Styling a Dialog Box in a cusotm visual

Hello everyone

I'm developing a custom visual where I have a custom dialog box, that I implemented by following the official tutorial:

https://docs.microsoft.com/en-us/power-bi/developer/visuals/create-display-dialog-box

The dialog woroks correctly, however I noticed an annoying problem: the visual's main stylesheet ("style/visual.less") seems to have absolutely no effect on the contents of the Dialog Box.

I was able to work around this by injecting a <style> tag as a string directly in the iframe's head, but it feels like a hacky solution... is there a proper way to provide a dedicated stylesheet for the Dialog Box?