.residual {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
  line-height: 1.6;
  word-break: break-word;
}

.residual-leaf,
.residual-unary,
.residual-binary,
.residual-group {
  display: inline;
}

.residual-unary,
.residual-binary {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px;
}

.op-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 1px 4px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--surface);
}

.residual-bound {
  color: var(--text-muted);
  font-size: 11px;
}

.residual-error {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 6px;
  border: 1px solid var(--accent-violation);
  border-radius: 3px;
  color: var(--accent-violation);
}

.residual-error .op-label {
  color: var(--accent-violation);
  border-color: var(--accent-violation);
  background: transparent;
}

.residual-error-message {
  font-size: 12px;
}