/* diffex.css — additional exercise styles (extend as needed) */
.diff-formula {
  background: var(--cbg);
  border: 1px solid var(--bdr);
  border-radius: 6px;
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.8;
  margin: 8px 0;
  color: var(--acc3);
}
.theory-section { font-size: 12px; line-height: 1.8; color: var(--mut); }
.theory-section p { margin-bottom: 8px; }
.theory-section strong { color: var(--acc); }