Hello, how can I set the theme to 'Slate', similar to what's used on web pages? <img width="1205" height="747" alt="Image" src="https://github.com/user-attachments/assets/c1b10fb7-1cfe-4904-ae15-ed4d816cdaf7" /> The PDF: <img width="790" height="513" alt="Image" src="https://github.com/user-attachments/assets/fc483113-0d6e-4deb-9602-a8327d924634" />
