I can not find where I have to write the code


In main.css:

Make a new CSS rule that selects all a elements nested inside <div class="nav">..</div>. Check out the example above.
Set the color to #5a5a5a. [some nav text to call back - Remember what color does]
Set the font-size to 11px
Set the font-weight to bold
Set the padding-top to 14px, and the padding-bottom to 14px
Set the padding-left to 10px, and the padding-right to 10px
Make the text uppercase

and thats my code

    <div class="nav">
      <div class="container">
          <li><a href="#">Airbnb logo</a></li>
          <li><a href="#">Browse</a></li>
          <li><a href="#">Sign Up</a></li>
          <li><a href="#">Log In</a></li>
          <li><a href="#">Help</a></li>


Please edit your post
-1 select the code you want to present
-2 then either press CTRL-k or click on the </>-button, otherwise the EDITOR interprete's the < tag's >


I've formatted your code for you this time @panssehmahmoud. Next time you can try out the advice @leonhard_wettengmx_n left for you.

I think that this thread will help you to see where you should be writing your CSS code:

Let us know if you have any problems with that.