A question about the shortcode “[woocommerce_photo_reviews_form]”

Hi there:) I used your Photo Reviews plugin. When I use the shortcode “[woocommerce_photo_reviews_form]”, I see all reviews stars are turned into boxes. Please see the attached picture. When I tried to change the CSS code, I couldn’t turn these boxes into stars.

I would like to know:
1. How can I change the frame to stars?
2. How can I change the width of this review form?
PS: I use your Photo Reviews plug-in and Elementor together.

Thank you!