My nav bar change a size!
the problem is when I am put the “position: fixed;” my nav bar change a size I can’t understand what is a problem where is conflict

This is because you are using flex-box layout which will try to minimize the width of the element. See this codepen

You must try setting a width in your flex-container(header).

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Hi Sockoro,

I agree with @ShubhamCanMakeCommit, you need to specify the width of your header.

add this at the top of your css:

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;

then just add the following to your div with the class .header

position: fixed;
width: 100%;

Let me know if that worked or have any questions

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