My friend runs congress.dev which displays diffs
This is really great. Reading the bill raw feels like reviewing a diff with context set to 0.
What I find most frustrating are the bills written as prose-diffs themselves: "In some entirely different piece of law, Foo shall be inserted after Bar, with an overall effect and purpose which will not be described here."
Yes. Many bills are modifying the US Code. So the bills are sort of like wordy patches.
This site's font is very pleasant to read. Poking around the raw html reveals webkit antialiasing and a Google font called Nunito Sans.