.scene {
  width: min(92vw, 420px);
  aspect-ratio: 1.12 / 1;
  perspective: 1600px;
}

.envelope {
  position: relative;
  width: 100%;
  height: 78%;
  margin: 8% auto 0;
  transform-style: preserve-3d;
  cursor: pointer;
  filter: drop-shadow(0 22px 28px rgba(0, 0, 0, 0.38));
}

.envelope:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 8px;
}

.env-back,
.env-front,
.env-flap-face {
  background-color: var(--env-color, var(--forest));
  background-image:
    radial-gradient(ellipse 80% 50% at 18% 12%, rgba(255, 255, 255, 0.14), transparent 46%),
    radial-gradient(ellipse 70% 60% at 80% 90%, rgba(0, 0, 0, 0.28), transparent 52%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 3px),
    linear-gradient(155deg, var(--env-highlight, #2d5138) 0%, var(--env-color, #1c3826) 46%, var(--env-shadow, #101f16) 100%);
}

.env-back {
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: 7px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.env-card {
  position: absolute;
  z-index: 2;
  left: 7%;
  right: 7%;
  top: 6%;
  height: 155%;
  transform: translateY(42%);
  transition: transform 1.15s 0.42s var(--ease);
}

.envelope.is-open .env-card {
  transform: translateY(-32%);
}

.invite-card {
  height: 100%;
  background:
    linear-gradient(rgba(251, 247, 239, 0.92), rgba(247, 240, 227, 0.94)),
    url("/img/lace.svg") center / 140px repeat,
    #f4ead6;
  border: 10px solid #f7f1e6;
  box-shadow:
    0 0 0 1px rgba(92, 18, 24, 0.12),
    inset 0 0 0 8px rgba(247, 241, 230, 0.9),
    inset 0 0 0 9px rgba(92, 18, 24, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--wine-deep);
  padding: 1.4rem 0.9rem;
}

.invite-card .script {
  font-size: clamp(2.1rem, 8vw, 2.8rem);
  color: var(--wine);
}

.invite-names {
  font-family: var(--display);
  letter-spacing: 0.22em;
  font-size: 0.62rem;
  text-transform: uppercase;
  margin: 0.55rem 0 0.35rem;
}

.invite-meta {
  font-family: var(--display);
  letter-spacing: 0.16em;
  font-size: 0.58rem;
  text-transform: uppercase;
}

.env-front {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 72%;
  z-index: 3;
  border-radius: 0 0 7px 7px;
  clip-path: polygon(0 20%, 50% 0, 100% 20%, 100% 100%, 0 100%);
  box-shadow: inset 0 12px 18px rgba(0, 0, 0, 0.12);
}

.env-flap {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 58%;
  z-index: 4;
  transform-origin: top center;
  transform-style: preserve-3d;
  transition: transform 1.05s var(--ease), z-index 0s 0.5s;
}

.envelope.is-open .env-flap {
  transform: rotateX(-178deg);
  z-index: 1;
}

.envelope.is-open .seal {
  animation: none;
}

@keyframes seal-pulse {
  0%, 100% { filter: drop-shadow(0 0 0 rgba(196, 164, 106, 0)); }
  50% { filter: drop-shadow(0 0 10px rgba(196, 164, 106, 0.55)); }
}

.env-flap-face {
  position: absolute;
  inset: 0;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.env-flap-face--front {
  box-shadow: inset 0 -10px 18px rgba(0, 0, 0, 0.12);
}

.env-flap-face--front::after {
  content: "";
  position: absolute;
  inset: 12% 18% 28%;
  background:
    radial-gradient(circle at 50% 80%, transparent 42%, rgba(196, 164, 106, 0.16) 43%, transparent 46%),
    url("/img/lace.svg") center / 90px repeat;
  opacity: 0.35;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  mix-blend-mode: screen;
}

.env-flap-face--back {
  background: linear-gradient(180deg, #6b1420, #430810 70%);
  transform: rotateX(180deg);
}

.seal {
  position: absolute;
  left: 50%;
  bottom: 6%;
  width: 64px;
  height: 64px;
  transform: translateX(-50%);
  border-radius: 50%;
  animation: seal-pulse 2.8s ease-in-out infinite;
  display: grid;
  place-items: center;
  color: #3b1d0c;
  font-family: var(--display);
  font-size: 1.5rem;
  background:
    radial-gradient(circle at 32% 28%, #e4c08a, #b6793a 38%, #7a4318 68%, #4a250c 100%);
  box-shadow:
    0 8px 14px rgba(0, 0, 0, 0.35),
    inset 0 2px 3px rgba(255, 236, 200, 0.45),
    inset 0 -6px 10px rgba(0, 0, 0, 0.35);
}

.seal::before,
.seal::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: inherit;
  box-shadow: inherit;
}

.seal::before {
  width: 18px;
  height: 18px;
  left: -4px;
  bottom: 8px;
}

.seal::after {
  width: 14px;
  height: 14px;
  right: 2px;
  bottom: -4px;
}

.monogram {
  position: absolute;
  left: 50%;
  bottom: 10%;
  transform: translateX(-50%);
  font-family: var(--script);
  font-size: 1.8rem;
  color: var(--wine);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.35);
}

.envelope-hint {
  margin-top: 1.4rem;
  text-align: center;
  font-family: var(--display);
  font-size: 0.62rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  transition: opacity 0.4s ease;
}

.envelope-hint.is-hidden {
  opacity: 0;
}

.envelope--cream {
  --env-color: #efe4cf;
  --env-highlight: #f7f1e2;
  --env-shadow: #d7c7a8;
}

.envelope--cream .env-flap-face--back {
  background: linear-gradient(180deg, #f4ead8, #e4d5b8);
}

.envelope--cream .invite-card .script {
  color: var(--wine);
}

@media (prefers-reduced-motion: reduce) {
  .env-flap,
  .env-card {
    transition: none;
  }
}