*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:system-ui,sans-serif}.chat-spinner{width:18px;height:18px;border:2px solid #ddd;border-top-color:#555;border-radius:50%;animation:chat-spin .7s linear infinite;flex-shrink:0}@keyframes chat-spin{to{transform:rotate(1turn)}}