This is right content. Using additional div inside box class element (article) we get inner padding

This is right content WITOUT inner padding - additional 'no-padding' class was added to 'box' class
usable to put some image or any content which should expand to whole box size (only box round corners and shaddow is visible)

Title 1

Sub-Title 1

Paragraph body 1

Title 2

Sub-Title 2

Paragraph body 2

Title 3

Sub-Title 3

Paragraph body 3

Title 4

Sub-Title 4

Paragraph body 4

Full width box

This is full width box