.fieldset {
  border: var(--border-width-hair) solid var(--foreground-secondary);
  padding: 12px 16px 16px;
  margin: 0 0 16px;
  background: transparent;
}
.fieldset--subtle {
  border-color: var(--background-tertiary);
}
.fieldset__legend {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--foreground-primary);
  padding: 0 6px;
}
.fieldset[disabled] {
  opacity: 0.55;
}