Safari 26 Styling Updates

Update the background color in the safe areas to and bottom. Notice that they show as white on iOS 26 with Safari 26.

<img width="449" height="972" alt="Image" src="https://github.com/user-attachments/assets/1e41414e-68a2-4cce-a66c-0818590ba249" />

<img width="448" height="972" alt="Image" src="https://github.com/user-attachments/assets/ee6d8421-440e-4fc2-a67e-af729eb5fccc" />