Grid with offsets

Resize your browser window to test.

[no]

.o1

.o2

.o3

.o4

.o5

.o6

.o7

.o8

.o9

.o10

.o11

Detail of html code

.grid
  .grid
    .m1
  .grid
    .m1.o1
  .grid
    .m1.o2
  .grid
    .m1.o3
  .grid
    .m1.o4
  .grid
    .m1.o5
  .grid
    .m1.o6
  .grid
    .m1.o7
  .grid
    .m1.o8
  .grid
    .m1.o9
  .grid
    .m1.o10
  .grid
    .m1.o11