Content is hidden by the top navbar

[GuillaumeGomez]

For instance, when scrolling through the page, when pressing 'S' to go back to the search bar, we only partially see it because it's hidden under the top navbar. We should add a top margin to the container to avoid this situation.

[GuillaumeGomez]

Seems like it's working on chrome. I'll check again on firefox, maybe it's just a not updated CSS in the end...