#conteneur4 > * {
    background-color:mediumslateblue;
    padding: 30px;
  }
#conteneur4 {

display: grid;
grid-template-columns: repeat(6,1fr);
grid-template-rows: repeat(4, minmax(75px, auto));
text-align: center;
gap:2px
}


#conteneur4 header {
grid-column-start: 1;
grid-column-end: 7;



}
#conteneur4 nav {
    grid-column-start: 1;
    grid-column-end: 7;
    grid-row-start: 2;

}
#conteneur4 footer {
    grid-row-start: 6;
   
    grid-column-start: 1;
    grid-column-end: 7;
   
}
#conteneur4 aside {
    grid-column-start: 1;
    

    grid-row-start: 3;
    grid-row-end: 5;

}
#conteneur4 main {
    grid-column-start: 2;
    grid-column-end: 7;
    

    grid-row-start: 3;
    grid-row-end: 5;
}