Border style

Hello,
Since I like the Food and Menu plugin I decided to get this one too, but can’t get it to work properly. I’ll separate my issues in two topics.

First: I’d like to have a border-style:none, while this lines keep showing up. I tried adding:
.rtb-booking-form {border-style:none;}

to my style.css but nothing happened.
Tried to remove anything I could find in the docs css of the plugin but nothing.
In general terms it looks nothing like the screenshots, although I’m sure is not for the author fault.
Any help in tweaking it?

Website: http://www.marionio.com.au

Thanks a lot!

https://ww.wp.xz.cn/plugins/restaurant-reservations/