.forum-surface {
  color: var(--learning-ink);
}

.forum-breadcrumbs,
.forum-topic-meta,
.forum-topic-footer,
.forum-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.forum-breadcrumbs {
  margin: 0 0 24px;
  color: var(--learning-muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.forum-breadcrumbs a,
.forum-actions a,
.forum-replies {
  color: var(--course-accent-dark);
  font-weight: 800;
  text-decoration: none;
}

.forum-heading,
.forum-thread-head,
.forum-topic-row,
.forum-reply,
.forum-compose,
.forum-empty {
  border: 1px solid var(--learning-line);
  border-radius: 18px;
  background: var(--learning-paper);
}

.forum-heading,
.forum-thread-head {
  margin-bottom: 18px;
  padding: 24px;
}

.forum-heading h1,
.forum-thread-head h1,
.forum-compose h2,
.forum-reply-heading h2 {
  margin: 0;
  color: var(--learning-ink);
}

.forum-heading p,
.forum-topic-row p,
.forum-message,
.forum-empty p {
  color: var(--learning-muted);
  line-height: 1.55;
}

.forum-kicker {
  margin: 0 0 6px;
  color: var(--course-accent-dark);
  font-size: 0.78rem;
  font-weight: 850;
  text-transform: uppercase;
}

.forum-layout,
.forum-thread-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 18px;
  align-items: start;
}

.forum-topic-list,
.forum-reply-list {
  display: grid;
  gap: 14px;
}

.forum-topic-row,
.forum-reply,
.forum-compose,
.forum-empty {
  padding: 18px;
}

.forum-topic-row h2 {
  margin: 12px 0 8px;
  font-size: 1.12rem;
}

.forum-topic-row h2 a {
  color: var(--learning-ink);
  text-decoration: none;
}

.forum-topic-date {
  margin-left: auto;
  color: var(--learning-muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.forum-closed {
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--learning-soft);
  color: var(--learning-muted);
}

.forum-author {
  min-width: 0;
  display: inline-grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
}

.forum-author__avatar {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  overflow: hidden;
  border-radius: 12px;
  background: var(--learning-soft);
}

.forum-author__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.forum-author__body {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.forum-author__body strong,
.forum-author__body small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.forum-author__body strong {
  color: var(--learning-ink);
  font-size: 0.9rem;
}

.forum-author__body small {
  color: var(--course-accent-dark);
  font-size: 0.72rem;
  font-weight: 800;
}

.forum-message {
  margin-top: 14px;
}

.forum-message p {
  margin: 0 0 10px;
}

.forum-actions {
  margin-top: 12px;
}

.forum-actions form {
  margin: 0;
}

.forum-actions button {
  border: 0;
  background: transparent;
  color: var(--course-accent-dark);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.forum-compose {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 12px;
}

.forum-compose form {
  display: grid;
  gap: 10px;
}

.forum-compose label {
  color: var(--learning-muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.forum-compose input,
.forum-compose textarea {
  width: 100%;
  border: 1px solid var(--learning-line);
  border-radius: 12px;
  background: var(--learning-soft);
  color: var(--learning-ink);
  font: inherit;
}

.forum-compose input {
  min-height: 42px;
  padding: 9px 12px;
}

.forum-compose textarea {
  min-height: 140px;
  padding: 11px 12px;
  resize: vertical;
}

.lesson-forum {
  margin-top: 28px;
  padding: 24px;
  border: 1px solid var(--learning-line);
  border-radius: 18px;
  background: var(--learning-paper);
}

.lesson-forum__heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.lesson-forum__heading h2,
.lesson-forum__compose h3,
.lesson-forum__layout .forum-topic-row h3 {
  margin: 0;
  color: var(--learning-ink);
}

.lesson-forum__heading > div > p:last-child {
  margin: 6px 0 0;
  color: var(--learning-muted);
}

.lesson-forum__layout .forum-topic-row h3 {
  margin: 12px 0 8px;
  font-size: 1.08rem;
}

.lesson-forum__layout .forum-topic-row h3 a {
  color: inherit;
  text-decoration: none;
}

.lesson-forum__compose {
  position: static;
}

@media (max-width: 860px) {
  .forum-layout,
  .forum-thread-layout {
    grid-template-columns: 1fr;
  }

  .forum-compose {
    position: static;
  }

  .forum-topic-date {
    width: 100%;
    margin-left: 0;
  }

  .lesson-forum {
    padding: 18px;
  }

  .lesson-forum__heading {
    display: grid;
  }
}