Project Structure: Public Web Site + Angular

I was wondering if there is a way or advice on how to structure a startup project, it will consists of a Website (you know About, Contact, Home....) and behind the scenes the product which we're planning to use Angular.

Our main concern is about the structure of the project, we have bunch of HTML pages that will do the public website, SCSS and JS regarding the web.

We now want to start developing our SAAS project using Angular, but we don't know where to fit it, we want to keep the same SCSS styles, colors, variables and all of it, but Angular itself has its own styling rules. Can we share the styles from the website into Angular app?

Besides we want to keep all of that in the same git repository.

Hope I made myself clear.