diff --git a/app/Filament/Resources/DelayedGoods/Schemas/DelayedGoodForm.php b/app/Filament/Resources/DelayedGoods/Schemas/DelayedGoodForm.php
index 25eedb5..7d676ce 100644
--- a/app/Filament/Resources/DelayedGoods/Schemas/DelayedGoodForm.php
+++ b/app/Filament/Resources/DelayedGoods/Schemas/DelayedGoodForm.php
@@ -2,7 +2,9 @@
 
 namespace App\Filament\Resources\DelayedGoods\Schemas;
 
+use App\Models\Unit;
 use App\Models\Warehouse;
+use App\Models\WarehouseStock;
 use Filament\Forms\Components\DatePicker;
 use Filament\Forms\Components\Select;
 use Filament\Forms\Components\Textarea;
@@ -79,6 +81,7 @@ public static function configure(Schema $schema): Schema
                         ->preload()
                         ->native(false)
                         ->required()
+                        ->live()
                         ->default(fn () => Warehouse::first()?->id),
 
                     Select::make('customer_id')
@@ -103,6 +106,29 @@ public static function configure(Schema $schema): Schema
                             $recalculateTotal($get, $set);
                             $recalculateRemaining($get, $set);
                         })
+                        ->rules([
+                            fn (callable $get, $record) => function (string $attribute, $value, $fail) use ($get, $record) {
+                                $warehouseId = $get('warehouse_id');
+                                $unitId = $get('unit_id');
+                                $quantity = (float) str_replace(',', '.', $value);
+
+                                if (! $warehouseId || ! $unitId || $quantity <= 0) {
+                                    return;
+                                }
+
+                                $available = WarehouseStock::getQuantity($warehouseId, $unitId);
+
+                                // If we are editing, we add back the current quantity
+                                if ($record && $record->warehouse_id == $warehouseId && $record->unit_id == $unitId) {
+                                    $available += (float) $record->quantity;
+                                }
+
+                                if ($available < $quantity) {
+                                    $unitAlias = Unit::find($unitId)?->alias ?? 'satuan';
+                                    $fail('Stok tidak mencukupi untuk unit ini di gudang tersebut. Tersedia: '.str_replace('.', ',', (float) $available)." {$unitAlias}");
+                                }
+                            },
+                        ])
                         ->currencyMask(thousandSeparator: '.', decimalSeparator: ',', precision: 2)
                         ->formatStateUsing(fn ($state) => $state === null ? null : (float) $state)
                         ->dehydrateStateUsing($unmaskQty),
@@ -127,7 +153,8 @@ public static function configure(Schema $schema): Schema
                         ->searchable()
                         ->preload()
                         ->native(false)
-                        ->required(),
+                        ->required()
+                        ->live(),
                 ]),
 
             Grid::make(3)
diff --git a/app/Filament/Resources/Manage/Orders/OrderResource.php b/app/Filament/Resources/Manage/Orders/OrderResource.php
index 2daa650..397cfc0 100644
--- a/app/Filament/Resources/Manage/Orders/OrderResource.php
+++ b/app/Filament/Resources/Manage/Orders/OrderResource.php
@@ -11,7 +11,9 @@
 use App\Filament\Columns\TimestampColumns;
 use App\Filament\Resources\Manage\Orders\Pages\ManageOrders;
 use App\Models\Order;
+use App\Models\Unit;
 use App\Models\Warehouse;
+use App\Models\WarehouseStock;
 use BackedEnum;
 use Filament\Actions\BulkActionGroup;
 use Filament\Forms\Components\DatePicker;
@@ -105,6 +107,7 @@ public static function form(Schema $schema): Schema
                             ->preload()
                             ->native(false)
                             ->required()
+                            ->live()
                             ->default(fn () => Warehouse::first()?->id),
 
                         Select::make('customer_id')
@@ -128,6 +131,29 @@ public static function form(Schema $schema): Schema
                             ->afterStateUpdated(function ($state, callable $get, callable $set) use ($recalculateTotal): void {
                                 $recalculateTotal($get, $set);
                             })
+                            ->rules([
+                                fn (callable $get, $record) => function (string $attribute, $value, $fail) use ($get, $record) {
+                                    $warehouseId = $get('warehouse_id');
+                                    $unitId = $get('unit_id');
+                                    $quantity = (float) str_replace(',', '.', $value);
+
+                                    if (! $warehouseId || ! $unitId || $quantity <= 0) {
+                                        return;
+                                    }
+
+                                    $available = WarehouseStock::getQuantity($warehouseId, $unitId);
+
+                                    // If we are editing, we add back the current quantity
+                                    if ($record && $record->warehouse_id == $warehouseId && $record->unit_id == $unitId) {
+                                        $available += (float) $record->egg_quantity;
+                                    }
+
+                                    if ($available < $quantity) {
+                                        $unitAlias = Unit::find($unitId)?->alias ?? 'satuan';
+                                        $fail('Stok tidak mencukupi untuk unit ini di gudang tersebut. Tersedia: '.str_replace('.', ',', (float) $available)." {$unitAlias}");
+                                    }
+                                },
+                            ])
                             ->currencyMask(thousandSeparator: '.', decimalSeparator: ',', precision: 2)
                             ->formatStateUsing(fn ($state) => $state === null ? null : (float) $state)
                             ->dehydrateStateUsing($unmaskQty),
@@ -151,7 +177,8 @@ public static function form(Schema $schema): Schema
                             ->searchable()
                             ->preload()
                             ->native(false)
-                            ->required(),
+                            ->required()
+                            ->live(),
                     ])
                     ->columnSpanFull(),
 
diff --git a/app/Models/WarehouseStock.php b/app/Models/WarehouseStock.php
index d320ee4..77bfc8a 100644
--- a/app/Models/WarehouseStock.php
+++ b/app/Models/WarehouseStock.php
@@ -40,4 +40,16 @@ public static function adjustStock(int $warehouseId, int $unitId, bool $isBroken
 
         $stock->increment('quantity', $quantity);
     }
+
+    public static function getQuantity(int $warehouseId, int $unitId): float
+    {
+        return (float) (self::where('warehouse_id', $warehouseId)
+            ->where('unit_id', $unitId)
+            ->first()?->quantity ?? 0);
+    }
+
+    public static function hasSufficientStock(int $warehouseId, int $unitId, float|int $neededQuantity): bool
+    {
+        return self::getQuantity($warehouseId, $unitId) >= $neededQuantity;
+    }
 }