Cannot edit CSS Stylesheet in this plugin

I dont find this line of coding in the css
“body .wc_email_inquiry_button_container .wc_email_inquiry_email_button”
&

“body .wc_email_inquiry_button_container .wc_email_inquiry_button, body .wc_email_inquiry_button_container .wc_email_inquiry_popup_button, body .wc_email_inquiry_button_container .wc_email_inquiry_button_3rd ”