Responsive Design

1 ) CSS Units – vh/vw, %

CSS properties take “length” values, such as width, margin, padding, font-size, etc.

2 ) New Box Modal

https://elad.medium.com/new-css-logical-properties-bc6945311ce7

3) The Viewport

4 ) Positioning

How to make a div 100% of height browser window?

https://stackoverflow.com/questions/1575141/how-to-make-a-div-100-height-of-the-browser-window