/* Letter bloom — original flower sprites, circular burst */

.letter-bloom {
  position: relative;
  min-height: min(88vh, 760px);
}

.letter-bloom.is-blooming .letter-bloom-envelope {
  animation: lb-pulse 0.55s ease;
}

@keyframes lb-pulse {
  0% { transform: scale(1); }
  45% { transform: scale(1.06); }
  100% { transform: scale(0.96); }
}

.letter-bloom-stage {
  position: relative;
  z-index: 3;
  display: grid;
  place-items: center;
  min-height: min(78vh, 640px);
  padding: 2rem 1rem 3rem;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.letter-bloom.is-open .letter-bloom-stage {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.9);
  min-height: 0;
  height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.letter-bloom.is-open {
  min-height: 0;
}

.letter-bloom-open {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  display: grid;
  gap: 0.9rem;
  justify-items: center;
  max-width: min(92vw, 320px);
  transition: transform 0.25s ease;
}

.letter-bloom-open:hover,
.letter-bloom-open:focus-visible {
  transform: translateY(-3px) scale(1.02);
  outline: none;
}

.letter-bloom-envelope {
  width: min(76vw, 260px);
  height: auto;
  display: block;
  filter: drop-shadow(0 16px 30px rgba(60, 30, 40, 0.22));
  user-select: none;
  -webkit-user-drag: none;
  animation: lb-float 3.2s ease-in-out infinite;
}

@keyframes lb-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.letter-bloom-hint {
  margin: 0;
  font-family: "Cormorant Garamond", "Fraunces", Georgia, serif;
  font-size: 1.05rem;
  color: #6a4a52;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.letter-bloom-hint-ico {
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 999px;
  border: 1.5px solid rgba(106, 74, 82, 0.35);
  display: inline-grid;
  place-items: center;
  font-size: 0.65rem;
}

.letter-bloom-burst {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  overflow: hidden;
}

.lb-petal {
  position: fixed;
  display: block;
  margin: 0;
  object-fit: contain;
  max-width: 120px;
  max-height: 120px;
  transform: translate(-50%, -50%) scale(0.12) rotate(var(--rot0, 0deg));
  opacity: 0;
  filter: drop-shadow(0 6px 10px rgba(80, 30, 50, 0.18));
  animation: lb-burst 1.55s cubic-bezier(0.14, 0.82, 0.22, 1) forwards;
  animation-delay: var(--delay, 0s);
  will-change: transform, opacity;
}

@keyframes lb-burst {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.08) rotate(var(--rot0, 0deg));
  }
  10% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  100% {
    opacity: 0.15;
    transform: translate(calc(-50% + var(--tx)), calc(-50% + var(--ty))) scale(1) rotate(var(--rot1, 180deg));
  }
}

.letter-bloom.is-open .letter-bloom-burst {
  opacity: 0;
  transition: opacity 0.55s ease 0.1s;
}

.letter-bloom-fill {
  display: none;
}

.letter-bloom-content {
  position: relative;
  z-index: 5;
  padding: 1rem 0 2rem;
  animation: lb-reveal 0.75s ease both;
}

@keyframes lb-reveal {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: none; }
}

body.letter-view-page {
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(196, 92, 106, 0.12), transparent 55%),
    linear-gradient(180deg, #f7efe8 0%, #efe4d8 100%);
}

@media (prefers-reduced-motion: reduce) {
  .lb-petal,
  .letter-bloom-envelope {
    animation: none !important;
  }
}