Reply To: How to show the hidden content by the sticky header?

[Senff]

Since your header has position fixed, the other elements on the page will not “see” it and act like it’s not there (called “taken out of the flow of the document”). So, you’ll have to create some space to position the rest of the page, as if the menu’s not there.

Give the .container a top padding of 175px and the header (the one that’s sticky) a top position of 0.