.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--surface-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .03em;
  color: var(--text);
  flex-shrink: 0;
}