/* ============================================
   Monogatari — Animations
   ============================================ */

/* ── スクロールリビール ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* ── ステージド・アニメーション ── */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ── ランタン光の揺らぎ ── */
@keyframes lanternFlicker {
  0%, 100% { 
    opacity: 0.6; 
    filter: brightness(1) blur(0px);
  }
  25% { 
    opacity: 0.8; 
    filter: brightness(1.1) blur(0.5px);
  }
  50% { 
    opacity: 0.5; 
    filter: brightness(0.95) blur(0px);
  }
  75% { 
    opacity: 0.9; 
    filter: brightness(1.15) blur(0.3px);
  }
}

.lantern-glow {
  animation: lanternFlicker 4s ease-in-out infinite;
}

/* ── 浮遊アニメーション ── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(-6px) rotate(1deg); }
  66% { transform: translateY(-3px) rotate(-1deg); }
}

.float { animation: float 5s ease-in-out infinite; }
.float-slow { animation: floatSlow 8s ease-in-out infinite; }

/* ── パルス ── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 10px rgba(212, 168, 83, 0.2); }
  50% { box-shadow: 0 0 30px rgba(212, 168, 83, 0.4); }
}

.pulse { animation: pulse 2s ease-in-out infinite; }
.pulse-glow { animation: pulseGlow 3s ease-in-out infinite; }

/* ── 回転 ── */
@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.spin-slow { animation: spinSlow 30s linear infinite; }

/* ── 錠前アニメーション ── */
@keyframes lockShake {
  0%, 100% { transform: translateX(0); }
  10% { transform: translateX(-8px); }
  20% { transform: translateX(8px); }
  30% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  50% { transform: translateX(-4px); }
  60% { transform: translateX(4px); }
  70% { transform: translateX(-2px); }
  80% { transform: translateX(2px); }
}

.lock-shake {
  animation: lockShake 0.6s ease-in-out;
}

@keyframes lockUnlock {
  0% { transform: rotate(0deg) scale(1); }
  30% { transform: rotate(-15deg) scale(1.1); }
  60% { transform: rotate(5deg) scale(0.9); opacity: 1; }
  100% { transform: rotate(0deg) scale(0); opacity: 0; }
}

.lock-unlock {
  animation: lockUnlock 1s ease forwards;
}

/* ── ページトランジション ── */
@keyframes pageFlipIn {
  0% {
    opacity: 0;
    transform: perspective(1200px) rotateY(-15deg) translateX(50px);
  }
  100% {
    opacity: 1;
    transform: perspective(1200px) rotateY(0deg) translateX(0);
  }
}

@keyframes pageFlipOut {
  0% {
    opacity: 1;
    transform: perspective(1200px) rotateY(0deg) translateX(0);
  }
  100% {
    opacity: 0;
    transform: perspective(1200px) rotateY(15deg) translateX(-50px);
  }
}

.page-flip-in {
  animation: pageFlipIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.page-flip-out {
  animation: pageFlipOut 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* ── テキストシマー ── */
@keyframes textShimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.text-shimmer {
  background: linear-gradient(
    90deg,
    var(--color-gold-dim) 0%,
    var(--color-gold-bright) 25%,
    var(--color-gold) 50%,
    var(--color-gold-bright) 75%,
    var(--color-gold-dim) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: textShimmer 4s linear infinite;
}

/* ── ボーダーグロー ── */
@keyframes borderGlow {
  0%, 100% { border-color: var(--color-border); }
  50% { border-color: var(--color-gold-dim); }
}

.border-glow {
  animation: borderGlow 4s ease-in-out infinite;
}

/* ── パーティクル用キーフレーム ── */
@keyframes particleFade {
  0% { opacity: 0; transform: translateY(0) scale(0); }
  20% { opacity: 1; transform: translateY(-20px) scale(1); }
  100% { opacity: 0; transform: translateY(-100px) scale(0.5); }
}

@keyframes dustFloat {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  25% { opacity: 0.6; }
  50% { transform: translateY(-50vh) translateX(20px); opacity: 0.3; }
  75% { opacity: 0.1; }
  100% { transform: translateY(-100vh) translateX(-10px); opacity: 0; }
}