/* =========================================================
   SITE 53 AURORA PRISM — motion（reveal / parallax の状態）
   reveal: fade-in（光がにじむ）基調＋ fade-left（レール）。原則1回再生。
   easing cubic-bezier(.22,1,.36,1) / duration 600〜900ms / stagger 60〜100ms
   ========================================================= */

/* reveal 初期状態 */
[data-reveal] {
  opacity: 0;
  transition:
    opacity 800ms cubic-bezier(.22, 1, .36, 1),
    transform 800ms cubic-bezier(.22, 1, .36, 1);
  will-change: opacity, transform;
}
[data-reveal="fade-in"]   { transform: none; }
[data-reveal="fade-up"]   { transform: translateY(28px); }
[data-reveal="fade-left"] { transform: translateX(34px); }
[data-reveal="scale-soft"]{ transform: scale(0.96); }

[data-reveal].is-in { opacity: 1; transform: none; }

/* グループ内 stagger（子に遅延） */
[data-reveal-group] > * {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms cubic-bezier(.22, 1, .36, 1),
    transform 700ms cubic-bezier(.22, 1, .36, 1);
}
[data-reveal-group].is-in > * { opacity: 1; transform: none; }
[data-reveal-group].is-in > *:nth-child(2) { transition-delay: 80ms; }
[data-reveal-group].is-in > *:nth-child(3) { transition-delay: 160ms; }
[data-reveal-group].is-in > *:nth-child(4) { transition-delay: 240ms; }

/* ヒーローの初期フェード（長いローディングは作らない） */
.hero__inner > * { opacity: 0; transform: translateY(16px); animation: heroIn 720ms cubic-bezier(.22, 1, .36, 1) forwards; }
.hero__inner > *:nth-child(1) { animation-delay: 60ms; }
.hero__inner > *:nth-child(2) { animation-delay: 140ms; }
.hero__inner > *:nth-child(3) { animation-delay: 220ms; }
.hero__inner > *:nth-child(4) { animation-delay: 300ms; }
.hero__inner > *:nth-child(5) { animation-delay: 380ms; }
@keyframes heroIn { to { opacity: 1; transform: none; } }

/* イベント切替時の柔らかいフェード（点滅させない） */
.event__feature.is-swapping { opacity: 0.35; transition: opacity 180ms ease; }

/* ===== prefers-reduced-motion: すべての演出を停止 ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal], [data-reveal-group] > * { opacity: 1 !important; transform: none !important; }
  .hero__inner > * { opacity: 1 !important; transform: none !important; }
  .hero__orb, .hero__follow { transform: none !important; }
  [data-parallax] { transform: none !important; }
}