Styles, theming and widget examples

Hi, I’m a UX designer working with a dev team and I can’t seem to find a design system and interactive reference for all of the out of the box compontents ( font stack, buttons, sliders, modals, grid, etc). Unfortunately my coding skills are limited to basic front end HTML and css. I have seen the theming showcase and tempates in the gallery, but it’s not quite what I need to help the team out.

Is there a reference anywhere that will help me get started?