/* ============================================================
   FONT MASTHEAD — Oswald 700 (kèm nguồn dự phòng)
   ============================================================ */
@font-face{
  font-family:'OswaldVN';
  font-style:normal;font-weight:700;font-display:swap;
  src:url('https://cdn.jsdelivr.net/fontsource/fonts/oswald@latest/vietnamese-700-normal.woff2') format('woff2');
  unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB;
}
@font-face{
  font-family:'OswaldVN';
  font-style:normal;font-weight:700;font-display:swap;
  src:url('https://cdn.jsdelivr.net/fontsource/fonts/oswald@latest/latin-700-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

/* ============================================================
   TOKENS  — monochrome, nền sáng
   ============================================================ */
:root{
  --bg:#F8F8F5;
  --paper:#FFFFFF;
  --ink:#141413;
  --ink-2:#5E5D59;
  --ink-3:#9C9A94;
  --ink-4:#BFBDB7;
  --line:#E3E1DC;
  --line-2:#EDEBE7;

  --display:'Oswald','OswaldVN','Arial Narrow','Haettenschweiler',Impact,sans-serif;
  --sans:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;

  --w-text:720px;
  --w-wide:1040px;
  --w-full:1240px;

  --pad:24px;
  --sec-gap:clamp(72px,9vw,128px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:19px;
  font-weight:400;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block}
figure{margin:0}
::selection{background:#141413;color:#F5F4F1}

/* ============================================================
   STAGE : MASTHEAD + OBJECT + 3 CARD STATES
   ============================================================ */
.stage{
  position:relative;
  width:100%;
  height:100vh;height:100svh;
  overflow:hidden;
  background:var(--bg);
}

/* --- masthead --- */
.masthead{
  position:absolute;top:12vh;left:0;
  width:100%;
  text-align:center;
  padding:0 var(--pad);
  z-index:5;
  pointer-events:none;
  will-change:transform,opacity;
}

/* chờ chuỗi mở màn mới hiện — tránh loé một nhịp lúc trang vừa tải */
.js-intro .mh-in,
.js-intro #cards,
.js-intro .cue-in{visibility:hidden}

.mh-in{will-change:transform,opacity}
.masthead h1{
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(4rem,12vw,9rem);
  line-height:1;
  letter-spacing:2px;
  text-transform:uppercase;
  color:#000;
  margin:0;
}

/* --- hero object : Three.js scene --- */
.obj-pos{
  position:absolute;inset:0;
  z-index:10;
  pointer-events:none;
}
.obj-wrap{
  position:absolute;inset:0;
  will-change:transform,opacity;
}
.obj-inner{
  position:absolute;inset:0;
  opacity:1;
}
.obj-3d{position:absolute;inset:0;width:100%;height:100%}
.obj-3d canvas{display:block;width:100%!important;height:100%!important}
.hero-fallback{
  display:none;position:absolute;left:50%;top:50%;
  width:auto;height:92%;
  transform:translate(-50%,-50%);
}
.obj-inner.no-webgl .obj-3d{display:none}
.obj-inner.no-webgl .hero-fallback{display:block}

/* --- info cards --- */
.cards{
  position:absolute;top:0;left:0;
  width:100%;height:100%;
  pointer-events:none;
  z-index:20;
}
.card{
  position:absolute;
  bottom:12vh;
  right:max(5%,calc(50% - 400px));
  width:320px;
  background:var(--paper);
  padding:24px;
  border-radius:6px;
  box-shadow:0 10px 40px rgba(0,0,0,.05);
  opacity:0;
  visibility:hidden;
  transform:translateY(20px);
  will-change:transform,opacity;
}
.card-label{
  font-size:.65rem;
  text-transform:uppercase;
  letter-spacing:.15em;
  color:var(--ink-3);
  font-weight:600;
  margin:0 0 12px;
}
.card-title{
  font-size:1.15rem;
  font-weight:700;
  color:#000;
  line-height:1.4;
  margin:0 0 8px;
}
.card-line{
  font-size:.85rem;
  color:var(--ink-3);
  line-height:1.6;
  margin:0;
}
.card-note{
  font-size:.85rem;
  color:var(--ink-3);
  line-height:1.6;
  margin:0;
}
.card-note b{color:#000;font-weight:700}

/* --- scroll cue --- */
.scroll-cue{
  position:absolute;bottom:6vh;left:0;
  width:100%;
  display:flex;align-items:center;justify-content:center;gap:15px;
  font-size:.7rem;
  text-transform:uppercase;
  letter-spacing:.15em;
  color:var(--ink-3);
  font-weight:500;
  z-index:15;
  pointer-events:none;
  will-change:opacity;
}
.scroll-cue i{display:block;width:35px;height:1px;background:#d5d5d5}
.cue-in{display:flex;align-items:center;gap:15px;will-change:opacity}

/* --- lóe sáng mở màn --- */
.flash{
  position:absolute;left:50%;top:53%;
  width:min(64vw,820px);aspect-ratio:1;
  transform:translate(-50%,-50%);
  z-index:11;
  pointer-events:none;
  opacity:0;
}
.flash .bloom{
  position:absolute;inset:0;
  border-radius:50%;
  background:radial-gradient(circle,#fff 0%,rgba(255,255,255,.92) 34%,rgba(255,255,255,0) 66%);
  will-change:transform,opacity;
}


/* fallback: không có GSAP → xếp dọc tĩnh, đọc được đầy đủ */
.stage.is-static{height:auto;overflow:visible;padding:40px 0 64px}
.stage.is-static .masthead{position:static;margin:0 0 40px;padding:0 var(--pad)}
.stage.is-static .obj-pos{position:relative;top:auto;left:auto;transform:none;width:min(78vw,460px);height:min(54vh,460px);margin:0 auto 48px}
.stage.is-static .obj-wrap{position:absolute;inset:0}
.stage.is-static .obj-inner{position:absolute;inset:0;opacity:1!important}
.stage.is-static .hero-fallback{position:relative;left:auto;top:auto;transform:none;margin:0 auto;height:100%}
.stage.is-static .cards{position:static;width:100%;height:auto;max-width:var(--w-text);margin:0 auto;padding:0 var(--pad)}
.stage.is-static .card{position:static;opacity:1!important;visibility:visible!important;transform:none!important;width:auto;margin:0 0 20px}
.stage.is-static .scroll-cue{display:none}

/* ============================================================
   ARTICLE
   ============================================================ */
.story{position:relative;z-index:6;background:var(--bg);padding:clamp(56px,9vh,110px) var(--pad) 0}
.wrap{max-width:var(--w-text);margin:0 auto}
.wrap-wide{max-width:var(--w-wide);margin:0 auto}
.wrap-full{max-width:var(--w-full);margin:0 auto}

.story-head{max-width:var(--w-wide);margin:0 auto clamp(40px,5.4vw,66px);text-align:center}
.story-head h2{
  font-family:var(--sans);
  font-weight:800;
  font-size:clamp(1.95rem,4.9vw,3.5rem);
  line-height:1.12;letter-spacing:-.025em;
  color:var(--ink);margin:0;
  max-width:18ch;margin-inline:auto;
}
.story-head .rule{width:48px;height:2px;background:var(--ink);margin:32px auto 0}

p{margin:0 0 1.5em;color:#33322F}
.story p{font-size:1.06rem;line-height:1.85}
.lead{
  font-size:1.2rem !important;
  line-height:1.72 !important;
  font-weight:500;
  color:var(--ink);
}
.story p b,.story p strong{color:var(--ink);font-weight:700}

/* section headings */
.sec{padding:var(--sec-gap) 0 0}
.sec-head{max-width:var(--w-text);margin:0 auto clamp(28px,3.6vw,42px)}
.sec-kicker{
  font-size:11px;font-weight:700;letter-spacing:.24em;text-transform:uppercase;
  color:var(--ink-3);margin:0 0 16px;
  display:flex;align-items:center;gap:14px;
}
.sec-kicker::after{content:"";flex:1;height:1px;background:var(--line)}
.sec-head h3{
  font-family:var(--sans);
  font-weight:800;
  font-size:clamp(1.6rem,3.4vw,2.6rem);
  line-height:1.16;letter-spacing:-.022em;
  color:var(--ink);margin:0;
}
h4.sub{
  font-family:var(--sans);
  font-weight:700;
  font-size:clamp(1.08rem,1.7vw,1.3rem);
  line-height:1.35;
  color:var(--ink);
  margin:2.4em 0 .9em;
}

/* ============================================================
   MEDIA
   ============================================================ */
.article-media{margin:clamp(44px,5.6vw,76px) auto}
.article-media .frame{position:relative;aspect-ratio:16/9;background:#EAE8E4;overflow:hidden}
.article-media .frame.has-img{aspect-ratio:auto;background:transparent}   /* ảnh đứng riêng: giữ nguyên tỉ lệ, không nền */
.article-media img{
  display:block;
  width:100%;                       /* luôn lấp hết chiều rộng khung */
  height:auto;
  max-height:90vh;                  /* ảnh dọc không kéo dài quá màn hình */
  object-fit:contain;
  margin:0 auto;
  opacity:0;transform:scale(1.02);
  transition:opacity .8s var(--ease),transform 1s var(--ease);
}
.article-media img.loaded{opacity:1;transform:scale(1)}
.media-placeholder{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  text-align:center;padding:24px;
  background:#EAE8E4;border:1px solid var(--line);
  font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  color:#AAA79F;
}
img.loaded + .media-placeholder{display:none}
.media-duo{
  display:grid;grid-template-columns:1fr 1fr;
  gap:clamp(16px,2.2vw,30px);
  margin:clamp(44px,5.6vw,76px) auto;
  align-items:start;
}
.media-duo .article-media{margin:0}
.media-duo .article-media .frame,
.media-duo .article-media .frame.has-img{
  aspect-ratio:16/10;background:#EAE8E4;
}
.media-duo .article-media img{
  width:100%;max-width:none;height:100%;max-height:none;
  object-fit:cover;margin:0;
}
.media-duo figcaption{max-width:none}

figcaption{
  font-size:.79rem;line-height:1.6;font-weight:400;
  color:var(--ink-3);
  margin:14px auto 0;max-width:var(--w-text);
}

.rv{opacity:0;transform:translateY(20px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.rv.in{opacity:1;transform:none}
.rv-m{opacity:0;transform:scale(.96);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.rv-m.in{opacity:1;transform:none}

/* ============================================================
   GALLERY
   ============================================================ */
.gallery{margin:clamp(52px,6.6vw,88px) 0;position:relative}
.gal-track{
  display:flex;align-items:center;gap:24px;
  overflow-x:auto;overflow-y:hidden;
  overscroll-behavior-x:contain;
  overscroll-behavior-y:auto;          /* cuộn dọc luôn xuyên xuống trang */
  scroll-snap-type:x proximity;        /* bắt điểm nhẹ, không giằng tay người đọc */
  touch-action:pan-x pan-y;            /* vuốt dọc vẫn cuộn trang bình thường */
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;-ms-overflow-style:none;
  padding-inline:max(var(--pad),calc((100% - min(64vw,740px))/2));
  cursor:grab;
}
.gal-track.dragging{cursor:grabbing;scroll-snap-type:none;scroll-behavior:auto}
.gal-track::-webkit-scrollbar{display:none}
.gal-item{
  flex:0 0 min(64vw,740px);
  scroll-snap-align:center;
  opacity:.4;
  transition:opacity .5s var(--ease);
}
.gal-item.active{opacity:1}
.gal-item .frame,
.gal-item .frame.has-img{
  position:relative;aspect-ratio:16/10;
  background:#EAE8E4;overflow:hidden;
}
.gal-item img{
  display:block;
  width:100%;max-width:none;height:100%;max-height:none;
  object-fit:cover;margin:0;
  opacity:0;transition:opacity .6s var(--ease);
}
.gal-item img.loaded{opacity:1}
.gal-cap{
  display:flex;justify-content:space-between;align-items:baseline;gap:20px;
  margin:13px 1px 0;font-size:.79rem;color:var(--ink-3);
}
.gal-meta{
  max-width:var(--w-full);margin:24px auto 0;padding:0 var(--pad);
  display:flex;align-items:center;gap:18px;
  font-size:11px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink-3);
}
.gal-count b{color:var(--ink);font-weight:700}
.gal-meta .bar{flex:1;height:1px;background:var(--line);position:relative;max-width:220px}
.gal-meta .bar i{position:absolute;left:0;top:0;height:1px;background:var(--ink);width:33.333%;transition:transform .5s var(--ease);transform-origin:left}

/* ============================================================
   BIG MOMENT
   ============================================================ */
.moment{
  margin:clamp(66px,9vw,128px) auto;
  text-align:center;
  padding:clamp(40px,5.4vw,68px) var(--pad);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  max-width:var(--w-wide);
}
.moment .m-label{
  font-size:11px;font-weight:700;letter-spacing:.26em;text-transform:uppercase;
  color:var(--ink-3);margin:0 0 24px;
}
.moment .m-date{
  font-family:var(--display);
  font-size:clamp(3rem,10.5vw,7.6rem);
  line-height:.92;letter-spacing:.01em;
  color:var(--ink);margin:0;
}
.moment .m-text{
  font-size:1rem;line-height:1.78;color:#3A3936;
  max-width:54ch;margin:28px auto 0;
}

/* ============================================================
   DATA IN PROSE
   ============================================================ */
.hl{margin:clamp(42px,5.4vw,68px) 0;border-top:1px solid var(--line)}
.hl-row{
  display:flex;align-items:baseline;gap:clamp(18px,3vw,42px);
  padding:24px 0;border-bottom:1px solid var(--line-2);
}
.hl-year{
  font-family:var(--display);
  font-size:clamp(1.7rem,3.4vw,2.6rem);
  line-height:1;letter-spacing:.008em;
  color:var(--ink);flex:0 0 auto;min-width:5.5ch;
}
.hl-vals{font-size:.94rem;line-height:1.85;color:var(--ink-2);margin:0}
.hl-vals b{color:var(--ink);font-weight:700}

.figure-line{margin:clamp(38px,4.8vw,60px) 0;padding-left:26px;border-left:2px solid var(--ink)}
.figure-line .n{
  font-family:var(--display);
  font-size:clamp(2.2rem,4.6vw,3.4rem);
  line-height:1;letter-spacing:.008em;color:var(--ink);margin:0 0 10px;
}
.figure-line .d{font-size:.92rem;line-height:1.72;color:var(--ink-2);margin:0}
.figure-pair{display:grid;grid-template-columns:1fr 1fr;gap:clamp(26px,4vw,52px)}
.figure-pair .figure-line{margin:0}

/* ============================================================
   CHART
   ============================================================ */
.chart-block{margin:clamp(56px,7.4vw,104px) auto;max-width:var(--w-wide)}
.chart-head{
  font-family:var(--sans);font-weight:800;
  font-size:clamp(1.3rem,2.5vw,1.95rem);
  line-height:1.22;letter-spacing:-.02em;
  color:var(--ink);margin:0;max-width:24ch;
}
.chart-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:22px;
  margin:20px 0 24px;
  font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-2);
}
.lg{display:flex;align-items:center;gap:9px}
.lg i{width:11px;height:11px;display:block}
.lg.rev i{background:#1B1B1A}
.lg.pro i{background:#C3C0BA}
.chart-svg{width:100%;height:auto;display:block;overflow:visible}
.chart-svg .bar{transform:scaleY(0);transform-origin:50% 100%;transition:transform .9s var(--ease)}
.chart-block.in .chart-svg .bar{transform:scaleY(1)}
.chart-src{font-size:.75rem;color:var(--ink-3);margin:16px 0 0}

/* ============================================================
   LISTS / ENDING / CREDIT
   ============================================================ */
ul.plain{list-style:none;margin:0 0 1.6em;padding:0}
ul.plain li{
  position:relative;padding-left:24px;margin:0 0 .5em;
  color:#33322F;font-size:1.02rem;line-height:1.8;
}
ul.plain li::before{content:"";position:absolute;left:0;top:.82em;width:9px;height:1px;background:var(--ink)}

.ending{margin:clamp(64px,8vw,112px) auto 0}
.ending .last{
  font-size:1.16rem;line-height:1.7;font-weight:600;
  color:var(--ink);
  border-top:1px solid var(--line);
  padding-top:34px;
}
.credit{max-width:var(--w-text);margin:0 auto;padding:clamp(52px,6.6vw,86px) 0 clamp(64px,8vw,112px);text-align:center}
.credit .c-rule{width:32px;height:1px;background:var(--ink-4);margin:0 auto 28px}
.credit p{font-size:.83rem;line-height:2.1;letter-spacing:.05em;color:var(--ink-2);margin:0}
.credit p b{color:var(--ink);font-weight:600}
.credit a{
  color:var(--ink);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
  text-decoration-color:var(--ink-4);
  transition:text-decoration-color .25s var(--ease);
}
.credit a:hover{text-decoration-color:var(--ink)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1024px){
  :root{--w-text:640px}
}

@media (max-width:768px){
  :root{--pad:20px;--w-text:100%}
  body{font-size:17px}
  .masthead{top:15vh}
  .masthead h1{font-size:clamp(3rem,15vw,5rem)}
  .card{width:calc(100% - 40px);right:20px;bottom:12vh;padding:20px}
  .card-title{font-size:1.05rem}
  .story p{font-size:1.02rem}
  .lead{font-size:1.08rem !important}
  .media-duo{grid-template-columns:1fr;gap:34px}
  .gal-item{flex-basis:82vw}
  .gal-track{gap:16px}
  .figure-pair{grid-template-columns:1fr;gap:30px}
  .hl-row{flex-direction:column;gap:6px;padding:20px 0}
  .article-media .frame{aspect-ratio:4/3}
  .article-media .frame.has-img{aspect-ratio:auto;background:transparent}
  ul.plain li{font-size:.98rem}
  .ending .last{font-size:1.06rem}
}

@media (max-width:390px){
  .gal-item{flex-basis:86vw}
  .scroll-cue i{width:24px}
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .obj-inner{opacity:1 !important}
  .rv,.rv-m{opacity:1 !important;transform:none !important}
  .article-media img{opacity:1;transform:none}
  .chart-svg .bar{transform:scaleY(1)}
  .gal-item{opacity:1;transform:none}
}