/* Feynman chat */
.chat {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.chat .msg {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-lg);
  max-width: 85%;
}
.chat .msg.user {
  align-self: flex-end;
  background: var(--accent-soft);
}
.chat .msg.assistant {
  align-self: flex-start;
  background: var(--surface-2);
  border: 1px solid var(--border);
}
/* Paragraph margins at the edges would double the bubble's own padding. */
.chat .msg > :last-child,
.chat .msg > :last-child > :last-child {
  margin-bottom: 0;
}
.chat .msg .who + * > :first-child {
  margin-top: 0;
}
.chat .msg .who {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.25rem;
}