/* ==========================================================================
   ZSketch — shared site styles (index.html + mau-thiep.html)
   Palette: warm paper · graphite ink · champagne hairlines · deep wine accent
   ========================================================================== */
:root {
  --paper: #f5f0e8;
  --paper-2: #ede6da;
  --paper-3: #e4dbcb;
  --card: #fbf8f2;
  --ink: #1c1916;
  --ink-2: #4b443d;
  --mute: #776d63;
  --line: rgba(28, 25, 22, .16);
  --line-2: rgba(28, 25, 22, .08);
  --champ: #9c7b4b;
  --wine: #6d1f2e;
  --band: #4f1520;
  --band-ink: #f3eadf;
  --band-mute: rgba(243, 234, 223, .66);
  --band-line: rgba(243, 234, 223, .22);
  --bezel: #151311;
  --glass: rgba(245, 240, 232, .84);
  --shade: 40, 28, 18;
  --grain: .05;
  --f-disp: "Noto Serif Display", "Playfair Display", Georgia, "Times New Roman", serif;
  --f-body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --ease-io: cubic-bezier(.7, 0, .2, 1);
  --gut: 20px;
  --hh: 64px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f0d0c; --paper-2: #161311; --paper-3: #1e1a17; --card: #1a1715;
    --ink: #efe7db; --ink-2: #c3b8aa; --mute: #958a7e; --line: rgba(239, 231, 219, .16); --line-2: rgba(239, 231, 219, .08);
    --champ: #cbae7c; --wine: #d3a19f; --band: #2a0c13; --band-ink: #f1e7da; --band-mute: rgba(241, 231, 218, .62);
    --band-line: rgba(241, 231, 218, .18); --bezel: #050404; --glass: rgba(15, 13, 12, .82); --shade: 0, 0, 0; --grain: .07;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0f0d0c; --paper-2: #161311; --paper-3: #1e1a17; --card: #1a1715;
  --ink: #efe7db; --ink-2: #c3b8aa; --mute: #958a7e; --line: rgba(239, 231, 219, .16); --line-2: rgba(239, 231, 219, .08);
  --champ: #cbae7c; --wine: #d3a19f; --band: #2a0c13; --band-ink: #f1e7da; --band-mute: rgba(241, 231, 218, .62);
  --band-line: rgba(241, 231, 218, .18); --bezel: #050404; --glass: rgba(15, 13, 12, .82); --shade: 0, 0, 0; --grain: .07;
  color-scheme: dark;
}
@media (min-width: 768px) { :root { --gut: 40px; --hh: 72px; } }
@media (min-width: 1200px) { :root { --gut: 64px; --hh: 84px; } }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--hh) + 12px); }
body {
  margin: 0; min-height: 100vh; background: var(--paper); color: var(--ink);
  font: 300 16px/1.7 var(--f-body); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden; text-rendering: optimizeLegibility;
}
@supports (overflow: clip) { body { overflow-x: clip; } }
/* paper grain — a single fixed, non-interactive layer */
body::after {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 90; opacity: var(--grain);
  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' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .5 0 0 0 0 .4 0 0 0 0 .3 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}
img, svg, iframe { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
::selection { background: var(--wine); color: var(--paper); }
:focus-visible { outline: 1px solid var(--champ); outline-offset: 4px; }
[hidden] { display: none !important; }
.sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap {
  width: 100%; max-width: 1440px; margin-inline: auto;
  padding-left: max(var(--gut), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gut), env(safe-area-inset-right, 0px));
}

/* ---------- Type ---------- */
.label {
  display: inline-flex; align-items: center; gap: 14px;
  font: 500 11px/1.4 var(--f-body); letter-spacing: .26em; text-transform: uppercase; color: var(--champ);
}
.label::before { content: ""; width: 28px; height: 1px; background: currentColor; opacity: .7; }
.label.plain::before { display: none; }
.h2 {
  font: 300 clamp(36px, 8.6vw, 48px)/1.12 var(--f-disp); letter-spacing: -.015em; margin: 18px 0 0; text-wrap: balance;
}
.h2 em, .h-hero em, .q em { font-style: italic; color: var(--wine); }
@media (min-width: 768px) { .h2 { font-size: clamp(46px, 5.4vw, 76px); line-height: 1.08; } }
.lede { color: var(--ink-2); font-size: 16px; line-height: 1.75; max-width: 34em; text-wrap: pretty; margin: 22px 0 0; }
@media (min-width: 1200px) { .lede { font-size: 17px; } }

/* ---------- Buttons ---------- */
.btn {
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 14px;
  min-height: 52px; padding: 0 26px; border: 1px solid var(--ink); background: transparent; color: var(--ink);
  font: 500 11.5px/1.2 var(--f-body); letter-spacing: .22em; text-transform: uppercase; text-decoration: none;
  white-space: nowrap; word-spacing: -.14em; transition: color .6s var(--ease), border-color .6s var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.btn::before {
  content: ""; position: absolute; inset: -1px; z-index: -1; background: var(--ink);
  transform: scaleY(0); transform-origin: 50% 100%; transition: transform .7s var(--ease);
}
.btn:hover { color: var(--paper); }
.btn:hover::before { transform: scaleY(1); }
.btn.solid { background: var(--ink); color: var(--paper); }
.btn.solid::before { background: var(--wine); }
.btn.solid:hover { border-color: var(--wine); color: #fff; }
:root[data-theme="dark"] .btn.solid:hover { color: #1a0a0e; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.solid:hover { color: #1a0a0e; } }
.btn .arr { width: 22px; height: 10px; flex: none; transition: transform .7s var(--ease); }
.btn:hover .arr { transform: translateX(5px); }
.btn.sm { min-height: 42px; padding: 0 18px; font-size: 10.5px; gap: 10px; }
.btn:active { transform: translateY(1px); }

.lnk {
  position: relative; display: inline-flex; align-items: center; gap: 12px; min-height: 44px;
  font: 500 11.5px/1.2 var(--f-body); letter-spacing: .22em; text-transform: uppercase; text-decoration: none; color: var(--ink);
  background: none; border: 0; padding: 0;
}
.lnk span { background: linear-gradient(currentColor, currentColor) 0 100% / 100% 1px no-repeat; padding-bottom: 5px; transition: background-size .7s var(--ease); }
.lnk:hover span { background-size: 0 1px; background-position: 100% 100%; }
.lnk .arr { width: 22px; height: 10px; transition: transform .7s var(--ease); }
.lnk:hover .arr { transform: translateX(5px); }

/* ---------- Header ---------- */
.hdr {
  position: fixed; inset: 0 0 auto; z-index: 60; padding-top: env(safe-area-inset-top, 0px);
  transition: background-color .6s var(--ease), box-shadow .6s var(--ease), backdrop-filter .6s;
}
.hdr .wrap { height: var(--hh); display: flex; align-items: center; gap: 20px; }
.hdr.solid {
  background: var(--glass); box-shadow: 0 1px 0 var(--line-2);
  -webkit-backdrop-filter: blur(18px) saturate(1.15); backdrop-filter: blur(18px) saturate(1.15);
}
/* compact on scroll — transform only: the bar lifts, its content re-centres */
.hdr, .hdr .wrap > * { transition: transform .7s var(--ease); }
.hdr { transition: transform .7s var(--ease), background-color .6s var(--ease), box-shadow .6s var(--ease); }
@media (min-width: 768px) {
  .hdr.solid { transform: translateY(-12px); }
  .hdr.solid .wrap > * { transform: translateY(6px); }
}
.logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); margin-right: auto; min-height: 44px; }
.logo svg { width: 38px; height: 38px; flex: none; }
.logo .wm { font: 400 15px/1 var(--f-disp); letter-spacing: .34em; text-transform: uppercase; padding-top: 2px; margin-right: -.34em; }
.zr { stroke: var(--champ); }
.zz { stroke: currentColor; }
.nav { display: none; gap: clamp(22px, 2.6vw, 40px); }
.nav a {
  position: relative; font: 400 11.5px/1 var(--f-body); letter-spacing: .2em; text-transform: uppercase; text-decoration: none;
  color: var(--ink-2); padding: 14px 0; transition: color .4s;
}
.nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 8px; height: 1px; background: var(--champ); transform: scaleX(0); transform-origin: right; transition: transform .6s var(--ease); }
.nav a:hover, .nav a[aria-current] { color: var(--ink); }
.nav a:hover::after, .nav a[aria-current]::after { transform: scaleX(1); transform-origin: left; }
.hdr-cta { display: none; }
.icon-btn {
  width: 44px; height: 44px; display: grid; place-items: center; border: 0; background: none; color: var(--ink); padding: 0; flex: none;
  -webkit-tap-highlight-color: transparent;
}
.icon-btn svg { width: 20px; height: 20px; }
.theme-btn .moon { display: none; }
:root[data-theme="dark"] .theme-btn .sun { display: none; }
:root[data-theme="dark"] .theme-btn .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-btn .sun { display: none; }
  :root:not([data-theme="light"]) .theme-btn .moon { display: block; }
}
.menu-btn { position: relative; }
.menu-btn i { position: absolute; left: 11px; right: 11px; height: 1px; background: currentColor; transition: transform .6s var(--ease), top .6s var(--ease); }
.menu-btn i:first-child { top: 18px; }
.menu-btn i:last-child { top: 25px; }
.menu-open .menu-btn i:first-child { top: 22px; transform: rotate(45deg); }
.menu-open .menu-btn i:last-child { top: 22px; transform: rotate(-45deg); }
@media (min-width: 640px) { .hdr-cta { display: inline-flex; } }
@media (min-width: 1024px) { .nav { display: flex; } .menu-btn { display: none; } .logo { margin-right: 0; } .nav { margin-left: auto; margin-right: 12px; } }

/* full-screen menu (mobile / tablet) */
.menu {
  position: fixed; inset: 0; z-index: 55; background: var(--paper); display: flex; flex-direction: column;
  padding: calc(var(--hh) + env(safe-area-inset-top, 0px) + 24px) max(var(--gut), env(safe-area-inset-right, 0px)) calc(28px + env(safe-area-inset-bottom, 0px)) max(var(--gut), env(safe-area-inset-left, 0px));
  height: 100vh; height: 100dvh; overscroll-behavior: contain;
  transform: translateY(-100%); visibility: hidden; transition: transform .9s var(--ease-io), visibility 0s .9s; overflow-y: auto;
}
.menu-open .menu { transform: none; visibility: visible; transition: transform .9s var(--ease-io); }
.menu ol { list-style: none; margin: 0; padding: 0; counter-reset: m; }
.menu li { border-bottom: 1px solid var(--line-2); overflow: hidden; }
.menu li a {
  display: flex; align-items: baseline; gap: 18px; padding: 16px 0; text-decoration: none;
  font: 300 clamp(32px, 9vw, 52px)/1.15 var(--f-disp); letter-spacing: -.01em;
  transform: translateY(100%); transition: transform .9s var(--ease);
}
.menu li a::before { counter-increment: m; content: "0" counter(m); font: 400 11px/1 var(--f-body); letter-spacing: .2em; color: var(--champ); min-width: 2.2em; transform: translateY(-1.1em); }
.menu-open .menu li a { transform: none; }
.menu-open .menu li:nth-child(2) a { transition-delay: .06s; }
.menu-open .menu li:nth-child(3) a { transition-delay: .12s; }
.menu-open .menu li:nth-child(4) a { transition-delay: .18s; }
.menu-open .menu li:nth-child(5) a { transition-delay: .24s; }
.menu-foot { margin-top: auto; padding-top: 32px; display: grid; gap: 22px; }
.menu-foot .btn { width: 100%; }
.menu-foot p { margin: 0; font: italic 300 18px/1.4 var(--f-disp); color: var(--mute); }
.menu-open { overflow: hidden; }
@media (min-width: 1024px) { .menu { display: none; } }

/* ---------- Phone mockup ---------- */
.phone {
  position: relative; display: block; padding: 3.4%; border-radius: 15% / 7.1%; background: var(--bezel);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, .08),
    0 0 0 1px rgba(var(--shade), .06),
    0 60px 80px -50px rgba(var(--shade), .55),
    0 26px 36px -28px rgba(var(--shade), .4);
  text-decoration: none; color: inherit; -webkit-tap-highlight-color: transparent;
}
:root[data-theme="dark"] .phone { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06), 0 0 0 1px rgba(203, 174, 124, .16), 0 50px 70px -40px #000; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .phone { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06), 0 0 0 1px rgba(203, 174, 124, .16), 0 50px 70px -40px #000; } }
.scr {
  position: relative; display: block; aspect-ratio: 390 / 844; border-radius: 12% / 5.6%; overflow: hidden; isolation: isolate;
  background: linear-gradient(162deg, var(--c1, #6d1f2e), var(--c2, #cbae7c)); container-type: inline-size; transform: translateZ(0);
}
@supports not (aspect-ratio: 1) { .scr { height: 0; padding-top: 216.4%; } }
.scr::after {
  content: ""; position: absolute; z-index: 6; top: 2.4%; left: 50%; width: 29%; height: 3.3%; transform: translateX(-50%);
  border-radius: 99px; background: var(--bezel);
}
.scr > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top; opacity: 0; transition: opacity .9s ease, transform 1.6s var(--ease); z-index: 3; }
.scr > img.ok { opacity: 1; }
.scr iframe {
  position: absolute; top: 0; left: 0; z-index: 4; width: 390px; height: 844px; max-width: none; border: 0;
  transform-origin: 0 0; transform: scale(var(--s, 1)); background: transparent; opacity: 0; transition: opacity 1.2s ease;
}
.scr iframe.ok { opacity: 1; }
/* elegant placeholder: a miniature invitation card */
.ph {
  position: absolute; inset: 0; z-index: 1; display: flex; flex-direction: column; align-items: center; justify-content: space-between; text-align: center;
  padding: 19% 10% 13%; color: var(--tc, #fff); text-shadow: var(--ts, none);
}
.ph::before {
  content: ""; position: absolute; inset: 5.5%; top: 9%; border: 1px solid currentColor; opacity: .32; border-radius: 6% / 2.8%;
}
.ph::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(120% 60% at 20% 0%, rgba(255, 255, 255, .22), transparent 60%), radial-gradient(90% 50% at 100% 100%, rgba(0, 0, 0, .18), transparent 70%);
}
.ph .no { font: 500 10px/1 var(--f-body); font-size: clamp(7px, 3.6cqw, 11px); letter-spacing: .32em; opacity: .85; }
.ph .nm { font: 300 italic 26px/1.08 var(--f-disp); font-size: clamp(16px, 13cqw, 46px); letter-spacing: -.01em; text-wrap: balance; }
.ph .nm::after { content: ""; display: block; width: 18%; height: 1px; margin: 9% auto 0; background: currentColor; opacity: .55; }
.ph .en { display: block; font: 400 9px/1.3 var(--f-body); font-size: clamp(6.5px, 3.3cqw, 10px); letter-spacing: .26em; text-transform: uppercase; opacity: .8; margin-top: 7%; }
.ph .zs { font: 400 9px/1 var(--f-disp); font-size: clamp(6px, 3.2cqw, 10px); letter-spacing: .5em; text-transform: uppercase; opacity: .7; margin-right: -.5em; }

/* ---------- Footer ---------- */
.ftr { position: relative; padding-top: clamp(72px, 10vw, 140px); padding-bottom: calc(36px + env(safe-area-inset-bottom, 0px)); border-top: 1px solid var(--line-2); overflow: hidden; }
.ftr-top { display: grid; gap: 40px; }
.ftr-tag { font: 300 clamp(28px, 6vw, 44px)/1.2 var(--f-disp); margin: 0; max-width: 14em; text-wrap: balance; }
.ftr-tag em { font-style: italic; color: var(--wine); }
.ftr-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 24px; align-content: start; }
.ftr-nav a { font: 400 11.5px/1 var(--f-body); letter-spacing: .2em; text-transform: uppercase; text-decoration: none; color: var(--ink-2); padding: 14px 0; border-bottom: 1px solid var(--line-2); }
.ftr-nav a:hover { color: var(--ink); }
.ftr-word {
  display: flex; align-items: center; justify-content: space-between; gap: 3vw; margin: clamp(56px, 8vw, 110px) 0 0;
  font: 300 clamp(56px, 17.4vw, 290px)/.9 var(--f-disp); letter-spacing: -.035em; color: var(--ink); white-space: nowrap;
}
.ftr-word svg { width: .82em; height: .82em; flex: none; }
.ftr-base {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; margin-top: clamp(28px, 4vw, 48px); padding-top: 22px; border-top: 1px solid var(--line-2);
  font: 400 11px/1.6 var(--f-body); letter-spacing: .18em; text-transform: uppercase; color: var(--mute);
}
@media (min-width: 900px) {
  .ftr-top { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); align-items: end; }
  .ftr-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom, 0px)); z-index: 120; transform: translate(-50%, 20px); opacity: 0;
  background: var(--ink); color: var(--paper); padding: 14px 22px; max-width: calc(100vw - 32px); text-align: center;
  font: 400 13px/1.45 var(--f-body); letter-spacing: .02em; pointer-events: none; transition: opacity .5s var(--ease), transform .7s var(--ease);
}
.toast.on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Motion primitives ---------- */
.js [data-rv] { opacity: 0; transform: translateY(26px); transition: opacity 1.3s var(--ease), transform 1.5s var(--ease); transition-delay: var(--d, 0s); }
.js [data-rv].in { opacity: 1; transform: none; }
.js .draw path, .js .draw use { stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset var(--dur, 2.2s) var(--ease-io); transition-delay: var(--d, 0s); }
.js .draw.in path, .js .draw.in use { stroke-dashoffset: 0; }

/* ---------- Intro (first visit per session) ---------- */
.intro { display: none; }
.js.intro-on .intro {
  position: fixed; inset: 0; height: 100vh; height: 100dvh; overscroll-behavior: contain; z-index: 200; display: grid; place-items: center; background: var(--paper); color: var(--ink);
  animation: introOut 1.1s var(--ease-io) 2.55s both; cursor: pointer;
}
.intro-in { display: grid; justify-items: center; gap: 26px; }
.intro svg { width: clamp(120px, 26vmin, 200px); height: auto; overflow: visible; }
.intro .zr, .intro .zz { stroke-dasharray: 1; stroke-dashoffset: 1; }
.intro .zz { stroke-width: 1.6; animation: draw 1.6s var(--ease-io) .25s forwards; }
.intro .zr { stroke-width: .7; animation: draw 1.4s var(--ease-io) 1s forwards; }
.intro .wm { font: 400 13px/1 var(--f-disp); letter-spacing: .6em; margin-right: -.6em; text-transform: uppercase; display: flex; }
.intro .wm span { opacity: 0; animation: fadeUp 1s var(--ease) both; }
.intro .wm span:nth-child(1) { animation-delay: 1.45s; } .intro .wm span:nth-child(2) { animation-delay: 1.52s; }
.intro .wm span:nth-child(3) { animation-delay: 1.59s; } .intro .wm span:nth-child(4) { animation-delay: 1.66s; }
.intro .wm span:nth-child(5) { animation-delay: 1.73s; } .intro .wm span:nth-child(6) { animation-delay: 1.8s; }
.intro .wm span:nth-child(7) { animation-delay: 1.87s; }
.js.intro-on.intro-skip .intro { animation: introOut .7s var(--ease-io) both; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes introOut { from { transform: none; } to { transform: translateY(-100%); visibility: hidden; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0s !important; transition-duration: .01ms !important; transition-delay: 0s !important; }
  .js [data-rv] { opacity: 1; transform: none; }
  .js .draw path, .js .draw use { stroke-dashoffset: 0; }
  .js.intro-on .intro { display: none; }
}
/* short landscape phones: slimmer bar so fixed chrome never takes half the screen */
@media (max-height: 500px) and (orientation: landscape) { :root { --hh: 58px; } .logo svg { width: 32px; height: 32px; } }