Ios Swift UI中如何为Text提供内部填充

struct MostViewedViewItem: View {
    let moviePic: String = "image_placeholder"
    let movieName: String = "Movie Name Loading..."
    
    var body: some View {
        Button {
            // TODO: add a navigation link to the movie
        } label: {
            ZStack(alignment: .bottom) {
                Image(moviePic)
                    .resizable()
                    .aspectRatio(contentMode: .fill)
                    .frame(width: 170, height: 100)
                    .clipShape(RoundedRectangle(cornerRadius: 3))
                    .overlay(
                        Text(movieName)
                            .scaledToFill()
                            .frame(height: 30)
                            .foregroundColor(.white)
                            .background (
                                Rectangle()
                                    .fill(Color("lighter_bg"))
                                    .opacity(0.4)
                            ),
                        alignment: .bottom
                    )
            }
        }
    }
}

我试图在背景中添加填充，所以我希望背景填充整个水平空间，但我希望文本有一些填充，如何做到这一点？