/*centrer le menu*/
.container-header .mod-menu {
   justify-content: center;
   height: 70px;
   width: 99.4%;
   background:linear-gradient(#13d4f2, #eaeaea);
   font-family: arial black;
   }  

/*modifier padding entre titre et menu*/  
.container-header .grid-child {
  padding: 3px;
} 

/*Supprimer espace entre menu et corps*/ 
.container-banner {
  margin: 0 0 0;
}

.grid-child {
  display: contents;
}

/* position du footer*/
.grid-child {
  display: block;
}