId]);
+                    } else {
+                        $stmt = db()->prepare("INSERT INTO stock_items (sku, name_en, name_ar, sale_price, purchase_price) VALUES (?, ?, ?, ?, ?)");
+                        $stmt->execute([$sku, $name_en, $name_ar, $sale_price, $purchase_price]);
+                    }
+                    $count++;
+                }
+            }
+            fclose($handle);
+            $message = "$count items processed successfully!";
+        }
+    }
+
+    if (isset($_POST['add_payment_method'])) {
+        $name_en = $_POST['name_en'] ?? '';
+        $name_ar = $_POST['name_ar'] ?? '';
+        if ($name_en && $name_ar) {
+            $stmt = db()->prepare("INSERT INTO payment_methods (name_en, name_ar) VALUES (?, ?)");
+            $stmt->execute([$name_en, $name_ar]);
+            $message = "Payment method added successfully!";
+        }
+    }
+
+    if (isset($_POST['edit_payment_method'])) {
+        $id = (int)$_POST['id'];
+        $name_en = $_POST['name_en'] ?? '';
+        $name_ar = $_POST['name_ar'] ?? '';
+        if ($id && $name_en && $name_ar) {
+            $stmt = db()->prepare("UPDATE payment_methods SET name_en = ?, name_ar = ? WHERE id = ?");
+            $stmt->execute([$name_en, $name_ar, $id]);
+            $message = "Payment method updated successfully!";
+        }
+    }
+
+    if (isset($_POST['delete_payment_method'])) {
+        $id = (int)$_POST['id'];
+        if ($id) {
+            $stmt = db()->prepare("DELETE FROM payment_methods WHERE id = ?");
+            $stmt->execute([$id]);
+            $message = "Payment method deleted successfully!";
+        }
+    }
 }
 
 // Routing & Data Fetching
@@ -154,6 +247,9 @@ switch ($page) {
                                       LEFT JOIN customers s ON i.supplier_id = s.id
                                       ORDER BY i.id DESC")->fetchAll();
         break;
+    case 'payment_methods':
+        $data['payment_methods'] = db()->query("SELECT * FROM payment_methods ORDER BY id DESC")->fetchAll();
+        break;
     default:
         $data['customers'] = db()->query("SELECT * FROM customers WHERE type = 'customer' ORDER BY id DESC LIMIT 5")->fetchAll();
         // Dashboard stats
@@ -206,6 +302,9 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
         <a href="index.php?page=suppliers" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'suppliers' ? 'active' : '' ?>">
             <i class="bi bi-truck"></i> <span data-en="Suppliers" data-ar="الموردون">Suppliers</span>
         </a>
+        <a href="index.php?page=payment_methods" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'payment_methods' ? 'active' : '' ?>">
+            <i class="bi bi-credit-card"></i> <span data-en="Payment Methods" data-ar="طرق الدفع">Payment Methods</span>
+        </a>
         <a href="#" class="nav-link">
             <i class="bi bi-cart"></i> <span data-en="Sales" data-ar="المبيعات">Sales</span>
         </a>
@@ -229,6 +328,7 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                 'categories' => ['en' => 'Stock Categories', 'ar' => 'فئات المخزون'],
                 'units' => ['en' => 'Stock Units', 'ar' => 'وحدات المخزون'],
                 'items' => ['en' => 'Stock Items', 'ar' => 'أصناف المخزون'],
+                'payment_methods' => ['en' => 'Payment Methods', 'ar' => 'طرق الدفع'],
             ];
             $currTitle = $titles[$page] ?? $titles['dashboard'];
             ?>
@@ -327,6 +427,9 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                     <button class="list-group-item list-group-item-action border-0 px-0" data-bs-toggle="modal" data-bs-target="#addItemModal">
                         <i class="bi bi-box-seam text-success"></i> <span data-en="Add Item" data-ar="إضافة صنف">Add Item</span>
                     </button>
+                    <button class="list-group-item list-group-item-action border-0 px-0" data-bs-toggle="modal" data-bs-target="#importItemsModal">
+                        <i class="bi bi-file-earmark-excel text-success"></i> <span data-en="Import Items" data-ar="استيراد أصناف">Import Items</span>
+                    </button>
                     <button class="list-group-item list-group-item-action border-0 px-0">
                         <i class="bi bi-receipt text-warning"></i> <span data-en="Create Invoice" data-ar="إنشاء فاتورة">Create Invoice</span>
                     </button>
@@ -350,6 +453,7 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                         <th data-en="Email" data-ar="البريد">Email</th>
                         <th data-en="Phone" data-ar="الهاتف">Phone</th>
                         <th data-en="Balance" data-ar="الرصيد" class="text-end">Balance</th>
+                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
                     </tr>
                 </thead>
                 <tbody>
@@ -359,6 +463,54 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                         <td><?= htmlspecialchars($c['email']) ?></td>
                         <td><?= htmlspecialchars($c['phone']) ?></td>
                         <td class="text-end">$<?= number_format((float)$c['balance'], 2) ?></td>
+                        <td class="text-end">
+                            <div class="btn-group btn-group-sm">
+                                <button class="btn btn-outline-primary" title="Edit" data-bs-toggle="modal" data-bs-target="#editCustomerModal<?= $c['id'] ?>"><i class="bi bi-pencil"></i></button>
+                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
+                                    <input type="hidden" name="id" value="<?= $c['id'] ?>">
+                                    <button type="submit" name="delete_customer" class="btn btn-outline-danger" title="Delete"><i class="bi bi-trash"></i></button>
+                                </form>
+                            </div>
+
+                            <!-- Edit Customer Modal -->
+                            <div class="modal fade" id="editCustomerModal<?= $c['id'] ?>" tabindex="-1">
+                                <div class="modal-dialog">
+                                    <div class="modal-content border-0 shadow text-start">
+                                        <div class="modal-header">
+                                            <h5 class="modal-title">
+                                                <span data-en="Edit <?= $currTitle['en'] ?>" data-ar="تعديل <?= $currTitle['ar'] ?>">Edit <?= $currTitle['en'] ?></span>
+                                            </h5>
+                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+                                        </div>
+                                        <form method="POST">
+                                            <input type="hidden" name="id" value="<?= $c['id'] ?>">
+                                            <div class="modal-body">
+                                                <div class="mb-3">
+                                                    <label class="form-label" data-en="Name" data-ar="الاسم">Name</label>
+                                                    <input type="text" name="name" class="form-control" value="<?= htmlspecialchars($c['name']) ?>" required>
+                                                </div>
+                                                <div class="mb-3">
+                                                    <label class="form-label" data-en="Email" data-ar="البريد الإلكتروني">Email</label>
+                                                    <input type="email" name="email" class="form-control" value="<?= htmlspecialchars($c['email'] ?? '') ?>">
+                                                </div>
+                                                <div class="mb-3">
+                                                    <label class="form-label" data-en="Phone" data-ar="الهاتف">Phone</label>
+                                                    <input type="text" name="phone" class="form-control" value="<?= htmlspecialchars($c['phone'] ?? '') ?>">
+                                                </div>
+                                                <div class="mb-3">
+                                                    <label class="form-label" data-en="Balance" data-ar="الرصيد">Balance</label>
+                                                    <input type="number" step="0.01" name="balance" class="form-control" value="<?= (float)$c['balance'] ?>">
+                                                </div>
+                                            </div>
+                                            <div class="modal-footer">
+                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
+                                                <button type="submit" name="edit_customer" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
+                                            </div>
+                                        </form>
+                                    </div>
+                                </div>
+                            </div>
+                        </td>
                     </tr>
                     <?php endforeach; ?>
                 </tbody>
@@ -432,9 +584,14 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
     <div class="card p-4">
         <div class="d-flex justify-content-between align-items-center mb-4">
             <h5 class="m-0" data-en="Stock Items" data-ar="أصناف المخزون">Stock Items</h5>
-            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addItemModal">
-                <i class="bi bi-plus-lg"></i> <span data-en="Add Item" data-ar="إضافة صنف">Add Item</span>
-            </button>
+            <div>
+                <button class="btn btn-outline-success me-2" data-bs-toggle="modal" data-bs-target="#importItemsModal">
+                    <i class="bi bi-file-earmark-excel"></i> <span data-en="Import Excel" data-ar="استيراد من اكسل">Import Excel</span>
+                </button>
+                <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addItemModal">
+                    <i class="bi bi-plus-lg"></i> <span data-en="Add Item" data-ar="إضافة صنف">Add Item</span>
+                </button>
+            </div>
         </div>
         <div class="table-responsive">
             <table class="table table-hover align-middle">
@@ -621,6 +778,102 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
             </table>
         </div>
     </div>
+    <?php elseif ($page === 'payment_methods'): ?>
+    <div class="card p-4">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h5 class="m-0" data-en="Payment Methods" data-ar="طرق الدفع">Payment Methods</h5>
+            <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addPaymentMethodModal">
+                <i class="bi bi-plus-lg"></i> <span data-en="Add Payment Method" data-ar="إضافة طريقة دفع">Add Payment Method</span>
+            </button>
+        </div>
+        <div class="table-responsive">
+            <table class="table table-hover align-middle">
+                <thead>
+                    <tr>
+                        <th data-en="ID" data-ar="المعرف">ID</th>
+                        <th data-en="Name (EN)" data-ar="الاسم (EN)">Name (EN)</th>
+                        <th data-en="Name (AR)" data-ar="الاسم (AR)">Name (AR)</th>
+                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    <?php foreach ($data['payment_methods'] as $pm): ?>
+                    <tr>
+                        <td><?= $pm['id'] ?></td>
+                        <td><?= htmlspecialchars($pm['name_en'] ?? '') ?></td>
+                        <td><?= htmlspecialchars($pm['name_ar'] ?? '') ?></td>
+                        <td class="text-end">
+                            <div class="btn-group btn-group-sm">
+                                <button class="btn btn-outline-primary" title="Edit" data-bs-toggle="modal" data-bs-target="#editPaymentMethodModal<?= $pm['id'] ?>"><i class="bi bi-pencil"></i></button>
+                                <form method="POST" class="d-inline" onsubmit="return confirm('Are you sure?')">
+                                    <input type="hidden" name="id" value="<?= $pm['id'] ?>">
+                                    <button type="submit" name="delete_payment_method" class="btn btn-outline-danger" title="Delete"><i class="bi bi-trash"></i></button>
+                                </form>
+                            </div>
+
+                            <!-- Edit Payment Method Modal -->
+                            <div class="modal fade" id="editPaymentMethodModal<?= $pm['id'] ?>" tabindex="-1">
+                                <div class="modal-dialog">
+                                    <div class="modal-content border-0 shadow text-start">
+                                        <div class="modal-header">
+                                            <h5 class="modal-title" data-en="Edit Payment Method" data-ar="تعديل طريقة الدفع">Edit Payment Method</h5>
+                                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+                                        </div>
+                                        <form method="POST">
+                                            <input type="hidden" name="id" value="<?= $pm['id'] ?>">
+                                            <div class="modal-body">
+                                                <div class="mb-3">
+                                                    <label class="form-label" data-en="Name (EN)" data-ar="الاسم (EN)">Name (EN)</label>
+                                                    <input type="text" name="name_en" class="form-control" value="<?= htmlspecialchars($pm['name_en'] ?? '') ?>" required>
+                                                </div>
+                                                <div class="mb-3">
+                                                    <label class="form-label" data-en="Name (AR)" data-ar="الاسم (AR)">Name (AR)</label>
+                                                    <input type="text" name="name_ar" class="form-control" value="<?= htmlspecialchars($pm['name_ar'] ?? '') ?>" required>
+                                                </div>
+                                            </div>
+                                            <div class="modal-footer">
+                                                <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
+                                                <button type="submit" name="edit_payment_method" class="btn btn-primary" data-en="Update" data-ar="تحديث">Update</button>
+                                            </div>
+                                        </form>
+                                    </div>
+                                </div>
+                            </div>
+                        </td>
+                    </tr>
+                    <?php endforeach; ?>
+                </tbody>
+            </table>
+        </div>
+    </div>
+
+    <!-- Add Payment Method Modal -->
+    <div class="modal fade" id="addPaymentMethodModal" tabindex="-1">
+        <div class="modal-dialog">
+            <div class="modal-content border-0 shadow">
+                <div class="modal-header">
+                    <h5 class="modal-title" data-en="Add Payment Method" data-ar="إضافة طريقة دفع">Add Payment Method</h5>
+                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+                </div>
+                <form method="POST">
+                    <div class="modal-body">
+                        <div class="mb-3">
+                            <label class="form-label" data-en="Name (EN)" data-ar="الاسم (EN)">Name (EN)</label>
+                            <input type="text" name="name_en" class="form-control" required>
+                        </div>
+                        <div class="mb-3">
+                            <label class="form-label" data-en="Name (AR)" data-ar="الاسم (AR)">Name (AR)</label>
+                            <input type="text" name="name_ar" class="form-control" required>
+                        </div>
+                    </div>
+                    <div class="modal-footer">
+                        <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
+                        <button type="submit" name="add_payment_method" class="btn btn-primary" data-en="Save" data-ar="حفظ">Save</button>
+                    </div>
+                </form>
+            </div>
+        </div>
+    </div>
     <?php endif; ?>
 </div>
 
@@ -761,6 +1014,35 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
     </div>
 </div>
 
+<!-- Import Items Modal -->
+<div class="modal fade" id="importItemsModal" tabindex="-1">
+    <div class="modal-dialog">
+        <div class="modal-content border-0 shadow text-start">
+            <div class="modal-header">
+                <h5 class="modal-title" data-en="Import Items from Excel (CSV)" data-ar="استيراد الأصناف من اكسل (CSV)">Import Items from Excel (CSV)</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+            </div>
+            <form method="POST" enctype="multipart/form-data">
+                <div class="modal-body">
+                    <div class="alert alert-info py-2">
+                        <small data-en="Please upload a CSV file with the following columns: SKU, English Name, Arabic Name, Sale Price, Cost Price." data-ar="يرجى رفع ملف CSV بالأعمدة التالية: الباركود، الاسم الإنجليزي، الاسم العربي، سعر البيع، سعر التكلفة.">
+                            Please upload a CSV file with the following columns: SKU, English Name, Arabic Name, Sale Price, Cost Price.
+                        </small>
+                    </div>
+                    <div class="mb-3">
+                        <label class="form-label" data-en="Choose CSV File" data-ar="اختر ملف CSV">Choose CSV File</label>
+                        <input type="file" name="excel_file" class="form-control" accept=".csv" required>
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button type="button" class="btn btn-light" data-bs-dismiss="modal" data-en="Cancel" data-ar="إلغاء">Cancel</button>
+                    <button type="submit" name="import_items" class="btn btn-success" data-en="Import Now" data-ar="استيراد الآن">Import Now</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
+
 <!-- Add Category Modal -->
 <div class="modal fade" id="addCategoryModal" tabindex="-1">
     <div class="modal-dialog">