Update app.py

app.py

@@ -349,10 +349,12 @@ div[data-testid="stNumberInput"] button {
 div[data-testid="stNumberInput"] button[aria-label="Increase value"]::before {
     content: "+";
     position: absolute;
+    color: var(--primary) !important;
 }
 div[data-testid="stNumberInput"] button[aria-label="Decrease value"]::before {
     content: "-";
     position: absolute;
+    color: var(--primary) !important;
 }
 
 /* حذف عناصر سیاه پس‌زمینه */