:root {
  --navy-0:#f8fbff;
  --navy-1:#eff6ff;
  --navy-2:#dcecff;
  --navy-3:#b8d2ee;
  --blue-0:#ffffff;
  --blue-1:#f3f8ff;
  --blue-2:#d7e8fb;
  --blue-3:#8fb5dc;
  --blue-4:#315f90;
  --blue-5:#123b68;
  --blue-6:#071b34;
  --silver-0:#f7f9fb;
  --silver-1:#e3e8ec;
  --silver-2:#7399bf;
  --silver-3:#496f99;
  --text:#123b68;
  --muted:#315f90;
  --serif:"Cormorant Garamond", Georgia, serif;
  --display:"Italiana","Times New Roman",serif;
  --sans:"Montserrat",Arial,sans-serif;
  --vh:1vh;
}

* { box-sizing:border-box; margin:0; padding:0; }
html {
  scroll-behavior:smooth;
  scroll-snap-type:y proximity;
  background-color:#fff;
  background-image:url("resources/texture.webp");
  background-repeat:repeat;
  background-size:420px auto;
  background-position:center top;
}
body {
  overflow-x:hidden;
  color:var(--text);
  font-family:var(--sans);
  background:transparent;
}
body.locked { height:calc(var(--vh,1vh) * 100); overflow:hidden; }

.section {
  min-height:calc(var(--vh,1vh) * 100);
  height:calc(var(--vh,1vh) * 100);
  position:relative;
  display:grid;
  place-items:center;
  padding:112px 42px;
  overflow:hidden;
  scroll-snap-align:start;
  isolation:isolate;
}
.section::before {
  content:"";
  position:absolute;
  inset:0;
  z-index:-2;
  opacity:.24;
  pointer-events:none;
  background-image:
    radial-gradient(circle at 12% 20%,rgba(49,95,144,.38) 0 1px,transparent 1.4px),
    radial-gradient(circle at 70% 13%,rgba(116,158,201,.34) 0 1px,transparent 1.4px),
    radial-gradient(circle at 42% 67%,rgba(49,95,144,.28) 0 .8px,transparent 1.2px),
    radial-gradient(circle at 86% 76%,rgba(143,181,220,.36) 0 1px,transparent 1.4px),
    radial-gradient(circle at 25% 88%,rgba(49,95,144,.24) 0 .8px,transparent 1.3px);
  background-size:101px 113px,137px 129px,91px 103px,151px 143px,119px 125px;
}
.section::after {
  content:"";
  position:absolute;
  z-index:1;
  inset:0;
  width:auto;
  height:auto;
  background:url("resources/card-frame.png") center/100% 100% no-repeat;
  pointer-events:none;
}
.content {
  width:min(100%,520px);
  padding-inline:clamp(18px,4vw,42px);
  position:relative;
  z-index:2;
  text-align:center;
  opacity:0;
  transform:translate3d(0,24px,0);
  transition:opacity .65s ease, transform .65s cubic-bezier(.2,.7,.2,1);
}
.section.show .content {
  opacity:1;
  transform:translate3d(0,0,0);
}

.eyebrow {
  margin-bottom:16px;
  color:var(--silver-2);
  font-size:.73rem;
  letter-spacing:.26em;
  text-transform:uppercase;
}
.title {
  font:400 clamp(2.3rem,8vw,5rem)/1 var(--display);
}
.orn {
  margin:24px auto;
  color:var(--blue-4);
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
}
.orn::before,.orn::after {
  content:"";
  width:60px;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--blue-4));
}
.orn::after { transform:scaleX(-1); }

.card {
  width:min(100%,500px);
  margin:28px auto 0;
  padding:clamp(28px,7vw,52px);
  border:1px solid rgba(49,95,144,.24);
  border-radius:26px;
  color:var(--blue-5);
  background:
    linear-gradient(145deg,rgba(255,255,255,.96),rgba(232,243,255,.94));
  box-shadow:0 24px 55px rgba(49,95,144,.12), inset 0 1px 0 rgba(255,255,255,.82);
}

.date-block {
  margin:28px auto 0;
  color:var(--blue-5);
}

.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:52px;
  margin-top:28px;
  padding:0 24px;
  border:1px solid rgba(49,95,144,.32);
  border-radius:999px;
  background:rgba(255,255,255,.72);
  color:var(--blue-5);
  font:600 .76rem var(--sans);
  letter-spacing:.11em;
  text-transform:uppercase;
  cursor:pointer;
  transition:transform .2s ease, background .2s ease, border-color .2s ease;
  text-decoration: none;
}
.btn:hover {
  transform:translate3d(0,-2px,0);
  background:rgba(215,232,251,.86);
  border-color:rgba(49,95,144,.52);
}
.btn svg { width:18px; height:18px; }

/* =========================================================
   INTRO SOBRE INTERACTIVO
   ========================================================= */
.section.intro {
  min-height:calc(var(--vh,1vh) * 100);
  height:calc(var(--vh,1vh) * 100);
  padding:0 20px;
  background:transparent;
}
.section.intro::after {
  content:none;
}

.intro-stage {
  position:relative;
  z-index:2;
  width:min(92vw,500px);
  min-height:calc(var(--vh,1vh) * 100);
  height:calc(var(--vh,1vh) * 100);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding-bottom:54px;
}

.ambient-halo {
  position:absolute;
  left:50%;
  top:46%;
  width:min(74vw,380px);
  aspect-ratio:1;
  border-radius:50%;
  border:1px solid rgba(49,95,144,.12);
  transform:translate3d(-50%,-50%,0);
  animation:ambientHalo 6s ease-in-out infinite alternate;
}
.ambient-halo::before,
.ambient-halo::after {
  content:"";
  position:absolute;
  border-radius:50%;
  inset:10%;
  border:1px solid rgba(49,95,144,.10);
  transform:rotate(26deg) scaleY(.78);
}
.ambient-halo::after {
  inset:24%;
  transform:rotate(-26deg) scaleY(.68);
}
@keyframes ambientHalo {
  from { opacity:.45; transform:translate3d(-50%,-50%,0) scale(.98); }
  to { opacity:.78; transform:translate3d(-50%,-50%,0) scale(1.03); }
}

.butterfly {
  position:absolute;
  width:16px;
  height:16px;
  background:url("resources/butterfly.svg") center/contain no-repeat;
  opacity:0;
  animation:butterflyParticle 4.4s ease-in-out infinite;
}
.butterfly:nth-child(2){left:10%;top:20%;animation-delay:.25s;--butterfly-size:13px;--butterfly-rotate:-18deg;--butterfly-drift-x:12px;--butterfly-drift-y:-18px}
.butterfly:nth-child(3){left:84%;top:21%;animation-delay:1.1s;--butterfly-size:17px;--butterfly-rotate:16deg;--butterfly-drift-x:-16px;--butterfly-drift-y:-14px}
.butterfly:nth-child(4){left:18%;top:72%;animation-delay:2s;--butterfly-size:12px;--butterfly-rotate:11deg;--butterfly-drift-x:14px;--butterfly-drift-y:16px}
.butterfly:nth-child(5){left:78%;top:69%;animation-delay:.7s;--butterfly-size:15px;--butterfly-rotate:-14deg;--butterfly-drift-x:-16px;--butterfly-drift-y:18px}
.butterfly:nth-child(6){left:52%;top:10%;animation-delay:1.7s;--butterfly-size:11px;--butterfly-rotate:8deg;--butterfly-drift-x:10px;--butterfly-drift-y:-16px}
.butterfly:nth-child(7){left:90%;top:49%;animation-delay:2.4s;--butterfly-size:14px;--butterfly-rotate:-10deg;--butterfly-drift-x:-20px;--butterfly-drift-y:10px}
.butterfly:nth-child(8){left:8%;top:47%;animation-delay:2.8s;--butterfly-size:16px;--butterfly-rotate:14deg;--butterfly-drift-x:18px;--butterfly-drift-y:12px}
.butterfly:nth-child(9){left:63%;top:84%;animation-delay:1.35s;--butterfly-size:12px;--butterfly-rotate:-8deg;--butterfly-drift-x:-12px;--butterfly-drift-y:14px}
.butterfly:nth-child(10){left:30%;top:88%;animation-delay:1.9s;--butterfly-size:13px;--butterfly-rotate:18deg;--butterfly-drift-x:10px;--butterfly-drift-y:20px}
.butterfly:nth-child(11){left:68%;top:90%;animation-delay:2.8s;--butterfly-size:12px;--butterfly-rotate:-16deg;--butterfly-drift-x:-12px;--butterfly-drift-y:18px}
.butterfly:nth-child(12){left:46%;top:25%;animation-delay:3.2s;--butterfly-size:11px;--butterfly-rotate:10deg;--butterfly-drift-x:-8px;--butterfly-drift-y:-16px}
@keyframes butterflyParticle {
  0%,100% {
    width:var(--butterfly-size,14px);
    height:var(--butterfly-size,14px);
    opacity:0;
    transform:translate3d(0,0,0) rotate(var(--butterfly-rotate,0deg)) scale(.5);
  }
  18%,72% {
    opacity:.85;
  }
  50% {
    transform:translate3d(var(--butterfly-drift-x,12px),var(--butterfly-drift-y,-14px),0) rotate(0deg) scale(1.25);
  }
}

.envelope-trigger {
  --envelope-scale:.86;
  appearance:none;
  border:0;
  background:transparent;
  padding:0;
  cursor:pointer;
  position:relative;
  width:340px;
  height:270px;
  display:grid;
  place-items:center;
  filter:drop-shadow(0 24px 30px rgba(18,59,104,.22));
  transform:scale(var(--envelope-scale));
  transition:transform .25s ease;
}
.envelope-trigger:hover { transform:translate3d(0,-2px,0) scale(var(--envelope-scale)); }
.envelope-trigger:focus-visible {
  outline:2px solid rgba(49,95,144,.72);
  outline-offset:8px;
  border-radius:16px;
}

.envelope {
  position:relative;
  width:340px;
  height:230px;
  perspective:1100px;
  clip-path:inset(-260px -80px 0 -80px);
}

.letter {
  position:absolute;
  left:20px;
  right:20px;
  top:-40px;
  height:400px;
  padding:34px 22px 26px;
  border-radius:10px;
  background:
    linear-gradient(145deg,#ffffff 0%,#f2f8ff 48%,#dcecff 100%);
  color:var(--blue-5);
  text-align:center;
  box-shadow:0 12px 22px rgba(18,59,104,.16), inset 0 1px 0 rgba(255,255,255,.86);
  transform:translate3d(0,-106px,0);
  opacity:0;
  will-change:transform,opacity;
  z-index:3;
}
.letter-kicker {
  color:var(--blue-4);
  font:600 .72rem var(--sans);
  letter-spacing:.34em;
  text-transform:uppercase;
}
.letter-name {
  margin-top:8px;
  font:400 clamp(2.8rem,9vw,4rem)/1 var(--display);
  letter-spacing:.03em;
}
.letter-phrase {
  margin-top:16px;
  color:var(--blue-5);
  font:500 clamp(1.08rem,3.8vw,1.3rem)/1.45 var(--serif);
}
.letter-date {
  margin-top:18px;
  color:var(--blue-4);
  font:600 .7rem var(--sans);
  letter-spacing:.16em;
  text-transform:uppercase;
}
.letter-divider {
  width:72px;
  height:1px;
  margin:16px auto 0;
  background:linear-gradient(90deg,transparent,var(--blue-4),transparent);
}

.envelope-back {
  position:absolute;
  inset:0;
  border-radius:10px;
  background:linear-gradient(135deg,#123b68,#071b34);
  overflow:hidden;
  z-index:2;
}
.envelope-back::after {
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg,rgba(255,255,255,.16),transparent 35%),
    radial-gradient(circle at 18% 20%,rgba(143,181,220,.20),transparent 18%);
}

.envelope-front {
  position:absolute;
  inset:0;
  z-index:4;
  border-radius:10px;
  overflow:hidden;
}
.envelope-front::before,
.envelope-front::after {
  content:"";
  position:absolute;
  inset:0;
}
.envelope-front::before {
  background:linear-gradient(145deg,#164a7d,#071b34);
  clip-path:polygon(0 0, 50% 63%, 0 100%);
}
.envelope-front::after {
  background:linear-gradient(215deg,#1b568c,#09213f);
  clip-path:polygon(100% 0, 50% 63%, 100% 100%);
}

.envelope-bottom {
  position:absolute;
  inset:0;
  z-index:5;
  background:linear-gradient(180deg,#164a7d,#071b34);
  clip-path:polygon(0 100%, 50% 49%, 100% 100%);
  border-radius: 8px;
}

.envelope-flap {
  position:absolute;
  inset:0;
  z-index:6;
  transform-origin:top center;
  transform-style:preserve-3d;
  backface-visibility:hidden;
  background:linear-gradient(180deg,#1f5f99,#071b34);
  clip-path:polygon(0 0, 100% 0, 50% 66%);
  will-change:transform;
  border-radius: 7px;
}

.seal {
  position:absolute;
  left:50%;
  top:50%;
  transform:translate3d(-50%,-50%,0);
  z-index:7;
  width:82px;
  height:77px;
  background:url("resources/sealing-wax.webp") center/contain no-repeat;
  will-change:transform,opacity;
}
.envelope-mask {
  position:relative;
  z-index:9;
  width:min(48vw,190px);
  height:auto;
  pointer-events:none;
  transform:rotate(-4deg);
  transform-origin:58% 48%;
  filter:drop-shadow(0 10px 14px rgba(7,27,52,.20));
  transition:opacity .38s ease, transform .38s ease;
}

.tap-label {
  position:absolute;
  left:50%;
  bottom:18px;
  transform:translate3d(-50%,0,0);
  color:#fff;
  font:500 .78rem var(--sans);
  letter-spacing:.24em;
  text-transform:uppercase;
  opacity:.9;
  text-shadow:0 2px 8px rgba(7,27,52,.32);
  transition:opacity .25s ease;
}
.tap-label::after {
  content:"";
  display:block;
  width:78px;
  height:1px;
  margin:10px auto 0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.68),transparent);
}

.tap-hint {
  position:absolute;
  left:50%;
  top:50%;
  width:84px;
  height:84px;
  transform:translate3d(-50%,-50%,0);
  border-radius:50%;
  border:1px solid rgba(255,255,255,.14);
  opacity:0;
  pointer-events:none;
}
.intro:not(.opened) .tap-hint {
  animation:tapPulse 2.1s 1s ease-out infinite;
}
@keyframes tapPulse {
  0% { opacity:0; transform:translate3d(-50%,-50%,0) scale(.62); }
  20% { opacity:.42; }
  100% { opacity:0; transform:translate3d(-50%,-50%,0) scale(1.18); }
}

.opened .seal {
  animation:sealAway .45s ease forwards;
}
.section.intro.opened .envelope-mask {
  opacity:1;
  transform:translate3d(0,-150px,0) rotate(-4deg) scale(.92);
}
@keyframes sealAway {
  to { opacity:0; transform:translate3d(-50%,-50%,0) scale(.72); }
}

.opened .envelope-flap {
  animation:flapOpen .96s cubic-bezier(.18,.8,.22,1) .06s forwards;
}
@keyframes flapOpen {
  0% { transform:rotateX(0deg); z-index:6; }
  99% { z-index:6; }
  100% { transform:rotateX(182deg); z-index:0; }
}

.opened .letter {
  animation:letterRise 1.45s cubic-bezier(.16,.85,.24,1) .58s forwards;
}
@keyframes letterRise {
  0% { opacity:0; transform:translate3d(0,-106px,0); }
  18% { opacity:1; transform:translate3d(0,-126px,0); }
  72% { opacity:1; transform:translate3d(0,-142px,0); }
  100% { opacity:1; transform:translate3d(0,-132px,0); }
}

.opened .tap-label {
  opacity:0;
}

.opened .envelope-trigger {
  cursor:default;
}

.arrow {
  position:absolute;
  left:50%;
  bottom:max(20px,env(safe-area-inset-bottom));
  z-index:20;
  width:54px;
  height:54px;
  display:grid;
  place-items:center;
  border:1px solid rgba(49,95,144,.38);
  border-radius:50%;
  background:rgba(255,255,255,.84);
  color:var(--blue-5);
  opacity:0;
  pointer-events:none;
  transform:translate3d(-50%,12px,0);
  transition:opacity .55s ease, transform .55s ease;
  cursor:pointer;
}
.ready .arrow {
  opacity:1;
  pointer-events:auto;
  transform:translate3d(-50%,0,0);
}
.arrow svg {
  width:25px;
  height:25px;
  animation:arrowFloat 1.65s ease-in-out infinite;
}
@keyframes arrowFloat {
  0%,100% { transform:translate3d(0,-2px,0); }
  50% { transform:translate3d(0,5px,0); }
}

/* SECCIONES */
.bigdate {
  font:400 clamp(4.5rem,20vw,8rem)/.9 var(--display);
  color:var(--blue-5);
}
.month {
  margin-top:10px;
  font:400 clamp(2rem,7vw,3rem) var(--serif);
  text-transform:uppercase;
  letter-spacing:.12em;
}
.year {
  margin-top:5px;
  color:var(--blue-4);
  font-size:.8rem;
  letter-spacing:.28em;
}
.time {
  margin-top:24px;
  font:400 1.45rem var(--serif);
}
.address,.copy {
  max-width:540px;
  margin:20px auto 0;
  padding-inline:clamp(18px,4vw,32px);
  color:var(--muted);
  font:400 clamp(1.15rem,4vw,1.5rem)/1.5 var(--serif);
}
.deadline {
  display:inline-block;
  margin-top:22px;
  padding:10px 16px;
  color:var(--blue-4);
  font-size:.76rem;
}
.dress {
  margin-top:25px;
  font:400 clamp(3.2rem,13vw,6rem)/1 var(--display);
  color:var(--blue-5);
}
.mask {
  width:min(54vw,230px);
  margin:1px auto 0;
  opacity:.9;
  filter:drop-shadow(0 14px 22px rgba(0,0,0,.22));
}
.finalname {
  font:400 clamp(4rem,18vw,8rem)/.95 var(--display);
}
.finalxv {
  margin-top:10px;
  color:var(--blue-4);
  font:400 1.15rem var(--serif);
  letter-spacing:.34em;
  text-transform:uppercase;
}
.footer {
  margin-top:40px;
  color:rgba(18,59,104,.48);
  font-size:.65rem;
  letter-spacing:.1em;
  text-transform:uppercase;
}

.music-player {
  position: relative;
  z-index: 8;
  width: 68px;
  height: 68px;
  margin-top: -34px;
  display: grid;
  place-items: center;
  opacity: 0;
  transform: translate3d(0, 18px, 0) scale(.98);
  pointer-events: none;
  transition:
    opacity .55s ease 1.05s,
    transform .55s cubic-bezier(.2,.8,.2,1) 1.05s;
}

.section.intro.opened .music-player {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
  pointer-events: auto;
}

.music-toggle {
  position: static;
  width: 68px;
  height: 68px;
  border: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 24%, rgba(255,255,255,.55), transparent 27%),
    linear-gradient(135deg, #d7e8fb, #315f90 58%, #071b34);
  color: #ffffff;
  display: grid;
  place-items: center;
  box-shadow: 0 18px 36px rgba(18, 59, 104, .28);
  cursor: pointer;
  flex-shrink: 0;
  transition: transform .18s ease, box-shadow .18s ease;
}
.music-toggle:hover {
  transform: scale(1.04);
  box-shadow: 0 20px 40px rgba(18, 59, 104, .34);
}
.music-note {
  font: 700 1.75rem/1 var(--serif);
  transform: translateY(-1px);
}
.music-pause {
  display: none;
  place-items: center;
}
.music-pause svg {
  width: 24px;
  height: 24px;
}
.music-toggle.is-playing .music-note {
  display: none;
}
.music-toggle.is-playing .music-pause {
  display: grid;
}

.arrow {
  position: absolute;
  left: 50%;
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 20;
  width: 42px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--blue-5);
  opacity: 0;
  pointer-events: none;
  transform: translate3d(-50%, 10px, 0);
  transition: opacity .55s ease, transform .55s ease;
  cursor: pointer;
}
.ready .arrow {
  opacity: 1;
  pointer-events: auto;
  transform: translate3d(-50%, 0, 0);
}
.arrow .chevrons {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  line-height: 0;
}
.arrow .chevrons svg {
  width: 16px;
  height: 16px;
  animation: none;
}
.arrow .chevrons svg:first-child { transform: translateY(2px); }
.arrow .chevrons svg:last-child { transform: translateY(-2px); }

.gift-section {
  position: relative;
  z-index: 2;
  width: min(92vw, 560px);
  margin: 44px auto 0;
  padding: 0 0 60px;
}
.gift-card {
  padding: 28px 22px;
  border: 1px solid rgba(49,95,144,.18);
  border-radius: 24px;
  background: rgba(255,255,255,.8);
  box-shadow: 0 16px 42px rgba(49,95,144,.08);
  text-align: center;
}
.gift-kicker {
  color: var(--blue-4);
  font: 600 .72rem var(--sans);
  letter-spacing: .22em;
  text-transform: uppercase;
}
.gift-card h3 {
  margin-top: 12px;
  font: 400 clamp(2rem, 6vw, 3rem)/1 var(--display);
  color: var(--blue-5);
}
.gift-card p {
  margin-top: 12px;
  color: var(--muted);
  font: 400 clamp(1rem, 2.5vw, 1.2rem)/1.6 var(--serif);
}

.alias-box {
  margin-top: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: center;
}
.alias-box span {
  color: var(--blue-5);
  font: 700 clamp(1.05rem, 4vw, 1.22rem) var(--sans);
  letter-spacing: 0.06em;
  overflow-wrap: anywhere;
}
.alias-copy {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--blue-5);
  cursor: pointer;
  transition: transform .18s ease, color .18s ease;
}
.alias-copy:hover {
  transform: translateY(-1px);
  color: var(--blue-4);
}
.alias-copy svg {
  width: 19px;
  height: 19px;
  display: block;
  color: currentColor;
}
.alias-copy.copied {
  color: #1e7d5b;
}

@media (max-height:700px) {
  .intro-stage {
    gap:4px;
    padding-bottom:42px;
    transform:scale(.90);
  }
}
@media (max-width:640px) {
  .section {
    padding:104px 44px;
  }
  .section::after {
    inset:0;
  }
  .content {
    width:min(100%,430px);
  }
  .bigdate {
    font-size:clamp(4rem,18vw,6rem);
  }
  .envelope-mask {
    width:min(56vw,170px);
  }
  .section.intro.opened .envelope-mask {
    transform:translate3d(0,-132px,0) rotate(-4deg) scale(.9);
  }
  .music-toggle {
    width: 62px;
    height: 62px;
  }
  .music-player {
    width: 62px;
    height: 62px;
    margin-top: -32px;
  }
  .music-note {
    font-size: 1.55rem;
  }
}
@media (prefers-reduced-motion:reduce) {
  html { scroll-behavior:auto; }
  *,*::before,*::after {
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
}