discourse-subscriptions/assets/stylesheets/common/layout.scss

.discourse-subscriptions-section-columns {
  display: flex;
  justify-content: space-between;

  margin: 20px;
  padding: 20px;

  @include breakpoint(medium) {
    flex-direction: column;
  }

  .section-column {
    min-width: calc(50% - 0.5em);
    max-width: 100%;

    &:last-child {
      margin-left: 0.5em;
    }

    &:first-child {
      margin-right: 0.5em;
    }

    @include breakpoint(medium) {
      min-width: 100%;

      &:last-child {
        order: 2;
      }

      &:first-child {
        order: 1;
      }
    }
  }
}

#product-list {
  padding: 40px 120px;
  .product {
    margin-bottom: 60px;
  }
}