@media (max-width: 768px) {
  .fs-md-14 { font-size: 14px; }
  .fs-md-16 { font-size: 16px; }
  .fs-md-18 { font-size: 18px; }
}

@media (max-width: 576px) {
  .fs-sm-12 { font-size: 12px; }
  .fs-sm-14 { font-size: 14px; }
}