The goal of this challenge was to make our own CSS file for the CSS Zen Garden Challenge (http://www.csszengarden.com). We were challenged to keeping to the Zen Garden rules of not altering the HTML and writing our own CSS without the use of bootstrap or other frameworks.
The end result is not that exciting in my opinion. It is very simple and I didn't actually change much of the original-CSS-less layout - just played around with colors, fonts and footers etc.
This was just challenging overall because it was one of the first times I had properly explored CSS design and felt like I was thrown in the deep end! I was overwhelmed with so much new syntax and hence just tried to get my head around that initially and hence didn't make massive strides in making the end-result something exciting!