.discussion-page { min-height: 100vh; }

.discussion-nav {
  position: sticky;
  z-index: 10;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 58px;
  padding: 7px max(16px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(16px);
}

.back-link {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 2px;
  min-height: 42px;
  padding: 0 8px 0 2px;
  color: var(--muted);
  font-size: .86rem;
  text-decoration: none;
}
.back-link:hover { color: var(--accent); }
.back-link svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.discussion-brand { color: var(--ink); font-size: 1.05rem; font-weight: 780; text-decoration: none; }
.discussion-nav .icon-button { justify-self: end; width: 42px; height: 42px; }
.discussion-share-button { display: none; }

.discussion-main {
  width: min(100%, 880px);
  min-height: auto;
  margin: 0 auto;
  padding: 28px 22px 64px;
}

.discussion-story {
  padding: 22px 24px;
  border-radius: 12px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.discussion-story h1 { margin: 0; font-size: clamp(1.25rem, 3vw, 1.75rem); line-height: 1.42; }
.story-original-title { margin: 8px 0 0; color: var(--faint); font-size: .8rem; line-height: 1.45; }
.discussion-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 13px; color: var(--faint); font-size: .75rem; }
.discussion-meta a { color: var(--muted); text-decoration: none; }
.discussion-meta a:hover { color: var(--accent); }
.discussion-summary { margin: 16px 0 0; color: var(--muted); font-size: .92rem; line-height: 1.65; }
.story-text { margin-top: 15px; }
.story-text summary, .original-text summary { color: var(--faint); font-size: .73rem; cursor: pointer; }
.story-text p, .original-text p { margin: 7px 0 0; color: var(--faint); font-size: .78rem; line-height: 1.58; white-space: pre-wrap; overflow-wrap: anywhere; }

.discussion-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin: 29px 3px 12px; }
.discussion-heading h2 { margin: 0; font-size: 1rem; }
.translation-status { color: var(--faint); font-size: .72rem; text-align: right; }
.translation-status.loading::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 50%; background: var(--accent); animation: status-pulse 900ms ease-in-out infinite alternate; }
.translation-status.error { color: var(--orange); }
@keyframes status-pulse { to { opacity: .3; transform: scale(.75); } }

.comment-list { display: grid; gap: 9px; }
.comment-card {
  margin-left: min(calc(var(--depth) * 23px), 138px);
  padding: 13px 15px 14px;
  border-left: 2px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  border-radius: 0 9px 9px 0;
  background: var(--card);
  box-shadow: var(--shadow);
  /* Long threads: let the engine skip layout/paint of offscreen comments. */
  content-visibility: auto;
  contain-intrinsic-size: auto 132px;
  animation: comment-in 260ms ease both;
  animation-delay: min(calc(var(--i, 0) * 18ms), 180ms);
}
@keyframes comment-in { from { opacity: 0; transform: translateY(5px); } }
.comment-meta { display: flex; align-items: center; gap: 8px; color: var(--faint); font-size: .7rem; }
.comment-author { color: var(--ink); font-weight: 700; }
.comment-permalink { color: inherit; text-decoration: none; }
.comment-permalink:hover { color: var(--accent); }
.comment-translation, .comment-source { margin: 7px 0 0; font-size: .86rem; line-height: 1.65; white-space: pre-wrap; overflow-wrap: anywhere; }
.comment-source { color: var(--muted); }
.translation-placeholder { margin: 8px 0 0; color: var(--faint); font-size: .72rem; }
.original-text { margin-top: 7px; }

.empty-comments, .discussion-error { padding: 34px 20px; border-radius: 10px; background: var(--card); color: var(--muted); text-align: center; box-shadow: var(--shadow); }
.discussion-error h1 { margin: 0 0 7px; color: var(--ink); font-size: 1.2rem; }
.discussion-error p { margin: 0; }

.skeleton-panel .skeleton-line { margin-top: 12px; }
.skeleton-panel .skeleton-line:first-child { margin-top: 0; }
.skeleton-heading { width: 68%; height: 22px; }
.discussion-story.skeleton-panel { min-height: 138px; }
.comment-card.skeleton-panel { min-height: 105px; }

@media (max-width: 640px) {
  .discussion-theme-button { display: none; }
  .discussion-share-button { display: grid; }
  .discussion-main { padding: 16px 11px 48px; }
  .discussion-story { padding: 17px 15px; border-radius: 10px; }
  .discussion-story h1 { font-size: 1.12rem; }
  .discussion-summary { font-size: .84rem; }
  .discussion-heading { margin-top: 23px; }
  .comment-list { gap: 7px; }
  .comment-card { margin-left: min(calc(var(--depth) * 9px), 45px); padding: 11px 11px 12px; }
  .comment-translation, .comment-source { font-size: .8rem; line-height: 1.62; }
}

@media (prefers-reduced-motion: reduce) {
  .translation-status.loading::before { animation: none; }
}