:root {
  --g900: #1f3d2b;
  --g700: #2f5d43;
  --g500: #5b8c6a;
  --g200: #cfe1d3;
  --g100: #e8f0ea;
  --cream: #f7f5ee;
  --gold: #b8974f;
  --ink: #26332b;
  --muted: #5f6f65;
  --serif: "Playfair Display", "Times New Roman", serif;
  --script: "Dancing Script", "Brush Script MT", cursive;
  --sans: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font: 300 16px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
}
body.locked { overflow: hidden; }
img { max-width: 100%; display: block; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; margin: 0; color: var(--g900); }
p { margin: 0; }
a { color: var(--g700); }

.btn {
  display: inline-block;
  padding: .75em 2em;
  border: 1px solid var(--g700);
  border-radius: 999px;
  background: var(--g700);
  color: #fff;
  font: 400 .95rem var(--sans);
  letter-spacing: .04em;
  text-decoration: none;
  cursor: pointer;
  transition: background .2s, color .2s, transform .2s;
}
.btn:hover { background: var(--g900); transform: translateY(-1px); }
.btn.ghost { background: transparent; color: var(--g700); }
.btn.ghost:hover { background: var(--g700); color: #fff; }
.btn.small { padding: .45em 1.2em; font-size: .85rem; }

/* ---------- Cover ---------- */
.cover {
  position: fixed; inset: 0; z-index: 50;
  display: grid; place-items: center;
  padding: 24px;
  background: radial-gradient(ellipse at 50% 40%, #fff 0%, var(--g100) 70%, var(--g200) 100%);
  text-align: center;
  transition: transform 1s cubic-bezier(.7, 0, .2, 1), opacity 1s;
}
.cover.open { transform: translateY(-100%); opacity: 0; pointer-events: none; }
.cover-inner { position: relative; z-index: 2; max-width: 520px; }
.cover-kicker { font-size: .8rem; letter-spacing: .3em; text-transform: uppercase; color: var(--muted); }
.cover-names { font: 700 clamp(2.6rem, 11vw, 4.4rem)/1.15 var(--script); color: var(--g700); margin: .3em 0; }
.cover-names .amp { display: block; font-size: .6em; color: var(--gold); }
.cover-date { font: 400 1.05rem var(--serif); letter-spacing: .08em; color: var(--g900); }
.cover-date small { display: block; font: 300 .85rem var(--sans); color: var(--muted); letter-spacing: .05em; margin-top: .2em; }
.cover-guest { margin: 2rem 0 1.6rem; }
.cover-guest-name { font: 600 1.35rem var(--serif); color: var(--g900); }
.cover-text { font-style: italic; color: var(--muted); margin-top: .3rem; }

/* Cả bìa là vùng bấm — trên điện thoại khỏi phải nhắm nút */
.cover { cursor: pointer; -webkit-tap-highlight-color: transparent; }
#open-btn {
  min-width: 220px; padding: 1.05em 3em;
  font-size: 1.1rem; letter-spacing: .06em;
  box-shadow: 0 8px 22px rgba(31, 61, 43, .28);
  animation: pulse 2.8s ease-in-out infinite;
}
#open-btn:active { transform: scale(.97); }
@keyframes pulse {
  0%, 100% { box-shadow: 0 8px 22px rgba(31, 61, 43, .28); }
  50% { box-shadow: 0 8px 22px rgba(31, 61, 43, .28), 0 0 0 12px rgba(91, 140, 106, .12); }
}

.leaf { position: absolute; width: min(60vw, 380px); pointer-events: none; transform-origin: top left; animation: sway 7s ease-in-out infinite; }
.leaf-tl { top: -10px; left: -10px; }
.leaf-tr { top: -10px; right: -10px; transform: scaleX(-1); transform-origin: top right; animation-name: sway-r; }
.leaf-br { bottom: -10px; right: -10px; width: min(48vw, 300px); transform: rotate(180deg); transform-origin: center; animation: none; opacity: .9; }
@keyframes sway { 0%, 100% { transform: rotate(0); } 50% { transform: rotate(2.5deg); } }
@keyframes sway-r { 0%, 100% { transform: scaleX(-1) rotate(0); } 50% { transform: scaleX(-1) rotate(2.5deg); } }

/* ---------- Menu dưới đáy ---------- */
:root { --navh: 62px; }
body { padding-bottom: calc(var(--navh) + env(safe-area-inset-bottom, 0px)); }
body.locked { padding-bottom: 0; }

.navbar {
  position: fixed; inset: auto 0 0 0; z-index: 60;
  display: flex; justify-content: center; gap: 4px;
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom, 0px));
  background: rgba(247, 245, 238, .94); backdrop-filter: blur(10px);
  border-top: 1px solid var(--g200);
  box-shadow: 0 -4px 18px rgba(31, 61, 43, .08);
  overflow-x: auto; scrollbar-width: none;
  transform: translateY(100%); transition: transform .5s cubic-bezier(.2, .8, .3, 1);
}
.navbar::-webkit-scrollbar { display: none; }
body:not(.locked) .navbar { transform: none; }

.navbar a {
  flex: 0 0 auto; display: flex; flex-direction: column; align-items: center; gap: 3px;
  min-width: 62px; padding: .35em .7em; border-radius: 12px;
  color: var(--muted); text-decoration: none;
  font-size: .72rem; letter-spacing: .02em; white-space: nowrap; text-align: center;
  transition: background .2s, color .2s;
}
.navbar a .ico { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.6; }
.navbar a:hover { color: var(--g700); }
.navbar a.active { background: var(--g100); color: var(--g700); font-weight: 500; }

/* Nút ngôn ngữ / nhạc nổi góc trên phải */
.controls { position: fixed; top: calc(10px + env(safe-area-inset-top, 0px)); right: 12px; z-index: 70; display: flex; gap: 8px; }
.lang-toggle, .music-toggle {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--g500); background: rgba(255, 255, 255, .85);
  color: var(--g700); font: 500 .8rem var(--sans); cursor: pointer;
  backdrop-filter: blur(4px);
}
.music-toggle { font-size: 1.1rem; }
section[id] { scroll-margin-top: 12px; }
@media (min-width: 721px) {
  .navbar { gap: 8px; padding-inline: 20px; }
}
.music-toggle.playing { background: var(--g700); color: #fff; animation: spin 4s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Sections ---------- */
section.block { padding: 72px 20px; }
section.block:nth-of-type(even) { background: #fff; }
.wrap { max-width: 960px; margin: 0 auto; text-align: center; }
.eyebrow { font-size: .75rem; letter-spacing: .32em; text-transform: uppercase; color: var(--gold); margin-bottom: .6rem; }
.title { font-size: clamp(1.7rem, 5vw, 2.4rem); margin-bottom: 1rem; }
.divider { width: 64px; height: 1px; background: var(--gold); margin: 1.2rem auto 1.6rem; }

.hero { min-height: 100svh; display: grid; place-items: center; padding: 80px 20px; position: relative; overflow: hidden;
  background: linear-gradient(180deg, var(--g100), var(--cream)); }
.hero .leaf-deco { position: absolute; width: min(50vw, 320px); opacity: .55; pointer-events: none; }
.hero .leaf-deco.a { top: -20px; left: -20px; }
.hero .leaf-deco.b { bottom: -20px; right: -20px; transform: rotate(180deg); }
.hero-names { font: 700 clamp(3rem, 13vw, 6rem)/1.1 var(--script); color: var(--g700); margin: .2em 0; }
.hero-names .amp { display: block; font-size: .5em; color: var(--gold); }
.hero-date { font: 400 1.2rem var(--serif); letter-spacing: .1em; }

.invite-text { max-width: 620px; margin: 0 auto; color: var(--muted); }

/* Couple */
.couple { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 40px 24px; margin-top: 2.5rem; }
.person img { width: 200px; height: 260px; object-fit: cover; margin: 0 auto 1.2rem; border-radius: 100px 100px 12px 12px; border: 4px solid #fff; box-shadow: 0 8px 24px rgba(31, 61, 43, .18); }
.person .role { font-size: .75rem; letter-spacing: .25em; text-transform: uppercase; color: var(--gold); }
.person h3 { font: 700 2rem var(--script); color: var(--g700); margin: .15em 0 .1em; }
.person .full { font: 400 1rem var(--serif); }
.person .parents { margin-top: .8rem; color: var(--muted); font-size: .92rem; }

/* Timeline kiểu tuyến đường trên bản đồ: ghim so le hai bên, đường uốn nối giữa */
.story-head { margin-top: 4.5rem; }
.tl-map { position: relative; margin-top: 1.8rem; }

.tl-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }
.tl-road, .tl-dash, .tl-tail, .tl-tail-dash { fill: none; stroke-linecap: round; stroke-linejoin: round; }
.tl-road { stroke: var(--g200); stroke-width: 7; }
.tl-dash { stroke: var(--g500); stroke-width: 2; stroke-dasharray: 1 9; opacity: 0; transition: opacity .7s ease .8s; }
/* Con đường tự vẽ ra khi cuộn tới (--len do app.js tính) */
.tl-road { stroke-dasharray: var(--len, 4000); stroke-dashoffset: var(--len, 4000); transition: stroke-dashoffset 1.8s cubic-bezier(.4, 0, .2, 1); }
.tl-map.in .tl-road { stroke-dashoffset: 0; }
.tl-map.in .tl-dash { opacity: .9; }

/* Đuôi đường: đi tiếp rồi nhạt dần — chặng đường chưa kết thúc */
.s-road { stop-color: var(--g200); }
.s-dash { stop-color: var(--g500); }
.tl-tail { stroke: url(#tlFadeRoad); stroke-width: 7; }
.tl-tail-dash { stroke: url(#tlFadeDash); stroke-width: 2; stroke-dasharray: 1 9; }
.tl-tail, .tl-tail-dash { opacity: 0; transition: opacity .9s ease 1.5s; }
.tl-map.in .tl-tail, .tl-map.in .tl-tail-dash { opacity: 1; }

.tl-more { position: relative; z-index: 1; text-align: center; padding-top: 2.4rem; opacity: 0; transition: opacity .8s ease 1.9s; }
.tl-map.in .tl-more { opacity: 1; }
.tl-dots { display: flex; justify-content: center; gap: 9px; margin-bottom: .9rem; }
.tl-dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--g500); animation: breathe 2.4s ease-in-out infinite; }
.tl-dots i:nth-child(2) { animation-delay: .3s; opacity: .7; }
.tl-dots i:nth-child(3) { animation-delay: .6s; opacity: .45; }
@keyframes breathe { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.5); } }
.tl-more p { font: italic 400 1.05rem var(--serif); color: var(--muted); }

.tl { position: relative; z-index: 1; list-style: none; margin: 0; padding: 0; }
/* Mốc chỉ mờ dần, không dịch chuyển — để ghim luôn khớp với con đường đã vẽ */
.tl-item.rv { transform: none; }
.tl-item { position: relative; width: 100%; padding-bottom: 3rem; }
.tl-item:last-child { padding-bottom: 2.4rem; }
.tl-item:nth-child(odd) { padding-left: 54px; text-align: left; }
.tl-item:nth-child(even) { padding-right: 54px; text-align: right; margin-left: auto; }

/* Ghim bản đồ: hình giọt nước, mũi chúc xuống — đường đi xuyên qua mũi ghim */
.tl-pin {
  position: absolute; top: 2px; width: 34px; height: 34px;
  border-radius: 50% 50% 50% 0; transform: rotate(-45deg);
  background: var(--g700); border: 3px solid #fff;
  box-shadow: 0 4px 10px rgba(31, 61, 43, .28);
  display: grid; place-items: center;
}
.tl-item:nth-child(odd) .tl-pin { left: 0; }
.tl-item:nth-child(even) .tl-pin { right: 0; }
.tl-pin b { transform: rotate(45deg); color: #fff; font: 500 .8rem var(--sans); }
.tl-last .tl-pin { background: var(--gold); }

.tl-date { font: 500 .74rem var(--sans); letter-spacing: .18em; text-transform: uppercase; color: var(--gold); }
.tl-card h3 { font: 700 1.6rem/1.2 var(--script); color: var(--g700); margin: .1em 0 .35em; }
.tl-card p { color: var(--muted); font-size: .95rem; }
.tl-card img { width: 100%; max-width: 320px; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 12px; margin-top: .9rem; }
.tl-item:nth-child(even) .tl-card img { margin-left: auto; }

@media (min-width: 760px) {
  .tl-item { width: 66%; padding-bottom: 3.6rem; }
  .tl-item:nth-child(odd) { padding-left: 62px; }
  .tl-item:nth-child(even) { padding-right: 62px; }
}

/* Countdown */
.count { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 1.5rem; }
.count div { min-width: 76px; padding: 14px 8px; background: var(--g700); color: #fff; border-radius: 12px; }
.count b { display: block; font: 600 1.9rem/1.1 var(--serif); }
.count span { font-size: .7rem; letter-spacing: .15em; text-transform: uppercase; opacity: .85; }

/* Events */
.events { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-top: 2rem; text-align: center; }
.card { background: #fff; border: 1px solid var(--g200); border-radius: 16px; padding: 28px 22px; box-shadow: 0 6px 20px rgba(31, 61, 43, .06); }
section.block:nth-of-type(even) .card { background: var(--cream); }
.card h3 { font-size: 1.4rem; margin-bottom: .5rem; }
.card .when { font: 600 1.05rem var(--serif); color: var(--g700); }
.card .lunar { font-size: .85rem; color: var(--muted); font-style: italic; }
.card .venue { margin-top: .9rem; font-weight: 500; }
.card .addr { color: var(--muted); font-size: .92rem; margin-bottom: 1rem; }
.map { margin-top: 1rem; border: 0; width: 100%; height: 220px; border-radius: 10px; }

/* Gallery */
.slider { --sw: min(78vw, 340px); position: relative; margin-top: 2rem; }
.track {
  position: relative; display: flex; gap: 14px;
  padding: 8px calc(50% - var(--sw) / 2) 18px;
  overflow-x: auto; scroll-snap-type: x mandatory; overscroll-behavior-x: contain;
  scrollbar-width: none; -webkit-overflow-scrolling: touch; cursor: grab;
}
.track::-webkit-scrollbar { display: none; }
.track.dragging { scroll-snap-type: none; cursor: grabbing; }
.slide {
  flex: 0 0 var(--sw); margin: 0; aspect-ratio: 4 / 5; scroll-snap-align: center;
  border-radius: 14px; overflow: hidden; box-shadow: 0 8px 22px rgba(31, 61, 43, .18);
  opacity: .5; transform: scale(.92); transition: opacity .35s, transform .35s;
}
.slide.active { opacity: 1; transform: none; }
.slide img { width: 100%; height: 100%; object-fit: cover; cursor: zoom-in; user-select: none; -webkit-user-drag: none; }
.sl-nav {
  position: absolute; top: calc(50% - 26px); z-index: 2;
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--g200);
  background: rgba(255, 255, 255, .9); color: var(--g700); font-size: 1.6rem; line-height: 1; cursor: pointer;
}
.sl-prev { left: 0; } .sl-next { right: 0; }
.sl-nav:disabled { opacity: .35; cursor: default; }
.dots { display: flex; justify-content: center; gap: 8px; }
.dots button { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 99px; background: var(--g200); cursor: pointer; transition: width .25s, background .25s; }
.dots button.active { width: 22px; background: var(--g700); }

/* Gifts */
.gifts { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; margin-top: 2rem; max-width: 720px; margin-inline: auto; }
.gift img { width: 170px; margin: 0 auto 1rem; border-radius: 8px; }
.gift .acc { font: 600 1.4rem var(--serif); letter-spacing: .06em; color: var(--g700); margin: .3rem 0 .8rem; }
.gift .who { font: 500 .8rem var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--gold); }
.gift .bank { color: var(--muted); font-size: .92rem; }
.contacts { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 2rem; }

/* Thanks */
section.block.thanks { background: linear-gradient(180deg, var(--cream), var(--g200)); }
.thanks .script { font: 700 clamp(2rem, 7vw, 3rem) var(--script); color: var(--g700); }

/* Lightbox */
.lightbox { position: fixed; inset: 0; z-index: 100; background: rgba(15, 30, 22, .92); display: grid; place-items: center; }
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 92vw; max-height: 88vh; border-radius: 8px; }
.lb-close, .lb-nav { position: absolute; background: none; border: 0; color: #fff; font-size: 2.6rem; cursor: pointer; padding: 10px 16px; line-height: 1; }
.lb-close { top: 8px; right: 12px; }
.lb-prev { left: 4px; } .lb-next { right: 4px; }
.lb-nav { top: 50%; transform: translateY(-50%); }

/* Hiện dần khi cuộn tới — nhẹ, không giật */
.rv {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .75s cubic-bezier(.22, .61, .36, 1) var(--d, 0ms),
              transform .75s cubic-bezier(.22, .61, .36, 1) var(--d, 0ms);
}
.rv-zoom { transform: translateY(16px) scale(.975); }
.rv.in { opacity: 1; transform: none; }
/* Khi bìa chưa mở: giữ nguyên trạng thái ẩn để mở xong mới bay vào */
body.locked #app .rv { opacity: 0; transform: translateY(20px); transition: none; }

.toast { position: fixed; left: 50%; bottom: calc(var(--navh) + 20px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); background: var(--g900); color: #fff; padding: .6em 1.4em; border-radius: 999px; font-size: .9rem; z-index: 120; }

@media (prefers-reduced-motion: reduce) {
  .leaf, .music-toggle.playing { animation: none; }
  .rv, .rv-zoom, body.locked #app .rv { opacity: 1; transform: none; transition: none; }
  .slide { opacity: 1; transform: none; transition: none; }
  .track { scroll-behavior: auto; }
  .tl-road { stroke-dashoffset: 0; transition: none; }
  .tl-dash, .tl-tail, .tl-tail-dash, .tl-more { opacity: .9; transition: none; }
  .tl-dots i { animation: none; }
  #open-btn { animation: none; }
  .cover { transition: none; }
  html { scroll-behavior: auto; }
}