#sb-chat-btn { position: fixed; right: 16px; bottom: 16px; z-index: 999999; border: 0; border-radius: 999px; padding: 12px 14px; background: #111; color: #fff; font: 14px/1.2 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; cursor: pointer; }
#sb-chat-panel { position: fixed; right: 16px; bottom: 64px; width: 360px; max-width: calc(100vw - 32px); height: 520px; max-height: calc(100vh - 96px); z-index: 999999; background: #fff; border: 1px solid #ddd; border-radius: 12px; box-shadow: 0 8px 30px rgba(0,0,0,0.15); display: none; overflow: hidden; }
#sb-chat-header { padding: 10px 12px; border-bottom: 1px solid #eee; font: 14px/1.2 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; display: flex; justify-content: space-between; align-items: center; }
#sb-chat-body { padding: 12px; height: calc(100% - 104px); overflow: auto; font: 14px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; }
.sb-msg { margin: 0 0 10px; padding: 10px; border-radius: 10px; }
.sb-user { background: #f3f3f3; }
.sb-assistant { background: #fafafa; border: 1px solid #eee; }
#sb-chat-input { display: flex; gap: 8px; padding: 10px 12px; border-top: 1px solid #eee; }
#sb-chat-text { flex: 1; padding: 10px; border: 1px solid #ddd; border-radius: 10px; font: 14px/1.2 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; }
#sb-chat-send { padding: 10px 12px; border: 0; border-radius: 10px; background: #111; color: #fff; cursor: pointer; }