This is a CSS tutorial , each branch contains a specific topic
1-master(css-intro)
2-css-box-model(box-model)
3-fonts
4-selecting elements
5- first-project(google home page) result : https://codepen.io/hssanbzlm/pen/KKddvGP
6-colors
7-units
8-flex (flex-box)
9-second-project (twitter home page) result: https://codepen.io/hssanbzlm/pen/YzyyryO
10- Animations (transform)
11- Third project (facebook home page)