This is a single-column layout

I can make these by spanning twelve columns with a single container

This is a two-column layout

I can make these by spanning six columns with two container

This is a two-column layout

I can make these by spanning six columns with two container

This is a three-column layout

I can make these by spanning four columns with three container

This is a three-column layout

I can make these by spanning four columns with three container

This is a three-column layout

I can make these by spanning four columns with three container