header,nav,main,footer {
  border: black 2px solid;
  background-color:red;
}
header{
  grid-row:1/2;
  grid-column:1/3;
}
nav{
  grid-row:2/3 ;
  grid-column:1/2 ;
  height:max-content;
}
main{
  grid-row: 2/3;
  grid-column:2/3 ;
  height: max-content;
}
footer{
  grid-row:3/ 4;
  grid-column:1/3 ;
}
.box-two{
  max-width:1,000px;
  margin: 50px auto;
  display:grid;
  grid-gap: 10px;
  grid-template-columns: 250px minmax(0,1fr);
}