/* ══════════════════════════════════════════
   INVITACIÓN XV AÑOS – TEMA CENICIENTA
   sobre.css
   ══════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --blue-deep:    #0a1628;
  --blue-mid:     #0d2a4a;
  --blue-royal:   #1a4a7a;
  --blue-sky:     #4a9eda;
  --blue-light:   #a8d8f0;
  --blue-pale:    #dff0fb;
  --silver:       #c8dce8;
  --silver-light: #e8f4fc;
  --silver-shine: #ffffff;
  --cyan-glow:    #7dd4f0;
  --magic-blue:   #5bb8e8;
  --white-soft:   rgba(255, 255, 255, 0.88);
}

/* ── Reset & Base ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Montserrat', sans-serif;
  overflow: hidden;
  cursor: default;

  /* Fondo degradado nocturno tipo Cenicienta */
  background:
    radial-gradient(ellipse at 20% 20%, rgba(26, 74, 122, 0.6) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 80%, rgba(74, 158, 218, 0.25) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 0%,  rgba(93, 184, 232, 0.15) 0%, transparent 60%),
    linear-gradient(160deg, #060e1e 0%, #0a1628 40%, #0d2a4a 100%);
}

/* ── Canvas brillitos ── */
#glitter {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* ── Esquinas decorativas ── */
.corner {
  position: fixed;
  width: 90px;
  height: 90px;
  pointer-events: none;
  z-index: 5;
  opacity: 0.45;
  filter: drop-shadow(0 0 6px rgba(168, 216, 240, 0.6));
}
.corner svg { width: 100%; height: 100%; }
.corner.tl { top: 16px;    left: 16px; }
.corner.tr { top: 16px;    right: 16px;  transform: scaleX(-1); }
.corner.bl { bottom: 16px; left: 16px;   transform: scaleY(-1); }
.corner.br { bottom: 16px; right: 16px;  transform: scale(-1); }

/* ── Escena ── */
.scene {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

/* ── Texto superior ── */
.pre-text {
  text-align: center;
  opacity: 0;
  animation: fade-up 1.6s ease forwards 0.5s;
}

.pre-text span {
  display: block;
  font-family: 'Great Vibes', cursive;
  font-size: clamp(1.6rem, 5.5vw, 2.4rem);
  color: var(--blue-light);
  letter-spacing: 0.04em;
  text-shadow:
    0 0 20px rgba(125, 212, 240, 0.8),
    0 0 60px rgba(125, 212, 240, 0.3);
}

.pre-text small {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.6rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(168, 216, 240, 0.55);
}

/* ── Wrapper del sobre ── */
.envelope-wrap {
  position: relative;
  width: clamp(270px, 74vw, 430px);
  cursor: pointer;
  opacity: 0;
  animation: fade-up 1.4s ease forwards 1.1s;

  /* Perspectiva para el flip 3D de la tapa */
  perspective: 900px;

  filter: drop-shadow(0 24px 50px rgba(0, 0, 0, 0.7))
          drop-shadow(0 0 30px rgba(91, 184, 232, 0.2));

  transition: transform 0.2s ease;
}
.envelope-wrap:hover {
  transform: scale(1.018);
}
.envelope-wrap:hover .hint {
  opacity: 1;
}

/* ── Sobre (contenedor proporcional) ── */
.envelope {
  position: relative;
  width: 100%;
  aspect-ratio: 1.618 / 1;
}

/* ── Cuerpo del sobre ── */
.env-body {
  position: absolute;
  inset: 0;
  border-radius: 4px 4px 14px 14px;

  background:
    linear-gradient(160deg,
      #b8d8ee 0%,
      #7ab8d8 30%,
      #4a88b8 60%,
      #2a5888 100%
    );

  /* Brillo nacarado */
  box-shadow:
    inset 0 2px 8px rgba(255, 255, 255, 0.35),
    inset 0 -6px 20px rgba(0, 0, 30, 0.2);
}

/* Marco interior fino */
.env-body::after {
  content: '';
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 3px 3px 11px 11px;
  pointer-events: none;
}

/* ── Solapa superior (tapa) ── */
.env-flap {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 56%;
  transform-origin: top center;
  transform-style: preserve-3d;
  transition: transform 1s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 5;
}

/* Triángulo de la tapa */
.env-flap::before {
  content: '';
  position: absolute;
  top: 0; left: -4%; right: -4%;
  height: 100%;
  background: linear-gradient(175deg,
    #c8e8f8 0%,
    #8ac0e0 35%,
    #5090c0 70%,
    #2a6098 100%
  );
  clip-path: polygon(50% 100%, 0% 0%, 100% 0%);
  border-radius: 4px 4px 0 0;

  /* Brillo nacarado en la tapa */
  filter: drop-shadow(0 2px 6px rgba(200, 232, 248, 0.3));
}

/* ── Sello lacre ── */
.seal {
  position: absolute;
  top: 52%; left: 50%;
  transform: translate(-50%, -50%);
  width: 58px; height: 58px;
  border-radius: 50%;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: center;

  background: radial-gradient(circle at 35% 30%,
    #dff0fb,
    #7ab8e0 40%,
    #2a6098 75%,
    #0d2a4a
  );

  box-shadow:
    0 4px 18px rgba(0, 0, 0, 0.45),
    0 0 20px rgba(91, 184, 232, 0.5),
    inset 0 2px 5px rgba(255, 255, 255, 0.4);

  transition: transform 0.5s ease, opacity 0.5s ease;
}

/* Aro interior del sello */
.seal::before {
  content: '';
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

/* Estrellas decorativas del sello */
.seal::after {
  content: '✦';
  position: absolute;
  bottom: 6px; right: 5px;
  font-size: 0.45rem;
  color: rgba(255, 255, 255, 0.6);
}

.seal-letter {
  font-family: 'Great Vibes', cursive;
  font-size: 1.8rem;
  color: #fff;
  line-height: 1;
  text-shadow: 0 0 10px rgba(168, 216, 240, 0.9);
  position: relative;
  z-index: 1;
}

/* ── Tarjeta interior ── */
.card {
  position: absolute;
  left: 8%; right: 8%;
  bottom: 8%;
  height: 82%;
  z-index: 2;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 1.4rem;
  text-align: center;
  border-radius: 6px;

  background: linear-gradient(160deg,
    rgba(240, 252, 255, 0.97) 0%,
    rgba(215, 240, 255, 0.95) 100%
  );

  box-shadow:
    0 -6px 28px rgba(0, 0, 0, 0.18),
    inset 0 1px 3px rgba(255, 255, 255, 0.9);

  /* Posición inicial — sube al abrir */
  transform: translateY(0);
  transition: transform 1.1s cubic-bezier(0.4, 0, 0.2, 1) 0.25s;
}

/* Borde nacarado de la tarjeta */
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 6px;
  border: 1.5px solid rgba(91, 184, 232, 0.4);
  pointer-events: none;
}

/* Ornamentos superiores e inferiores de la tarjeta */
.card-ornament {
  width: 70px; height: 1px;
  position: relative;
}
.card-ornament::before,
.card-ornament::after {
  content: '✦';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.6rem;
  color: var(--blue-sky);
  opacity: 0.7;
}
.card-ornament::before {
  content: '─── ✦ ───';
  white-space: nowrap;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.5rem;
  color: rgba(74, 158, 218, 0.5);
  letter-spacing: 0.1em;
}
.card-ornament.bottom::before {
  content: '─── ✦ ───';
}

.card .monogram {
  font-family: 'Great Vibes', cursive;
  font-size: clamp(2.6rem, 9vw, 3.8rem);
  line-height: 1;
  color: var(--blue-royal);
  text-shadow:
    0 0 15px rgba(74, 158, 218, 0.4),
    0 2px 4px rgba(0, 0, 0, 0.1);
}

.card .subtitle {
  font-size: 0.52rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--blue-sky);
  font-weight: 300;
}

.card .divider {
  width: 55px; height: 1px;
  background: linear-gradient(90deg,
    transparent,
    var(--blue-sky),
    transparent
  );
  margin: 0.2rem 0;
}

.card .name {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1rem, 3.6vw, 1.45rem);
  font-weight: 300;
  letter-spacing: 0.06em;
  color: var(--blue-mid);
}

/* ── Hint de toque ── */
.hint {
  position: absolute;
  bottom: -2.6rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(168, 216, 240, 0.0);
  white-space: nowrap;
  animation: pulse-hint 2.2s ease-in-out infinite;
  transition: color 0.3s;
}
.envelope-wrap:hover .hint {
  color: rgba(168, 216, 240, 0.65);
}

/* ── Estado ABIERTO ── */
.envelope-wrap.open .env-flap {
  transform: rotateX(-175deg);
}

.envelope-wrap.open .seal {
  transform: translate(-50%, -50%) scale(0) rotate(30deg);
  opacity: 0;
}

.envelope-wrap.open .card {
  transform: translateY(-46%);
}

/* ── Botón CTA ── */
.cta-btn {
  display: none;
  padding: 0.8rem 2.8rem;
  border-radius: 50px;
  border: 1.5px solid rgba(168, 216, 240, 0.55);
  text-decoration: none;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--blue-light);

  background: linear-gradient(135deg,
    rgba(26, 74, 122, 0.7) 0%,
    rgba(13, 42, 74, 0.85) 100%
  );

  box-shadow:
    0 8px 28px rgba(0, 0, 0, 0.4),
    0 0 20px rgba(91, 184, 232, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);

  backdrop-filter: blur(8px);
  cursor: pointer;
  opacity: 0;
  animation: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s;
}

.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow:
    0 14px 36px rgba(0, 0, 0, 0.5),
    0 0 30px rgba(91, 184, 232, 0.4);
  border-color: rgba(168, 216, 240, 0.9);
}

.cta-btn.visible {
  display: inline-block;
  animation: fade-up 0.9s ease forwards;
}

/* ══ Animaciones ══ */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-hint {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 0.8; }
}

/* ── Responsive ── */
@media (max-width: 380px) {
  .seal { width: 46px; height: 46px; }
  .seal-letter { font-size: 1.4rem; }
  .corner { width: 65px; height: 65px; }
}