Special div shrinking

Question

How should I change CSS such way, that

• if width of screen > 1100px then left nav width is constantly 555px

Answer 1

Try using media queries:

 @media only screen and (max-width: 1100px) {
   /*your css code */
 }

 @media only screen and (min-width: 1100px) {
   /*your css code */
 }

Here's w3c schools link about media queries.

https://www.w3schools.com/css/css_rwd_mediaqueries.asp