Containers and Sections
Containers dictate how wide content flows horizontally. It is responsive over many viewports.
Sections, on the other hand, allow for content flows vertically.
This has a small padding (space between the border and the background. And a small margin (space between the border and the next section below.
This has a medium padding (space between the border and the background. And a medium margin (space between the border and next section below.
This has a large padding (space between the border and the background. And a large margin (space between the border and the next section below.
This has the default padding (space between the border and the background. And no margin below.