discourse/themes/horizon/scss/hiddenstuff.scss

@use "lib/viewport";

.sidebar__panel-switch-button,
.notifications-button-footer .reason .text,
.pinned-button .reason .text,
.more-topics__browse-more {
  display: none;
}

@include viewport.from(md) {
  .horizon-new-topic-button-enabled {
    .list-controls #create-topic {
      display: none;
    }
  }
}