gridレイアウト

.container {
display:grid;
grid-template-columns: 1fr 2fr;
}
.head {
background-color: #832122;
grid-column:1 / 3;
grid-row:1 / 2;}
.side {
background-color: #ccc;
grid-column:1 / 2;
grid-row:2 / 3;
}
.main2 {
background-color: #4A3F69;
grid-column:1 / 3;
grid-row:3 / 4;
}