Multiple column layout with margins
full row text
first column
second column
third column
Multiple column layout with margins, uneven sizes
Margins leave visible gaps outside of borders
full row text
first column w=4
second column w=2
third column - fill remaining
Multiple column layout with gutters, uneven sizes
Gutters have no visible gaps outside of borders
full row text
first column w=4
second column w=2
third column - fill remaining