// Shift columns and reorder them within their container.

@mixin grid-shift($shift: false) {
  @include grid-is-zero-error(grid-shift, $shift);
  @if $shift {
    $_shift-value: calc(#{unquote(grid-calc($shift))} + #{grid-settings(gutter)});
    #{grid-settings(default-float)}: $_shift-value;
  } @else {
    #{grid-settings(default-float)}: auto;
  }

  position: relative;
}