Where to find standards for implementing ‘Facebook’ style?

Context: I'm trying to improve my unofficial University Events website design. I'm a student programmer who is new to design.

Goal: Implement a mobile website design that has a similar look and feel as the Facebook mobile app for iOS/Android.

Design Features Desired:
-Most of the screen is taken up by the feed, consisting of a scrollable list of screen-width boxes.
-A menu of navigation options (in a small, horizontal row of icons, with an off-white background color.
-A small gray filler between posts.

Question: Are there any specific style guidelines released by Facebook? Ex. A description of their sizing for the nav bar, specific colors used for backgrounds, spacing of icons, etc.?

If not, how can I go about trying to re-engineer Facebook app design?