ol {
	display: grid;
	grid-template-columns: 2fr 1fr; /* “Unnamed” tracks. */
	grid-template-rows: 6rem 60vh 6rem;
}

li:first-child {
	background-color: crimson;
	grid-column: 1 / span 2; /* When it starts / when it ends. */
}

li:nth-child(2) { background-color: hotpink; }

li:nth-child(3) {
	background-color: lightsalmon;
	grid-column: 2;
	grid-row: 2 / 4; /* Instead of span. */
}