:root {
  color-scheme: dark;
  --ink: #0d0d0f; --paper: #faf4e8; --muted: #d5c9b2; --line: #cba8663b;
  --gold: #cba866; --champagne: #e6d6b9; --accent: #edd599;
  --sans: "DM Sans", Arial, sans-serif;
  --serif: "Cinzel", Georgia, serif;
  --condensed: "Barlow Condensed", "Arial Narrow", sans-serif;
  --script: "Great Vibes", "Segoe Script", cursive;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { margin: 0; background: var(--ink); color: var(--paper); font: 16px/1.6 var(--sans); }
body.intro-active { overflow: hidden; }
button, a, input, select { font: inherit; }
a { color: inherit; }
button { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.skip-link { position: fixed; z-index: 30; top: -5rem; left: 1rem; padding: .8rem 1rem; background: var(--accent); color: #17140d; }
.skip-link:focus { top: 1rem; }
.eyebrow { font: 600 .72rem var(--condensed); letter-spacing: .21em; text-transform: uppercase; color: var(--gold); }
.section { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.display { text-transform: uppercase; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .65rem; min-height: 44px; padding: .85rem 1.1rem; border: 1px solid var(--gold); border-radius: 5px; text-decoration: none; text-transform: uppercase; font: 700 .77rem var(--condensed); letter-spacing: .11em; cursor: pointer; transition: background .2s, color .2s; }
.button--outline { background: #151410d9; color: var(--paper); border-color: #d5bc7f85; }
.button--solid { background: var(--accent); border-color: var(--accent); color: #211b10; }
.button:hover { background: #f4dfaf; border-color: #f4dfaf; color: #211b10; }
.text-link { display: inline-block; color: var(--accent); font: 600 .75rem var(--condensed); letter-spacing: .1em; text-transform: uppercase; text-decoration: none; }

/* La escenografía es independiente de las letras y los controles. */
.christmas-scene { position: fixed; z-index: 0; inset: 0; overflow: hidden; pointer-events: none; background: radial-gradient(ellipse 75% 55% at 50% 13%, #35302538, transparent 78%); }
.christmas-scene::before { content: ""; position: absolute; inset: 0; opacity: .075; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.62' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Cpath fill='%23ffffff' filter='url(%23n)' d='M0 0h220v220H0z'/%3E%3C/svg%3E"); }
.christmas-scene__branches { position: absolute; z-index: 2; top: -5px; left: 50%; width: min(100vw, 1080px); height: auto; transform: translateX(-50%); }
.christmas-scene .ornament-layer { z-index: 1; left: 50%; right: auto; width: min(100vw, 940px); transform: translateX(-50%); }
.snow-layer { z-index: 0; }
main { position: relative; z-index: 1; }
body.intro-active main, body.intro-active .float-menu { visibility: hidden; }

/* Portada editorial: el título caligráfico conserva el espacio de las esferas. */
.hero { min-height: 100svh; padding: 0; }
.hero__eyebrow { position: absolute; top: 30%; left: 50%; transform: translateX(-50%); width: 88%; margin: 0; font: 600 .7rem var(--condensed); letter-spacing: .24em; text-transform: uppercase; color: var(--champagne); }
.hero__title { position: absolute; top: 35%; left: 50%; transform: translateX(-50%); width: min(92%, 42rem); margin: 0; color: var(--paper); }
.hero__title-first { display: block; font: 500 clamp(2.5rem, 9vw, 4.4rem)/1.05 var(--serif); text-transform: uppercase; letter-spacing: .035em; }
.hero__title-script { display: block; margin-top: .01em; color: var(--gold); font: 400 clamp(5.2rem, 22vw, 9rem)/1.2 var(--script); text-transform: none; letter-spacing: 0; }
.hero__tagline { position: absolute; top: 61%; left: 50%; transform: translateX(-50%); width: min(82%, 24rem); margin: 0; font-size: .78rem; line-height: 1.8; color: var(--champagne); }
.hero__event-date { position: absolute; bottom: 18.5%; left: 50%; transform: translateX(-50%); width: 92%; font: 500 clamp(1.7rem, 7vw, 2.65rem)/1.2 var(--serif); color: var(--paper); }
.hero__event-date p { margin: 0; }
.hero__event-date p + p { margin-top: .6rem; font: 600 .88rem var(--condensed); letter-spacing: .18em; color: var(--accent); }
.hero__actions { position: absolute; left: 50%; bottom: 7.2%; transform: translateX(-50%); display: flex; justify-content: center; gap: .6rem; width: min(92%, 29rem); }
.hero__actions .button { padding: .85rem 1rem; font-size: .72rem; }
.hero__scroll { position: absolute; bottom: 1.2%; left: 50%; transform: translateX(-50%); padding: .4rem 1rem; color: var(--gold); text-decoration: none; }
.hero__flake { position: absolute; width: clamp(30px, 9vw, 56px); height: auto; fill: none; stroke: var(--gold); stroke-width: 1.3; opacity: .55; }
.hero__flake--left { top: 39%; left: max(3.5%, calc(50% - 290px)); transform: rotate(-10deg); }
.hero__flake--right { top: 48%; right: max(3%, calc(50% - 290px)); transform: rotate(15deg); }

/* Un sobre oscuro con sello dorado abre la celebración. */
.intro { position: fixed; z-index: 20; inset: 0; display: grid; place-items: center; overflow: hidden; background: radial-gradient(ellipse at 50% 28%, #302b21, #0d0d0f 72%); transition: opacity .65s, visibility .65s; }
.intro.is-gone { opacity: 0; visibility: hidden; pointer-events: none; }
.intro__pine { position: absolute; top: -5px; left: 50%; transform: translateX(-50%); width: min(100vw, 1080px); height: auto; pointer-events: none; }
.envelope-stage { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; width: min(90%, 32rem); text-align: center; }
.envelope-stage > .eyebrow { margin: 0 0 1rem; }
.envelope-stage h2 { margin: 0 0 2rem; color: var(--accent); font: 400 clamp(3.8rem, 15vw, 5.8rem)/1 var(--script); }
.envelope { position: relative; display: block; width: min(82vw, 370px); height: min(54vw, 230px); min-height: 185px; padding: 0; border: 0; background: none; cursor: pointer; isolation: isolate; }
.envelope::before { content: ""; position: absolute; inset: 0; background: #242018; border: 1px solid #c7aa6370; }
.envelope__letter { position: absolute; z-index: 2; top: 9%; left: 8%; right: 8%; height: 77%; display: grid; place-content: center; gap: .4rem; background: #f4ead5; color: #3b301b; transition: top .85s cubic-bezier(.2,.75,.25,1) .8s; }
.envelope__letter small { font: 500 .75rem var(--serif); letter-spacing: .1em; }
.envelope__letter strong { font: 400 2.5rem var(--script); }
.envelope__pocket { position: absolute; z-index: 3; inset: 0; background: linear-gradient(145deg, #3a3429, #161513 62%, #3a3327); clip-path: polygon(0 0, 50% 52%, 100% 0, 100% 100%, 0 100%); border: 1px solid #c7aa6370; }
.envelope__flap { position: absolute; z-index: 4; inset: 0; background: linear-gradient(160deg, #544838, #242018 72%); clip-path: polygon(0 0, 100% 0, 50% 58%); transform-origin: 50% 0; backface-visibility: hidden; transform: perspective(1000px) rotateX(0deg); transition: transform .75s cubic-bezier(.2,.7,.25,1); }
.envelope__seal { position: absolute; z-index: 5; top: 42%; left: 50%; transform: translate(-50%, -50%); display: grid; place-items: center; width: 3rem; aspect-ratio: 1; border-radius: 50%; border: 1px solid #e9d096; background: radial-gradient(circle at 35% 28%, #f7e4b4, #c19a50 65%, #967039); color: #58421f; font-size: 1.3rem; transition: opacity .25s, transform .25s; }
.envelope-stage__hint { margin: 1.4rem 0 .6rem; font: 600 .73rem var(--condensed); letter-spacing: .19em; color: var(--champagne); }
.intro__skip { min-height: 44px; padding: .6rem 1rem; border: 1px solid #b99b584f; border-radius: 5px; background: #15130fd9; color: var(--champagne); font: 600 .72rem var(--condensed); letter-spacing: .12em; text-transform: uppercase; cursor: pointer; }
.intro.is-opening .envelope__flap { transform: perspective(1000px) rotateX(180deg); }
.intro.is-opening .envelope__letter { top: -56.45%; }
.envelope-stage > .eyebrow, .envelope-stage h2, .envelope-stage__hint { transition: opacity .2s; }
.intro.is-opening .envelope-stage > .eyebrow, .intro.is-opening .envelope-stage h2, .intro.is-opening .envelope-stage__hint { opacity: 0; }
.intro.is-opening .envelope__seal { opacity: 0; transform: translate(-50%, -50%) scale(.65); }

/* Menú flotante y selección de apartados estándar. */
.float-menu { position: fixed; z-index: 15; left: max(.75rem, env(safe-area-inset-left)); top: 1rem; }
.float-menu__toggle { display: flex; align-items: center; gap: .6rem; min-height: 44px; padding: .7rem 1rem; border: 1px solid #cfb27380; border-radius: 999px; background: #121210ed; color: var(--paper); cursor: pointer; font: 600 .75rem var(--condensed); letter-spacing: .15em; text-transform: uppercase; }
.menu-icon { display: grid; gap: 5px; width: 16px; }
.menu-icon i { height: 1px; background: var(--accent); }
.menu-chevron { font-size: 1rem; line-height: 1; transition: transform .2s; }
.float-menu__toggle[aria-expanded=true] .menu-chevron { transform: rotate(180deg); }
.float-menu__panel { position: absolute; top: calc(100% + .6rem); left: 0; width: min(18.5rem, calc(100vw - 1.5rem)); max-height: min(80svh, 42rem); overflow: auto; padding: 1.1rem; border: 1px solid var(--line); border-radius: 14px; background: #111110fa; }
.float-menu__heading { display: flex; justify-content: space-between; margin: 0 0 .8rem; padding-bottom: .8rem; border-bottom: 1px solid var(--line); font: 600 .9rem var(--condensed); letter-spacing: .08em; color: var(--accent); }
.float-menu__hint { margin: 0 0 .65rem; font-size: .69rem; color: var(--muted); }
#menuLinks { display: grid; }
.float-menu__row { display: grid; grid-template-columns: minmax(0,1fr) 44px; align-items: center; border-bottom: 1px solid #c2a56820; }
.float-menu__link { display: flex; align-items: center; gap: .6rem; padding: .72rem .35rem; border-radius: 5px; color: var(--champagne); text-decoration: none; font-size: .77rem; }
.float-menu__link.is-current { background: #b4914633; }
.float-menu__link.is-cta { background: var(--gold); color: #17140c; font-weight: 600; }
.float-menu__link.is-cta.is-current { outline: 1px solid var(--accent); outline-offset: -1px; }
.float-menu__link[aria-disabled=true] { color: #897c66; text-decoration: line-through; }
.menu-section-icon { flex: 0 0 18px; width: 18px; height: 18px; fill: none; stroke: var(--gold); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.is-cta .menu-section-icon { stroke: #342713; }
.section-visibility { position: relative; display: grid; place-items: center; width: 44px; height: 36px; }
.section-visibility__input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; margin: 0; cursor: pointer; }
.section-visibility__track { position: relative; width: 36px; height: 21px; border: 1px solid #9a804e; border-radius: 99px; background: #29251d; pointer-events: none; }
.section-visibility__track span { position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #958566; transition: transform .2s; }
.section-visibility:has(input:checked) .section-visibility__track { background: var(--gold); border-color: var(--accent); }
.section-visibility:has(input:checked) .section-visibility__track span { transform: translateX(15px); background: #fff8e7; }
.section-visibility:has(input:disabled) { opacity: .5; }
.section-visibility input:focus-visible + .section-visibility__track { outline: 2px solid var(--accent); outline-offset: 4px; }
.menu-demo-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .6rem; padding: .8rem 0 .2rem; font-size: .69rem; color: var(--muted); }
.menu-demo-footer p { margin: 0; }
.menu-demo-footer > button { border: 0; border-bottom: 1px solid var(--gold); padding: .3rem 0; background: none; color: var(--accent); cursor: pointer; font-size: .7rem; }
.menu-demo-footer .button { flex-basis: 100%; font-size: .7rem; }
.float-menu__close { display: flex; justify-content: space-between; width: 100%; margin-top: .5rem; min-height: 40px; padding: .7rem 0; border: 0; background: none; color: var(--muted); font-size: .73rem; cursor: pointer; }
.float-menu__close span { font-size: 1.2rem; line-height: 1; }
.ambience-control { width: 100%; margin-top: .65rem; text-align: left; }
.float-music { position: fixed; top: 1rem; right: max(.75rem, env(safe-area-inset-right)); display: flex; gap: .4rem; align-items: center; min-height: 44px; padding: .7rem 1rem; border: 1px solid var(--line); border-radius: 999px; background: #111110ef; color: var(--accent); font-size: .72rem; cursor: pointer; }
.menu-tip { position: absolute; top: calc(100% + 12px); left: 0; width: min(17rem, calc(100vw - 1.5rem)); padding: .8rem; border: 0; border-radius: 8px; background: var(--accent); color: #211b10; font-size: .72rem; cursor: pointer; }
.oc-hidden, .oc-demo-off { display: none !important; }
.footer { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1.5rem max(1.5rem, calc((100vw - 640px)/2)); border-top: 1px solid var(--line); color: var(--muted); font: 600 .75rem var(--condensed); letter-spacing: .08em; }
.footer a { text-decoration: none; font-size: 1.2rem; color: var(--gold); }
@media (max-width: 380px) {
  .hero__eyebrow { font-size: .62rem; letter-spacing: .17em; }
  .hero__title-script { font-size: clamp(4.7rem, 22vw, 5.6rem); }
  .hero__tagline { top: 60%; font-size: .72rem; }
  .hero__event-date { font-size: 1.6rem; }
  .hero__actions { gap: .4rem; }
  .hero__actions .button { padding-inline: .7rem; font-size: .66rem; }
}
@media (max-height: 560px) and (orientation: landscape) {
  .hero { min-height: 600px; }
  .hero__eyebrow { top: 27%; }
  .hero__title { top: 32%; }
  .hero__title-first { font-size: 2.4rem; }
  .hero__title-script { font-size: 5.5rem; }
  .envelope-stage { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: .8rem 2rem; width: 92%; }
  .envelope-stage > .eyebrow { width: 100%; margin: 0; }
  .envelope-stage h2 { margin: 0; font-size: 3rem; }
  .envelope { width: 230px; height: 145px; min-height: 0; }
  .envelope-stage__hint { width: 100%; margin: 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}