App Interface Guideline: Safe Areas — Safe Area Insets. Keywords: safe area insets notch gesture. Platform: iOS/Android/React Native. Description: Content must not overlap notches/gesture bars. Do: Wrap screens in SafeAreaView or apply insets. Don't: Place tappable content under system bars. Good Example: <SafeAreaView style={{ flex: 1 }}><Screen /></SafeAreaView>. Bad Example: <View style={{ flex: 1 }}><Screen /></View>. Severity: High.