/* ============================================================================
   DOSON · Nhã — single-page scroll film
   Structure = Menard EMBELLIR (chaptered) · Motion = MFK Baccarat Rouge 540
   Palette  = icy "Court / Daybreak"
   ========================================================================== */

/* ---------- Sentient · the single DOSON typeface (self-hosted → works file:// + http) --- */
@font-face{font-family:'Sentient';src:url('../assets/fonts/sentient/sentient-variable.woff2') format('woff2'),url('../assets/fonts/sentient/sentient-variable.woff') format('woff');font-weight:200 800;font-style:normal;font-display:swap}
@font-face{font-family:'Sentient';src:url('../assets/fonts/sentient/sentient-variableitalic.woff2') format('woff2'),url('../assets/fonts/sentient/sentient-variableitalic.woff') format('woff');font-weight:200 800;font-style:italic;font-display:swap}

/* ---------- Lenis smooth scroll (the slow inertia, MFK-style) ------------ */
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
.lenis.lenis-smooth [data-lenis-prevent]{overscroll-behavior:contain}
.lenis.lenis-stopped{overflow:hidden}

/* ---------- tokens ------------------------------------------------------- */
:root{
  /* icy palette */
  --snow:#f6fbfc;
  --powder:#bcd8e6;
  --cyan:#86e6e2;
  --ice:#a5f3fc;
  --silver:#d7e6ec;
  --silver-dim:#9fb7c2;
  --glacier:#06202f;
  --glacier-deep:#04141d;
  --ink:#02252f;

  /* type — ONE face for the whole site (nav + S6 included) */
  --font:'Sentient','Didot',Georgia,serif;
  --serif:var(--font);
  --body:var(--font);
  --sans:var(--font);          /* legacy alias kept so old rules need no rename */
  --micro-weight:480;          /* variable weight for tiny labels: hairlines survive */

  /* consistency roles (additive, no refactor) */
  --paper:#f6fbfc;             /* == --snow, named by role (page/footer paper) */
  /* --ink:#02252f already declared above, the dark counterpart */
  --sp-1:8px; --sp-2:14px; --sp-3:22px; --sp-4:38px; --sp-6:64px;

  --gutter:clamp(22px,5vw,80px);
}

/* ---------- reset -------------------------------------------------------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{
  background:#cfe6e8;              /* light icy fallback (video field covers it) */
  color:var(--snow);
  font-family:var(--sans);
  overflow-x:clip;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

/* ---------- global drifting-snow canvas (one light layer over all) ------- */
#flurry{
  position:fixed;inset:0;z-index:6;pointer-events:none;
  /* normal blend so the white sparkle reads on a LIGHT field (screen would hide it) */
}

/* ===== fixed looping video field (the real background) ===== */
.bg-field{position:fixed;inset:0;z-index:0;overflow:hidden;background:#dbeef0}
.bg-field video{width:100%;height:100%;object-fit:cover;display:block}
/* hero sits on the light field: transparent section, dark ink text, teal bloom behind the serum */
#intro{background:transparent}
#intro .veil{display:none}
#intro .hero-wrap{position:absolute;inset:0;z-index:1;transform-origin:center 46%;will-change:transform,opacity}
#intro .hero-figure{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;pointer-events:none}
#intro .hero-dust{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;opacity:0}
#intro .kicker{color:#0e5b61}
#intro .display{color:#083c42;text-shadow:0 2px 34px rgba(255,255,255,.55)}
#intro .func{color:#1a666c}
#intro .scrollcue{color:#0e5b61;opacity:.9}

/* ---- OPENING: hero pinned dead-centre, disintegrates → concept fades in (S1+S2) ---- */
#intro.opening{height:300vh;padding:0;min-height:0}   /* tall so the concept stays LOCKED while S3 rides up over it (stays static so the fixed bg-loop shows through) */
.opening-pin{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;display:grid;place-items:center}
.opening .concept-spark{position:absolute;inset:0;width:100%;height:100%;z-index:3;pointer-events:none}
.opening .concept-spark-top{position:absolute;inset:0;width:100%;height:100%;z-index:5;pointer-events:none}
.opening .concept{position:relative;z-index:4;opacity:0;padding:0 var(--gutter);will-change:opacity}
.opening .concept-img{display:block;width:clamp(340px,52vw,760px);height:auto;margin:0 auto;filter:drop-shadow(0 2px 30px rgba(12,60,86,.35))}
.opening .concept .vn{font-family:var(--serif);font-style:italic;font-weight:400;color:#ffffff;font-size:clamp(40px,6.4vw,110px);line-height:1.08;text-shadow:0 2px 44px rgba(12,60,86,.55)}
.opening .concept .gloss{font-family:var(--body);font-style:italic;font-size:clamp(17px,1.7vw,24px);color:#eaf6ff;margin-top:26px;letter-spacing:.03em;text-shadow:0 1px 24px rgba(12,60,86,.5)}

/* ===== DRAFT: strip every section background so the video field shows through —
        keep ONLY §8 Collection + the footer ===== */
.chapter{background:transparent!important}
.veil{display:none!important}
#stage .stage-veil{display:none!important}
#collection{background:#0a2637!important}
#collection .veil{display:block!important}
/* light field → readable dark ink for the stripped sections */
#concept,#science,#court-intro,#court-skin{color:#143f45}
#concept .vn,#court-intro .nha,#court-skin .statement{color:#08363c}
#concept .gloss,#science p,#science .eyebrow,#court-skin .sub,#science .actives li,#court-intro .line,#court-skin .statement em{color:#245c63}
/* §2 concept — BRIGHT metallic silver headline + DARK silver gloss (pure & clean, no dark bg) */
#concept .vn{
  background:none;color:#4a5559;-webkit-text-fill-color:#4a5559;filter:none;   /* dark graphite silver — the readable end of silver on a light field */
  font-size:clamp(22px,3.3vw,56px);line-height:1.34;padding-bottom:.14em;   /* half size + room for the ạ dot-below */
}
#concept .gloss{color:#566a6e;opacity:1;text-shadow:none;letter-spacing:.05em}
#concept .tp{position:absolute;inset:0;z-index:1;pointer-events:none}

/* ---------- fixed header ------------------------------------------------- */
.site-head{
  position:fixed;top:0;left:0;width:100%;z-index:10;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px var(--gutter);
}
.site-head .logo{display:flex;align-items:center}
.site-head .logo img{height:22px;width:auto;display:block;filter:drop-shadow(0 2px 14px rgba(0,26,38,.4));transition:filter .4s}
.site-head nav a{
  font-family:var(--sans);text-transform:uppercase;font-size:11px;letter-spacing:2.5px;
  margin-left:30px;color:#fff;opacity:.9;transition:opacity .3s,color .4s;
  text-shadow:0 2px 14px rgba(0,26,38,.45);
}
.site-head nav a:hover{opacity:1}
/* over the white footer, flip to glacier ink */
.site-head.on-light nav a{color:var(--glacier);text-shadow:none}
.site-head.on-light .logo img{filter:brightness(0)}
@media(max-width:640px){.site-head nav{display:none}}

/* progress rail */
.scroll-rail{position:fixed;top:0;left:0;height:2px;width:100%;z-index:11;background:transparent}
.scroll-rail i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--ice));box-shadow:0 0 12px var(--cyan)}

/* ============================================================================
   CHAPTER STACK — every chapter is a sticky full-screen panel, so the next
   one slides UP over the pinned previous one (the MFK cover-reveal), for free.
   ========================================================================== */
.chapter{
  position:relative;
  height:100vh;
  overflow:hidden;
  display:flex;align-items:center;
  isolation:isolate;
}
.chapter .veil{position:absolute;inset:0;z-index:-1}          /* the atmosphere */
.chapter .inner{position:relative;z-index:2;width:100%;padding:0 var(--gutter)}

/* reveal primitives (toggled by IntersectionObserver -> .in) */
.rv{opacity:0;transform:translateY(46px);transition:opacity 1.15s cubic-bezier(.16,.7,.3,1),transform 1.15s cubic-bezier(.16,.7,.3,1);transition-delay:var(--d,0s)}
.rv.in{opacity:1;transform:none}
.rv-soft{opacity:0;transition:opacity 1.6s ease;transition-delay:var(--d,0s)}
.rv-soft.in{opacity:1}

/* shared type bits */
.kicker{font-family:var(--sans);font-weight:300;font-size:12px;letter-spacing:.7em;color:var(--ice);text-indent:.7em;margin-bottom:26px}
.display{font-family:var(--serif);font-weight:400;line-height:1.02;color:#fff;font-size:clamp(44px,6vw,104px)}
.func{font-family:var(--sans);font-weight:300;font-size:12px;letter-spacing:.55em;color:var(--silver);margin-top:18px;text-indent:.55em}
.poem{font-family:var(--body);font-style:italic;font-weight:400;font-size:clamp(19px,1.9vw,28px);line-height:1.65;color:var(--ice)}
.eyebrow{font-family:var(--sans);font-size:11px;letter-spacing:.45em;text-transform:uppercase;color:var(--silver-dim);margin-bottom:22px}
.cta{display:inline-block;margin-top:38px;font-family:var(--sans);font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:#fff;border:1px solid rgba(255,255,255,.55);padding:15px 34px;transition:.35s}
.cta:hover{background:#fff;color:var(--glacier)}

.scrollcue{position:absolute;left:50%;bottom:30px;transform:translateX(-50%);z-index:3;font-family:var(--sans);font-size:11px;letter-spacing:.42em;text-transform:uppercase;color:var(--silver);opacity:.75;display:flex;flex-direction:column;align-items:center;gap:10px}
.scrollcue::after{content:"";width:1px;height:38px;background:linear-gradient(var(--silver),transparent);animation:cue 1.9s ease-in-out infinite}
@keyframes cue{0%,100%{transform:scaleY(.4);opacity:.4;transform-origin:top}50%{transform:scaleY(1);opacity:1;transform-origin:top}}

/* a bottle that glows over any gradient (drops its dark photo bg) */
.glow{mix-blend-mode:screen;pointer-events:none;filter:drop-shadow(0 0 60px rgba(134,230,226,.45))}

/* ============================================================================
   §1 · INTRO — the start product (The Sovereign / serum)
   ========================================================================== */
#intro{background:var(--glacier-deep)}
#intro .veil{  /* DAYBREAK — sun-flare high, deep pocket pulled to centre behind the serum */
  background:
    radial-gradient(24% 20% at 50% 15%,rgba(255,255,255,.95),rgba(206,238,248,.5) 46%,transparent 66%),
    radial-gradient(30% 40% at 50% 56%,rgba(6,32,47,.7),rgba(6,32,47,.32) 48%,transparent 72%),
    radial-gradient(19% 27% at 78% 44%,rgba(165,243,252,.5),transparent 60%),
    linear-gradient(176deg,#57b2e6 0%,#93cfec 28%,#c7e7f4 48%,#7db1cf 66%,#23506b 86%,#0c2b3d 100%);
}
#intro .veil::after{  /* slow icy aurora sweep */
  content:"";position:absolute;inset:-20%;
  background:conic-gradient(from 210deg at 50% 55%,transparent 0deg,rgba(134,230,226,.14) 60deg,transparent 150deg,rgba(165,243,252,.12) 250deg,transparent 330deg);
  animation:aurora 26s linear infinite;
}
@keyframes aurora{to{transform:rotate(360deg)}}
#intro .inner{display:grid;place-items:center;text-align:center}
#intro .hero-stack{position:relative;display:flex;flex-direction:column;align-items:center;gap:1.6vh;transform-origin:center 42%;will-change:transform,opacity}
#intro .hero-serum{position:relative;height:54vh;width:auto;z-index:1;filter:drop-shadow(0 20px 70px rgba(134,230,226,.4))}
#intro .display{font-size:clamp(46px,6.4vw,112px)}
#intro .kicker{margin-bottom:6px}
#intro .func{margin-top:6px}

/* ============================================================================
   §2 · CONCEPT — one Vietnamese line: Đồ Lại Nét Son
   ========================================================================== */
#concept{background:var(--ink)}
#concept .veil{  /* COURT deepened — powder → deep, gravity for the thesis line */
  background:
    radial-gradient(42% 40% at 50% 60%,rgba(134,230,226,.20),transparent 68%),
    linear-gradient(90deg,rgba(18,48,64,.4),transparent 55%),
    linear-gradient(164deg,#9fc0d2 0%,#6f9cb4 40%,#39627b 72%,#1b3d52 100%);
}
#concept .veil::before{content:"";position:absolute;left:0;right:0;bottom:8%;height:1px;background:linear-gradient(90deg,transparent,rgba(165,243,252,.5),transparent)}
#concept .inner{text-align:center}
#concept .vn{font-family:var(--serif);font-style:italic;font-weight:400;color:#fff;font-size:clamp(40px,6.4vw,110px);line-height:1.08}
#concept .gloss{font-family:var(--body);font-style:italic;font-size:clamp(17px,1.7vw,24px);color:var(--silver);margin-top:28px;letter-spacing:.02em}

/* ============================================================================
   §3 · SCIENCE — silver crystalline facets
   ========================================================================== */
#science{background:#071f2c}
#science .veil{  /* COURT mid — silver facets read on powder-blue */
  background:
    radial-gradient(45% 55% at 74% 50%,rgba(134,230,226,.20),transparent 68%),
    radial-gradient(38% 40% at 30% 30%,rgba(255,255,255,.4),transparent 60%),
    linear-gradient(164deg,#cfe6ef 0%,#b3d3e2 40%,#89b3c9 66%,#39627b 100%);
}
/* faceted silver shards, drifting slowly */
#science .facets{position:absolute;inset:0;z-index:-1;overflow:hidden;opacity:.55}
#science .facets span{position:absolute;display:block;background:linear-gradient(135deg,rgba(215,230,236,.5),rgba(134,230,226,.06) 55%,transparent);mix-blend-mode:screen;filter:blur(.3px);animation:shard 18s ease-in-out infinite}
#science .facets span:nth-child(1){width:34vw;height:60vh;left:56%;top:8%;transform:rotate(18deg);clip-path:polygon(20% 0,100% 26%,74% 100%,0 68%)}
#science .facets span:nth-child(2){width:22vw;height:44vh;left:72%;top:40%;transform:rotate(-12deg);clip-path:polygon(0 12%,100% 0,86% 88%,12% 100%);animation-delay:-4s}
#science .facets span:nth-child(3){width:16vw;height:30vh;left:60%;top:2%;transform:rotate(40deg);clip-path:polygon(50% 0,100% 60%,50% 100%,0 60%);animation-delay:-9s}
@keyframes shard{0%,100%{opacity:.35;transform:translateY(0) rotate(var(--r,0))}50%{opacity:.8;transform:translateY(-14px)}}
#science .inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center}
#science .col-copy{max-width:46ch}
#science h2{font-family:var(--serif);font-size:clamp(32px,3.6vw,58px);font-weight:400;line-height:1.1;margin-bottom:24px}
#science p{font-family:var(--body);font-size:clamp(18px,1.5vw,23px);line-height:1.7;color:var(--silver);margin-bottom:18px}
#science .actives{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px 26px}
#science .actives li{list-style:none;font-family:var(--sans);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ice);position:relative;padding-left:18px}
#science .actives li::before{content:"◆";position:absolute;left:0;color:var(--silver-dim);font-size:9px;top:2px}
@media(max-width:860px){#science .inner{grid-template-columns:1fr}#science .facets{opacity:.3}}

/* ============================================================================
   §4 · FILM — TVC slot (real film imported after production)
   ========================================================================== */
#film{background:#02121a}
#film .veil{  /* DEEP — the darkest bar, base bottoms only, frames the film */
  background:
    radial-gradient(55% 55% at 50% 46%,rgba(57,98,123,.5),transparent 70%),
    linear-gradient(176deg,#1b3d52 0%,#123243 45%,#0a2536 78%,#06202f 100%);
}
#film .inner{display:grid;place-items:center;text-align:center}
.filmslot{position:relative;width:min(1100px,86vw);aspect-ratio:16/9;border:1px solid rgba(165,243,252,.28);
  background:linear-gradient(140deg,#082230,#04151f);display:grid;place-items:center;overflow:hidden;
  box-shadow:0 30px 90px rgba(0,0,0,.5)}
.filmslot video,.filmslot img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.filmslot .play{position:relative;z-index:2;width:88px;height:88px;border-radius:50%;border:1px solid rgba(255,255,255,.6);display:grid;place-items:center;transition:.35s}
.filmslot .play::after{content:"";margin-left:5px;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent}
.filmslot:hover .play{background:rgba(255,255,255,.12);transform:scale(1.06)}
.filmslot .slotnote{position:absolute;bottom:18px;left:0;right:0;z-index:2;font-family:var(--sans);font-size:10px;letter-spacing:.35em;text-transform:uppercase;color:var(--silver-dim)}
#film .film-cap{margin-top:34px}

/* ============================================================================
   §5 · COURT INTRO — Nhã (partial) + one line
   ========================================================================== */
#court-intro{background:#06202f}
#court-intro .veil{  /* COURT silk — luminous powder, drifting */
  background:
    linear-gradient(115deg,rgba(207,230,239,.5) 0%,transparent 42%),
    linear-gradient(295deg,rgba(134,230,226,.28) 0%,transparent 48%),
    linear-gradient(164deg,#cfe6ef 0%,#a8c8da 44%,#6f9cb4 74%,#39627b 100%);
  background-size:200% 200%,200% 200%,100% 100%;
  animation:silk 22s ease-in-out infinite alternate;
}
@keyframes silk{0%{background-position:0% 0%,100% 100%,0 0}100%{background-position:100% 50%,0% 40%,0 0}}
/* faint silver court "threads" */
#court-intro .threads{position:absolute;inset:0;z-index:-1;opacity:.4;background-image:repeating-linear-gradient(100deg,transparent 0 38px,rgba(215,230,236,.12) 38px 39px)}
#court-intro .inner{text-align:center}
#court-intro .nha{font-family:var(--serif);font-size:clamp(80px,16vw,260px);line-height:.9;color:#fff;letter-spacing:.02em;text-shadow:0 6px 60px rgba(134,230,226,.3)}
#court-intro .line{font-family:var(--body);font-style:italic;font-size:clamp(18px,1.9vw,27px);color:var(--ice);margin-top:20px;max-width:36ch;margin-left:auto;margin-right:auto}

/* ============================================================================
   §6 · THE FOUR — pinned product choreography (the centerpiece)
   split stage: upper-left lane + lower-right lane, 4 products relayed
   ========================================================================== */
#stage{position:relative;height:560vh;background:#03131c;z-index:1}
#stage .pin{position:sticky;top:0;height:100vh;overflow:hidden;display:block}
#stage .stage-veil{position:absolute;inset:0;z-index:0;
  /* COURT deepened stage — luminous mid-blue with a deep pocket in each lane so both screen-blend bottles glow */
  background:
    radial-gradient(34% 42% at 26% 32%,rgba(10,42,60,.8),rgba(10,42,60,.35) 46%,transparent 72%),   /* UL pocket */
    radial-gradient(34% 42% at 74% 70%,rgba(10,42,60,.8),rgba(10,42,60,.35) 46%,transparent 72%),   /* LR pocket */
    radial-gradient(30% 30% at 80% 18%,rgba(134,230,226,.18),transparent 66%),
    linear-gradient(164deg,#a7c6d8 0%,#7ba2ba 40%,#436a83 72%,#22485e 100%);
}
#stage .seam{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1;pointer-events:none;
  background:linear-gradient(115deg,transparent calc(50% - 0.5px),rgba(165,243,252,.16) 50%,transparent calc(50% + 0.5px))}
#stage .stage-title{position:absolute;top:8%;left:50%;transform:translateX(-50%);z-index:4;text-align:center;font-family:var(--sans);font-size:11px;letter-spacing:.5em;text-transform:uppercase;color:var(--silver-dim)}

/* each product sits in a lane; JS drives --x/--y (lengths) /--o/--s */
.prod{position:absolute;z-index:3;width:auto;pointer-events:none;
  transform:translate(-50%,-50%) translate3d(var(--x,0px),var(--y,0px),0) scale(var(--s,1));
  opacity:var(--o,0);will-change:transform,opacity}
.prod img{height:var(--h,62vh);width:auto;mix-blend-mode:screen;filter:drop-shadow(0 0 55px rgba(134,230,226,.5))}
.prod .tag{position:absolute;left:50%;bottom:-64px;transform:translateX(-50%);white-space:nowrap;text-align:center;opacity:var(--to,0);transition:opacity .5s}
.prod .tag .nm{font-family:var(--serif);font-size:clamp(22px,2.4vw,38px);color:#fff;line-height:1}
.prod .tag .fn{font-family:var(--sans);font-size:10px;letter-spacing:.4em;text-transform:uppercase;color:var(--ice);margin-top:10px}
/* lane anchor points (centre of each lane) */
#p-cleanser{left:26%;top:34%;--h:56vh}
#p-serum   {left:26%;top:36%;--h:64vh}
#p-toner   {left:74%;top:66%;--h:60vh}
#p-cream   {left:74%;top:64%;--h:52vh}
/* the unifying line that appears mid-choreography */
#stage .nha-mark{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;text-align:center;font-family:var(--serif);font-size:clamp(60px,10vw,150px);color:rgba(255,255,255,.9);opacity:var(--nha-o,0);pointer-events:none;text-shadow:0 4px 50px rgba(134,230,226,.35)}
@media(max-width:860px){
  #p-cleanser,#p-serum{left:30%}#p-toner,#p-cream{left:70%}
  .prod img{height:calc(var(--h,52vh) * .8)}
}

/* ============================================================================
   §7 · COURT × SKIN — the concept complete
   ========================================================================== */
#court-skin{background:#051b28}
#court-skin .veil{  /* DAYBREAK sunrise — the "return" / dawn */
  background:
    radial-gradient(26% 22% at 50% 16%,rgba(255,255,255,.9),rgba(206,238,248,.45) 46%,transparent 66%),
    radial-gradient(50% 55% at 50% 60%,rgba(134,230,226,.16),transparent 72%),
    linear-gradient(176deg,#79bce8 0%,#a6d3ef 30%,#c7e7f4 50%,#7db1cf 72%,#23506b 100%);
  background-size:100% 100%,220% 220%,100% 100%;animation:silk 26s ease-in-out infinite alternate;
}
#court-skin .inner{text-align:center;display:grid;place-items:center}
#court-skin .statement{font-family:var(--serif);font-weight:400;font-size:clamp(28px,3.8vw,58px);line-height:1.28;max-width:20ch;color:#fff}
#court-skin .statement em{font-style:italic;color:var(--ice)}
#court-skin .sub{font-family:var(--body);font-style:italic;font-size:clamp(17px,1.6vw,24px);color:var(--silver);margin-top:30px;max-width:44ch}

/* ============================================================================
   §8 · THE COLLECTION — finale carousel (4 products)
   ========================================================================== */
#collection{background:#0a2637}
#collection .veil{  /* DAYBREAK exact — bright plinth finale */
  background:
    radial-gradient(24% 20% at 50% 12%,rgba(255,255,255,.95),rgba(206,238,248,.5) 46%,transparent 66%),
    radial-gradient(19% 27% at 80% 45%,rgba(165,243,252,.5),transparent 60%),
    linear-gradient(176deg,#57b2e6 0%,#93cfec 28%,#c7e7f4 48%,#7db1cf 66%,#23506b 86%,#0c2b3d 100%);
}
#collection .col-head{position:absolute;top:12vh;left:0;right:0;z-index:4;text-align:center}
#collection .col-head .kicker{color:var(--glacier)}
#collection .col-head h2{font-family:var(--serif);font-size:clamp(38px,5vw,84px);color:var(--glacier);font-weight:400}
.carousel{position:absolute;inset:0;z-index:3;display:flex;align-items:center;overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;scrollbar-width:none}
.carousel::-webkit-scrollbar{display:none}
.slide{position:relative;flex:0 0 100%;height:100%;scroll-snap-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2vh;padding-top:8vh}
.slide .pocket{position:absolute;top:44%;left:50%;transform:translate(-50%,-50%);width:46vh;height:58vh;border-radius:50%;background:radial-gradient(closest-side,rgba(5,22,31,.85),transparent 72%);z-index:1}
.slide .bottle{position:relative;z-index:2;height:52vh;width:auto;mix-blend-mode:screen;filter:drop-shadow(0 30px 60px rgba(5,22,31,.5));transition:transform .1s linear}
.slide .cap{position:relative;z-index:3;text-align:center;margin-top:24px}
.slide .cap .nm{font-family:var(--serif);font-size:clamp(26px,3vw,46px);color:var(--glacier)}
.slide .cap .fn{font-family:var(--sans);font-size:11px;letter-spacing:.42em;text-transform:uppercase;color:#1c4c60;margin-top:12px}
.slide .cap .ln{font-family:var(--body);font-style:italic;font-size:clamp(16px,1.4vw,20px);color:#20404f;margin-top:14px}
/* carousel controls */
.car-nav{position:absolute;bottom:8vh;left:50%;transform:translateX(-50%);z-index:5;display:flex;gap:10px}
.car-nav button{width:11px;height:11px;border-radius:50%;border:1px solid var(--glacier);background:transparent;cursor:pointer;padding:0;transition:.3s}
.car-nav button[aria-current="true"]{background:var(--glacier)}
.car-arrow{position:absolute;top:50%;z-index:5;transform:translateY(-50%);background:none;border:none;color:var(--glacier);font-size:34px;cursor:pointer;opacity:.5;transition:opacity .3s;font-family:var(--serif)}
.car-arrow:hover{opacity:1}
.car-arrow.prev{left:2vw}.car-arrow.next{right:2vw}

/* ============================================================================
   FOOTER — clean, slides up last (like MFK white footer)
   ========================================================================== */
.site-foot{position:relative;z-index:2;background:var(--paper);color:var(--glacier);padding:10vh var(--gutter) 6vh}
.site-foot .fgrid{display:flex;flex-wrap:wrap;justify-content:space-between;gap:40px;margin-top:0;padding-top:0}
.site-foot .fgrid h4{font-family:var(--sans);font-size:11px;letter-spacing:.34em;text-transform:uppercase;color:#5a7885;margin-bottom:16px}
.site-foot .fgrid span{display:block;font-family:var(--body);font-size:18px;color:var(--glacier);margin-bottom:8px;opacity:.82}
.site-foot .fine{margin-top:8vh;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-family:var(--sans);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:#5a7885}

/* ============================================================================
   accessibility
   ========================================================================== */
/* ============================================================================
   FRAME v4 — new section skeleton (placeholders where assets aren't ready)
   ========================================================================== */
.center{text-align:center;max-width:min(92vw,940px);margin:0 auto;position:relative;z-index:3}

/* placeholder box */
.ph{position:relative;display:grid;place-items:center;border:1px dashed rgba(20,60,70,.4);border-radius:5px;
  background:linear-gradient(160deg,rgba(255,255,255,.16),rgba(180,216,230,.12))}
.phlabel{font-family:var(--sans);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:#37545b;text-align:center;padding:10px 16px}

/* filled media fills its slot */
.tvc-frame video,#story .sv-media video,.imgsec-media img,.imgsec-media video,.prod-media img,.prod-media video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.prod-slide img{display:block;width:100%;height:100%;object-fit:cover}

/* generic new section: full-screen, centered, over the icy field */
#tvc,#nha,#nha-end,#finale{position:relative;min-height:100vh;min-height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4vh;overflow:hidden;padding:10vh var(--gutter)}

/* ---- S2 concept: LINGERS (sticky within the wrap) until S3 slides over it ---- */
.linger-wrap{position:relative}
#concept{position:sticky;top:0;height:100vh;background:transparent;display:flex;align-items:center;justify-content:center;overflow:hidden;z-index:1}
#story{z-index:6}   /* Story slides up OVER the pinned Concept + its sparkle (concept-spark-top is z:5) */

/* ---- S3 science over scroll-video · pulled up (‑105vh) so it RISES over the locked concept, z:2 covers the opening (z:1) ---- */
#story{position:relative;height:300vh;margin-top:-105vh}   /* taller → long FROZEN last-frame tail so S3 stays locked while S4 grows over it */
#story .pin{position:sticky;top:0;height:100vh;height:100svh;width:100%;display:grid;place-items:center;overflow:hidden}
#story .sv-media{grid-area:1/1;width:100%;height:100%;background:linear-gradient(160deg,#0c2a34,#061a22);border:none;border-radius:0}
#story .sv-media .phlabel{color:#9fc0c6}
#story .sv-text{grid-area:1/1;align-self:center;justify-self:center;text-align:center;padding:0 var(--gutter);z-index:3;opacity:0;transition:opacity .4s ease}
#story .sv-text p{font-family:var(--serif);font-size:clamp(15px,1.5vw,22px);color:#b7c2c9;line-height:1.4;max-width:36ch;margin:0 auto;letter-spacing:.01em;text-shadow:0 1px 20px rgba(10,30,40,.45)}

/* ---- S4 TVC: SCROLL-driven — emerges small in the middle of locked S3, enlarges to full screen, then locks ---- */
#tvc{padding:0;height:170vh;position:relative;z-index:8;margin-top:-170vh;display:block;overflow:visible}   /* block + overflow visible so the sticky pin PINS · height=TS.len, margin=TS.over (JS re-applies) · len=over aligns S4's bottom with S3's so S5 sits right under both */
/* S5 (#nha) is a NORMAL section right below S4 — S4 slides UP off the top to reveal it (no overlap) */
.tvc-pin{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;display:grid;place-items:center;background:transparent}   /* transparent: while it rises pre-pin (frame still invisible) you see the locked S3 behind, not a black curtain */
#tvc .tvc-frame{position:absolute;inset:0;width:100%;height:100%;aspect-ratio:auto;border-radius:0;transform-origin:center;
  transform:scale(.3);filter:blur(16px);opacity:0;cursor:pointer;will-change:transform,filter,opacity}   /* JS scrubs these by scroll */
#tvc .play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:3;width:82px;height:82px;border-radius:50%;border:1px solid rgba(255,255,255,.8);background:rgba(0,0,0,.22);display:grid;place-items:center;cursor:pointer;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}
#tvc .play::after{content:"";margin-left:6px;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent}
#tvc .tvc-cap{position:absolute;bottom:8vh}
#tvc .eyebrow{color:#37545b}

/* ---- S5 Nhã + FINALE image sections — FULL-BLEED background image ---- */
.imgsec .imgsec-media,.product .prod-media{position:absolute;inset:0;width:100%;height:100%;border:none;border-radius:0;background:linear-gradient(160deg,#0c2a34,#061a22)}
.imgsec .imgsec-media .phlabel,.product .prod-media .phlabel{color:#9fc0c6}
.imgsec .imgsec-text{position:relative;z-index:3}
#nha .nha{font-family:var(--serif);font-size:clamp(64px,12vw,190px);line-height:.9;color:#fff;text-shadow:0 4px 40px rgba(0,20,26,.5)}
#nha .line{font-family:var(--body);font-style:italic;font-size:clamp(18px,1.8vw,26px);color:#e8f3f4;margin-top:14px}
#nha .line em{color:inherit}

/* ---- products (5a–5d): full-bleed scenes scroll (creating the seam); the
        title/box/caption live in ONE pinned HUD above them ---- */
.product{position:relative;height:100vh;overflow:hidden}

/* ═══ THE PERSISTENT HUD ═══
   pinned at screen centre for the whole product journey. The box is a fixed
   window; a strip of the four product images scrolls BEHIND it locked to page
   scroll, so the box-seam crosses centre exactly when each scene seam does.
   Title + caption stay put but FADE OUT at each seam and swap to the next
   product (JS-driven) — so the text reads as fluid, not scrolling. */
.products{position:relative;z-index:1}
.prod-hud{position:sticky;top:0;height:100vh;margin-bottom:-100vh;z-index:6;pointer-events:none}
.prod-top{position:absolute;top:12vh;left:0;right:0;z-index:5;text-align:center;opacity:0}
.prod-bot{position:absolute;bottom:12vh;left:0;right:0;z-index:5;text-align:center;opacity:0}
.prod-top .nm{font-family:var(--serif);font-size:clamp(28px,3.4vw,54px);color:#fff}
.prod-top .fn{font-family:var(--sans);font-size:11px;letter-spacing:.4em;text-transform:uppercase;color:#cfe8ea;margin-top:10px}
.prod-bot .ln{font-family:var(--body);font-style:italic;font-size:clamp(17px,1.5vw,22px);color:#dff0f1}

.prod-box-cell{position:absolute;inset:0;display:grid;place-items:center}
.prod-box{--bh:min(60vh,430px);width:min(38vw,320px);height:var(--bh);overflow:hidden;border-radius:3px;
  box-shadow:0 26px 74px rgba(0,18,26,.5),0 0 0 1px rgba(255,255,255,.16);
  opacity:0;transform:translateY(64px);transition:opacity 1s ease,transform 1.15s cubic-bezier(.16,.7,.3,1)}
.prod-box.in{opacity:1;transform:none}
.prod-strip{display:flex;flex-direction:column;will-change:transform}
.prod-slide{flex:0 0 var(--bh);width:100%;height:var(--bh);border:none;border-radius:0;
  background:linear-gradient(160deg,#0c2a34,#061a22)}
.prod-slide .phlabel{color:#bcd8de}

/* ---- Nhã-end : TEXT-ONLY closing beat — treated like §2 Concept: TRANSPARENT,
        sits on the icy video field, dark graphite-silver readable text ---- */
#nha-end{background:transparent}   /* NO background — just the text over the fixed bg-loop video */
#nha-end .summary{font-family:var(--serif);font-size:clamp(24px,3vw,46px);color:#fff;line-height:1.32;letter-spacing:.01em;max-width:30ch;margin:0 auto;text-shadow:0 2px 30px rgba(6,26,34,.5)}
#nha-end .sub{font-family:var(--body);font-style:italic;font-size:clamp(16px,1.5vw,22px);color:#eaf4f5;margin-top:26px;text-shadow:0 1px 20px rgba(6,26,34,.5)}
#nha-end .summary em{color:inherit}#nha-end .sub em{color:inherit;font-style:italic}

/* ---- collection : all four, full-bleed ---- */
#finale{background:#04141b;justify-content:flex-start}
#finale .imgsec-media{background:radial-gradient(74% 64% at 50% 46%,#123f49 0%,#0a2a33 54%,#04141b 100%)}
#finale .imgsec-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
#finale .imgsec-media::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(4,20,27,.62),transparent 60%)}   /* scrim so the title + CTA read */
#finale .imgsec-text{align-self:center;padding-top:8vh}
#finale .kicker{color:#cfe8ea;margin-bottom:12px}
#finale .coll-title{font-family:var(--serif);font-size:clamp(26px,3vw,50px);color:#fff;font-weight:400;letter-spacing:.01em;text-shadow:0 3px 30px rgba(0,10,16,.5)}
#finale .disc{display:inline-block;margin-top:24px;font-family:var(--sans);font-size:11px;letter-spacing:.34em;text-transform:uppercase;color:#eaf6ff;border:1px solid rgba(255,255,255,.55);padding:14px 42px;transition:background .3s,border-color .3s}
#finale .disc:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ═══ S5 · HERITAGE — scrim so the white title reads over the pale sky ═══ */
#nha .imgsec-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
#nha .imgsec-media::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 70% 60% at 50% 52%,rgba(6,26,34,.42),transparent 72%)}
#nha .nha{text-shadow:0 6px 46px rgba(4,18,24,.75)}

/* ═══ S6 · VÉN MÀN — clear each element's veil with the cursor to unveil the four ═══ */
#venman{position:relative;height:100vh;height:100svh;overflow:hidden;padding:0;background:#dfeef1}
.vm-stage{position:absolute;inset:0;background:#dfeef1;isolation:isolate}
.vm-shot{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.vm-veils{position:absolute;inset:0;display:flex;z-index:2}
.vm-veil{position:relative;flex:0 0 var(--w,25%)}   /* width per column so each veil brackets its bottle */
.vm-veil canvas{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:crosshair;touch-action:none;-ms-touch-action:none}
.vm-veil::after{content:'';position:absolute;left:0;top:0;bottom:0;width:var(--seam,80px);transform:translateX(-50%);z-index:4;pointer-events:none;background:linear-gradient(90deg,transparent,rgba(255,255,255,var(--seamA,.42)),transparent)}   /* soft light-seam connects the set (was a hard hairline) */
.vm-veil:first-child::after{display:none}
.vm-drift{position:absolute;inset:0;z-index:3;pointer-events:none;mix-blend-mode:screen}   /* shared drifting frost sparkle over the whole set */
.vm-veil .g{position:absolute;inset:0;z-index:3;display:grid;place-items:center;text-align:center;pointer-events:none;transition:opacity .6s}
.vm-veil .g .vn{font-family:var(--serif);font-size:clamp(24px,2.3vw,40px);color:rgba(0,0,0,.72);letter-spacing:.01em}
.vm-veil .g .en{font-family:var(--sans);font-size:10px;letter-spacing:.34em;text-transform:uppercase;color:rgba(0,0,0,.5);margin-top:9px}
.vm-veil .g .ds{font-family:var(--body);font-style:italic;font-size:clamp(12px,1.05vw,15px);line-height:1.42;color:rgba(0,0,0,.55);max-width:80%;margin:13px auto 0}
.vm-veil.next .g .vn{animation:vmpulse 2.4s ease-in-out infinite}
.vm-veil.done .g{opacity:0}
@keyframes vmpulse{0%,100%{opacity:.6}50%{opacity:.95}}
.vm-cap{position:absolute;top:6vh;left:0;right:0;z-index:5;text-align:center;color:rgba(0,0,0,.6);pointer-events:none}
.vm-cap .kicker{color:rgba(0,0,0,.64);font-size:14px;letter-spacing:.62em}
.vm-cap .vm-hint{color:rgba(0,0,0,.52);font-size:13px;letter-spacing:.28em;margin-top:14px}
.vm-hint{font-family:var(--sans);font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:#5f97a3;margin-top:12px}

/* ═══ S8 · NHÃ band (letterbox image w/ baked manifesto) ═══ */
#nha-band{position:relative;z-index:1;padding:0;min-height:0;height:82vh;background:#05121a;display:block;overflow:hidden}   /* position:relative so it paints OVER the fixed bg-field video (was static → the icy bg-loop bled through = the "empty section") */
#nha-band img{display:block;width:100%;height:100%;object-fit:cover}   /* crop the baked letterbox bars so it doesn't read as an empty band */

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .rv,.rv-soft{opacity:1;transform:none}
  #story .sv-text{opacity:1;transform:none}
  #tvc .tvc-frame{transform:none;filter:none;opacity:1}
  .prod-box{opacity:1;transform:none}
  .vm-veil canvas{display:none}
  .vm-veil .g{opacity:0}
}

/* ---------- TYPE · baked from your #tunetext (sizes made responsive; S7 kept white for legibility over the sparkle) ---------- */
.site-head nav a{font-size:14px;letter-spacing:.14em;line-height:.8;color:#fff}
.display{line-height:.8}
#story .sv-text p{font-size:clamp(17px,2.3vw,25px);letter-spacing:.14em;color:#fff}
#nha .nha{font-size:clamp(52px,13vw,130px);letter-spacing:.14em;color:#fff}
#nha .line{font-size:clamp(17px,2.3vw,25px);letter-spacing:.14em;line-height:1.4}
.vm-cap .kicker{font-size:clamp(15px,2vw,25px);letter-spacing:.14em;line-height:1.4;color:#111}
.vm-cap .vm-hint{font-size:14px;letter-spacing:.14em;line-height:1.4}
.vm-veil .g .vn{font-size:clamp(22px,2.8vw,40px);letter-spacing:.14em;line-height:1.4;color:#111}
.vm-veil .g .en{font-size:14px;letter-spacing:.14em;line-height:1.4;color:#111}
.vm-veil .g .ds{font-size:15px;line-height:1.4}
#nha-end .summary{font-size:clamp(24px,3vw,40px);letter-spacing:.07em;line-height:1.4;color:#111;text-shadow:0 1px 22px rgba(255,255,255,.65)}
#nha-end .sub{font-size:clamp(16px,1.8vw,24px);letter-spacing:.14em;line-height:1.4;color:#3d3d3d;text-shadow:0 1px 16px rgba(255,255,255,.6)}
#finale .coll-title{font-size:clamp(24px,3vw,40px);letter-spacing:.14em;line-height:.8;color:#fff}

/* ---------- responsive · mobile + tablet first pass ---------- */
@media(max-width:900px){
  .vm-veil .g .vn{font-size:clamp(18px,3.6vw,34px)}
  .vm-veil .g .ds{font-size:12.5px;max-width:88%;margin-top:10px}
  .vm-cap .kicker{font-size:clamp(14px,2.4vw,20px)}
  .vm-cap .vm-hint{font-size:12px}
}
@media(max-width:640px){
  body{overflow-x:clip}
  #nha .nha{font-size:clamp(46px,17vw,92px)}
  #nha-end .summary{font-size:clamp(21px,6.2vw,32px);max-width:24ch}
  #finale .coll-title{font-size:clamp(21px,6vw,34px)}
  #story .sv-text p{font-size:clamp(16px,4.6vw,22px)}
  /* S6 · VÉN MÀN · one veil at a time, full screen (horizontal 4 bottle source, one bottle per screen) */
  #venman{height:100svh}
  .vm-shot{display:none}                                    /* base 4 bottle shot hidden; each veil crops its own bottle */
  .vm-veils{display:block}                                  /* stop the 4 column flex row */
  .vm-veil{position:absolute;inset:0;flex:none;width:auto;
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .55s ease,visibility 0s linear .55s;
    background-color:#dfeef1;                               /* fills any letterbox gap so it blends */
    background-image:url(../assets/collection.jpeg);background-repeat:no-repeat;
    background-size:400% auto;background-position:center}   /* 400% = 4 bottles wide, uniform scale (no distortion) */
  .vm-veil:nth-child(1){background-position:0% center}      /* Sương to bottle 1 */
  .vm-veil:nth-child(2){background-position:33.333% center} /* Mây to bottle 2 */
  .vm-veil:nth-child(3){background-position:66.667% center} /* Sáng to bottle 3 */
  .vm-veil:nth-child(4){background-position:100% center}    /* Lặng to bottle 4 */
  .vm-veil.next{opacity:1;visibility:visible;pointer-events:auto;transition:opacity .55s ease}  /* only the active veil shows and takes touch */
  .vm-veil::after{display:none}                             /* no column seams in single view */
  .vm-veil canvas{cursor:default}
  #venman.vm-all .vm-veils{display:none}                    /* final: hide the cleared veils */
  #venman.vm-all .vm-shot{display:block;object-fit:contain;background:#dfeef1}   /* and show the whole court */
  .vm-veil .g{padding:0 8vw}
  .vm-veil .g .vn{font-size:clamp(30px,9vw,52px);letter-spacing:.04em}
  .vm-veil .g .en{display:block;font-size:11px;letter-spacing:.2em;margin-top:12px}
  .vm-veil .g .ds{display:block;font-size:15px;line-height:1.5;max-width:26ch;margin-top:16px}
  .vm-cap{top:auto;bottom:6vh}                              /* NHÃ kicker and hint to the base, clear of the centered label */
  .vm-cap .kicker{font-size:12px;letter-spacing:.28em}
  .vm-cap .vm-hint{font-size:11px;letter-spacing:.22em}
  /* footer stacks */
  .site-foot{padding:8vh var(--gutter) 5vh}
  .site-foot .fgrid{flex-direction:column;gap:22px}
  .site-foot .fine{flex-direction:column;gap:8px;margin-top:6vh}
  .site-head{padding:16px var(--gutter)}
  .site-head .logo img{height:18px}
}

/* ONE FACE · micro label rescue: Didone needs weight and air at small sizes */
.site-head nav a,.kicker,.func,.eyebrow,.cta,.scrollcue,
#science .actives li,.filmslot .slotnote,#stage .stage-title,
.prod .tag .fn,.slide .cap .fn,.site-foot .fgrid h4,.site-foot .fine,
.phlabel,.prod-top .fn,#finale .disc,.vm-veil .g .en,.vm-hint{
  font-weight:var(--micro-weight);
  font-optical-sizing:auto;
  font-synthesis:none;
}