#headerId {
  /* BG original  */
  /* background: #0082e6; */
  
  /* _todo_La couleur REd -> revele un decalage !!!!!! */
  /* background: red; */
  
  /* vertical-align: middle; */
  display: flex;
  align-items: center;
  
  height: 100px;
  width: 100%;
}