I recently added an affiliate link to my site, and the widget they provided is referencing my CSS text style sheet.
The problem is that the text on my site is white, and the search box in the affiliate box is white, so you don't see anything in the text box unless you highlight the text. I changed the font color on the affiliate widget on their site, but it still comes up white.
I did see a discussion where they suggested changing the font family, which may be a start. I'm wondering though how can I change the style for just this one reference and not my whole site without changing the code I was provided from the affiliate. Perhaps I need to add something to my style.css?
You might try inline CSS styles in your widget HTML code but without seeing your page, it's impossible to be more specific.