How to build a theme similar to "Brikit Theme Press for Confluence"

Confluence Development
1

I need to build a theme for Confluence and it will be used for our intranet website. At Atlassian marketplace, I found that that

Brikit Theme Press for Confluence:
https://marketplace.atlassian.com/search?query=Brikit%20Theme%20Press

is close to what I need. By “close”, I mean its ability to customize, not its visual look and feel. I would like to learn/know how it was implemented.

I am a Java developer and new to Confluence/Jira. Where can I find a good tutorial explaining how to build a custom theme similar to “Brikit Theme Press for Confluence”? What I can find online such as the following is too simple:

Writing a Confluence Theme:
https://developer.atlassian.com/confdev/tutorials/writing-a-confluence-theme?_ga=1.265485647.1517411526.1490638576

Any pointer is really appreciated.

Thanks a lot!!!

2

What version of Confluence is your instance you’re trying to theme? Cloud or Server? (Easy way to tell is if your url has .atlassian.net it’s Cloud)

3

We are going to buy a license and install it on our own server.

Thanks for helping me!!