Email Field: outline missing

FAQ > Why does my email address input field look different than other text input fields?

Many thanks, no I see the outline.

But I can′t style it, because I am not able to find the style for class="wpcf7-form-control-wrap your-email"
https://www.olafbriese.de/kontakt/

You’d better contact the theme seller to ask for a fix since it would be difficult for you to fix it because the theme applies style rules for input fields in a lot of places in its style sheet.