width.\n  width: 100%;\n  padding-right: $gutter * .5;\n  padding-left: $gutter * .5;\n}\n\n@mixin make-col($size, $columns: $grid-columns) {\n  flex: 0 0 percentage(divide($size, $columns));\n  // Add a `max-width` to ensure content within each column does not blow out\n  // the width of the column. Applies to IE10+ and Firefox. Chrome and Safari\n  // do not appear to require this.\n  max-width: percentage(divide($size, $columns));\n}\n\n@mixin make-col-auto() {\n  flex: 0 0 auto;\n  width: auto;\n...