title: position relative but fixed header
body: <p>I need to have following Header in relative position like here:
  <a href="https://i.stack.imgur.com/XC13t.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XC13t.png" alt="enter image description here"></a></p>
  
  <p>But I want to be the header fixed, when scrolling content, so i tried `position: fixed. </p>
  
  <p>Now the problem is that it looks like that:
  <a href="https://i.stack.imgur.com/2CIav.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2CIav.png" alt="enter image description here"></a></p>
  
  <p>Does somebody have an idea?</p>