.opening-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: radial-gradient(120% 90% at 50% 30%, #24101c 0%, #0d0509 75%);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 1.6s var(--ease-silk), visibility 1.6s;
}
.opening-overlay.fading-out { opacity: 0; pointer-events: none; }

.opening-particles { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.opening-particle {
  position: absolute; bottom: -10px; border-radius: 50%;
  background: radial-gradient(circle, rgba(232,194,122,0.95) 0%, rgba(232,194,122,0) 70%);
  animation: softDrift linear infinite;
}

.opening-stage {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 2rem; max-width: 640px; width: 100%;
  min-height: 220px;
}

.opening-line {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-style: italic;
  line-height: 1.6;
  color: #f7ece9;
  text-shadow: 0 2px 16px rgba(0,0,0,0.6);
  opacity: 0;
  position: absolute;
  max-width: 560px;
}
.opening-line.dear { font-family: var(--font-hand); font-size: 2.6rem; font-style: normal; color: var(--accent-gold); }
.opening-line.show {
  animation: openingLineIn 3.6s var(--ease-silk) forwards;
}
@keyframes openingLineIn {
  0% { opacity: 0; transform: translateY(14px); }
  18% { opacity: 1; transform: translateY(0); }
  78% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-10px); }
}

.opening-heart {
  font-size: 3.2rem;
  opacity: 0;
  animation: fadeRiseIn 1.4s var(--ease-silk) forwards, glowPulse 2.6s ease-in-out 1.4s infinite;
}

.opening-begin-btn {
  margin-top: 2.4rem;
  padding: 15px 44px;
  border-radius: 34px;
  border: 1px solid rgba(232,194,122,0.55);
  background: linear-gradient(135deg, rgba(201,67,90,0.9), rgba(139,32,52,0.9));
  color: #fff7ec;
  font-family: var(--font-ui);
  font-size: 1.15rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: transform 0.35s var(--ease-soft), box-shadow 0.35s var(--ease-soft);
  box-shadow: 0 10px 30px rgba(139,32,52,0.45);
  animation: fadeRiseIn 1.2s var(--ease-silk) forwards;
}
.opening-begin-btn:hover { transform: translateY(-3px); box-shadow: 0 14px 36px rgba(139,32,52,0.6); }
.opening-begin-btn:active { transform: translateY(0); }

.opening-skip {
  position: absolute; bottom: 28px; right: 28px;
  background: none; border: none; color: rgba(255,255,255,0.35);
  font-family: var(--font-ui); font-size: 0.85rem; letter-spacing: 0.05em;
  cursor: pointer; z-index: 3; transition: color 0.3s ease;
}
.opening-skip:hover { color: rgba(255,255,255,0.7); }