.portada {
  --inclinacion: -2deg;
  --ancho: 200px;
  --ancho: max(150px, min(72vw, 300px, calc((100vh - 360px) / 1.4)));
  --u: calc(var(--ancho) / 100);

  display: none;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1000;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 20px;
  padding-top: max(20px, env(safe-area-inset-top));
  padding-bottom: max(20px, env(safe-area-inset-bottom));
  color: #f7f1e6;
}

.portada::-webkit-scrollbar {
  display: none;
}

.js .portada {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.portada__fondo {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: radial-gradient(ellipse at 50% 30%, #394b3d 0%, #25362e 72%, #1c2b25 100%);
}

.portada__fondo::before {
  content: "";
  position: absolute;
  top: 13px;
  right: 13px;
  bottom: 13px;
  left: 13px;
  border: 1px solid rgba(211, 188, 132, 0.3);
}

.portada__contenido {
  position: relative;
  width: 100%;
  max-width: 490px;
  margin: auto;
  transition: opacity 0.7s ease 0.15s;
}

.portada__esqueleto {
  position: fixed;
  top: 50%;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: var(--ancho);
  opacity: 0;
  transform: translate(-50%, -54%);
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.portada--cargando .portada__esqueleto {
  opacity: 1;
}

.portada__esqueleto-tarjeta,
.portada__esqueleto-linea {
  display: block;
  background: linear-gradient(100deg, rgba(255, 255, 255, 0.06) 30%, rgba(255, 255, 255, 0.17) 50%, rgba(255, 255, 255, 0.06) 70%) 100% 0 / 200% 100%;
  animation: esqueleto 1.6s linear infinite;
}

.portada__esqueleto-tarjeta {
  width: 100%;
  height: calc(var(--ancho) * 1.4);
  border: 1px solid rgba(211, 188, 132, 0.28);
  border-radius: 3px;
}

.portada__esqueleto-linea {
  width: 78%;
  height: 12px;
  border-radius: 8px;
}

.portada__esqueleto-linea--corta {
  width: 46%;
}

.portada--cargando .portada__contenido {
  opacity: 0;
}

.portada--cargando .sobre {
  pointer-events: none;
}

.portada__texto {
  transition: opacity 0.4s ease;
}

.portada__etiqueta {
  margin: 0 0 30px;
  color: #d9c79e;
  font: 500 var(--t-etiqueta) / 1.7 var(--fuente-texto);
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.portada__mensaje {
  margin: 34px auto 22px;
  color: #e6dfcf;
  font: italic 500 var(--t-serif) / 1.45 var(--fuente-serif);
}

.portada__pista {
  margin: 0;
  color: #d9c79e;
  font: 500 var(--t-etiqueta) / 1.7 var(--fuente-texto);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  animation: respirar 2.8s ease-in-out infinite;
}

@keyframes respirar {
  0%,
  100% {
    opacity: 0.45;
  }

  50% {
    opacity: 1;
  }
}

.portada__adorno {
  margin: 28px 0 0;
  color: #bba777;
  font-size: var(--t-pequeno);
  letter-spacing: 0.6em;
}



.sobre {
  position: relative;
  display: block;
  width: var(--ancho);
  height: calc(var(--ancho) * 1.4);
  margin: 28px auto 8px;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  color: inherit;
  cursor: pointer;
  perspective: 1100px;
  transform: rotate(var(--inclinacion));
  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.35)) drop-shadow(0 26px 26px rgba(0, 0, 0, 0.42));
  touch-action: manipulation;
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
}

.sobre__interior,
.sobre__cara,
.sobre__reverso {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

.sobre__interior {
  z-index: 1;
  border-radius: 2px;
  background:
    url("../assets/img/forro.svg"),
    linear-gradient(rgba(150, 130, 90, 0.07), rgba(150, 130, 90, 0.07)),
    url("../assets/img/papel.jpg"),
    #f1ede1;
  background-size: 170px 170px, auto, 256px 256px, auto;
  box-shadow:
    1px 1px 0 #ddd8c6,
    2px 2px 0 #d2ccb7,
    3px 3px 0 #c7c0a9,
    inset 0 0 18px rgba(80, 70, 40, 0.18);
}

.sobre__puerta {
  position: absolute;
  top: 0;
  z-index: 3;
  width: 50%;
  height: 100%;
  transform-style: preserve-3d;
}

.sobre__puerta--izquierda {
  left: 0;
  transform-origin: 0 50%;
}

.sobre__puerta--derecha {
  right: 0;
  transform-origin: 100% 50%;
}

.sobre__cara,
.sobre__reverso {
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.sobre__cara {
  background:
    linear-gradient(155deg, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0) 42%, rgba(110, 95, 60, 0.14) 100%),
    url("../assets/img/papel.jpg"),
    #f3f1e9;
  background-size: auto, 256px 256px, auto;
}


.sobre__puerta--izquierda .sobre__cara {
  border-radius: 2px 0 0 2px;
  background:
    linear-gradient(90deg, rgba(60, 50, 30, 0) 86%, rgba(60, 50, 30, 0.3) 100%),
    linear-gradient(155deg, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0) 42%, rgba(110, 95, 60, 0.14) 100%),
    url("../assets/img/papel.jpg"),
    #f3f1e9;
  background-size: auto, auto, 256px 256px, auto;
  box-shadow:
    inset -1px 0 0 rgba(55, 45, 25, 0.5),
    inset 1px 0 0 rgba(255, 255, 255, 0.85),
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    inset 0 -1px 0 rgba(120, 105, 70, 0.3);
}

.sobre__puerta--derecha .sobre__cara {
  border-radius: 0 2px 2px 0;
  background:
    linear-gradient(270deg, rgba(60, 50, 30, 0) 86%, rgba(60, 50, 30, 0.3) 100%),
    linear-gradient(155deg, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0) 42%, rgba(110, 95, 60, 0.18) 100%),
    url("../assets/img/papel.jpg"),
    #f1efe6;
  background-size: auto, auto, 256px 256px, auto;
  box-shadow:
    inset 1px 0 0 rgba(55, 45, 25, 0.5),
    inset -1px 0 0 rgba(255, 255, 255, 0.85),
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    inset 0 -1px 0 rgba(120, 105, 70, 0.3);
}


.sobre__reverso {
  opacity: 0;
  background:
    url("../assets/img/forro.svg"),
    radial-gradient(ellipse at 50% 40%, rgba(255, 255, 255, 0.2), rgba(90, 75, 45, 0.13)),
    url("../assets/img/papel.jpg"),
    #f1ede1;
  background-size: 170px 170px, auto, 256px 256px, auto;
  box-shadow: inset 0 0 14px rgba(80, 70, 40, 0.16);
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
}

.sobre__reverso-sombra,
.carta__sombra {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  opacity: 0;
  pointer-events: none;
}


.sobre__reverso-sombra {
  background: #2c2210;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
}


.carta__sombra {
  background: linear-gradient(90deg, rgba(40, 30, 10, 0.2) 0%, rgba(40, 30, 10, 0) 18%, rgba(40, 30, 10, 0) 82%, rgba(40, 30, 10, 0.2) 100%);
}



.sobre__banda {
  position: absolute;
  top: 37%;
  left: -2.5%;
  z-index: 5;
  width: 105%;
  height: 26%;
}

.sobre__cinta {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.18) 0%, rgba(0, 0, 0, 0) 5%, rgba(0, 0, 0, 0) 95%, rgba(0, 0, 0, 0.18) 100%),
    linear-gradient(90deg, rgba(0, 0, 0, 0) 49.2%, rgba(40, 55, 35, 0.24) 50%, rgba(255, 255, 255, 0.16) 50.7%, rgba(0, 0, 0, 0) 51.4%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.22) 0%, rgba(255, 255, 255, 0) 35%, rgba(40, 60, 35, 0.16) 100%),
    url("../assets/img/cinta.jpg"),
    #a3b79b;
  background-size: auto, auto, auto, 256px 256px, auto;
  box-shadow:
    0 5px 8px rgba(30, 40, 25, 0.38),
    0 1px 2px rgba(30, 40, 25, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.35),
    inset 0 -1px 0 rgba(40, 60, 35, 0.3);
}

.sobre__ramita {
  position: absolute;
  top: -6%;
  left: -17.5%;
  width: 73.5%;
  height: auto;
  pointer-events: none;
  filter: drop-shadow(0 3px 2px rgba(20, 35, 15, 0.42));
}

.sobre__sello {
  position: absolute;
  top: 50%;
  left: 54%;
  width: calc(var(--u) * 24);
  height: calc(var(--u) * 24);
  filter: drop-shadow(0 4px 3px rgba(55, 40, 15, 0.55));
  -webkit-transform: translate(-50%, -50%) rotate(-8deg);
  transform: translate(-50%, -50%) rotate(-8deg);
}

.sobre__sello-cuerpo {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  animation: latido 3.2s ease-in-out infinite;
}

.sobre__sello-imagen {
  display: block;
  width: 100%;
  height: 100%;
}


.sobre__sello-brillo {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(115deg, rgba(255, 248, 220, 0) 38%, rgba(255, 248, 220, 0.8) 50%, rgba(255, 248, 220, 0) 62%);
  background-size: 300% 100%;
  background-position: 120% 0;
  -webkit-mask: url("../assets/img/sello.png") center / 100% 100% no-repeat;
  mask: url("../assets/img/sello.png") center / 100% 100% no-repeat;
  animation: destello 5s ease-in-out infinite;
}

.sobre__grieta {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
}

@keyframes latido {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.045);
  }
}

@keyframes destello {
  0%,
  55% {
    background-position: 120% 0;
  }

  85%,
  100% {
    background-position: -20% 0;
  }
}



.carta {
  position: absolute;
  top: 4%;
  left: 6%;
  z-index: 2;
  overflow: hidden;
  width: 88%;
  height: 92%;
  border: 1px solid #d6c8a8;
  border-radius: 2px;
  background: var(--papel);
  box-shadow: 0 3px 10px rgba(29, 42, 32, 0.2);
}


.replica {
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
  isolation: isolate;
  transform-origin: 0 0;
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
}

.replica__pagina {
  position: relative;
}


.replica--zoom {
  position: fixed;
  z-index: 1100;
  will-change: transform, clip-path;
}



.portada--abriendo {
  pointer-events: none;
}

.portada--abriendo .portada__texto {
  opacity: 0;
}

.portada--abriendo .portada__pista,
.portada--abriendo .sobre__sello-cuerpo,
.portada--abriendo .sobre__sello-brillo {
  animation: none;
}

.sobre:focus-visible {
  outline: 2px solid #d9c79e;
  outline-offset: 10px;
}



@media (max-height: 520px) {
  .portada {
    --ancho: max(120px, calc((100vh - 150px) / 1.4));
  }

  .portada__etiqueta {
    margin-bottom: 8px;
  }

  .sobre {
    margin: 10px auto 12px;
  }

  .portada__mensaje {
    margin: 8px auto 10px;
    font-size: var(--t-base);
  }

    .portada__adorno {
    display: none;
  }
}



@media (min-width: 768px) and (min-height: 640px) {
  .portada {
    --ancho: max(220px, min(340px, calc((100vh - 360px) / 1.4)));
  }

  .portada__contenido {
    max-width: 560px;
  }

  .portada__mensaje {
    margin-top: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .portada__texto,
  .portada__contenido {
    transition: none;
  }

  .portada__pista,
  .portada__esqueleto-tarjeta,
  .portada__esqueleto-linea,
  .sobre__sello-cuerpo,
  .sobre__sello-brillo {
    animation: none;
  }
}