Grid Example
Full inner width (span 12)
6 / 12
6 / 12
4 / 12
4 / 12
4 / 12
3 / 12
3 / 12
3 / 12
3 / 12
8 / 12
4 / 12
4 / 12
8 / 12
9 / 12
3 / 12
3 / 12
9 / 12
7 / 12
5 / 12
5 / 12
7 / 12
2 / 12
10 / 12
10 / 12
2 / 12
Offset example — start at 3, span 8 (inner tracks 3–10)