convert to scss

scss/mixins/_grid.scss

@@ -0,0 +1,41 @@
+/// Grid system
+//
+// Generate semantic grid columns with these mixins.
+
+@mixin make-container($gutter: $grid-gutter-width) {
+  margin-right: auto;
+  margin-left: auto;
+  padding-left:  ($gutter / 2);
+  padding-right: ($gutter / 2);
+  @include clearfix();
+}
+
+@mixin make-row($gutter: $grid-gutter-width) {
+  margin-left:  ($gutter / -2);
+  margin-right: ($gutter / -2);
+  @include clearfix();
+}
+
+@mixin make-col($gutter: $grid-gutter-width) {
+  position: relative;
+  float: left;
+  min-height: 1px;
+  padding-left:  ($gutter / 2);
+  padding-right: ($gutter / 2);
+}
+
+@mixin make-col-span($columns) {
+  width: percentage(($columns / $grid-columns));
+}
+
+@mixin make-col-offset($columns) {
+  margin-left: percentage(($columns / $grid-columns));
+}
+
+@mixin make-col-push($columns) {
+  left: percentage(($columns / $grid-columns));
+}
+
+@mixin make-col-pull($columns) {
+  right: percentage(($columns / $grid-columns));
+}