grid-template-areas css
#page {
display: grid;
width: 100%;
height: 250px;
grid-template-areas: "head head"
"nav main"
"nav foot";
grid-template-rows: 50px 1fr 30px;
grid-template-columns: 150px 1fr;
}
#page > header {
grid-area: head;
background-color: #8ca0ff;
}
#page > nav {
grid-area: nav;
background-color: #ffa08c;
}
#page > main {
grid-area: main;
background-color: #ffff64;
}
#page > footer {
grid-area: foot;
background-color: #8cffa0;
}