In Lecture 3, we looked at HTML and CSS. You can find the code we developed, along with the intermediate commits, in the fall-2018 branch of the bottle app. To get it, you can do:
If you start from scratch:
git clone https://luca_de_alfaro@bitbucket.org/luca_de_alfaro/bottle_intro.git
git checkout fall-2018
or if you have already checked out the code,
git fetch
git checkout fall-2018
git merge origin/fall-2018
The first command fetches the new code; the second makes sure you are in the fall-2018 branch; the third merges into your local copy of fall-2018 the changes that come from the server, thus bringing your local distribution up to date.
You may also want to look at the stupid.css documentation.