:root{
  --bg:#F4F8FA;
  --warm:#F8FBFC;
  --ink:#102235;
  --accent:#4B83A8;
  --cryo:#1678A6;
  --cryo-deep:#0F5F8C;
  --text-cold:#102235;
  --g1:35,112,157;
  --g2:87,151,188;
  --paper:#F4F8FA;
  --paper-cold:#E2EDF3;
  --paper-raised:#FBFDFE;
  --line:rgba(16,34,53,.18);
  --muted:#587084;
  --risk:#A34F60;
  --header-h:72px;
  --rail-w:88px;
  --content-gutter:clamp(72px,7vw,120px);
  --sans:'DM Sans',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --display:'Bricolage Grotesque',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'DM Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;
}

*{ box-sizing:border-box; }
html{ scroll-padding-top:var(--header-h); }
body.home-page,
body.subpage{ margin:0; color:var(--ink); background:var(--paper); font-family:var(--sans); font-size:17px; line-height:1.6; -webkit-font-smoothing:antialiased; }
body.home-page.cold,
body.subpage.cold{ color:var(--ink); }
body.nav-open{ overflow:hidden; }
body.subpage h1,
body.subpage h2,
body.subpage h3{ margin:0; font-family:var(--display); line-height:1; letter-spacing:0; }
body.subpage p{ margin:0; }
body.subpage a{ color:inherit; text-decoration:none; }
body.subpage img{ display:block; max-width:100%; }
body.subpage :focus-visible{ outline:2px solid var(--cryo); outline-offset:3px; }

.skip-link{ position:fixed; top:10px; left:12px; z-index:120; padding:8px 12px; color:#fff; background:var(--ink); transform:translateY(-150%); }
.skip-link:focus{ transform:translateY(0); }

/* Shared navigation */
.site-header{ position:fixed; inset:0 0 auto 0; z-index:90; height:var(--header-h); display:flex; align-items:center;
  gap:32px; padding:0 clamp(22px,3.2vw,54px); color:var(--ink); background:rgba(248,251,252,.92);
  border-bottom:1px solid var(--line); -webkit-backdrop-filter:blur(14px); backdrop-filter:blur(14px); }
.site-logo{ display:inline-flex; align-items:center; width:132px; flex:0 0 auto; }
.site-logo img{ display:block; width:100%; height:auto; }
.site-nav{ display:flex; align-items:center; gap:clamp(22px,2.8vw,42px); margin-left:auto; }
.site-nav a,
.mobile-nav a{ position:relative; font-size:14px; font-weight:600; line-height:1.2; color:var(--ink); }
.site-nav a::after{ content:''; position:absolute; left:0; right:0; bottom:-10px; height:2px; background:var(--cryo);
  transform:scaleX(0); transform-origin:left; transition:transform .2s ease; }
.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after{ transform:scaleX(1); }
.story-status{ display:none; align-items:center; gap:12px; margin-left:auto; }
.story-status .mdots{ display:flex; align-items:center; gap:7px; }
.story-status .mdots i{ width:5px; height:5px; border-radius:50%; background:var(--ink); opacity:.22; transition:opacity .2s,transform .2s,background .2s; }
.story-status .mdots i.on{ opacity:1; transform:scale(1.5); background:var(--cryo); }
.story-status .temp-chip{ min-width:56px; text-align:center; font-family:var(--mono); font-size:12px; color:var(--ink); }
.menu-toggle{ display:none; position:relative; width:42px; height:42px; flex:0 0 42px; border:0; background:transparent; color:var(--ink); cursor:pointer; }
.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after{ content:''; position:absolute; left:10px; width:22px; height:2px; background:currentColor; transition:transform .2s,top .2s,opacity .2s; }
.menu-toggle::before{ top:13px; }
.menu-toggle span{ top:20px; }
.menu-toggle::after{ top:27px; }
.menu-toggle[aria-expanded="true"]::before{ top:20px; transform:rotate(45deg); }
.menu-toggle[aria-expanded="true"] span{ opacity:0; }
.menu-toggle[aria-expanded="true"]::after{ top:20px; transform:rotate(-45deg); }
.subpage .menu-toggle{ margin-left:auto; }
.mobile-nav{ display:none; position:fixed; z-index:85; inset:var(--header-h) 0 auto 0; padding:18px 24px 28px;
  background:rgba(248,251,252,.98); border-bottom:1px solid var(--line); box-shadow:0 18px 36px rgba(16,34,53,.12); }
.mobile-nav a{ display:block; padding:15px 0; border-bottom:1px solid var(--line); font-family:var(--display); font-size:24px; }
.mobile-nav a:last-child{ border-bottom:0; }

/* Bright temperature story */
body.home-page #bg{ background:var(--paper); }
body.home-page #bgglow{ background:radial-gradient(60% 58% at 82% 24%, rgba(22,120,166,.13), rgba(75,131,168,.05) 48%, transparent 78%); }
body.home-page #storyVideoScene video,
body.home-page #storyPosterFallback{ filter:saturate(.72) contrast(1.08) brightness(.98);
  -webkit-mask-image:linear-gradient(90deg, transparent 0%, rgba(0,0,0,.35) 12%, #000 28%, #000 100%);
  mask-image:linear-gradient(90deg, transparent 0%, rgba(0,0,0,.35) 12%, #000 28%, #000 100%); }
body.home-page #frost{ mix-blend-mode:multiply; }
body.home-page #tempnow{ top:calc(var(--header-h) + 18px); right:clamp(26px,3.4vw,56px); color:var(--cryo-deep); text-shadow:none;
  padding:8px 12px; border:1px solid rgba(16,34,53,.14); border-radius:4px; background:rgba(248,251,252,.88);
  -webkit-backdrop-filter:blur(10px); backdrop-filter:blur(10px); box-shadow:0 8px 24px rgba(16,34,53,.08); }

body.home-page #rail{ top:var(--header-h); width:var(--rail-w); padding:14px 0 20px; color:var(--ink);
  border-right:1px solid var(--line); background:rgba(248,251,252,.72); }
body.home-page #rail .brand{ display:none; }
body.home-page #rail .axis{ margin:8px 0 18px; }
body.home-page #rail .axis .spine{ background:rgba(16,34,53,.18); }
body.home-page #rail .axis .fill{ background:var(--cryo); }
body.home-page #rail .wp .dot{ background:var(--paper-raised); border-color:rgba(16,34,53,.48); }
body.home-page #rail .wp.active .dot{ background:var(--cryo); border-color:var(--cryo); }
body.home-page #rail .foot{ color:var(--muted); }
body.home-page #railtop{ display:none; }

body.home-page main{ margin-left:var(--rail-w); padding-top:0; }
body.home-page .scene{ min-height:100svh; padding:12vh clamp(390px,35vw,700px) 10vh var(--content-gutter); }
body.home-page .scene .depth{ top:calc(var(--header-h) + 24px); left:var(--content-gutter); color:var(--muted); opacity:1; }
body.home-page .scene h1,
body.home-page .scene h2{ color:var(--ink); }
body.home-page .s1 .inner{ width:min(620px,50vw); max-width:620px; }
body.home-page .s1 .kicker{ color:var(--cryo-deep); }
body.home-page .s1 h1 .a,
body.home-page .s2 h2 .a,
body.home-page .s4 h2 .g,
body.home-page .s5 h2 .g{ color:var(--cryo); }
body.home-page .s1 .sub,
body.home-page .s2 p,
body.home-page .s5 .sub{ color:#3F5A6F; }
body.home-page .s1 .enter{ color:var(--muted); opacity:1; }

body.home-page .s2 .grid{ max-width:760px; grid-template-columns:minmax(0,1fr) 260px; gap:46px; }
body.home-page #iceviz{ max-width:260px; }

body.home-page .s3 .inner,
body.home-page .s4 .inner,
body.home-page .s5 .inner{ max-width:780px; }
body.home-page .s3 .inner::before{ content:none; display:none; }
body.home-page .s3 .lab{ color:var(--cryo-deep); }
body.home-page .s3 .dmso{ border-top-color:var(--line); }
body.home-page .s3 .barrier{ border-bottom-color:var(--line); }
body.home-page .s3 .barrier .no{ color:var(--risk); }
body.home-page .s3 .barrier .h{ color:var(--ink); }
body.home-page .s3 .barrier .c{ color:#8C384B; opacity:1; }
body.home-page .s3 .barrier .d{ color:#496276; }

body.home-page .s4 .sig{ border-color:var(--line); background:rgba(255,255,255,.55); box-shadow:0 22px 60px rgba(16,34,53,.08); }
body.home-page .s4 .sig .half{ background:rgba(251,253,254,.84); }
body.home-page .s4 .sig .half + .half{ border-left:1px solid var(--line); }
body.home-page .s4 .sig .bad .tag{ color:var(--risk); }
body.home-page .s4 .sig .good .tag{ color:var(--cryo-deep); }
body.home-page .s4 .chip{ color:var(--ink); border-color:var(--line); background:rgba(251,253,254,.72); }

body.home-page .s5::before{ background:linear-gradient(90deg, rgba(244,248,250,.98), rgba(244,248,250,.82) 68%, rgba(244,248,250,.12)); }
body.home-page .s5 .visgrid{ border-color:var(--line); background:var(--line); }
body.home-page .s5 .visgrid .v{ background:rgba(251,253,254,.9); -webkit-backdrop-filter:blur(8px); backdrop-filter:blur(8px); }
body.home-page .s5 .visgrid .vk{ color:var(--cryo-deep); }
body.home-page .s5 .visgrid .vl{ color:var(--muted); }
body.home-page .s5 .foot{ border-top-color:var(--line); }
body.home-page .s5 .foot .team{ color:#496276; }

/* Documentary photography remains dark and factual. */
body.home-page .photo-proof{ color:#F2F8FB; background:#071321; }
body.home-page .photo-proof h2{ color:#F7FBFD; }
body.home-page .photo-proof--countdown img{ object-position:center 40%; }
body.home-page .photo-proof--lab img{ object-position:center 34%; }
body.home-page .photo-proof--infrastructure img{ object-position:center 42%; }
@media(min-width:1100px){
  body.home-page .photo-proof{ height:auto; min-height:680px; aspect-ratio:16/9; max-height:880px; }
  body.home-page .photo-proof img{ object-fit:cover; }
  body.home-page .photo-proof--countdown .proof-inner,
  body.home-page .photo-proof--lab .proof-inner{ padding-left:52%; }
  body.home-page .photo-proof--countdown h2,
  body.home-page .photo-proof--lab h2{ max-width:12ch; font-size:clamp(38px,3.8vw,58px); }
  body.home-page .photo-proof--infrastructure h2{ max-width:13ch; }
}

/* Shared footer */
.site-footer{ position:relative; z-index:4; margin-left:var(--rail-w); color:#DCEAF1; background:#102235; }
.footer-inner{ max-width:1240px; margin:0 auto; padding:68px clamp(24px,6vw,88px) 28px; }
.footer-top{ display:flex; justify-content:space-between; gap:64px; padding-bottom:54px; }
.footer-brand{ max-width:330px; }
.footer-brand img{ display:block; width:132px; filter:brightness(0) invert(1); opacity:.96; }
.footer-brand p{ margin-top:22px; color:#AFC5D3; max-width:28ch; }
.footer-links{ display:grid; grid-template-columns:repeat(2,minmax(150px,1fr)); gap:14px 54px; align-content:start; }
.footer-links a{ color:#EAF3F7; font-weight:600; }
.footer-links a:hover{ color:#8ED6F0; }
.footer-bottom{ display:flex; justify-content:space-between; gap:24px; padding-top:24px; border-top:1px solid rgba(220,234,241,.18);
  font-family:var(--mono); font-size:11px; color:#8EA9B9; text-transform:uppercase; }

/* Subpages */
body.subpage{ --rail-w:0px; }
body.subpage main.page-main{ margin:0; padding-top:var(--header-h); }
.page-hero{ position:relative; min-height:72svh; display:flex; align-items:flex-end; overflow:hidden; isolation:isolate; color:#fff; background:#102235; }
.page-hero > img{ position:absolute; inset:0; z-index:-2; width:100%; height:100%; object-fit:cover; }
.page-hero::before{ content:''; position:absolute; inset:0; z-index:-1; background:linear-gradient(180deg, rgba(7,19,33,.08), rgba(7,19,33,.24) 42%, rgba(7,19,33,.9)); }
.page-hero--science > img{ object-position:center top; }
.page-hero--team > img{ object-position:center 45%; }
.page-hero--faq > img{ object-position:18% center; }
.page-hero__inner{ width:min(1200px,100%); margin:0 auto; padding:0 clamp(24px,7vw,110px) 9vh; }
.page-kicker{ display:block; margin-bottom:18px; font-family:var(--mono); font-size:12px; text-transform:uppercase; color:#9AD9F1; }
.page-hero h1{ max-width:13ch; color:#fff; font-size:clamp(58px,7vw,108px); font-weight:800; }
.page-hero p{ max-width:54ch; margin-top:24px; color:#C9DBE5; font-size:20px; }
.page-section{ padding:clamp(72px,10vw,150px) clamp(24px,7vw,110px); background:var(--paper); }
.page-section--cold{ background:var(--paper-cold); }
.page-section--ink{ color:#EAF3F7; background:#102235; }
.page-container{ max-width:1200px; margin:0 auto; }
.section-label{ display:block; margin-bottom:20px; font-family:var(--mono); font-size:12px; text-transform:uppercase; color:var(--cryo-deep); }
.page-section--ink .section-label{ color:#9AD9F1; }
.page-section h2{ max-width:18ch; color:var(--ink); font-size:clamp(42px,5vw,72px); }
.page-section--ink h2{ color:#fff; }
.page-lead{ max-width:60ch; margin-top:28px; color:#496276; font-size:clamp(18px,2vw,23px); }
.page-section--ink .page-lead{ color:#B8CDD8; }
.editorial-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:0; margin-top:64px; border-top:1px solid var(--line); }
.editorial-item{ padding:28px 30px 28px 0; border-bottom:1px solid var(--line); }
.editorial-item + .editorial-item{ padding-left:30px; border-left:1px solid var(--line); }
.editorial-item .index{ font-family:var(--mono); color:var(--cryo-deep); }
.editorial-item h3{ margin-top:24px; color:var(--ink); font-size:26px; }
.editorial-item p{ margin-top:14px; color:#587084; }
.temperature-list{ margin-top:58px; border-top:1px solid var(--line); }
.temperature-row{ display:grid; grid-template-columns:120px 1fr 1.3fr; gap:32px; padding:28px 0; border-bottom:1px solid var(--line); align-items:baseline; }
.temperature-row .temp{ font-family:var(--display); font-size:28px; font-weight:700; color:var(--cryo-deep); }
.temperature-row strong{ font-family:var(--display); font-size:22px; }
.temperature-row span:last-child{ color:#587084; }
.science-image-band{ display:grid; grid-template-columns:1.15fr .85fr; min-height:620px; background:#0A2033; }
.science-image-band img{ width:100%; height:100%; object-fit:cover; }
.science-image-band__copy{ display:flex; flex-direction:column; justify-content:center; padding:clamp(52px,7vw,110px); color:#DCEAF1; }
.science-image-band__copy h2{ color:#fff; font-size:clamp(42px,5vw,70px); }
.science-image-band__copy p{ margin-top:26px; color:#ABC3D1; max-width:46ch; }
.team-list{ margin-top:62px; border-top:1px solid var(--line); }
.team-row{ display:grid; grid-template-columns:90px 1.2fr 1fr; gap:30px; padding:32px 0; border-bottom:1px solid var(--line); align-items:baseline; }
.team-row .team-index{ font-family:var(--mono); color:var(--cryo-deep); }
.team-row h3{ font-size:30px; }
.team-row p{ color:#587084; }
.faq-list{ max-width:920px; margin-top:58px; border-top:1px solid var(--line); }
.faq-list details{ border-bottom:1px solid var(--line); }
.faq-list summary{ position:relative; padding:28px 58px 28px 0; list-style:none; cursor:pointer; font-family:var(--display); font-size:24px; font-weight:700; }
.faq-list summary::-webkit-details-marker{ display:none; }
.faq-list summary::after{ content:'+'; position:absolute; right:0; top:24px; width:32px; height:32px; text-align:center; font-family:var(--mono); color:var(--cryo-deep); }
.faq-list details[open] summary::after{ content:'−'; }
.faq-list details p{ max-width:64ch; padding:0 56px 30px 0; color:#587084; }
.legal-page{ min-height:72svh; padding:calc(var(--header-h) + 80px) clamp(24px,7vw,110px) 110px; }
.legal-page .page-container{ max-width:900px; }
.legal-page h1{ font-size:clamp(54px,7vw,94px); }
.legal-page .legal-status{ margin-top:34px; padding:22px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); color:#587084; }
.legal-page h2{ margin-top:54px; font-size:28px; }
.legal-page p{ margin-top:14px; color:#587084; }

@media(max-width:980px){
  :root{ --header-h:64px; --rail-w:0px; --content-gutter:24px; }
  .site-header{ gap:14px; padding:0 18px; }
  .site-logo{ width:112px; }
  .site-nav{ display:none; }
  .story-status{ display:flex; }
  .menu-toggle{ display:block; }
  .mobile-nav.is-open{ display:block; }
  body.home-page #rail,
  body.home-page #tempnow{ display:none; }
  body.home-page main{ margin-left:0; padding-top:var(--header-h); }
  body.home-page #storyVideoScene{ background:#1E2731; }
  body.home-page #storyVideoScene::after{
    content:''; position:absolute; z-index:2; inset:82% 0 0; pointer-events:none;
    background:linear-gradient(180deg,rgba(30,39,49,0),#1E2731 46%,#1E2731 100%);
  }
  body.home-page #storyVideoScene video,
  body.home-page #storyPosterFallback{
    -webkit-mask-image:none;
    mask-image:none;
  }
  body.home-page .scene{ min-height:100svh; padding:12vh 24px 10vh; }
  body.home-page .scene .depth{ top:28px; left:24px; }
  body.home-page .s1{ align-items:flex-start; }
  body.home-page .s1 .inner{ width:auto; max-width:none; padding-top:210px; }
  body.home-page .s1::before{ display:none; background:none; }
  body.home-page .s2 .grid{ grid-template-columns:1fr; gap:34px; max-width:none; }
  body.home-page #iceviz{ width:min(76vw,280px); max-width:280px; }
  body.home-page .s3 .inner::before{ inset:-5% -6%; background:linear-gradient(180deg,rgba(244,248,250,.65),rgba(244,248,250,.92) 32%,rgba(244,248,250,.98)); }
  body.home-page .s3 .barrier .h{ color:var(--ink); }
  body.home-page .s4 .sig .half + .half{ border-left:0; border-top:1px solid var(--line); }
  body.home-page .s5::before{ background:linear-gradient(180deg,rgba(244,248,250,.72) 0%,rgba(244,248,250,.96) 32%,rgba(244,248,250,.96) 68%,rgba(244,248,250,.72) 82%,rgba(244,248,250,.18) 100%); }
  body.home-page .photo-proof--countdown img{ object-position:18% center; }
  body.home-page .photo-proof--lab img{ object-position:43% center; }
  body.home-page .photo-proof--infrastructure img{ object-position:70% center; }
  .site-footer{ margin-left:0; }
  .footer-top{ flex-direction:column; gap:44px; }
  .footer-links{ grid-template-columns:1fr 1fr; }
  .page-hero{ min-height:70svh; }
  .page-hero h1{ font-size:54px; }
  .editorial-grid{ grid-template-columns:1fr; }
  .editorial-item,
  .editorial-item + .editorial-item{ padding:26px 0; border-left:0; }
  .temperature-row{ grid-template-columns:90px 1fr; gap:14px 24px; }
  .temperature-row span:last-child{ grid-column:2; }
  .science-image-band{ grid-template-columns:1fr; }
  .science-image-band img{ min-height:460px; }
  .team-row{ grid-template-columns:54px 1fr; }
  .team-row p{ grid-column:2; }
}

@media(max-width:520px){
  .story-status .mdots{ display:none; }
  .page-hero h1{ font-size:44px; }
  .page-hero p{ font-size:17px; }
  .page-section{ padding:72px 24px; }
  .page-section h2{ font-size:40px; }
  .footer-inner{ padding:54px 24px 24px; }
  .footer-links{ grid-template-columns:1fr; }
  .footer-bottom{ flex-direction:column; }
  .temperature-row{ grid-template-columns:1fr; }
  .temperature-row span:last-child{ grid-column:1; }
  .team-row{ grid-template-columns:1fr; }
  .team-row p{ grid-column:1; }
  .science-image-band img{ min-height:360px; }
}

@media(prefers-reduced-motion:reduce){
  .site-nav a::after,
  .menu-toggle,
  .mobile-nav{ transition:none; }
}