open-vault/ui/app/styles/core/level.scss

.level:not(:last-child) {
  @include vault-block;
}

.level.has-padded-items {
  .level-item {
    flex: 0 1 auto;
  }
  .level-item {
    padding-right: 1.5rem;
  }
  .level-item.is-fixed-25 {
    flex-basis: 25%;
  }
}