Can I use a Html Theme in Ojs?

Hello! My name is Cícero, I am from Brazil. I’m editor in the Magazine “Cadernos Pronatec Goiás” and i need to do adaptations in the layout of the magazine. So, I made a HTML and CSS code wich is suitable for our magazine. How can i use this HTML code that I create in the Open Journal System??? Because i think the back end of the system is perfect. Thank you very much!

OJS uses Smarty 3 as a template engine. It’s somewhat between PHP and HTML. You can find guideline on theme creation here: PKP Theming Guide