.on-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms cubic-bezier(.22,.94,.3,1), transform 600ms cubic-bezier(.22,.94,.3,1);
  will-change: opacity, transform;
}

/* Directions */
.on-reveal[data-direction="left"] { transform: translateX(-24px); }
.on-reveal[data-direction="right"] { transform: translateX(24px); }
.on-reveal[data-direction="up"] { transform: translateY(20px); }
.on-reveal[data-direction="down"] { transform: translateY(-20px); }

.on-reveal.revealed {
  opacity: 1;
  transform: translateX(0) translateY(0);
}

/* Optional small delay control via data-delay (in ms) */
.on-reveal[data-delay] {
  transition-delay: calc(var(--onreveal-delay, 0ms));
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .on-reveal {
    transition: none;
    opacity: 1;
    transform: none;
  }
}