: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; }
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: 1; 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 img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
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); }

/* Responsive */
@media (max-width: 760px) {
  .hero, .thanks-section { justify-items: center; padding-inline: 1.5rem; }
  .nav { gap: 1.1rem; }
  .timeline::before, .card::after { display: none; }
  .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; }
}
@media (max-width: 400px) { .qr-grid { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; scroll-behavior: auto !important; } }