Where and how do i change the look of the Gui Shop?

For example;

• How to change the position of buttons?
• How to change the background of the GUI Shop?
• How to change fonts and text colors?

Any info helps casue im pretty new to this and im not even sure what coding language i should learn to be able to understand the plugin files FML.

Thank you in advanced!!!

All plugins are written in C# on uMod/Oxide.
Inside the plugin look for the CUI region and all the info should be there.
I'd normally have more information, but I am currently backed up with other work. Apologies.