/* ==========================================================================
   icraft アニメーション定義
   Intersection Observer と連動した CSS アニメーション
   ========================================================================== */


/* ------------------------------------------------------------------
   フェードイン基本設定
   ------------------------------------------------------------------ */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 遅延バリアント */
.fade-in--delay-1 { transition-delay: 0.1s; }
.fade-in--delay-2 { transition-delay: 0.2s; }
.fade-in--delay-3 { transition-delay: 0.3s; }
.fade-in--delay-4 { transition-delay: 0.4s; }
.fade-in--delay-5 { transition-delay: 0.5s; }


/* ------------------------------------------------------------------
   スライドイン
   ------------------------------------------------------------------ */

.slide-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.slide-in-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.slide-in-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.slide-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ------------------------------------------------------------------
   スケールイン
   ------------------------------------------------------------------ */

.scale-in {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.scale-in.is-visible {
  opacity: 1;
  transform: scale(1);
}


/* ------------------------------------------------------------------
   ライン描画（装飾ライン）
   ------------------------------------------------------------------ */

.line-draw {
  position: relative;
  overflow: hidden;
}
.line-draw::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-blue);
  transition: width 0.8s ease;
}
.line-draw.is-visible::after {
  width: 100%;
}


/* ------------------------------------------------------------------
   カウンターアニメーション（JSと連動）
   ------------------------------------------------------------------ */

.counter-number {
  display: inline-block;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}


/* ------------------------------------------------------------------
   ヒーローパーラックス
   ------------------------------------------------------------------ */

.hero-parallax {
  will-change: transform;
  transition: transform 0.1s linear;
}


/* ------------------------------------------------------------------
   ホバーアニメーション（カード）
   ------------------------------------------------------------------ */

.card-hover {
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}


/* ------------------------------------------------------------------
   ナビゲーションリンク下線アニメーション
   ------------------------------------------------------------------ */

.nav-link-underline {
  position: relative;
}
.nav-link-underline::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-normal);
}
.nav-link-underline:hover::after,
.nav-link-underline.is-active::after {
  width: 100%;
}


/* ------------------------------------------------------------------
   ページ遷移（ローディング）
   ------------------------------------------------------------------ */

.page-loader {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
.page-loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.page-loader__logo {
  font-family: var(--font-en);
  font-size: var(--text-3xl);
  color: var(--color-primary);
  letter-spacing: var(--ls-widest);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}


/* ------------------------------------------------------------------
   モーションを減らす設定（アクセシビリティ）
   ------------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .slide-in-left,
  .slide-in-right,
  .slide-in-up,
  .scale-in {
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .line-draw::after {
    transition: none !important;
    width: 100%;
  }

  .card-hover:hover {
    transform: none;
  }
}