/*
 * Phase 9D foundation: animations + easings
 * GSAP-ready scaffolding; modules opt in via class names.
 */

:root {
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.0, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-snap: cubic-bezier(0.6, 0, 0.4, 1);
  --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  --dur-fast: 150ms;
  --dur-base: 300ms;
  --dur-slow: 600ms;
  --dur-cinema: 1200ms;
}

/* Reveal on scroll, used by hero/pain/services modules */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scale-in {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

/* Kinetic typography mask reveal, hero variant A + pain variant A */
@keyframes mask-reveal {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

/* Parallax scroll, hero variant B */
@keyframes parallax-drift {
  from { transform: translateY(0); }
  to   { transform: translateY(-15%); }
}

/* Card flip, services variant B */
@keyframes flip-y {
  from { transform: rotateY(0); }
  to   { transform: rotateY(180deg); }
}

/* Sticky stack, audit variant A */
.sticky-stack-card {
  position: sticky;
  top: var(--space-6);
  transition: transform var(--dur-base) var(--ease-default);
}

/* Fade-up utility: GSAP/ScrollTrigger compatible (data-anim="fade-up") */
[data-anim="fade-up"] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
[data-anim="fade-up"].in-view {
  opacity: 1;
  transform: translateY(0);
}

[data-anim="fade-in"] {
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out);
}
[data-anim="fade-in"].in-view {
  opacity: 1;
}

[data-anim="scale-in"] {
  opacity: 0;
  transform: scale(0.96);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
[data-anim="scale-in"].in-view {
  opacity: 1;
  transform: scale(1);
}

/* Stagger via per-child --stagger-i (e.g., style="--stagger-i: 1") */
[data-anim][data-stagger] {
  transition-delay: calc(var(--stagger-i, 0) * 80ms);
}

/* Reduce motion respect */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  [data-anim] { opacity: 1 !important; transform: none !important; }
}