.social-actions { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.social-actions--rail { position: absolute; right: max(var(--social-edge), env(safe-area-inset-right)); bottom: var(--social-bottom); z-index: 1; width: 44px; }
.social-actions__button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; min-width: 44px; min-height: 56px; padding: 2px 0; border: 0; background: transparent; color: inherit; font: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.social-actions .social-actions__button > svg { width: 30px; height: 30px; fill: none; stroke: currentColor; stroke-width: 1.9; transition: transform 120ms ease; }
.social-actions .social-actions__like[aria-pressed="true"] > svg { fill: #ef4262; stroke: #ef4262; }
.social-actions .social-actions__save[aria-pressed="true"] > svg { fill: currentColor; }
.social-actions__count { font-size: 12px; line-height: 16px; font-weight: 650; font-variant-numeric: tabular-nums; }
.social-actions__button:active > svg { transform: scale(.92); }
.social-actions__button:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; }
.social-actions__notice { margin: 0; padding: 12px; border-radius: 10px; font-size: 12px; line-height: 1.5; background: #efe2d1; color: #644c33; }
/* One subtle palette per format; every conversation owns its theme, so
   switching cards cannot recolor another open or cached panel. */
.comments-sheet {
  --comments-accent: #2f5847;
  --comments-surface: color-mix(in srgb, var(--comments-accent) 6%, white);
  --comments-ink: color-mix(in srgb, var(--comments-accent) 45%, #20252c);
  --comments-body: color-mix(in srgb, var(--comments-accent) 35%, #4b4f55);
  --comments-muted: color-mix(in srgb, var(--comments-accent) 25%, #697078);
  --comments-input: color-mix(in srgb, var(--comments-accent) 10%, white);
  --comments-soft: color-mix(in srgb, var(--comments-accent) 13%, white);
  --comments-border: color-mix(in srgb, var(--comments-accent) 21%, white);
  --comments-avatar: color-mix(in srgb, var(--comments-accent) 14%, white);
  --comments-avatar-alt: color-mix(in srgb, var(--comments-accent) 11%, white);
  --sheet-surface: var(--comments-surface);
  --sheet-ink: var(--comments-ink);
  --sheet-muted: var(--comments-muted);
  --sheet-border: var(--comments-border);
  --sheet-control: var(--comments-soft);
  --sheet-control-ink: var(--comments-accent);
  --sheet-handle: var(--comments-border);
  --sheet-focus: var(--comments-accent);
  --sheet-backdrop: color-mix(in srgb, color-mix(in srgb, var(--comments-accent) 35%, #111827) 40%, transparent);
}
.comments-sheet[data-format="format-3"] { --comments-accent: #ad4933; }
.comments-sheet[data-format="format-5"] { --comments-accent: #766181; }
.comments-sheet[data-format="format-7"] { --comments-accent: #3d596b; }
.comments-sheet[data-format="format-8"] { --comments-accent: #685285; }
.comments-sheet[data-format="format-9"] { --comments-accent: #2e6269; }
.comments-sheet[data-format="format-10"] { --comments-accent: #355782; }
.comments-sheet[data-format="format-11"] { --comments-accent: #8c4a54; }
.comments-sheet[data-format="format-12"] { --comments-accent: #7c552d; }

.comments-sheet__empty { margin: 30px 0; font-size: 13px; line-height: 1.5; text-align: center; color: var(--comments-muted); }

.comments-sheet__count { font-size: 12px; font-weight: 500; vertical-align: middle; margin-left: 4px; color: var(--comments-muted); }
.comments-sheet__list { padding: 18px 24px 6px; overflow-y: auto; overscroll-behavior: contain; flex: 1; min-height: 0; scrollbar-width: thin; }
.class-comment { display: flex; gap: 12px; margin: 0 0 24px; align-items: flex-start; }
.class-comment > div { min-width: 0; flex: 1; }
.comment-avatar { display: grid; place-items: center; flex: none; width: 35px; height: 35px; border-radius: 50%; background: var(--comments-avatar); color: var(--comments-accent); font-size: 10px; font-weight: 650; }
.class-comment:nth-child(3n) .comment-avatar { background: var(--comments-soft); color: var(--comments-accent); }
.class-comment:nth-child(3n + 1) .comment-avatar { background: var(--comments-avatar-alt); color: var(--comments-accent); }
.class-comment--teacher .comment-avatar { background: var(--comments-accent) !important; color: #fff !important; }
.class-comment h3 { margin: 1px 0 2px; display: inline; font-size: 12px; font-weight: 650; }
.class-comment__tag { display: block; font-size: 9px; color: var(--comments-muted); margin-top: 3px; }
.class-comment--teacher .class-comment__tag { color: var(--comments-accent); }
.class-comment p { margin: 8px 0 0; font-size: 13px; line-height: 1.6; color: var(--comments-body); white-space: pre-wrap; overflow-wrap: anywhere; }
.class-comment__meta { display: flex; align-items: center; flex-wrap: wrap; gap: 0 12px; margin-top: 4px; }
.class-comment__date { color: var(--comments-muted); font-size: 11px; line-height: 1.4; }
.class-comment__reply { display: inline-flex; align-items: center; min-height: 44px; padding: 4px 0; background: transparent; color: var(--comments-accent); font-size: 11px !important; font-weight: 600 !important; }
.class-comment__like { display: inline-flex; align-items: center; justify-content: center; gap: 5px; min-width: 44px; min-height: 44px; margin-left: auto; padding: 6px 0; background: transparent; color: var(--comments-muted); touch-action: manipulation; }
.class-comment__like svg { width: 19px; height: 19px; stroke-width: 1.7; }
.class-comment__like-count { font-size: 11px; line-height: 16px; font-variant-numeric: tabular-nums; }
.class-comment__like[aria-pressed="true"] { color: #be284a; }
.class-comment__like[aria-pressed="true"] svg { fill: currentColor; }
.class-comment__like:active svg { transform: scale(.9); }
.class-comment__replies { margin: 8px 0 0; padding-left: 13px; border-left: 1px solid var(--comments-border); }
.class-comment--reply { gap: 9px; margin: 0 0 16px; }
.class-comment--reply:last-child { margin-bottom: 0; }
.class-comment--reply .comment-avatar { width: 28px; height: 28px; font-size: 9px; }
.comments-sheet__reply-context { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; padding-left: 10px; border-left: 2px solid var(--comments-accent); }
.comments-sheet__reply-context > div { flex: 1; min-width: 0; }
.comments-sheet__reply-recipient { margin: 0; font-size: 11px; font-weight: 600; color: var(--comments-accent); }
.comments-sheet__reply-excerpt { margin: 5px 0 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; color: var(--comments-muted); }
.comments-sheet__reply-context button { display: grid; place-items: center; flex: none; width: 44px; height: 44px; padding: 10px; border-radius: 50%; background: transparent; color: var(--comments-accent); }
.comments-sheet__reply-context svg { width: 16px; height: 16px; }
.comments-sheet__form { padding: 14px 20px var(--content-bottom); border-top: 1px solid var(--comments-border); background: var(--comments-surface); flex: none; }
.comments-sheet__composer { display: flex; align-items: center; gap: 10px; }
.comment-avatar--you { background: var(--comments-soft) !important; color: var(--comments-accent) !important; }
.comments-sheet textarea { resize: none; min-width: 0; flex: 1; width: 100%; padding: 12px; border: 1px solid var(--comments-border); border-radius: 12px; font-family: inherit; font-size: 16px; line-height: 1.4; color: var(--comments-ink); background: var(--comments-input); outline-color: var(--comments-accent); height: 66px; }
.comments-sheet textarea::placeholder { color: var(--comments-muted); font-size: 12px; }
.comments-sheet__composer button { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: var(--comments-accent); color: #fff; }
.comments-sheet__composer button:disabled { background: var(--comments-soft); color: var(--comments-muted); cursor: default; }
.comments-sheet__composer button svg { width: 20px; height: 20px; }
.comments-sheet__note { font-size: 9px; color: var(--comments-muted); margin: 10px 0 0; text-align: center; line-height: 1.5; }

@media (max-width: 699px) {
  .social-actions__button { min-width: 44px; }
  .comments-sheet__list, .comments-sheet__form {
    padding-left: max(var(--edge), env(safe-area-inset-left));
    padding-right: max(var(--edge), env(safe-area-inset-right));
  }
  .class-comment { gap: 10px; }
  .class-comment__replies { padding-left: 10px; }
  .class-comment--reply { gap: 8px; }
  .comments-sheet__composer { gap: 8px; }
  .comments-sheet__composer button { flex: 0 0 44px; width: 44px; height: 44px; }
}

@media (prefers-reduced-motion: reduce) { .social-actions__button > svg { transition: none; } }

@media (max-height: 480px) {
  :root { --social-height: 148px; }
  .social-actions__button { min-height: 44px; gap: 2px; }
  .social-actions .social-actions__button > svg { width: 24px; height: 24px; }
  .social-actions__count { font-size: 11px; line-height: 14px; }
}

.comments-sheet[data-format="format-17"] { --comments-accent: #28676b; }