I'm making a website for a friend using twenty twelve theme.
I'd like to make a homepage using html and css.
I'm trying to design a homepage respecting the proportion of the theme.
So I'd like to use a grid system to make a nice design but I can't find a good one.
I wonder what are the ratios used to make the design of twenty twelve.
for example for a width of 1040px
the primary block has a 624 px width
the secondary block has a 250 px width
the nargin has a 86 px width
Could anyone help me to make a 12 or 16 columns grid system suitable with twentytwele?