drupal-erable/web/themes/erabletheme/scss/_actualites.scss

.fullpage.actus {
  @media (min-width: $breakpoint_tablet) {
    .actus_list {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
  }
  @media (min-width: $breakpoint_desktop) {
    .actus_list {
        grid-template-columns: repeat(3, 1fr);
    }
  }
}

.fullpage {
  .actus_list {
    h2 {
      @media screen and (min-width: $breakpoint_tablet) {
        font-size: $xl_font_size !important;
      }
    }
  }
}