:root {
  --paper: #fbf7f0;
  --paper-deep: #f3ebde;
  --ink: #3b302c;
  --ink-soft: #6f625b;
  --wine: #8e2440;
  --wine-deep: #6c1830;
  --rose: #e9a9b3;
  --sage: #8a9a6b;
  --gold: #c7a46a;
  --sunset: #f3b56b;

  --font-script: "Pinyon Script", cursive;
  --font-serif: "EB Garamond", Georgia, serif;
  --font-sans: "Montserrat", system-ui, sans-serif;

  --text-base: clamp(1rem, .95rem + .25vw, 1.125rem);
  --text-names: clamp(3.4rem, 2rem + 7vw, 6.4rem);
  --space-section: clamp(4.5rem, 3rem + 6vw, 8rem);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --flora: clamp(96px, 26vw, 170px);
  --flora-gap: calc(var(--flora) + 6px);
  --shadow-paper: 0 1px 0 rgba(255,255,255,.8) inset, 0 30px 60px -30px rgba(90,50,40,.35), 0 8px 20px -12px rgba(90,50,40,.2);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% 0%, #fff 0%, transparent 60%),
    radial-gradient(900px 700px at 100% 40%, #f7e8e3 0%, transparent 60%),
    var(--paper);
  overflow-x: hidden;
}
body.is-locked { overflow: hidden; height: 100vh; }
img { display: block; max-width: 100%; height: auto; }
.hero__date, .event__day, .event__lunar, .countdown__row b { font-variant-numeric: lining-nums tabular-nums; }
a { color: inherit; }

/* Hạt giấy mịn */
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 100; opacity: .25; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 .55 0 0 0 0 .45 0 0 0 0 .4 0 0 0 .18 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Chung ---------- */
.eyebrow {
  font-family: var(--font-sans); font-weight: 500; font-size: .72rem;
  letter-spacing: .38em; text-transform: uppercase; color: var(--gold);
}
.eyebrow--light { color: #fff3e2; }

.names { font-family: var(--font-script); font-weight: 400; line-height: 1.1; font-size: var(--text-names); }
.names span { display: block; }
.names em { display: block; font-style: italic; font-family: var(--font-serif); font-size: .3em; margin: .25em 0; letter-spacing: .1em; }
.names--ink { color: var(--wine); }
.names--ink em { color: var(--gold); }

.section-title {
  font-family: var(--font-script); font-weight: 400; color: var(--wine);
  font-size: clamp(2.8rem, 2rem + 4vw, 4.2rem); line-height: 1; text-align: center; margin-bottom: 2.5rem;
}
.section-title small {
  display: block; font-family: var(--font-sans); font-size: .72rem; font-weight: 500;
  letter-spacing: .38em; text-transform: uppercase; color: var(--sage); margin-bottom: .9rem;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .6rem;
  font-family: var(--font-sans); font-size: .82rem; font-weight: 500; letter-spacing: .2em; text-transform: uppercase;
  border-radius: 999px; padding: .95rem 1.8rem; cursor: pointer; text-decoration: none; border: 0;
  transition: transform .4s var(--ease-out), box-shadow .4s var(--ease-out), background-color .3s;
}
.btn:focus-visible { outline: 2px solid var(--wine); outline-offset: 4px; }
.btn--solid { background: var(--wine); color: #fff; box-shadow: 0 12px 24px -12px rgba(142,36,64,.7); }
.btn--solid:hover { transform: translateY(-2px); background: var(--wine-deep); }
.btn--ghost { border: 1px solid var(--wine); color: var(--wine); background: transparent; margin-top: 1.4rem; }
.btn--ghost:hover { background: var(--wine); color: #fff; }
.btn:active { transform: translateY(1px) scale(.98); }

.flora { position: absolute; z-index: 0; width: var(--flora); height: var(--flora); pointer-events: none; }
.flora--tl { top: -8px; left: -8px; transform: rotate(180deg) scaleX(-1); }
.flora--br { bottom: -8px; right: -8px; }

/* ---------- Phong bì ---------- */
.cover {
  position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; padding: 16px;
  background:
    linear-gradient(rgba(60,30,25,.35), rgba(60,30,25,.55)),
    url("../images/anh-07.jpg") center/cover no-repeat;
  transition: opacity 1s var(--ease-out), visibility 1s;
}
.cover.is-open { opacity: 0; visibility: hidden; }
.cover.is-open .cover__paper { transform: translateY(-40px) scale(.96); }
.cover__paper {
  position: relative; overflow: hidden; width: min(420px, 100%); padding: var(--flora-gap) 2rem var(--flora-gap);
  text-align: center; background: var(--paper); border-radius: 4px; box-shadow: 0 40px 80px -30px rgba(0,0,0,.6);
  transition: transform 1s var(--ease-out);
  animation: rise 1.2s var(--ease-out) both;
}
.cover__paper::after { content: ""; position: absolute; inset: 12px; border: 1px solid rgba(199,164,106,.55); pointer-events: none; }
.monogram { width: min(250px, 74%); height: auto; margin: 1.2rem auto 1rem; animation: bloom 1.6s .3s var(--ease-out) both; }
.cover__to { font-family: var(--font-serif); font-style: italic; color: var(--ink-soft); font-size: 1.1rem; }
.cover__guest {
  font-family: var(--font-serif); font-weight: 600; font-size: clamp(1.5rem, 1.2rem + 1.5vw, 1.9rem);
  color: var(--ink); margin: .2rem 0 2.2rem; line-height: 1.3; overflow-wrap: anywhere;
}
.btn--seal { background: var(--wine); color: #fff; padding: .9rem 1.8rem .9rem 1rem; box-shadow: 0 14px 30px -12px rgba(142,36,64,.8); }
.btn--seal:hover { transform: translateY(-2px); }
.seal {
  display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #c4455f, #6c1830); box-shadow: inset 0 0 0 2px rgba(255,255,255,.25);
  font-size: .9rem; animation: beat 1.6s ease-in-out infinite;
}

/* ---------- Hero ---------- */
.hero { position: relative; height: 100svh; min-height: 560px; overflow: hidden; color: #fff; }
.hero__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 60%; transform: scale(1.08); transition: transform 6s var(--ease-out); }
body.is-ready .hero__img { transform: scale(1); }
.hero__veil { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(40,20,10,.15) 0%, rgba(40,20,10,0) 35%, rgba(40,20,10,.55) 100%); }
.hero__text { position: absolute; left: 0; right: 0; bottom: 14svh; text-align: center; padding: 0 16px; text-shadow: 0 2px 24px rgba(60,20,10,.45); }
.hero__text .names { margin: .6rem 0 1rem; }
.hero__text .names em { color: #ffe6c4; }
.hero__date { font-family: var(--font-sans); font-weight: 300; font-size: 1.05rem; letter-spacing: .45em; padding-left: .45em; }
.hero__text > * { opacity: 0; transform: translateY(20px); transition: opacity 1.2s var(--ease-out), transform 1.2s var(--ease-out); }
body.is-ready .hero__text > * { opacity: 1; transform: none; }
body.is-ready .hero__text > :nth-child(2) { transition-delay: .25s; }
body.is-ready .hero__text > :nth-child(3) { transition-delay: .5s; }
.scroll-cue { position: absolute; bottom: 4svh; left: 50%; translate: -50% 0; width: 26px; height: 42px; border: 1.5px solid rgba(255,255,255,.8); border-radius: 20px; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: #fff; animation: cue 1.8s ease-in-out infinite; }

/* ---------- Báo tin ---------- */
.card-section { padding: var(--space-section) 16px calc(var(--space-section) * .6); }
.paper {
  position: relative; overflow: hidden; max-width: 620px; margin: 0 auto; padding: var(--flora-gap) clamp(1.25rem, 5vw, 3.5rem);
  text-align: center; background: linear-gradient(180deg, #fffdf9, var(--paper)); box-shadow: var(--shadow-paper); border-radius: 3px;
}
.paper--frame::after { content: ""; position: absolute; inset: 14px; border: 1px solid rgba(199,164,106,.5); pointer-events: none; }
.crest { width: min(300px, 86%); height: auto; margin: 0 auto 1.6rem; }
.lead { font-family: var(--font-serif); font-size: 1.25rem; font-style: italic; color: var(--ink-soft); margin-bottom: 1.6rem; }
.paper .names { font-size: clamp(3.1rem, 2rem + 5vw, 4.8rem); }

.families { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; margin-top: 2.8rem; align-items: start; }
.families__divider { width: 1px; height: 100%; background: linear-gradient(transparent, var(--gold), transparent); }
.family__side { font-size: .72rem; font-weight: 500; letter-spacing: .3em; text-transform: uppercase; color: var(--sage); margin-bottom: .6rem; }
.family__name { font-family: var(--font-serif); font-weight: 600; font-size: 1.15rem; line-height: 1.45; color: var(--ink); }
.family__addr { font-size: .88rem; color: var(--ink-soft); margin-top: .5rem; line-height: 1.6; }

/* ---------- Sự kiện ---------- */
.events { padding: calc(var(--space-section) * .6) 16px var(--space-section); }
.events__grid { display: grid; gap: 1.5rem; max-width: 880px; margin: 0 auto; grid-template-columns: 1fr; }
.event {
  position: relative; text-align: center; padding: 2.6rem 1.5rem 2.4rem; border-radius: 200px 200px 6px 6px;
  background: #fffdf9; box-shadow: var(--shadow-paper); border: 1px solid rgba(199,164,106,.35);
}
.event--main { background: linear-gradient(180deg, #fff6ef, #fdeee9); border-color: rgba(142,36,64,.25); }
.event__kind { font-family: var(--font-script); font-size: clamp(1.7rem, 1.3rem + 1.6vw, 2.3rem); white-space: nowrap; color: var(--wine); line-height: 1.1; margin-top: 1.2rem; }
.event__time { font-size: .82rem; letter-spacing: .25em; text-transform: uppercase; color: var(--ink-soft); margin: .6rem 0 1.2rem; }
.event__date { display: grid; justify-items: center; gap: .1rem; }
.event__weekday { font-family: var(--font-serif); font-style: italic; font-size: 1.1rem; color: var(--ink-soft); }
.event__day { font-family: var(--font-serif); font-weight: 500; font-size: 4.6rem; line-height: 1; color: var(--ink); }
.event__month { font-size: .8rem; letter-spacing: .3em; text-transform: uppercase; color: var(--gold); font-weight: 500; }
.event__lunar { font-family: var(--font-serif); font-style: italic; color: var(--ink-soft); margin-top: .8rem; }
.event__place { margin-top: 1.2rem; padding-top: 1.2rem; border-top: 1px dashed rgba(199,164,106,.6); font-size: .95rem; }
.event__place strong { font-weight: 600; letter-spacing: .1em; color: var(--wine); }

.countdown { text-align: center; margin: 3.5rem auto 0; max-width: 520px; }
.countdown__label { font-family: var(--font-serif); font-style: italic; font-size: 1.15rem; color: var(--ink-soft); margin-bottom: .9rem; }
.countdown__row { display: grid; grid-template-columns: repeat(4, 1fr); gap: .6rem; }
.countdown__row div { padding: 1rem .2rem .8rem; border-radius: 14px; background: #fffdf9; border: 1px solid rgba(199,164,106,.35); }
.countdown__row b { display: block; font-family: var(--font-sans); font-weight: 300; font-size: clamp(1.8rem, 1.4rem + 2vw, 2.6rem); line-height: 1; color: var(--wine); font-variant-numeric: tabular-nums; }
.countdown__row span { font-size: .68rem; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-soft); }

.invite-note { text-align: center; font-family: var(--font-serif); font-style: italic; font-size: 1.3rem; color: var(--ink); margin-top: 3rem; }

/* ---------- Album ---------- */
.album { padding: var(--space-section) 16px; background: linear-gradient(180deg, transparent, #f5e9e1 20%, #f5e9e1 80%, transparent); }
.album__grid { --album-gap: 10px; max-width: 720px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: var(--album-gap); }
.album__item {
  display: block; width: 100%; padding: 0; border: 0; cursor: zoom-in;
  overflow: hidden; border-radius: 6px; background: var(--paper-deep);
}
.album__item img { width: 100%; height: 100%; aspect-ratio: 2 / 3; object-fit: cover; transition: transform .8s var(--ease-out), filter .5s; }
.album__item--wide { grid-column: 1 / -1; }
.album__item--wide img { aspect-ratio: auto; object-fit: contain; }
.album__item:hover img { transform: scale(1.04); filter: saturate(1.1); }
.album__item:focus-visible { outline: 2px solid var(--wine); outline-offset: 3px; }

.lightbox { border: 0; padding: 0; width: 100vw; height: 100vh; max-width: none; max-height: none; background: rgba(20,12,10,.94); }
.lightbox[open] { display: grid; place-items: center; }
.lightbox::backdrop { background: rgba(20,12,10,.9); }
.lightbox__img { max-width: 94vw; max-height: 88vh; object-fit: contain; border-radius: 4px; }
.lightbox__btn svg { pointer-events: none; }
.lightbox__btn { display: grid; place-items: center; position: fixed; border: 0; background: rgba(255,255,255,.12); color: #fff; width: 48px; height: 48px; border-radius: 50%; font-size: 1.6rem; cursor: pointer; backdrop-filter: blur(6px); }
.lightbox__btn:hover { background: rgba(255,255,255,.25); }
.lightbox__close { top: 16px; right: 16px; font-size: 1.1rem; }
.lightbox__prev { left: 12px; top: 50%; translate: 0 -50%; }
.lightbox__next { right: 12px; top: 50%; translate: 0 -50%; }

/* ---------- Bản đồ ---------- */
.map { padding: var(--space-section) 16px; text-align: center; }
.map__frame { max-width: 880px; margin: 0 auto 2rem; border-radius: 18px; overflow: hidden; box-shadow: var(--shadow-paper); border: 6px solid #fff; }
.map__frame iframe { display: block; width: 100%; height: clamp(280px, 50vw, 420px); border: 0; }

/* ---------- Footer ---------- */
.footer {
  position: relative; overflow: hidden; text-align: center; color: #fff; padding: calc(var(--flora) * 1.25 + 1rem) 16px 6rem;
  background: linear-gradient(rgba(70,30,20,.55), rgba(70,30,20,.7)), url("../images/anh-06.jpg") center 40%/cover;
}
.flora--footer { top: -12px; left: 50%; translate: -50% 0; transform: rotate(135deg); opacity: .9; }
.footer__thanks { font-family: var(--font-script); font-size: clamp(3.5rem, 2.5rem + 5vw, 5.5rem); line-height: 1; }
.footer__text { font-family: var(--font-serif); font-style: italic; font-size: clamp(1rem, .85rem + .9vw, 1.2rem); margin: .8rem auto 1.6rem; }
.footer__sign { font-size: .78rem; letter-spacing: .35em; text-transform: uppercase; color: #ffe6c4; }

/* ---------- Cánh hoa rơi ---------- */
.petals { position: fixed; inset: 0; pointer-events: none; z-index: 40; overflow: hidden; }
.petal {
  position: absolute; top: -30px; width: 14px; height: 11px; border-radius: 80% 0 80% 0;
  background: linear-gradient(135deg, #fbe0e4, var(--rose)); opacity: .85;
  animation: fall linear forwards;
}

/* ---------- Hiệu ứng xuất hiện ---------- */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity 1.1s var(--ease-out), transform 1.1s var(--ease-out); }
.reveal.is-in { opacity: 1; transform: none; }

@keyframes rise { from { opacity: 0; transform: translateY(40px); } }
@keyframes beat { 50% { transform: scale(1.15); } }
@keyframes cue { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }
@keyframes bloom { from { opacity: 0; transform: scale(.85) rotate(-6deg); } }
@keyframes fall {
  to { transform: translate3d(var(--drift, 60px), 110vh, 0) rotate(var(--spin, 540deg)); }
}

@media (min-width: 720px) {
  .events__grid { grid-template-columns: 1fr 1fr; }
  .album__grid { --album-gap: 14px; }
}

@media (max-width: 420px) {
  .families { grid-template-columns: 1fr; gap: 1.8rem; }
  .families__divider { width: 60px; height: 1px; margin: 0 auto; background: linear-gradient(90deg, transparent, var(--gold), transparent); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal, .hero__text > * { opacity: 1; transform: none; }
  .petals { display: none; }
}

/* ---------- Hộp mừng cưới ---------- */
.gift { padding: calc(var(--space-section) * .6) 16px var(--space-section); text-align: center; }
.gift__intro { font-family: var(--font-serif); font-style: italic; font-size: 1.1rem; color: var(--ink-soft); max-width: 34rem; margin: -1rem auto 2rem; text-wrap: balance; }
.gift__box { max-width: 400px; margin: 0 auto; }
.gift__box summary { list-style: none; }
.gift__box summary::-webkit-details-marker { display: none; }
.gift__box[open] summary { margin-bottom: 1.6rem; }
.gift__card {
  background: #fffdf9; border: 1px solid rgba(199,164,106,.4); border-radius: 18px; padding: 1.2rem 1.2rem 1.6rem;
  box-shadow: var(--shadow-paper); animation: rise .8s var(--ease-out) both;
}
.gift__card img { width: 100%; border-radius: 12px; }
.gift__info { margin: 1.2rem 0 0; display: grid; gap: .7rem; text-align: center; }
.gift__info div { padding-bottom: .7rem; border-bottom: 1px dashed rgba(199,164,106,.5); }
.gift__info dt { font-size: .68rem; margin-bottom: .2rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); }
.gift__info dd { margin: 0; font-weight: 600; font-size: 1.05rem; color: var(--ink); font-variant-numeric: tabular-nums; letter-spacing: .03em; }
.gift__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: .6rem; margin-top: 1.2rem; }
.gift__actions .btn { margin-top: 0; padding: .8rem 1.2rem; font-size: .72rem; letter-spacing: .12em; }

/* ---------- Nút nhạc ---------- */
.music-toggle {
  position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 45;
  width: 48px; height: 48px; border-radius: 50%; border: 0; cursor: pointer; display: grid; place-items: center;
  background: var(--wine); color: #fff; box-shadow: 0 10px 24px -10px rgba(142,36,64,.8);
  transition: transform .3s var(--ease-out), background-color .3s;
}
.music-toggle[hidden] { display: none; }
.music-toggle:hover { transform: scale(1.06); }
.music-toggle:focus-visible { outline: 2px solid var(--wine); outline-offset: 4px; }
.music-toggle svg { pointer-events: none; }
.music-toggle__on, .music-toggle.is-playing .music-toggle__off { display: none; }
.music-toggle.is-playing .music-toggle__on { display: block; }
.music-toggle.is-playing { animation: spin 6s linear infinite; }
.music-toggle:not(.is-playing) { background: #b98a95; }
@keyframes spin { to { transform: rotate(360deg); } }