I want to customize the look of courses page

Hello,
I liked the look of courses pages on demo website
http://coursepress.org/demo/courses/
http://coursepress.org/demo/courses/demo-course/units/1-sed-egestas-erat-nec-purus/page/1/
How can I customize my theme for this look. Let me know the files where I need to make the changes for css.
I tried to follow this thread, but could not implement it successfully.
https://premium.wpmudev.org/forums/topic/how-to-design-the-coursepress-pro-on-my-theme-look-like-the-coursepress-theme
Please help
Thanks