The course included a lot on CSS from chaging the colour of text, like this, to changing the size of text, like this.
There was a lot of information on the different ways to change the size of text, and an explanation of how some ways are better than others. Below is a list of other things I learnt on the course related to CSS:
At the end of the course there was a bonus section on Bootstrap. I learnt how to style a webpage using Bootstrap, which included adding cards, like the ones below and on the home page.