Don’t think widths, think proportions. A dead simple method of creating responsive fluid grids with fixed gutters. Use classes to set the proportions you want your columns to take at which breakpoint.
Supports nested grids and requires no class="first" or :first-child nonsense. Even works in IE7 and below
Check out the demo here: http://builtbyboon.com/posed/Proportional-Grids/
Read all about it: http://builtbyboon.com/blog/proportional-grids
built by Boon – given away free
If you have questions or put this to use then hit me up on Twitter (@mattberridge).
A shout must go out to Harry Roberts (@csswizardry) for pointing me in the right direction with the idea!