.chat-workspace { max-width: 52rem; margin-inline: auto; }
.chat-room-nav { display: flex; flex-wrap: wrap; align-items: center; gap: .25rem 1rem; margin-bottom: .75rem; }
.chat-room-nav > span { margin-left: auto; }
.chat-invitation { padding: 1.5rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--surface-card); }
.chat-composer { padding-bottom: max(.5rem, env(safe-area-inset-bottom)); }
@media (max-width: 640px) {
  .chat-invitation { padding: 1rem; }
  .chat-workspace .site-page-header { margin-bottom: 1rem; }
}
/* Keep an expanded moderation sheet in normal document flow and uncovered.
   Closing the native details restores the resting sticky composer. */
.chat-workspace:has([data-chat-more][open]) .chat-composer { position: static; }