.Constrain
renders 1:1
supports dynamic, inline ratios
.Constrain--contain
contains image within block
.Constrain--5by4
renders 5:4
.Constrain--4by3
renders 4:3
.Constrain--3by2
renders 3:2
.Constrain--8by5 / Constrain--16by10
renders 16:10
.Constrain--16by9
renders 16:9
.Constrain--top
image gravitates towards top edge
.Constrain--bottom
image gravitates towards bottom edge
.Constrain--left
image gravitates towards left edge
.Constrain--right
image gravitates towards right edge
.Constrain--topLeft
image gravitates towards top left corner
.Constrain--topRight
image gravitates towards top right corner
.Constrain--bottomLeft
image gravitates towards bottom left corner
.Constrain--bottomRight
image gravitates towards bottom right corner