grid-template-columns: [A-start] 60px 60px [A-start] 60px;
grid-template-areas: "B A";
grid-auto-columns: 40px;
grid-gap: 1px;
grid-column-start:
-1
A
A -1
B -1
A -2
A -3
A -4
A -5
A
B
A 1
A 2
A 3
A 4
A 5
grid-column-end:
-1
A
A -1
B -1
A -2
A -3
A -4
A -5
A
B
A 1
A 2
A 3
A 4
A 5
grid-column: / span A-start 2
-1
A
-2
-3
-4
-5
A -1
B -1
A -2
A -3
A -4
A -5
A
span A
A 1
A 2
A 3
A 4
A 5