*,
*::before,
*::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; background: #0c1229; }

/* Sin "rebote" que deje ver el fondo al pasarse del borde. */
html { overscroll-behavior-y: none; -webkit-text-size-adjust: 100%; }

body {
  min-height: 100vh;
  overflow-x: hidden;
  overscroll-behavior-y: none;
  -webkit-font-smoothing: antialiased;
  font-family: 'Inter', system-ui, sans-serif;
}

body.is-locked { overflow: hidden; height: 100vh; }

/* ---------- Lienzo ---------- */

.stage-outer { margin: 0 auto; overflow: hidden; }

.stage {
  transform-origin: top left;
  display: flex;
  flex-direction: column;
}

.section {
  position: relative;
  width: 400px;
  flex-shrink: 0;
  overflow: hidden;
  margin-bottom: -1px;
  contain: layout paint;
}

.prim {
  position: absolute;
  transform-origin: center center;
}

.anim { width: 100%; height: 100%; }

.will-anim {
  opacity: 0;
  transform: translate(var(--ax), var(--ay)) rotate(var(--ar));
  /* Sin will-change permanente: decenas de capas fijas pesan más de lo que ayudan en celulares. */
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  backface-visibility: hidden;
}

.will-anim.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .will-anim { transition: opacity .3s linear; transform: none; }
}

/* ---------- Primitivas ---------- */

.p-image, .p-figure {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  user-select: none;
}

.p-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.p-image.is-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(160deg, #2a3561, #141b3a);
  color: #e6e2d3;
  font: 500 12px/1 'Inter', sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.p-figure { overflow: visible; isolation: isolate; }

.p-figure img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.p-figure__tint {
  position: absolute;
  inset: 0;
  mix-blend-mode: color;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
}

.p-text {
  width: 100%;
  height: 100%;
  white-space: pre-line;
  word-break: break-word;
}

.p-button {
  width: 100%;
  height: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 6px;
  text-decoration: none;
  letter-spacing: .08em;
  cursor: pointer;
  transition: transform .15s ease, filter .15s ease;
  -webkit-tap-highlight-color: transparent;
}

.p-button:hover { filter: brightness(1.06); }
.p-button:active { transform: scale(.97); }
.p-button:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; }

.p-music {
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(0, 0, 0, .3);
}

.p-music.is-playing { animation: pulse 2.2s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

.p-countdown {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  text-align: center;
}

.p-countdown__cell { display: flex; flex-direction: column; line-height: 1; gap: 4px; }
.p-countdown__num { font-family: 'Prata', serif; }
.p-countdown__label { opacity: .9; }

/* ---------- Sobre de apertura ---------- */

.envelope {
  position: fixed;
  inset: 0;
  z-index: 1000;
  cursor: pointer;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

.envelope__pocket,
.envelope__flap {
  position: absolute;
  left: 0;
  width: 100%;
  transition: transform 1.1s cubic-bezier(.7, 0, .3, 1);
}

.envelope__pocket {
  top: 0;
  height: 100%;
  background:
    linear-gradient(115deg, transparent 49.6%, rgba(0, 0, 0, .18) 50%, transparent 62%),
    linear-gradient(245deg, transparent 49.6%, rgba(0, 0, 0, .18) 50%, transparent 62%),
    var(--env);
  clip-path: polygon(0 0, 38% 44%, 62% 44%, 100% 0, 100% 100%, 0 100%);
}

/* La sombra va en el contenedor: un filter en el mismo nodo del clip-path se recorta. */
.envelope__flap {
  top: 0;
  height: 58%;
  filter: drop-shadow(0 10px 14px rgba(0, 0, 0, .45));
  z-index: 1;
}

.envelope__flap-shape {
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, var(--env) 60%, color-mix(in srgb, var(--env) 85%, #fff));
  clip-path: polygon(0 0, 100% 0, 100% 22%, 52% 98%, 48% 98%, 0 22%);
}

.envelope__seal {
  position: absolute;
  left: 50%;
  top: 56%;
  width: 96px;
  height: 96px;
  transform: translate(-50%, -50%);
  z-index: 2;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, .35));
  transition: opacity .4s ease, transform .6s ease;
}

.envelope__hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12%;
  margin: 0;
  text-align: center;
  font: 400 30px/1 'Pinyon Script', cursive;
  z-index: 2;
  animation: breathe 2.2s ease-in-out infinite;
  transition: opacity .3s ease;
}

@keyframes breathe {
  0%, 100% { opacity: .65; }
  50% { opacity: 1; }
}

.envelope.is-open .envelope__flap { transform: translateY(-105%); }
.envelope.is-open .envelope__pocket { transform: translateY(105%); }
.envelope.is-open .envelope__seal { opacity: 0; transform: translate(-50%, -50%) scale(1.3); }
.envelope.is-open .envelope__hint { opacity: 0; animation: none; }

/* ---------- Popup de confirmación ---------- */

.rsvp-dialog {
  width: min(92vw, 420px);
  max-height: 90vh;
  padding: 0;
  border: 0;
  border-radius: 14px;
  background: #f6f2e8;
  color: #1a1a1a;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
  overflow: auto;
  overscroll-behavior: contain;
}

.rsvp-dialog::backdrop {
  background: rgba(8, 12, 30, .7);
  backdrop-filter: blur(3px);
}

.rsvp-dialog[open] { animation: rsvp-in .35s cubic-bezier(.22, 1, .36, 1); }

@keyframes rsvp-in {
  from { opacity: 0; transform: translateY(24px) scale(.98); }
  to { opacity: 1; transform: none; }
}

.rsvp {
  position: relative;
  padding: 28px 22px 24px;
  font: 400 15px/1.4 'Prata', serif;
  outline: 1px solid #d9d1bd;
  outline-offset: -10px;
  border-radius: 14px;
}

.rsvp__close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: #1e3a6e;
  font: 400 28px/1 'Inter', sans-serif;
  cursor: pointer;
}

.rsvp__title {
  margin: 0 0 4px;
  text-align: center;
  color: #5e050f;
  font: 400 34px/1.1 'Pinyon Script', cursive;
}

.rsvp__lead { margin: 0 0 18px; text-align: center; font-size: 13px; color: #555; }

.rsvp__field { display: block; margin: 0 0 16px; padding: 0; border: 0; min-width: 0; }

.rsvp__field > span,
.rsvp__field > legend {
  display: block;
  margin-bottom: 6px;
  padding: 0;
  color: #1e3a6e;
  font-size: 14px;
}

.rsvp input[type="text"],
.rsvp input[type="number"],
.rsvp textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #cfc6b2;
  border-radius: 8px;
  background: #fff;
  color: #1a1a1a;
  font: 400 16px/1.3 'Inter', sans-serif; /* 16px: evita el zoom automático en iPhone */
}

.rsvp textarea { resize: vertical; }

.rsvp input:focus,
.rsvp textarea:focus { outline: 2px solid #1e3a6e; outline-offset: 1px; border-color: transparent; }

.rsvp__choices { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.rsvp__choice { position: relative; cursor: pointer; }

.rsvp__choice input { position: absolute; opacity: 0; pointer-events: none; }

.rsvp__choice span {
  display: block;
  padding: 11px 8px;
  border: 1px solid #1e3a6e;
  border-radius: 8px;
  text-align: center;
  color: #1e3a6e;
  transition: background .15s ease, color .15s ease;
}

.rsvp__choice input:checked + span { background: #1e3a6e; color: #f6f2e8; }
.rsvp__choice input:focus-visible + span { outline: 2px solid #c9a35a; outline-offset: 2px; }

.rsvp__stepper { display: grid; grid-template-columns: 44px 1fr 44px; gap: 8px; }

.rsvp__stepper button {
  border: 1px solid #1e3a6e;
  border-radius: 8px;
  background: transparent;
  color: #1e3a6e;
  font: 400 22px/1 'Inter', sans-serif;
  cursor: pointer;
}

.rsvp__stepper input { text-align: center; -moz-appearance: textfield; }
.rsvp__stepper input::-webkit-inner-spin-button,
.rsvp__stepper input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }

.rsvp__error {
  margin: 0 0 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #fbe9ea;
  color: #8a1020;
  font: 400 14px/1.3 'Inter', sans-serif;
}

.rsvp__submit {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  padding: 14px;
  border: 0;
  border-radius: 10px;
  background: #1e3a6e;
  color: #f6f2e8;
  font: 600 14px/1 'Cinzel', serif;
  letter-spacing: .1em;
  text-decoration: none;
  cursor: pointer;
}

.rsvp__submit:active { transform: scale(.98); }

.rsvp__link {
  display: block;
  margin: 14px auto 0;
  border: 0;
  background: none;
  color: #1e3a6e;
  font: 400 14px/1 'Prata', serif;
  text-decoration: underline;
  cursor: pointer;
}

.error {
  padding: 24px 16px;
  color: #fff;
  font: 14px/1.4 'Inter', sans-serif;
}