:root {
  --bg-deep: #130a14;
  --bg-card: rgba(26, 14, 27, 0.7);
  --border-rose: rgba(255, 179, 193, 0.25);
  --rose-primary: #e8849b;
  --rose-soft: #f4b6c2;
  --rose-glow: rgba(232, 132, 155, 0.35);

  /* Elegant Deep Midnight Bordeaux Envelope */
  --envelope-start: #241322;
  --envelope-end: #170b16;
  --envelope-flap-start: #2f182c;
  --envelope-flap-end: #200f1e;
  --envelope-border: rgba(224, 175, 190, 0.22);
  --envelope-glow: rgba(212, 163, 71, 0.15);

  /* Antique Champagne Gold Wax Seal */
  --wax-seal: radial-gradient(circle at 35% 35%, #ffea9e 0%, #d9a84a 50%, #8a5e14 85%, #593c0a 100%);
  --wax-border: #edd287;
  --wax-glow: rgba(217, 168, 74, 0.55);

  --paper-bg: #fffbf7;
  --paper-text: #2a1f26;
  --paper-subtle: #6b5361;
  --transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-deep);
  color: #fff;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Ambient Romantic Glow */
.ambient-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: 
    radial-gradient(circle at 50% 15%, rgba(190, 18, 60, 0.16) 0%, transparent 55%),
    radial-gradient(circle at 15% 85%, rgba(136, 8, 37, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(225, 29, 72, 0.08) 0%, transparent 45%);
}

/* Falling Red Rose Petals */
.petals-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.petal {
  position: absolute;
  background: radial-gradient(circle at 35% 30%, #e11d48 0%, #be123c 45%, #880825 80%, #4a0314 100%);
  border-radius: 65% 0 65% 65%;
  opacity: 0.85;
  filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.45));
  animation: fall linear infinite;
  box-shadow: inset -1px -1px 3px rgba(0, 0, 0, 0.4);
}

@keyframes fall {
  0% {
    transform: translateY(-25px) translateX(0px) rotate(0deg) rotateY(0deg) scale(0.75);
    opacity: 0;
  }
  15% {
    opacity: 0.85;
    transform: translateY(15vh) translateX(15px) rotate(60deg) rotateY(45deg) scale(0.85);
  }
  50% {
    transform: translateY(50vh) translateX(-15px) rotate(190deg) rotateY(120deg) scale(0.9);
  }
  85% {
    opacity: 0.85;
    transform: translateY(85vh) translateX(12px) rotate(300deg) rotateY(160deg) scale(0.95);
  }
  100% {
    transform: translateY(105vh) translateX(0px) rotate(380deg) rotateY(180deg) scale(1);
    opacity: 0;
  }
}

/* Page Layout */
.letter-page {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 24px;
}

/* Top Nav */
.top-nav {
  max-width: 760px;
  width: 100%;
  margin: 0 auto 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.nav-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--rose-soft);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-rose);
  padding: 8px 16px;
  border-radius: 100px;
  transition: var(--transition);
}

.nav-back-link:hover {
  background: rgba(232, 132, 155, 0.2);
  transform: translateX(-3px);
}

.journey-badge {
  font-family: 'Great Vibes', cursive;
  font-size: 1.5rem;
  color: var(--rose-soft);
  letter-spacing: 1px;
}

/* Envelope Scene */
.envelope-scene {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 20px auto 40px;
  width: 100%;
  max-width: 680px;
}

.prompt-hint {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(26, 14, 27, 0.8);
  border: 1px solid var(--border-rose);
  padding: 10px 24px;
  border-radius: 100px;
  margin-bottom: 24px;
  box-shadow: 0 4px 20px var(--rose-glow);
  transition: opacity 0.4s ease;
}

.tap-icon {
  font-size: 1.2rem;
  animation: bounce 1.8s infinite ease-in-out;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.hint-msg {
  font-size: 0.9rem;
  color: var(--rose-soft);
  letter-spacing: 0.5px;
}

/* The Envelope Container */
.envelope-wrapper {
  perspective: 1200px;
  width: 100%;
  max-width: 600px;
  position: relative;
  cursor: pointer;
}

.envelope {
  position: relative;
  width: 100%;
  height: 380px;
  background: linear-gradient(135deg, var(--envelope-start), var(--envelope-end));
  border-radius: 20px;
  border: 1px solid var(--envelope-border);
  box-shadow: 
    0 25px 60px -10px rgba(0, 0, 0, 0.8),
    0 0 50px -5px var(--envelope-glow);
  transition: height 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: visible;
}

/* Triangular Flap */
.envelope-flap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 190px;
  background: linear-gradient(180deg, var(--envelope-flap-start), var(--envelope-flap-end));
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
  transform-origin: top center;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), z-index 0.2s 0.3s;
  z-index: 5;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}

/* Antique Champagne Gold Wax Seal */
.wax-seal {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 64px;
  background: var(--wax-seal);
  border-radius: 50%;
  border: 2px solid var(--wax-border);
  box-shadow: 
    0 4px 18px rgba(0, 0, 0, 0.75), 
    0 0 25px var(--wax-glow),
    inset 0 2px 4px rgba(255, 255, 255, 0.65),
    inset 0 -2px 6px rgba(60, 40, 5, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
  z-index: 6;
}

.wax-seal:hover {
  transform: translateX(-50%) scale(1.12);
  box-shadow: 
    0 6px 26px rgba(0, 0, 0, 0.8),
    0 0 35px var(--wax-glow),
    inset 0 2px 5px rgba(255, 255, 255, 0.85);
}

.seal-inner-stamp {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1.5px dashed rgba(84, 56, 7, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 2px 4px rgba(70, 45, 5, 0.35);
}

.seal-svg {
  color: #4a3005;
  filter: drop-shadow(0 1px 0px rgba(255, 240, 185, 0.7));
  user-select: none;
}

/* Envelope Pocket (Front folded sides) */
.envelope-pocket {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 20px;
  background: 
    linear-gradient(45deg, transparent 48%, rgba(255, 230, 235, 0.12) 50%, transparent 52%),
    linear-gradient(-45deg, transparent 48%, rgba(255, 230, 235, 0.12) 50%, transparent 52%),
    linear-gradient(to top, rgba(100, 20, 36, 0.35), transparent);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 3;
}

/* The Letter Paper (Hidden inside initially) */
.letter-paper {
  position: absolute;
  top: 15px;
  left: 5%;
  width: 90%;
  min-height: 350px;
  background: var(--paper-bg);
  color: var(--paper-text);
  border-radius: 14px;
  box-shadow: 0 15px 45px rgba(0, 0, 0, 0.5);
  padding: 36px 32px;
  transform: translateY(0) scale(0.96);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.5s ease;
  z-index: 2;
  border: 1px solid #ebd3c8;
}

/* OPENED STATE */
.envelope.is-open .envelope-flap {
  transform: rotateX(180deg);
  z-index: 1;
}

.envelope.is-open .wax-seal {
  opacity: 0;
  pointer-events: none;
}

.envelope.is-open {
  height: auto;
  min-height: 580px;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  cursor: default;
}

.envelope.is-open .envelope-pocket {
  opacity: 0;
  transition: opacity 0.4s ease;
}

.envelope.is-open .letter-paper {
  position: relative;
  left: 0;
  width: 100%;
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  z-index: 10;
  box-shadow: 
    0 25px 65px -10px rgba(0, 0, 0, 0.8),
    0 0 40px -5px rgba(232, 132, 155, 0.3);
}

/* Letter Content Typography */
.letter-header {
  text-align: center;
  margin-bottom: 24px;
  border-bottom: 1px dashed #e3c4bd;
  padding-bottom: 18px;
}

.letter-sub {
  font-family: 'Great Vibes', cursive;
  font-size: 1.6rem;
  color: #a84860;
  display: block;
  margin-bottom: 2px;
}

.letter-to {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 2.1rem;
  font-weight: 600;
  color: #1e0e1b;
  letter-spacing: 1px;
}

.letter-ornament {
  font-size: 0.85rem;
  color: #c46b80;
  margin-top: 6px;
  letter-spacing: 3px;
}

.letter-body {
  font-family: 'Noto Sans Myanmar', 'Padauk', 'Pyidaungsu', system-ui, sans-serif;
  font-size: 1.05rem;
  line-height: 1.95;
  color: #2e1c25;
}

.letter-body p {
  margin-bottom: 18px;
}

.myanmar-text {
  text-align: justify;
}

.highlight-quote {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-style: italic;
  font-size: 1.35rem;
  color: #8f233f;
  text-align: center;
  padding: 10px 18px;
  background: rgba(232, 132, 155, 0.12);
  border-left: 3px solid #c93b58;
  border-radius: 6px;
  margin: 20px 0;
}

.english-line {
  font-style: italic;
  color: #523744;
}

.closing-box {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px dashed #e3c4bd;
}

.farewell-text {
  font-weight: 500;
  font-size: 1.15rem;
  color: #1a0b16;
  margin-bottom: 4px;
}

.hope-text {
  font-style: italic;
  color: #6b4d5b;
}

/* Signature */
.letter-signature {
  margin-top: 32px;
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.sign-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #8c6a7a;
}

.sign-name {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.6rem;
  font-weight: 600;
  color: #a82f4c;
  letter-spacing: 1px;
}

.sign-date {
  font-size: 0.8rem;
  color: #8c6a7a;
  letter-spacing: 1px;
  font-family: monospace;
}

/* After Open Actions */
.after-open-actions {
  display: none;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
  justify-content: center;
}

.envelope.is-open ~ .after-open-actions {
  display: flex;
}

.btn-view-art {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #e8849b, #d96582);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 12px 26px;
  border-radius: 100px;
  text-decoration: none;
  box-shadow: 0 6px 20px var(--rose-glow);
  transition: var(--transition);
}

.btn-view-art:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #f294aa, #e37490);
}

.btn-subtle {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-rose);
  color: var(--rose-soft);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 12px 22px;
  border-radius: 100px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-subtle:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Footer */
.letter-footer {
  text-align: center;
  margin-top: auto;
  padding: 24px 0 10px;
  font-size: 0.85rem;
  color: var(--paper-subtle);
}

.letter-footer p {
  color: rgba(244, 182, 194, 0.7);
}

@media (max-width: 600px) {
  .envelope {
    height: 320px;
  }
  .envelope-flap {
    height: 160px;
  }
  .letter-paper {
    padding: 26px 20px;
  }
  .letter-to {
    font-size: 1.7rem;
  }
  .letter-body {
    font-size: 0.98rem;
  }
}