Styling Dropbox Embeds to Match New Website Background on Squarespace

Hi everyone! I manage a website and we’re updating the background design to better reflect our brand. We currently use Dropbox shared links and embedded folders to share brochures and project files with clients. As we change the site background (possibly using gradients or images), we want to ensure that the Dropbox embeds remain visually consistent and responsive. Does anyone have experience with styling Dropbox embeds (via CSS or custom code) so they blend well with new backgrounds on platforms like Squarespace? Any suggestions or best practices would be greatly appreciated. Thanks in advance!