.bubble-user {
  background: rgba(99, 102, 241, 0.12);
  border-left: 3px solid #6366f1;
}
.bubble-assistant {
  background: rgba(30, 41, 59, 0.6);
  border-left: 3px solid #475569;
}
.tool-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: #c7d2fe;
  border-radius: 999px;
  font-family: ui-monospace, monospace;
}
.guard-warn {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fecaca;
  padding: 0.4rem 0.6rem;
  border-radius: 0.5rem;
  font-size: 0.8rem;
}