FIXED – 1px height block-header (related to bootstrap theme)

Hi,

I’m currently tuning a custom theme based on bootstrap.

My issue is that header zone is always at least 1px height, even if empty. You’ll see it here https://pit68.be/drpl/recherche just between banner at content.

  • I tackled it from css => no way
  • I tackled it from page.html.twig => no clue
  • I tackled it direct from DOM setting height at 0px => total failure… it stays at 1px

of course if there is something to display in header, it is not an issue but, if empty there is that 1px line.

Where does it come from ?

Thx beforehand
 

Drupal version: 


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