.chat-layout{height:clamp(360px,70vh,640px);min-height:0}.chat-pane,.conversation-list,.messages{min-height:0}.messages{overscroll-behavior:contain;scrollbar-gutter:stable}.message{flex-shrink:0}.message-form{grid-template-columns:auto auto minmax(0,1fr) auto}.chat-upload-note{grid-column:1/-1;font-size:12px;color:var(--muted);margin:0}.chat-image,.chat-video{display:block;max-width:100%;max-height:260px;border-radius:8px;object-fit:contain;background:#101817}.chat-attachment{display:grid;gap:8px;min-width:0}.chat-attachment a{color:inherit;overflow-wrap:anywhere}.chat-attachment small,.attachment-expired{font-size:12px;opacity:.75}
@media(max-width:920px){.chat-layout{height:clamp(400px,78vh,720px);grid-template-rows:minmax(65px,110px) minmax(0,1fr)}.conversation-list{overflow:auto}.message{max-width:92%}.message-form{gap:6px;padding:8px}.message-form .primary-btn{padding:8px;font-size:12px}}