Cataloguer/assets/css/layout/_main.scss

.site-content {
  grid-area: page-container;
  margin-left: 1em;
  margin-right: 1em;
  @include mq("desktop") {
    margin: 2em;
  }

  &__header {
    & .section-nav {
      padding-block-end: 1em;

      & li {
        float: left;
        padding-inline: 1em;
      }
    }

    & .section__desc {
      border-block: 2px solid $dark;
      margin-block: 1em;
    }
  }
}