.bubble{max-width:80%;padding:12px 14px;border-radius:16px;font-size:14px;line-height:1.5}.user{align-self:flex-end;background:var(--user-bubble);color:#fff;border-bottom-right-radius:4px}.ai{align-self:flex-start;background:var(--ai-bubble);color:#333;border-bottom-left-radius:4px}.typing{display:flex;gap:6px}.dot{width:6px;height:6px;background:#777;border-radius:50%;animation:blink 1.4s infinite both}.dot:nth-child(2){animation-delay:.2s}.dot:nth-child(3){animation-delay:.4s}