biobulkbende.org/app/assets/scss/modules/_rows.scss

.row {
  @include clearfix();

  &--large-only {
    display: none;

    @include atLarge {
      display: inline-block;
    }
  }

  &--gutters {
    margin-right: -60px;
    margin-bottom: 15px;
  }

  &--gutters > div {
    padding-right: 60px;
  }

  @include atLarge() {
    &__medium-3--larger {
      float: left;
      width: 30%;
    }

    &__medium-4 {
      float: left;
      width: 33.33%;
    }

    &__medium-6 {
      float: left;
      width: 50%;
    }

    &__medium-8 {
      float: right;
      width: 66.66%;
    }

    &__medium-9--smaller {
      float: right;
      width: 70%;
    }
  }

  /* Begin Equal Height Rules */
  .flexbox &--equal-height-at-medium {
    @include atMedium() {
      display: flex;
    }

    & > div {
      float: none;
      display: flex;
    }
  }

  .flexbox &--equal-height-at-large {
    @include atMedium() {
      display: flex;
    }

    & > div {
      float: none;
      display: flex;
    }
  }
}