/* ============================================================
   ANIMATIONS — Scroll-triggered fade-ins, hover transitions
   ============================================================ */

/* ---- Scroll Fade ---- */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay variants */
[data-animate][data-delay="80"]  { transition-delay:  80ms; }
[data-animate][data-delay="100"] { transition-delay: 100ms; }
[data-animate][data-delay="160"] { transition-delay: 160ms; }
[data-animate][data-delay="200"] { transition-delay: 200ms; }
[data-animate][data-delay="240"] { transition-delay: 240ms; }
[data-animate][data-delay="300"] { transition-delay: 300ms; }
[data-animate][data-delay="400"] { transition-delay: 400ms; }
[data-animate][data-delay="500"] { transition-delay: 500ms; }
[data-animate][data-delay="600"] { transition-delay: 600ms; }

/* Slide from left */
[data-animate="slide-left"] {
  opacity: 0;
  transform: translateX(-32px);
}
[data-animate="slide-left"].is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale in */
[data-animate="scale"] {
  opacity: 0;
  transform: scale(0.96);
}
[data-animate="scale"].is-visible {
  opacity: 1;
  transform: scale(1);
}

/* ---- Stagger Group ---- */
[data-animate-group] > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

[data-animate-group].is-visible > *:nth-child(1) { transition-delay:   0ms; }
[data-animate-group].is-visible > *:nth-child(2) { transition-delay:  80ms; }
[data-animate-group].is-visible > *:nth-child(3) { transition-delay: 160ms; }
[data-animate-group].is-visible > *:nth-child(4) { transition-delay: 240ms; }
[data-animate-group].is-visible > *:nth-child(5) { transition-delay: 320ms; }
[data-animate-group].is-visible > *:nth-child(6) { transition-delay: 400ms; }

[data-animate-group].is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ---- CORUS stamp animations ---- */
/* The room is alive: dots circle slowly, inner ring breathes. */
@keyframes bh-corus-rotate {
  to { transform: rotate(360deg); }
}

@keyframes bh-corus-breathe {
  0%, 100% {
    transform: scale(1);
    opacity: 0.45;
  }
  50% {
    transform: scale(1.04);
    opacity: 0.75;
  }
}

@keyframes bh-corus-shimmer {
  0%, 100% { opacity: 0.35; }
  50%      { opacity: 0.7; }
}

/* ---- Site-wide ambient frequency ---- */
/* Brand sigils (✦ ◎) — a slow breath. Same metaphor as the CORUS stamp pulse, scaled down. */
@keyframes bh-frequency-breathe {
  0%, 100% { transform: scale(1);    opacity: 0.85; }
  50%      { transform: scale(1.10); opacity: 1; }
}

/* Three Frequencies — Still: deeply slow, almost imperceptible drift (the room at rest). */
@keyframes bh-freq-still {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.025); }
}

/* Three Frequencies — Alive: a gentle pulse (the dancer's rhythm, the room awake). */
@keyframes bh-freq-alive {
  0%, 100% { transform: scale(1);     filter: brightness(1); }
  50%      { transform: scale(1.018); filter: brightness(1.05); }
}

/* Three Frequencies — Felt: warm glow that breathes (the violet-light reverence). */
@keyframes bh-freq-felt {
  0%, 100% { filter: brightness(1)    saturate(1); }
  50%      { filter: brightness(1.06) saturate(1.10); }
}

/* Section divider — iridescent wave passes through every ~11s. A slow heartbeat. */
@keyframes bh-freq-divider-sweep {
  0%, 75% { transform: translateX(-100%); opacity: 0; }
  80%     { opacity: 0.85; }
  92%     { transform: translateX(100%); opacity: 0.85; }
  100%    { transform: translateX(100%); opacity: 0; }
}

/* Hero bloom — twin-video crossfade for seamless never-ending loop.
   Two videos play the same clip 4s out of phase; opacity peaks when each is
   in the bloom middle and goes to 0 right at the loop snap, hiding it. */
@keyframes bh-hero-bloom-fade {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0; }
}

/* ---- Respect reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  [data-animate],
  [data-animate-group] > * {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__scroll-line,
  .bh-corus__stamp-rotor,
  .bh-corus__stamp-pulse,
  .bh-corus__stamp-sparkle,
  .bh-pillar__mark,
  .bh-collection__mark,
  .fp-eco-card__mark,
  .apply-success__mark,
  .fp-freq-card__img img,
  .divider::after {
    animation: none;
  }
}