/* ============================================================
   animations.css
   キーフレームアニメーションと、スクロールで要素が現れる演出
   ============================================================ */

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* ティファニーブルーが呼吸するように明滅する上品なネオングロー */
@keyframes tiffany-breathe {
  0%, 100% {
    filter: saturate(1);
    box-shadow: 0 0 10px var(--color-tiffany-glow-strong), 0 0 28px var(--color-tiffany-glow);
  }
  50% {
    filter: saturate(1.18) brightness(1.08);
    box-shadow: 0 0 16px var(--color-tiffany-ice), 0 0 42px var(--color-tiffany-glow-strong), 0 0 90px var(--color-tiffany-glow);
  }
}

@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* -50%だけでは gap の分だけ着地点がずれてループ時にカクつくため、
   gap(20px)の半分を追加で補正しシームレスにつなげる */
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(calc(-50% - 10px)); }
}

/* 動きに敏感なユーザーには、マーキーではなく折り返しグリッドで表示 */
@media (prefers-reduced-motion: reduce) {
  .client-track {
    animation: none;
    flex-wrap: wrap;
    width: 100%;
  }

  .client-marquee {
    overflow: visible;
    mask-image: none;
    -webkit-mask-image: none;
  }

  .client-track-dup {
    display: none;
  }
}

/* ---------- スクロールリビール（JS の IntersectionObserver と連動） ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

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

[data-reveal="fade"] {
  transform: none;
}

[data-reveal="scale"] {
  transform: scale(0.92);
}

[data-reveal="scale"].is-visible {
  transform: scale(1);
}

/* stagger: 子要素に少しずつ遅延をつける */
[data-reveal-group] > * {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

[data-reveal-group].is-visible > *:nth-child(1) { transition-delay: 0.05s; }
[data-reveal-group].is-visible > *:nth-child(2) { transition-delay: 0.12s; }
[data-reveal-group].is-visible > *:nth-child(3) { transition-delay: 0.19s; }
[data-reveal-group].is-visible > *:nth-child(4) { transition-delay: 0.26s; }
[data-reveal-group].is-visible > *:nth-child(5) { transition-delay: 0.33s; }
[data-reveal-group].is-visible > *:nth-child(6) { transition-delay: 0.4s; }
[data-reveal-group].is-visible > *:nth-child(n+7) { transition-delay: 0.46s; }

.hero-badge .dot {
  animation: pulse-dot 2s infinite;
}

/* 主要CTAとロゴだけを発光させ、画面全体がまぶしくなりすぎるのを防ぎます */
.btn-primary,
.logo-mark {
  animation: tiffany-breathe 4.5s ease-in-out infinite;
}

.btn-primary:hover {
  animation-play-state: paused;
}

@media (prefers-reduced-motion: reduce) {
  .btn-primary,
  .logo-mark {
    animation: none;
  }
}