@charset "utf-8";
/* CSS Document */

body { background-color:#FFF; }

.item-a {
  grid-area: header;
}
.item-b {
  grid-area: main;
  place-self: center;
}
.item-c {
  grid-area: sidebar;
}
.item-d {
  grid-area: footer;
}

.container {
  display: grid;
  height: 100%;
  justify-content: center;
  grid-template-columns: auto 400px 400px auto;
  grid-template-rows: 2% auto auto;
  grid-template-areas: 
    "header header header header"
    ". main main sidebar"
    "footer footer footer footer";
}