@mixin xmat-grid($cols) {

  $xmat-col-width: 100%/$cols;
  $xmat-all-cols: "";

  #{$xmat-row-class} {
    display: block;
    margin-left: -10px;
    margin-right: -10px;
    margin-bottom: 10px;
    box-sizing: border-box;
    &:before {
      display: table;
      content: " ";
    }
    &:after {
      display: table;
      content: " ";
      clear: both;
    }
    &.xmat-row-noMarginLeft {
      margin-left: 0;
    }
    &.xmat-row-noSideMargin {
      margin-left: 0;
      margin-right: 0;
    }
    &.xmat-row-noMarginBottom {
      margin-bottom: 0;
    }
    &.xmat-row-noMargin {
      margin-left: 0;
      margin-right: 0;
      margin-bottom: 0;
    }
  }

  @for $i from 1 through $cols {
    $cur-selector: #{$xmat-col-class}#{$i};
    $xmat-all-cols: $xmat-all-cols + $cur-selector + ", ";
    #{$cur-selector} {
      width: $i * $xmat-col-width;
    }

  }

  // $xmat-all-cols: str-slice($xmat-all-cols, 0, str-length($xmat-all-cols) - 2);
  // @debug "COLS SELECTOR = #{$xmat-all-cols}";

  #{$xmat-all-cols} {
    position: relative;
    min-height: 1px;
    padding-left: 10px;
    padding-right: 10px;
    float: left;
    margin: 0;
    box-sizing: border-box;
  }

  .xmat-col-noPadding {
    padding: 0;
  }

  .xmat-col-noPaddingLeft {
    padding-left: 0;
  }

  .xmat-col-noPaddingRight {
    padding-right: 0;
  }

}