.chat-message-container{contain:layout style paint;will-change:auto}.chat-scroll-container{contain:strict;overflow-anchor:auto;scroll-behavior:auto}.chat-scroll-container.is-streaming{scroll-behavior:auto!important}.typing-indicator{contain:layout style;will-change:transform}.typing-indicator span{will-change:transform;transform:translateZ(0)}.message-content{contain:content;overflow-wrap:break-word;word-break:break-word}.message-list{contain:layout style;content-visibility:auto}@keyframes bounce-optimized{0%,80%,to{transform:translateY(0) translateZ(0)}40%{transform:translateY(-6px) translateZ(0)}}@media (prefers-reduced-motion:reduce){*,.chat-message-container,.typing-indicator span{animation:none!important;transition:none!important;will-change:auto!important}}.chat-avatar{contain:strict;content-visibility:auto}.file-preview{contain:layout style}.chat-card{contain:layout}