/* The standalone change-history page (reachable from the lesson's history tool). */
.lesson-history__page-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-block: 0.75rem 1.5rem;
}

/* A single revision's heading (Версия N + section badge) inside the diff view. */
.lesson-history__title {
  font-size: 1rem;
  font-weight: 600;
  margin-block: 0 var(--block-space);
}

.lesson-history__count {
  color: var(--color-subtle-dark);
  font-size: 0.85rem;
  margin-block: 0 var(--block-space);
}

.lesson-history__empty {
  color: var(--color-subtle-dark);
  margin-block: var(--block-space-half) 0;
}

/* Community-added sources credited above the revision log. */
.lesson-history__sources {
  margin-block-end: 1.75rem;
}

.lesson-history__sources-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-subtle-dark);
  margin-block: 0 0.6rem;
}

.lesson-history__sources-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.lesson-history__source-title {
  font-size: 0.92rem;
}

.lesson-history__source-by {
  color: var(--color-subtle-dark);
  font-size: 0.82rem;
  margin-inline-start: 0.4rem;
}

.lesson-history__list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  list-style: none;
  margin-block: 0;
  padding-inline-start: 0;
}

/* Day heading separating grouped revisions (Сегодня / Вчера / date). */
.lesson-history__date {
  color: var(--color-subtle-dark);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-block: var(--block-space) 0.15rem;
  padding-inline: 0.75rem;
  text-transform: uppercase;
}

.lesson-history__date:first-child {
  margin-block-start: 0;
}

.lesson-history__link {
  border-radius: 0.5em;
  color: var(--color-ink);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.6rem 0.75rem;
  text-decoration: none;
  transition: background-color 200ms ease;

  @media (any-hover: hover) {
    &:hover {
      background-color: var(--color-subtle-light);
    }
  }
}

.lesson-history__head {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--block-space-half);
}

.lesson-history__version {
  font-weight: 600;
}

.lesson-history__source {
  color: var(--color-subtle-dark);
  font-size: 0.8rem;
}

.lesson-history__byline {
  color: var(--color-subtle-dark);
  font-size: 0.8rem;
  margin-block: 0;
}

.lesson-history__reason {
  color: var(--color-ink);
  font-size: 0.9rem;
  margin-block: 0;
}

.lesson-history__more,
.lesson-history__back {
  color: var(--color-link);
  display: inline-block;
  font-size: 0.85rem;
  margin-block-start: var(--block-space);
  text-decoration: underline;
}

/* "Показать ещё" is a submit button now — strip the native button chrome so it reads as the same quiet text link it replaced. */
.lesson-history__more {
  background: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  padding: 0;
}

.lesson-history__back {
  margin-block: 0 var(--block-space);
}

/* Inline word diff — a hair of side padding + margin so a replaced word never mashes into its replacement ("словоСлово"). */
.revision-diff ins,
.revision-diff del {
  border-radius: 0.25em;
  margin-inline: 0.04em;
  padding-inline: 0.18em;
}

.revision-diff ins {
  background-color: oklch(var(--lch-green) / 0.2);
  color: var(--color-ink);
  text-decoration: none;
}

.revision-diff del {
  background-color: oklch(var(--lch-red) / 0.2);
  color: var(--color-ink);
  text-decoration: line-through;
}

/* ── Moderation comparison: segmented control + side-by-side panes ── */

.review-compare {
  margin-block-end: 1.5rem;
}

.segmented {
  background-color: var(--color-subtle-light);
  border: 1px solid var(--color-subtle);
  border-radius: 0.6rem;
  display: inline-flex;
  gap: 0.15rem;
  margin-block-end: var(--block-space);
  padding: 0.2rem;
}

.segmented__tab {
  background: none;
  border: 0;
  border-radius: 0.45rem;
  color: var(--color-subtle-dark);
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
  padding: 0.3rem 0.9rem;
}

.segmented__tab.is-active {
  background-color: var(--color-subtle);
  color: var(--color-ink);
}

.review-split {
  display: grid;
  gap: var(--block-space);
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 56rem) {
  .review-split {
    grid-template-columns: 1fr;
  }
}

.review-pane {
  border: 1px solid var(--color-subtle);
  border-radius: 0.6rem;
  overflow: hidden;
}

.review-pane__head {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin: 0;
  padding: var(--block-space-half) 0.9rem;
  text-transform: uppercase;
}

.review-pane__head--current {
  background-color: oklch(var(--lch-red) / 0.1);
  color: oklch(var(--lch-red));
}

.review-pane__head--proposed {
  background-color: oklch(var(--lch-green) / 0.1);
  color: oklch(var(--lch-green));
}

.review-pane__body {
  max-block-size: 34rem;
  overflow-y: auto;
  padding: 0.9rem 1.1rem;
}

/* The diff keeps RevisionDiff's newlines (block structure) visible. */
.review-diff .review-pane__body {
  border: 1px solid var(--color-subtle);
  border-radius: 0.6rem;
  white-space: pre-wrap;
}

.revision-stale {
  background-color: var(--color-subtle-light);
  border: 1px solid var(--color-subtle-dark);
  border-radius: 0.5em;
  color: var(--color-ink);
  font-size: 0.9rem;
  margin-block-end: 1.5rem;
  padding: 0.75rem 1rem;
}

.admin-edit-reason {
  font-size: 0.9rem;
  margin-block-end: var(--block-space);
}

.admin-diff {
  margin-block-end: 1.5rem;
}