Wtih more and more people using dark mode on their PC's, tablets and phones, it would be great with better support for creating emails that support both dark mode and normal mode users. Features should include:

• Preview for both dark and normal mode, not just dark mode like today
• A styling guide in the documentation
• Tools in the editor to evaluate design elements for both modes while creating the mail
• Tools to evaluate items in the library for usability in both modes
• Extend the brand profile to create brand profiles that automatically support both modes (by including CSS?)