Kercode/tutti_gruppi

.row {
  max-width: $grid-width;
  margin: 0 auto;

  &:not(:last-child) {
      margin-bottom: $gutter-vertical;

      @include respond(tab-port) {
          margin-bottom: $gutter-vertical-small;
      }
  }
  
  @include respond(tab-port) {
      max-width: 50rem;
      padding: 0 3rem;
  }

  @include clearfix;

  [class^="col-"] {
      float: left;

      &:not(:last-child) {
          margin-right: $gutter-horizontal;

          @include respond(tab-port) {
              margin-right: 0;
              margin-bottom: $gutter-vertical-small;
          }
      }

      @include respond(tab-port) {
          width: 100% !important;
      }
  }

  .col-1-of-2 {
      width: calc((100% - #{$gutter-horizontal}) / 2);
      
  }

  .col-1-of-3 {
      width: calc((100% - 2 * #{$gutter-horizontal}) / 3);
  }

  .col-2-of-3 {
      width: calc(2 * ((100% - 2 * #{$gutter-horizontal}) / 3) + #{$gutter-horizontal});
  }

  .col-1-of-4 {
      width: calc((100% - 3 * #{$gutter-horizontal}) / 4);
  }

  .col-2-of-4 {
      width: calc(2 * ((100% - 3 * #{$gutter-horizontal}) / 4) + #{$gutter-horizontal});
  }

  .col-3-of-4 {
      width: calc(3 * ((100% - 3 * #{$gutter-horizontal}) / 4) + 2 * #{$gutter-horizontal});
  }

}