Tutorial - Single Layout Specs

@pserwylo Here are the style specs for an individual tutorial. The fonts align with what is currently used on the website. Though, I added an h4 and h5. I didn't see anything being used for these.

I've included a mockup showing how it would adapt to mobile. The tablet layout would fall somewhere in between depending on the size and break points. Let me know if you need additional design guidance there.

Side note, the website header is different in my mockups than what we currently have live. That's a separate issue though.