diff --git a/src/main/java/de/assecutor/votianlt/pages/view/AddJobView.java b/src/main/java/de/assecutor/votianlt/pages/view/AddJobView.java
index 714d010..0fcfea5 100644
--- a/src/main/java/de/assecutor/votianlt/pages/view/AddJobView.java
+++ b/src/main/java/de/assecutor/votianlt/pages/view/AddJobView.java
@@ -1273,16 +1273,6 @@ public class AddJobView extends Main {
             qty.setMax(9999); // Set reasonable maximum
             qty.setWidth("10%");
             qty.setRequiredIndicatorVisible(true);
-            // Add validation on blur
-            qty.addBlurListener(e -> {
-                if (qty.getValue() == null || qty.getValue() <= 0) {
-                    qty.setInvalid(true);
-                    qty.setErrorMessage("Anzahl muss größer als 0 sein");
-                } else {
-                    qty.setInvalid(false);
-                    qty.setErrorMessage("");
-                }
-            });
 
             NumberField weight = new NumberField("Gewicht");
             weight.setSuffixComponent(new Span("kg"));
@@ -1343,9 +1333,13 @@ public class AddJobView extends Main {
                     boolean isInvalid = intField.getValue() == null || intField.getValue() <= 0;
                     intField.setInvalid(isInvalid);
                     if (isInvalid) {
-                        intField.setErrorMessage("Anzahl muss größer als 0 sein");
+                        intField.setErrorMessage("");
+                        intField.getStyle().set("--vaadin-input-field-background", "rgba(255, 0, 0, 0.1)");
+                        intField.getStyle().set("--vaadin-input-field-border-color", "rgba(255, 0, 0, 0.3)");
                     } else {
                         intField.setErrorMessage("");
+                        intField.getStyle().remove("--vaadin-input-field-background");
+                        intField.getStyle().remove("--vaadin-input-field-border-color");
                     }
                 }
             };
@@ -1389,6 +1383,7 @@ public class AddJobView extends Main {
 
             // Initial validation
             validateField.accept(desc);
+            validateField.accept(qty);
             validateField.accept(weight);
             validateField.accept(len);
             validateField.accept(wid);