vuejs-webpack-starter/assets/css/base/_grid-flex.scss

// http://www.thesassway.com/intermediate/simple-grid-mixins


@mixin row() {
  display:flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: stretch;
  // &:after{
  //   content:"";
  //   clear:both;
  //   display: block;
  // }
}

.row{
  @include row;
}
.row-rl{
  @include row;
}

%col-reset {
    box-sizing: border-box;
}

@mixin col($col, $offset: 0, $sum: $default_sum, $gap: $default_gap, $align: top) {
  @extend %col-reset;
  padding-left: $gap*$offset;
  @if $col == $default_sum {
    // if last col, then no gap
    padding-right: 0;
  }@else{
    padding-right: $gap;
  }
  &:last-child{padding-right: 0;}

  // no offset with flex ??
  // margin-left: percentage(($col/$sum)*$offset);

  // col width
  flex-basis: percentage($col/$sum);
}

@for $c from 1 through $default_sum {
  .col-#{$c} {
      @include col($c);
  }

  // small
  .small-col-#{$c} {
    @media only screen and (max-width: $small-bp) {
      @include col($c);
    }
  }

  // medium
  .med-col-#{$c} {
    @media only screen and (min-width: $small-bp+1) and (max-width: $med-bp) {
      @include col($c);
    }
  }

  // large
  .large-col-#{$c} {
    @media only screen and (min-width: $med-bp+1) {
      @include col($c);
    }
  }

}

@for $c from 1 through $default_sum - 1 {
  @for $o from 1 through $default_sum - $c {
    .col-#{$c}-offset-#{$o} {
      @include col($c, $o);
    }
  }
}

// TODO: replace with align-self:flex-start or flex-end
// .col.float-right{
//   float: right;
//   padding-right: 0;
//   padding-left: $default_gap;
// }