scinote-web/app/assets/stylesheets/shared/action_toolbar.scss

.sn-action-toolbar {
  background: $color-concrete;
  z-index: 100;

  .btn.btn-light:hover {
    background: $color-white;
  }

  .icon-versions {
    display: inline-block;
    height: 14px;
    background-image: image-url("icon_small/versions-black.svg");
    background-position: center center;
    background-repeat: no-repeat;
    margin-bottom: -2px;
    width: 16px;
  }
}

@media (max-width: 1000px) {
  .sn-action-toolbar__button-text {
    display: none;
  }
}