/* ==========================================================================
   ANIMATION.CSS - PREMIUM WEDDING INVITATION KEYFRAMES & REVEALS
   ========================================================================== */

/* 1. Fundamental Keyframes */

/* Loader Bismillah Animation */
@keyframes bismillah-fade-in {
  0% {
    opacity: 0;
    filter: blur(12px);
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    filter: blur(0);
    transform: scale(1);
  }
}

@keyframes bismillah-fade-out {
  0% {
    opacity: 1;
    filter: blur(0);
    transform: scale(1);
  }
  100% {
    opacity: 0;
    filter: blur(8px);
    transform: scale(1.05);
  }
}

/* Wax Seal Idle Pulse (Centered translation preserved) */
@keyframes seal-pulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    box-shadow: var(--seal-shadow);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.05);
    box-shadow: 0 10px 25px rgba(212, 175, 55, 0.35);
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    box-shadow: var(--seal-shadow);
  }
}

/* Envelope Flap 3D Open */
@keyframes open-flap {
  0% {
    transform: rotateX(0deg);
    z-index: 5;
  }
  40% {
    transform: rotateX(90deg);
    z-index: 5;
  }
  100% {
    transform: rotateX(180deg);
    z-index: 1; /* Pushed behind card sliding up */
  }
}

/* Card Sliding Up & Pausing halfway */
@keyframes card-slide-out {
  0% {
    transform: translateY(0);
    z-index: 2;
  }
  50% {
    transform: translateY(-50%);
    z-index: 2;
  }
  60% {
    transform: translateY(-50%);
    z-index: 2;
  }
  100% {
    transform: translateY(-110%);
    z-index: 92; /* Over other elements */
  }
}

/* Envelope Fading away */
@keyframes envelope-fade-out {
  0% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
  100% {
    opacity: 0;
    transform: scale(0.9) translateY(40px);
    pointer-events: none;
  }
}

/* Card Panels 3D Unfolding */
@keyframes unfold-top {
  0% {
    transform: rotateX(0deg);
  }
  100% {
    transform: rotateX(180deg);
  }
}

@keyframes unfold-bottom {
  0% {
    transform: rotateX(0deg);
  }
  100% {
    transform: rotateX(-180deg);
  }
}

/* Scroll indicator dot wheel */
@keyframes wheel-scroll {
  0% {
    transform: translateY(-100%);
  }
  50% {
    transform: translateY(100%);
  }
  100% {
    transform: translateY(-100%);
  }
}

/* 2. Scroll Reveal Animations (Intersection Observer Targets) */

.reveal-element {
  opacity: 0;
  will-change: transform, opacity, filter;
  transition: opacity var(--duration-slow) var(--ease-apple),
              transform var(--duration-slow) var(--ease-apple),
              filter var(--duration-slow) var(--ease-apple);
}

/* Reveal Modes */
.reveal-fade.revealed {
  opacity: 1;
}

.reveal-up {
  transform: translateY(60px);
}
.reveal-up.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-down {
  transform: translateY(-60px);
}
.reveal-down.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-blur {
  filter: blur(15px);
  transform: scale(0.96);
}
.reveal-blur.revealed {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}

.reveal-scale {
  transform: scale(0.9);
}
.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

.reveal-clip-right {
  clip-path: inset(0 100% 0 0);
  transition: clip-path 1.6s var(--ease-apple), opacity 1.6s var(--ease-apple);
}
.reveal-clip-right.revealed {
  opacity: 1;
  clip-path: inset(0 0 0 0);
}

/* Stagger reveals */
.stagger-1 { transition-delay: 0.15s; }
.stagger-2 { transition-delay: 0.3s; }
.stagger-3 { transition-delay: 0.45s; }
.stagger-4 { transition-delay: 0.6s; }
.stagger-5 { transition-delay: 0.75s; }

/* 3. Micro Interactions */

/* Card hover soft reflections */
.card-reflection {
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: skewX(-25deg);
  pointer-events: none;
  z-index: 5;
}

.unfolding-card:hover .card-reflection {
  animation: shine-card 1.5s var(--ease-apple);
}

@keyframes shine-card {
  0% {
    left: -100%;
  }
  100% {
    left: 200%;
  }
}

/* Button Shimmer */
.shimmer-effect {
  position: relative;
  overflow: hidden;
}

.shimmer-effect::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 30%;
  height: 200%;
  background: rgba(255, 255, 255, 0.18);
  transform: rotate(30deg);
  transition: all 0.5s;
  pointer-events: none;
}

.shimmer-effect:hover::after {
  left: 130%;
  transition: all 0.8s var(--ease-apple);
}

/* Wax Seal cracked piece fadeout */
.wax-fragment {
  position: absolute;
  background: linear-gradient(135deg, #FFEFA6 0%, #D4AF37 50%, #AA7C11 100%);
  border-radius: 50% 30% 60% 40%;
  box-shadow: inset 1px 1px 1px rgba(255, 255, 255, 0.65), 0 3px 6px rgba(0, 0, 0, 0.25);
  pointer-events: none;
  opacity: 1;
  transition: transform 1.2s cubic-bezier(0.1, 0.8, 0.3, 1), opacity 1.2s ease-out;
}