/* Ondas laterales continuas — Lizette & Roberto */
main { position: relative; isolation: isolate; }
.lizberto-waves {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 5;
  overflow: hidden;
}
/* El contenido permanece por encima de las ondas. */
main > section { position: relative; }
main > section > :not(.lizberto-waves) { position: relative; z-index: 6; }
@media (max-width: 700px) {
  .lizberto-waves { opacity: .90; }
}