/* ============================================
   Animations & Keyframes
   kichi - ワクワクをつくる基地
   ============================================ */

/* ── Loading: Chest Float ── */
@keyframes chestFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-10px) scale(1.02); }
}

@keyframes chestShadowFloat {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(0.85); opacity: 0.35; }
}

/* ── Loading: Chest Intense Shake ── */
@keyframes chestIntenseShake {
  0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
  10% { transform: translate(-3px, 1px) rotate(-2deg) scale(1.02); }
  20% { transform: translate(4px, -1px) rotate(2.5deg) scale(1.04); }
  30% { transform: translate(-5px, 2px) rotate(-3deg) scale(1.03); }
  40% { transform: translate(5px, -2px) rotate(3deg) scale(1.06); }
  50% { transform: translate(-4px, 1px) rotate(-2deg) scale(1.05); }
  60% { transform: translate(6px, -1px) rotate(3.5deg) scale(1.08); }
  70% { transform: translate(-5px, 2px) rotate(-3deg) scale(1.07); }
  80% { transform: translate(4px, -2px) rotate(2.5deg) scale(1.09); }
  90% { transform: translate(-3px, 1px) rotate(-1.5deg) scale(1.08); }
}

/* ── Loading: Chest Lid 3D Open ── */
@keyframes chestLid3DOpen {
  0% {
    transform: rotateX(0deg);
  }
  20% {
    transform: rotateX(15deg);
  }
  50% {
    transform: rotateX(-80deg);
  }
  75% {
    transform: rotateX(-135deg);
  }
  88% {
    transform: rotateX(-115deg);
  }
  100% {
    transform: rotateX(-125deg);
  }
}

/* ── Loading: Lock Snap ── */
@keyframes chestLockSnap {
  0% { transform: scale(1) translateY(0); }
  40% { transform: scale(1.3) translateY(8px) rotate(15deg); opacity: 1; }
  100% { transform: scale(0.6) translateY(24px) rotate(45deg); opacity: 0; }
}

/* ── Loading: Inner Magic Glow Burst ── */
@keyframes chestInnerGlowBurst {
  0% {
    transform: scale(0.3);
    opacity: 0;
  }
  40% {
    opacity: 0.9;
    transform: scale(1.2);
  }
  100% {
    opacity: 1;
    transform: scale(1.6);
  }
}

/* ── Loading: Light Rays Spin ── */
@keyframes raysSpin {
  0% {
    transform: translate(-50%, -50%) rotate(0deg) scale(0.6);
    opacity: 0;
  }
  30% {
    opacity: 0.8;
  }
  100% {
    transform: translate(-50%, -50%) rotate(180deg) scale(1.8);
    opacity: 0;
  }
}

/* ── Loading: Hint Bounce ── */
@keyframes hintBounce {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-5px) scale(1.04); }
}

/* ── Loading: Shape Explode ── */
@keyframes shapeExplode {
  0% {
    transform: translate(0, 0) scale(0) rotate(0deg);
    opacity: 0;
  }
  30% {
    opacity: 1;
    transform: scale(1.2);
  }
  100% {
    opacity: 1;
    transform: var(--shape-end-transform, translate(100px, -200px) scale(1) rotate(45deg));
  }
}

/* ── Floating / Bobbing ── */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0px) rotate(var(--base-rotate, 0deg)); }
  50% { transform: translateY(-8px) rotate(var(--base-rotate, 0deg)); }
}

@keyframes floatRotate {
  0%, 100% { transform: translateY(0) rotate(-3deg); }
  50% { transform: translateY(-10px) rotate(3deg); }
}

/* ── Sticker Appear ── */
@keyframes stickerDrop {
  0% {
    transform: translate(var(--sticker-x, 0), -100vh) rotate(var(--sticker-rotate, 0deg)) scale(0.5);
    opacity: 0;
  }
  60% {
    transform: translate(var(--sticker-x, 0), var(--sticker-y, 0)) rotate(var(--sticker-rotate, 0deg)) scale(1.1);
    opacity: 1;
  }
  80% {
    transform: translate(var(--sticker-x, 0), var(--sticker-y, 0)) rotate(var(--sticker-rotate, 0deg)) scale(0.95);
  }
  100% {
    transform: translate(var(--sticker-x, 0), var(--sticker-y, 0)) rotate(var(--sticker-rotate, 0deg)) scale(1);
    opacity: 1;
  }
}

/* ── Memo Paper Appear ── */
@keyframes memoAppear {
  0% {
    transform: rotate(-3deg) scale(0) translateY(50px);
    opacity: 0;
  }
  60% {
    transform: rotate(-3deg) scale(1.05);
    opacity: 1;
  }
  100% {
    transform: rotate(-3deg) scale(1);
    opacity: 1;
  }
}

/* ── Card Shuffle ── */
@keyframes cardShuffle {
  0% { transform: rotate(var(--card-rotate, 0deg)) scale(1); opacity: 1; }
  50% { transform: rotate(0deg) scale(0.9); opacity: 0.5; }
  100% { transform: rotate(var(--card-rotate, 0deg)) scale(1); opacity: 1; }
}

/* ── Button Press ── */
@keyframes buttonPress {
  0% { transform: translateY(0); }
  50% { transform: translateY(3px); }
  100% { transform: translateY(0); }
}

/* ── Seal / Sticker Wiggle ── */
@keyframes sealWiggle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-5deg); }
  75% { transform: rotate(5deg); }
}

/* ── Stamp Press ── */
@keyframes stampPress {
  0% { transform: scale(1.3) rotate(-5deg); opacity: 0; }
  50% { transform: scale(0.95) rotate(2deg); opacity: 1; }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

/* ── Fade In Up (scroll reveal) ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Fade In Scale ── */
@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ── Confetti fall ── */
@keyframes confettiFall {
  0% {
    transform: translateY(-100%) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

/* ── Paper Plane fly ── */
@keyframes paperPlaneFly {
  0% {
    transform: translateX(0) translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateX(100px) translateY(-60px) rotate(-15deg);
    opacity: 0;
  }
}

/* ── Typing cursor blink ── */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ── Spin (for loading) ── */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ── Pulse ── */
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* ============================================
   Animation Utility Classes
   ============================================ */

/* Scroll-triggered fade in */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }
.reveal--delay-5 { transition-delay: 0.5s; }

/* Floating elements */
.anim-float {
  animation: float 4s ease-in-out infinite;
}

.anim-float-slow {
  animation: floatSlow 6s ease-in-out infinite;
}

.anim-float-rotate {
  animation: floatRotate 5s ease-in-out infinite;
}

/* Parallax data attribute for JS */
[data-parallax] {
  will-change: transform;
  transition: transform 0.1s linear;
}

/* Hover: lift card */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.hover-lift:hover {
  transform: translateY(-6px) rotate(0deg) !important;
  box-shadow: var(--shadow-card-hover);
}

/* Hover: polaroid lift */
.hover-polaroid {
  transition: transform var(--transition-spring), box-shadow var(--transition-base);
}
.hover-polaroid:hover {
  transform: translateY(-10px) rotate(0deg) !important;
  box-shadow: var(--shadow-polaroid-hover);
}

/* ============================================
   Click Particle Burst Animation
   ============================================ */
@keyframes clickBurst {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translate(var(--burst-x), var(--burst-y)) scale(0) rotate(var(--burst-r, 180deg));
    opacity: 0;
  }
}

@keyframes clickRing {
  0% {
    transform: translate(-50%, -50%) scale(0);
    opacity: 0.6;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0;
  }
}

.click-burst-container {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
}

.click-particle {
  position: absolute;
  border-radius: 50%;
  animation: clickBurst 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.click-particle--triangle {
  border-radius: 0;
  width: 0 !important;
  height: 0 !important;
  background: transparent !important;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 10px solid var(--particle-color);
}

.click-particle--square {
  border-radius: 2px;
}

.click-particle--star {
  border-radius: 0;
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

.click-ring {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid;
  animation: clickRing 0.5s ease-out forwards;
}

/* ── Slow floating for hero shapes ── */
@keyframes floatSlow {
  0%, 100% {
    transform: translateY(0) rotate(var(--base-rotate, 0deg));
  }
  33% {
    transform: translateY(-8px) rotate(calc(var(--base-rotate, 0deg) + 3deg));
  }
  66% {
    transform: translateY(4px) rotate(calc(var(--base-rotate, 0deg) - 2deg));
  }
}

/* ── Bounce-in for fun first view ── */
@keyframes bounceIn {
  0% {
    transform: scale(0) rotate(-10deg);
    opacity: 0;
  }
  50% {
    transform: scale(1.15) rotate(2deg);
  }
  70% {
    transform: scale(0.95) rotate(-1deg);
  }
  100% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
}

@keyframes wiggle {
  0%, 100% { transform: rotate(var(--base-rotate, 0deg)); }
  25% { transform: rotate(calc(var(--base-rotate, 0deg) + 4deg)); }
  75% { transform: rotate(calc(var(--base-rotate, 0deg) - 4deg)); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  [data-parallax] {
    transform: none !important;
  }
}