:root {
  --beige: #f4ead9;
  --beige-light: #fbf6ec;
  --beige-dark: #e6d5b8;
  --wine: #7a1f2b;
  --wine-dark: #55121c;
  --gold: #b08d57;
  --ink: #3a2a24;
  --serif: "Playfair Display", "Times New Roman", serif;
  --script: "Cormorant Garamond", Georgia, serif;
  --sans: "Be Vietnam Pro", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 3.6rem; }
:root { --ease-out: cubic-bezier(.22, .61, .36, 1); }
body { font-family: var(--sans); font-weight: 300; color: var(--ink); background: var(--beige-light); line-height: 1.7; }
img { max-width: 100%; display: block; }

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  display: flex; justify-content: center; gap: 2rem; padding: .9rem 1rem;
  background: rgba(251, 246, 236, .85); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--beige-dark);
}
.nav a { color: var(--wine); text-decoration: none; font-size: .78rem; letter-spacing: .18em; text-transform: uppercase; font-weight: 500; }
.nav a:hover { color: var(--gold); }

/* Buttons */
.btn {
  display: inline-block; padding: .85rem 2rem; border: 1px solid var(--wine);
  background: var(--wine); color: var(--beige-light); text-decoration: none;
  letter-spacing: .12em; text-transform: uppercase; font-size: .78rem; transition: .25s;
}
.btn:hover { background: transparent; color: var(--wine); }
.btn.light { background: var(--beige); color: var(--wine-dark); border-color: var(--beige); }
.btn.light:hover { background: transparent; color: var(--beige); }

/* Hero */
/* Ảnh nền: thay file images/hero.jpg (nếu chưa có sẽ hiện nền be mặc định) */
.hero {
  min-height: 100vh; display: grid; align-items: center; justify-items: end;
  padding: 6rem clamp(1.2rem, 7vw, 6rem) 4rem; position: relative;
  background:
    linear-gradient(90deg, rgba(244, 234, 217, 0) 30%, rgba(244, 234, 217, .55) 100%),
    url("images/hero.jpg") center / cover no-repeat,
    radial-gradient(circle at 30% 20%, #fffaf0 0%, transparent 60%),
    var(--beige);
}
.frame {
  max-width: 540px; width: 100%; text-align: center; padding: 4rem 1.5rem;
  border: 1px solid var(--wine); outline: 1px solid var(--gold); outline-offset: 8px;
  background: rgba(251, 246, 236, .85); backdrop-filter: blur(3px);
}
.eyebrow { font-family: var(--script); font-style: italic; font-size: 1.5rem; color: var(--gold); }
h1 { font-family: var(--serif); font-weight: 500; color: var(--wine); margin: 1rem 0; display: flex; flex-direction: column; align-items: center; line-height: 1.15; }
h1 .name { font-size: clamp(2.4rem, 8vw, 4.6rem); }
h1 .amp { font-family: var(--script); font-style: italic; font-size: clamp(2rem, 6vw, 3.2rem); color: var(--gold); }
.ornament { display: flex; align-items: center; justify-content: center; gap: 1rem; color: var(--gold); margin: 1.5rem 0; }
.ornament span { width: 80px; height: 1px; background: var(--gold); }
.lead { max-width: 480px; margin: 0 auto 1.5rem; font-family: var(--script); font-size: 1.35rem; }
.date { font-family: var(--serif); color: var(--wine); letter-spacing: .12em; margin-bottom: 2rem; }
.scroll { position: absolute; bottom: 1rem; color: var(--wine); font-size: 2rem; text-decoration: none; animation: bob 2s infinite; }
@keyframes bob { 50% { transform: translateY(6px); } }

/* Sections */
.section { padding: 6rem 1.2rem; }
.title { font-family: var(--serif); font-weight: 500; font-size: clamp(1.9rem, 5vw, 2.8rem); color: var(--wine); text-align: center; }
.subtitle { font-family: var(--script); font-style: italic; font-size: 1.3rem; text-align: center; color: var(--gold); margin-bottom: 3.5rem; }
.title.light { color: var(--beige); }
.subtitle.light { color: var(--beige-dark); }

/* Story */
.timeline { max-width: 960px; margin: 0 auto; display: grid; gap: 3rem; position: relative; }
.timeline::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: var(--gold); opacity: .5; }
.card { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; position: relative; }
.card::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 13px; height: 13px;
  background: var(--wine); border: 3px solid var(--beige-light); border-radius: 50%; transform: translate(-50%, -50%);
}
.card:nth-child(even) .photo { order: 2; }
.photo {
  aspect-ratio: 4 / 3; position: relative; display: grid; place-items: center; overflow: hidden;
  background: var(--beige); border: 1px solid var(--gold); outline: 1px solid var(--beige-dark); outline-offset: 6px;
  color: var(--gold); font-family: var(--script); font-style: italic; font-size: 1.2rem;
}
.photo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.text time { font-family: var(--script); font-style: italic; font-size: 1.2rem; color: var(--gold); }
.text h3 { font-family: var(--serif); font-weight: 500; font-size: 1.6rem; color: var(--wine); margin: .2rem 0 .5rem; }
.card:nth-child(even) .text { text-align: right; }

/* Venue */
.venue { background: var(--wine); background-image: radial-gradient(circle at 50% 0%, #8e2a38, var(--wine-dark) 90%); color: var(--beige); }
.venue-grid { max-width: 1000px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.3fr; gap: 3rem; align-items: center; }
.row { padding: 1.2rem 0; border-bottom: 1px solid rgba(230, 213, 184, .3); }
.row b { display: block; font-family: var(--script); font-style: italic; font-weight: 400; color: var(--gold); font-size: 1.2rem; }
.row span { font-family: var(--serif); font-size: 1.3rem; }
.info .btn { margin-top: 2rem; }
.map { border: 1px solid var(--gold); outline: 1px solid rgba(176, 141, 87, .5); outline-offset: 6px; aspect-ratio: 4 / 3; }
.map iframe { width: 100%; height: 100%; border: 0; }
/* Thanks: thay ảnh nền bằng images/thanks.jpg (chưa có sẽ hiện nền be) */
.thanks-section {
  min-height: 100vh; display: grid; grid-template-rows: 1fr auto; justify-items: center; align-items: center;
  padding: 4rem 1.2rem 2rem; position: relative;
  background:
    linear-gradient(rgba(244, 234, 217, .25), rgba(244, 234, 217, .25)),
    url("images/thanks.jpg") center / cover no-repeat,
    radial-gradient(circle at 50% 30%, #fffaf0 0%, transparent 60%),
    var(--beige);
}
.thanks-box {
  padding: 1.4rem 3rem; background: rgba(251, 246, 236, .88);
  border: 1px solid var(--wine); outline: 1px solid var(--gold); outline-offset: 6px;
  font-family: var(--serif); font-size: clamp(1.3rem, 4vw, 2rem); color: var(--wine); text-align: center; letter-spacing: .04em;
}
footer { text-align: center; width: 100%; font-family: var(--script); font-style: italic; font-size: 1.1rem; color: var(--wine); }

/* Timeline ngang các nghi lễ */
.steps { list-style: none; max-width: 960px; margin: 5rem auto 0; display: grid; grid-template-columns: repeat(4, 1fr); position: relative; }
.steps::before { content: ""; position: absolute; top: 31px; left: 12.5%; right: 12.5%; height: 1px; background: var(--gold); opacity: .6; }
.step { text-align: center; padding: 0 .6rem; position: relative; }
.step-icon {
  width: 62px; height: 62px; margin: 0 auto 1rem; display: grid; place-items: center; border-radius: 50%;
  background: var(--wine-dark); border: 1px solid var(--gold); color: var(--beige);
}
.step h4 { font-family: var(--serif); font-weight: 500; font-size: 1.15rem; }
.step time { font-family: var(--script); font-size: 1.15rem; color: var(--beige-dark); }
.step em { display: block; font-size: .72rem; font-style: normal; letter-spacing: .12em; text-transform: uppercase; color: var(--gold); }
.step.past { opacity: .45; }
.step.past h4 { text-decoration-thickness: 1px; }

/* Tabs nhà trai / nhà gái */
.tabs { display: flex; justify-content: center; width: fit-content; margin: 0 auto 3rem; border: 1px solid var(--gold); }
.tab {
  padding: .8rem 2.4rem; background: transparent; color: var(--beige); border: 0; cursor: pointer;
  font: 500 .8rem var(--sans); letter-spacing: .16em; text-transform: uppercase; transition: .25s;
}
.tab + .tab { border-left: 1px solid var(--gold); }
.tab:hover { background: rgba(244, 234, 217, .12); }
.tab.active { background: var(--beige); color: var(--wine-dark); }
.panel[hidden] { display: none; }
.panel { animation: pop .3s ease; }
.row small { font-size: .95rem; font-family: var(--sans); font-weight: 300; }

/* Floating button */
.fab {
  position: fixed; right: 1.2rem; bottom: 1.2rem; z-index: 30; cursor: pointer;
  padding: .8rem 1.3rem; border: 1px solid var(--gold); border-radius: 999px;
  background: var(--beige-light); color: var(--wine); font: 500 .85rem var(--sans); letter-spacing: .06em;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .25); transition: .25s;
}
.fab:hover { background: var(--wine); color: var(--beige-light); }
.fab span { color: #c0283c; }
.fab:hover span { color: var(--beige-light); }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 40; display: grid; place-items: center; padding: 1rem; background: rgba(40, 10, 15, .65); }
.modal[hidden] { display: none; }
.modal-box {
  position: relative; width: min(560px, 100%); max-height: 92vh; overflow: auto; text-align: center;
  padding: 2.5rem 1.5rem 2rem; background: var(--beige-light); color: var(--ink);
  border: 1px solid var(--wine); outline: 1px solid var(--gold); outline-offset: -8px;
  animation: pop .25s ease;
}
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(.97); } }
.modal-box h3 { font-family: var(--serif); font-weight: 500; color: var(--wine); font-size: 1.5rem; margin-bottom: 1.5rem; }
.close { position: absolute; top: .6rem; right: .9rem; background: none; border: 0; font-size: 2rem; color: var(--wine); cursor: pointer; line-height: 1; }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.qr { aspect-ratio: 3 / 4; position: relative; display: grid; place-items: center; background: #fff; border: 1px solid var(--gold); color: var(--gold); font-family: var(--script); font-style: italic; margin-bottom: .6rem; }
.qr { overflow: hidden; }
.qr img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.qr img[src$="gai.JPG"] { transform: scale(1.05); } /* giấu viền bo góc sẵn có trong ảnh */
figcaption { font-size: .88rem; }
figcaption b { font-family: var(--serif); color: var(--wine); font-weight: 500; }
.thanks { margin-top: 1.5rem; font-family: var(--script); font-style: italic; font-size: 1.2rem; color: var(--gold); }

/* Album: lưới masonry giữ nguyên tỉ lệ ảnh ngang/dọc */
.gallery { max-width: 1100px; margin: 0 auto; display: flex; align-items: flex-start; gap: 1.4rem; }
/* Cột do JS dựng (masonry): CSS columns + transform bị lỗi vị trí trên Safari/Chrome iOS */
.gallery-col { flex: 1 1 0; min-width: 0; }
.shot { display: block; width: 100%; margin: 0 0 1.4rem; }
.shot button {
  display: block; position: relative; width: 100%; padding: 0; cursor: zoom-in; overflow: hidden;
  background: var(--beige); border: 6px solid #fffdf8; box-shadow: 0 8px 24px rgba(85, 18, 28, .15);
  transition: transform .4s ease, box-shadow .4s ease; color: var(--gold); font: italic 1.1rem var(--script);
}
.shot.portrait:not(.loaded) button { aspect-ratio: 3 / 4; }
.shot.landscape:not(.loaded) button { aspect-ratio: 4 / 3; }
.shot button:hover, .shot button:focus-visible { transform: translateY(-4px); box-shadow: 0 14px 32px rgba(85, 18, 28, .25); outline: none; }
.shot span { position: absolute; inset: 0; display: grid; place-items: center; }
.shot img { display: block; width: 100%; height: auto; opacity: 0; transition: opacity .8s ease, transform 1.2s ease; }
.shot:not(.loaded) img { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.shot.loaded img { opacity: 1; position: relative; z-index: 1; }
.shot.loaded span { display: none; }
.shot button:hover img { transform: scale(1.04); }
.js .shot { opacity: 0; transform: translateY(24px); transition: opacity .9s var(--ease-out), transform .9s var(--ease-out); transition-delay: var(--d, 0s); }
.js .shot.in { opacity: 1; transform: none; }
/* Album bám theo thanh cuộn: JS đặt --p (0→1) cho từng ảnh; transition ngắn để làm mượt các bước cuộn */
.js .scrub .shot {
  opacity: var(--p, 0);
  transform: translateY(calc((1 - var(--p, 0)) * 50px)) scale(calc(.94 + var(--p, 0) * .06));
  transition: opacity .3s ease-out, transform .3s ease-out; transition-delay: 0s; will-change: transform, opacity;
}

/* Hiện dần khi cuộn tới (JS gắn class .reveal / .in, độ trễ --d) */
.js .reveal { transition: opacity 1s var(--ease-out), transform 1s var(--ease-out); transition-delay: var(--d, 0s); }
.js .reveal:not(.in) { opacity: 0; transform: translateY(28px); }
.js .reveal.from-left:not(.in) { transform: translateX(-48px); }
.js .reveal.from-right:not(.in) { transform: translateX(48px); }
.js .reveal.zoom:not(.in) { transform: scale(.94); }

/* Hành trình: chuyển động bám theo thanh cuộn. JS đặt --p (0→1) cho từng ảnh/chữ, --line cho đường kẻ */
.story { overflow-x: hidden; overflow-x: clip; }
.card { --dir: -1; }
.card:nth-child(even) { --dir: 1; }
.scrub .photo, .scrub .text { will-change: transform, opacity; }
.scrub .photo {
  opacity: var(--p, 1);
  transform: translateX(calc((1 - var(--p, 1)) * var(--dir) * 90px)) scale(calc(.9 + var(--p, 1) * .1));
}
.scrub .text {
  opacity: var(--p, 1);
  transform: translateX(calc((1 - var(--p, 1)) * var(--dir) * -90px));
}
.timeline.scrub::after {
  content: ""; position: absolute; left: 50%; top: 0; width: 2px; margin-left: -.5px; z-index: 0;
  height: calc(var(--line, 1) * 100%); background: linear-gradient(var(--gold), var(--wine));
}
.card::after { z-index: 1; transition: background .4s ease, box-shadow .4s ease, transform .4s ease; }
.scrub .card:not(.reached)::after { background: var(--beige-dark); }
.scrub .card.reached::after { box-shadow: 0 0 0 5px rgba(176, 141, 87, .25); }

/* Lightbox */
.lightbox { position: fixed; inset: 0; z-index: 50; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: .5rem; padding: 1rem; background: rgba(35, 8, 13, .94); }
.lightbox[hidden] { display: none; }
.lb-stage { margin: 0; display: grid; justify-items: center; gap: .8rem; min-width: 0; animation: pop .3s ease; }
.lightbox { touch-action: pan-y pinch-zoom; }
.lb-stage img {
  max-width: 100%; max-height: 82vh; object-fit: contain; border: 6px solid #fffdf8; box-shadow: 0 20px 60px rgba(0, 0, 0, .5); background: var(--beige);
  transition: transform .35s var(--ease-out), opacity .35s ease; will-change: transform; user-select: none; -webkit-user-drag: none; cursor: grab;
}
.lb-stage img.dragging { transition: none; cursor: grabbing; }
.lb-stage figcaption { color: var(--beige-dark); font: italic 1.1rem var(--script); letter-spacing: .1em; }
.lb-nav, .lb-close {
  width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--gold); cursor: pointer;
  background: rgba(251, 246, 236, .1); color: var(--beige); font-size: 1.9rem; line-height: 1; transition: .25s;
}
.lb-nav:hover, .lb-close:hover { background: var(--beige); color: var(--wine); }
.lb-close { position: absolute; top: 1rem; right: 1rem; z-index: 2; }

/* Responsive */
@media (max-width: 760px) {
  html { scroll-padding-top: 2.8rem; }

  /* Menu: một dòng, vuốt ngang nếu thiếu chỗ */
  .nav {
    justify-content: space-between; gap: .9rem; padding: .75rem 1rem;
    overflow-x: auto; white-space: nowrap; scrollbar-width: none; -webkit-overflow-scrolling: touch;
  }
  .nav::-webkit-scrollbar { display: none; }
  .nav a { font-size: .68rem; letter-spacing: .07em; flex: none; }

  /* Mở đầu: ảnh thành khối riêng phía trên, khung chữ đè nhẹ lên mép dưới ảnh */
  .hero { display: block; justify-items: normal; min-height: 0; padding: 0 0 3.5rem; background: var(--beige-light); }
  .hero::before {
    content: ""; display: block; aspect-ratio: 1 / 1.08;
    background: url("images/hero.jpg") 18% center / cover no-repeat, var(--beige);
    -webkit-mask-image: linear-gradient(#000 72%, transparent); mask-image: linear-gradient(#000 72%, transparent);
  }
  .frame { position: relative; width: auto; margin: -5.5rem 1.4rem 0; padding: 2.6rem 1.2rem 2.4rem; outline-offset: 6px; background: rgba(251, 246, 236, .96); backdrop-filter: none; }
  .eyebrow { font-size: 1.3rem; }
  h1 { margin: .6rem 0; }
  .ornament { margin: 1rem 0; }
  .lead { font-size: 1.2rem; line-height: 1.55; margin-bottom: 1.4rem; }
  .scroll { left: 0; right: 0; bottom: .6rem; text-align: center; font-size: 1.6rem; }

  /* Cảm ơn: tương tự phần mở đầu */
  .thanks-section { display: block; justify-items: normal; min-height: 0; padding: 0 1.2rem 5.5rem; background: var(--beige-light); text-align: center; }
  .thanks-section::before {
    content: ""; display: block; margin: 0 -1.2rem; aspect-ratio: 4 / 3.3;
    background: url("images/thanks.jpg") center top / cover no-repeat, var(--beige);
    -webkit-mask-image: linear-gradient(#000 80%, transparent); mask-image: linear-gradient(#000 80%, transparent);
  }
  .thanks-box { display: inline-block; margin-top: -2.2rem; padding: 1rem 2.4rem; position: relative; }
  footer { margin-top: 2rem; }

  /* Hành trình: đường kẻ dọc bên trái thay cho đường giữa */
  .timeline { gap: 2.6rem; padding-left: 1.4rem; }
  .timeline::before { left: 4px; }
  .timeline.scrub::after { left: 4px; }
  .scrub .photo { transform: translateY(calc((1 - var(--p, 1)) * 70px)) scale(calc(.92 + var(--p, 1) * .08)); }
  .scrub .text { transform: translateY(calc((1 - var(--p, 1)) * 40px)); }
  .card::after { display: block; left: calc(-1.4rem + 4px); top: 0; transform: translate(-50%, 0); width: 11px; height: 11px; }
  .text h3 { font-size: 1.4rem; }
  .text p { font-size: .95rem; }
  .photo { outline-offset: 4px; }

  /* Tiệc cưới */
  .tabs { width: 100%; max-width: 360px; }
  .tab { flex: 1; padding: .8rem .5rem; }
  .info .btn { display: block; text-align: center; padding-inline: 1rem; }
  .row span { font-size: 1.15rem; }

  /* Nút mừng cưới gọn hơn */
  .fab { right: .9rem; bottom: .9rem; padding: .65rem 1rem; font-size: .8rem; }
  .title { line-height: 1.3; }
  .subtitle { font-size: 1.15rem; margin-bottom: 2.4rem; padding-inline: .5rem; }
  .card { grid-template-columns: 1fr; gap: 1.2rem; }
  .card:nth-child(even) .photo { order: 0; }
  .card:nth-child(even) .text { text-align: left; }
  .venue-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; row-gap: 2rem; }
  .steps::before { display: none; }
  .section { padding: 4.5rem 1.2rem; }
  .js .reveal.from-left:not(.in), .js .reveal.from-right:not(.in) { transform: translateY(28px); }
}
@media (max-width: 900px) { .gallery { gap: 1rem; } .shot { margin-bottom: 1rem; } }
@media (max-width: 560px) {
  .album.section { padding-inline: .8rem; }
  .gallery { gap: .6rem; }
  .shot { margin-bottom: .6rem; }
  .shot button { border-width: 3px; box-shadow: 0 4px 14px rgba(85, 18, 28, .12); }
}
@media (max-width: 560px) { .lightbox { grid-template-columns: 1fr; } .lb-nav { position: absolute; bottom: 1rem; z-index: 2; } .lb-nav.prev { left: 1rem; } .lb-nav.next { right: 1rem; } .lb-stage img { max-height: 76vh; } }
/* Mừng cưới: điện thoại luôn xếp QR theo chiều dọc */
@media (max-width: 760px) {
  .qr-grid { grid-template-columns: 1fr; gap: 2rem; justify-items: center; }
  .qr-grid figure { width: 100%; max-width: 300px; }
}
@media (max-width: 380px) { .nav { gap: .6rem; padding-inline: .7rem; } .nav a { font-size: .62rem; letter-spacing: .04em; } }