Move layout Less to smaller files
Align the secondary navigation first menu item with the logo and content
Move the default theme layout code to theme-layouts.less
Move the default layout media queries styles so they're together with the other styles
Better 2-col, sidebar left layout.
Change CSS header for the one column layout
Don't calculate the three column sidebar width
Add a variable for the gutter between the columns in the three columns layout
Three column layouts: Set base styles for all of them
Better I--I layout by setting an equal gutter between the columns
Better --II layout by setting an equal gutter between the columns
Better II-- layout by setting an equal gutter between the columns
Move the centered three column layout styles to the bottom
Fix calculation on negative three column margin
Add a class to the wrapper and use it in the CSS
Better responsive theme layouts

< 1080px: All three column layouts turn into two columns with the
sidebars under each other
< 768px: Full width content area and two-column sidebars under the
content
< 620px: Full width sidebars under each other