I am very new to web design - I appreciate the feedback! I changed it to a serif font (Merriweather) and increased the margins for the browser version. Is this more readable?
Specifically I'd suggest:
* Change "margin" on the <p> tags to "1.5rem 0"
* Change "margin" on .blog-page to "1.5rem auto" to keep the grey background centered based on width
* Add "max-width: 800px" (or whatever) to .blog-page