:root{
    --bg:#FFFFFF; --surface:#FAFAFA; --surface2:#F4F4F2;
    --line:#E6E6E6; --hair:#EDEDED;
    --ink:#1C1C1C; --ink2:#5A5A5A; --ink3:#909090;
    --nav-bg:rgba(255,255,255,.9);
    --c1:#1F5FBF; --c2:#C0761A; --neg:#B4463F; --faint:#D8D8D8;
    --display:"DM Sans","Inter",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
    --body:"Space Grotesk","DM Sans",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
    --mono:ui-monospace,"SF Mono","Cascadia Mono",Menlo,Consolas,monospace;
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --bg:#161616; --surface:#1C1C1C; --surface2:#212121;
      --line:#2C2C2C; --hair:#242424;
      --ink:#EDEDED; --ink2:#A8A8A8; --ink3:#7A7A7A;
      --nav-bg:rgba(22,22,22,.9);
      --c1:#7FB2FF; --c2:#EDA855; --neg:#E2857E; --faint:#333333;
    }
  }
  :root[data-theme="dark"]{
    --bg:#161616; --surface:#1C1C1C; --surface2:#212121;
    --line:#2C2C2C; --hair:#242424;
    --ink:#EDEDED; --ink2:#A8A8A8; --ink3:#7A7A7A;
    --nav-bg:rgba(22,22,22,.9);
    --c1:#7FB2FF; --c2:#EDA855; --neg:#E2857E; --faint:#333333;
  }

  *{box-sizing:border-box}
  body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);
       font-size:17.5px;line-height:1.75;-webkit-font-smoothing:antialiased;
       transition:background-color .25s ease,color .25s ease}
  .wrap{max-width:1180px;margin:0 auto;padding:0 40px}
  @media(max-width:700px){.wrap{padding:0 22px}}
  a{color:inherit;text-decoration:none}
  .mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
  :focus-visible{outline:2px solid var(--ink);outline-offset:3px}
  @media (prefers-reduced-motion:reduce){*{transition:none!important}}
  .label{font-family:var(--display);font-weight:600;font-size:10.5px;letter-spacing:.22em;
         text-transform:uppercase;color:var(--ink3)}
  svg{display:block;width:100%;height:auto}

  /* nav */
  nav{position:sticky;top:0;z-index:20;background:var(--nav-bg);backdrop-filter:blur(12px);
      border-bottom:1px solid var(--line)}
  .nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
  .brand{display:flex;align-items:center;gap:12px}
  .mark{display:flex;flex-direction:column;justify-content:space-between;height:20px;width:20px;flex:none}
  .mark i{display:block;height:2.4px;background:currentColor}
  .mark i:nth-child(1){width:100%}.mark i:nth-child(2){width:70%}.mark i:nth-child(3){width:100%}
  .wm{font-family:var(--display);font-weight:600;font-size:12.5px;letter-spacing:.19em;
      text-transform:uppercase;line-height:1.1}
  .wm b{display:block;font-weight:400;font-size:8.5px;letter-spacing:.28em;color:var(--ink3);margin-top:3px}
  .nav-r{display:flex;align-items:center;gap:26px}
  .nav-l{display:flex;gap:24px;font-size:14px;color:var(--ink2)}
  .nav-l a:hover{color:var(--ink)}
  @media(max-width:860px){.nav-l{display:none}}
  .tg{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:2px;cursor:pointer;background:none}
  .tg span{display:grid;place-items:center;width:25px;height:21px;border-radius:999px;color:var(--ink3)}
  .tg svg{width:12px;height:12px}
  :root:not([data-theme="dark"]) .tg .s{background:var(--surface2);color:var(--ink)}
  :root[data-theme="dark"] .tg .m{background:var(--surface2);color:var(--ink)}
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]):not([data-theme="dark"]) .tg .s{background:transparent;color:var(--ink3)}
    :root:not([data-theme="light"]):not([data-theme="dark"]) .tg .m{background:var(--surface2);color:var(--ink)}
  }

  /* ── head ── */
  .head{padding:78px 0 0}
  .head-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:64px;align-items:end}
  @media(max-width:960px){.head-grid{grid-template-columns:1fr;gap:36px}}
  h1{font-family:var(--display);font-weight:600;font-size:clamp(38px,5.4vw,62px);
     letter-spacing:-2.4px;line-height:1.02;margin:20px 0 26px;text-wrap:balance}
  .meta{font-family:var(--mono);font-size:11.5px;color:var(--ink3);line-height:2}
  .meta b{color:var(--ink2);font-weight:400}
  .abstract{font-size:19px;color:var(--ink2);border-left:2px solid var(--ink);padding-left:24px;margin:0}

  /* findings strip */
  .strip{margin-top:74px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .strip-in{display:grid;grid-template-columns:repeat(4,1fr);gap:36px;padding:28px 0}
  @media(max-width:760px){.strip-in{grid-template-columns:1fr 1fr;gap:24px}}
  .stat b{display:block;font-family:var(--display);font-weight:600;font-size:32px;
          letter-spacing:-1.3px;line-height:1;margin-top:8px;font-variant-numeric:tabular-nums}
  .stat b.dn{color:var(--neg)}

  /* ── body ── */
  article{padding:66px 0 0}
  .col{max-width:680px;margin-left:auto;margin-right:auto}
  h2{font-family:var(--display);font-weight:600;font-size:15px;letter-spacing:.16em;
     text-transform:uppercase;color:var(--ink3);margin:64px 0 20px;
     padding-bottom:12px;border-bottom:1px solid var(--line);max-width:680px;margin-left:auto;margin-right:auto}
  h2:first-of-type{margin-top:0}
  h3{font-family:var(--display);font-weight:600;font-size:21px;letter-spacing:-.5px;margin:38px 0 12px}
  p{color:var(--ink2);margin:0 auto 22px;max-width:680px}
  em{color:var(--ink);font-style:normal;font-weight:500}

  /* wide figures break the measure */
  figure{margin:52px 0}
  figure.wide{max-width:none}
  .fbox{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
        padding:30px 34px 24px}
  figcaption{font-size:14px;color:var(--ink3);margin:16px auto 0;max-width:680px;line-height:1.6}
  figcaption b{font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
               color:var(--ink2);font-weight:400;margin-right:10px}
  .legend{display:flex;gap:22px;margin-bottom:14px;font-family:var(--mono);font-size:11px;color:var(--ink3)}
  .legend i{display:inline-block;width:13px;height:2.4px;vertical-align:middle;margin-right:7px}
  .two-fig{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}
  @media(max-width:880px){.two-fig{grid-template-columns:1fr}}
  .two-fig>div{background:var(--surface);padding:28px 30px 22px}

  /* ── interactivity ── */
  .chart{position:relative}
  .chart svg{cursor:crosshair}
  .tip{position:absolute;top:6px;pointer-events:none;opacity:0;transition:opacity .12s ease;
       background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:10px 13px;
       font-family:var(--mono);font-size:11.5px;white-space:nowrap;transform:translateX(-50%);
       box-shadow:0 3px 16px rgba(0,0,0,.10);z-index:6;min-width:132px}
  .tip.on{opacity:1}
  .tip b{display:block;color:var(--ink);font-weight:400;letter-spacing:.06em;
         text-transform:uppercase;font-size:10px;margin-bottom:7px}
  .tip span{display:flex;align-items:center;gap:8px;color:var(--ink2);line-height:1.9}
  .tip i{width:10px;height:2.5px;display:block;flex:none}
  .tip em{font-style:normal;color:var(--ink);margin-left:auto;padding-left:16px}
  .xh{stroke:var(--ink3);stroke-width:1;stroke-dasharray:3 3;opacity:0;pointer-events:none}
  .xh.on{opacity:.75}
  .fdot{opacity:0;pointer-events:none;transition:opacity .1s}
  .fdot.on{opacity:1}
  .bar{transition:opacity .12s}
  .bars:hover .bar{opacity:.42}
  .bars .bar:hover{opacity:1}

  /* table */
  tbody tr{transition:background-color .12s}
  tbody tr:hover td{background:var(--surface2)}
  .tbl{border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow-x:auto;
       max-width:680px;margin:40px auto}
  table{width:100%;border-collapse:collapse;font-family:var(--mono);font-size:13.5px;
        font-variant-numeric:tabular-nums;min-width:520px}
  th{font-family:var(--display);font-weight:600;font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;
     color:var(--ink3);text-align:right;padding:16px 18px;border-bottom:1px solid var(--line)}
  th:first-child{text-align:left}
  td{padding:13px 18px;border-bottom:1px solid var(--hair);text-align:right;color:var(--ink)}
  td:first-child{text-align:left;font-family:var(--body);font-size:15px;color:var(--ink2)}
  tr:last-child td{border-bottom:0}
  .dn{color:var(--neg)}

  /* notes */
  .notes{margin:72px auto 0;padding-top:28px;border-top:1px solid var(--line);max-width:680px}
  article h3{max-width:680px;margin-left:auto;margin-right:auto}
  .notes h4{font-family:var(--display);font-weight:600;font-size:10.5px;letter-spacing:.2em;
            text-transform:uppercase;color:var(--ink3);margin:0 0 10px}
  .notes p{font-size:14px;color:var(--ink3);margin:0 0 22px;line-height:1.7}
  .refs{font-size:14px;color:var(--ink3);line-height:1.8;padding-left:0;list-style:none;margin:0}
  .refs li{padding-left:26px;text-indent:-26px;margin-bottom:8px}

  footer{margin-top:84px;border-top:1px solid var(--line);padding:44px 0 72px;color:var(--ink3);font-size:13px}
  .f-in{display:flex;justify-content:space-between;gap:22px;flex-wrap:wrap}
  .f-l{display:flex;gap:22px;flex-wrap:wrap}
  .f-l a:hover{color:var(--ink)}

  #surf3d svg{cursor:grab;touch-action:none}
  #surf3d.grabbing svg{cursor:grabbing}
  .surf-hint{font-family:var(--mono);font-size:10.5px;color:var(--ink3);
             letter-spacing:.06em;margin-top:10px}







  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.fbox,.chart-box{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .chart svg,.fbox svg{padding:0 16px}
    .months,.btbl{padding-left:16px;padding-right:16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.fbox,.chart-box{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.fbox,.chart-box{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  figure{margin-left:0;margin-right:0}

    @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.fbox,.chart-box{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.fbox,.chart-box{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  @media (max-width: 420px){
    h1{font-size:34px;letter-spacing:-1.1px}
    .stat b{font-size:23px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }

  /* ── mobile ─────────────────────────────────────────────── */
  @media (max-width: 760px){
    .wrap{padding:0 20px}
    section, header.hero{padding:38px 0}
    .sec-head{margin-bottom:26px;padding-bottom:12px}
    h1{letter-spacing:-1.4px;line-height:1.06}
    h2{margin-bottom:22px}

    /* nav: brand + toggle on row one, links scroll on row two */
    .nav-in{height:58px;padding:0;gap:10px;align-items:center}
    .nav-r{display:flex;align-items:center;gap:10px}
    .nav-l{display:none}
    .brand{min-height:44px}
    button.tg{min-height:0;height:29px;padding:2px;display:inline-flex;align-items:center}
    .tg span{width:26px;height:23px}
    .tg svg{width:12px;height:12px}
    .read,.arrow,.more,.feat .read,.row a,.sec-head a,.f-l a{
      min-height:44px;display:inline-flex;align-items:center}
    .f-l{flex-wrap:wrap;gap:0 18px}
    .cta-btn{min-height:50px;display:flex;width:100%;align-items:center;justify-content:center;
             padding-left:26px;padding-right:26px}

    /* grid tracks must be allowed to shrink below their content width */
    .hero-grid,.feat,.rec,.net-plate,.nn-grid,.meth,.cta-in,.two-fig{
      grid-template-columns:minmax(0,1fr)}
    .hero-grid>*,.feat>*,.rec>*,.net-plate>*,.nn-grid>*,.meth>*,
    .cta-in>*,.two-fig>*,figure,.chart,.fbox,.chart-box{min-width:0;max-width:100%}
    .net-rail{max-width:none}
    figure{width:auto;margin-left:0;margin-right:0}

    /* figures go full-bleed: 375px of drawing instead of 335px */
    .chart,.months,.btbl,.chart-box,.two-fig{
      width:calc(100% + 40px);margin-left:-20px;margin-right:-20px}
    .fbox{padding:20px 14px 18px}
    .chart svg,.fbox svg{padding:0 20px;box-sizing:border-box}
    /* a nested .chart must not apply the bleed a second time */
    .fbox .chart,.two-fig .chart,.chart-box .chart{width:100%;margin-left:0;margin-right:0}
    .fbox .chart svg,.two-fig .chart svg{padding:0 20px}

    /* charts that read fine when scaled — no sideways swipe */
    .chart,.fbox,.chart-box{overflow-x:auto;-webkit-overflow-scrolling:touch}
    .rec .chart svg,.feat .chart svg,.hero-grid .chart svg,.scree svg{
      min-width:0;width:100%;height:auto}
    /* SVG type is in viewBox units; scale it up so it lands near 9-10 real px */
    .rec .chart svg text{font-size:17px}
    .feat .chart svg text{font-size:13px}
    .scree svg text{font-size:11px}
    .hero-chart svg text{font-size:19px}
    .hero-chart svg .hl{display:none}
    .hero-chart svg .pk{font-size:20px}
    .hero-chart svg .axnote{display:none}
    .hero-chart svg{margin-bottom:-9%;padding:0 4px}
    .hero-chart svg .pk{font-size:22px}
    .hero p{font-size:16.5px}
    .hero-grid{gap:26px}
    .hero figcaption{font-size:12px;line-height:1.55}
    .strip{margin-top:30px}
    .strip-in{grid-template-columns:1fr 1fr;gap:18px 12px;padding:20px 0}
    .stat .label{font-size:8.5px;letter-spacing:.09em;white-space:nowrap}
    .stat b{font-size:25px;margin-top:7px}
    .hero figcaption{margin-top:6px}
    #surf3d svg{min-width:680px}
    #surf3d svg text{font-size:16px}
    #surf3d svg{touch-action:pan-y}
    /* the paper's wide figures: viewBox 1100 and 520 scaled into 375 */
    .fbox .chart svg,.two-fig .chart svg{min-width:0;width:100%;height:auto}
    .fbox .chart svg text{font-size:32px}
    .two-fig .chart svg text{font-size:15px}

    /* genuinely dense figures still swipe — with a visible bar so it reads as such */
    .chart.net-chart svg{min-width:520px}
    .net-chart svg text{font-size:12px}
    .chart.nn-chart svg{min-width:620px}
    .nn-chart svg text{font-size:15px}
    .net-chart,.nn-chart,.months,.btbl,.col.tbl,.tbl,#surf3d{scrollbar-width:thin}
    .net-chart::-webkit-scrollbar,.nn-chart::-webkit-scrollbar,
    .months::-webkit-scrollbar,.btbl::-webkit-scrollbar{height:3px}
    .net-chart::-webkit-scrollbar-thumb,.nn-chart::-webkit-scrollbar-thumb,
    .months::-webkit-scrollbar-thumb,.btbl::-webkit-scrollbar-thumb{
      background:var(--ink3);border-radius:2px}

    /* density + legibility: nothing body-ish below 12px */
    .strip-in{grid-template-columns:1fr 1fr;gap:20px;padding:22px 0}
    .stat b{font-size:26px}
    .capsheet{grid-template-columns:1fr}
    .cap-i{padding:20px 20px 22px}
    .eq{font-size:9.5px;padding:14px 15px;overflow-x:auto;letter-spacing:-.3px}
    .arow{font-size:13px}
    .arow span:last-child{font-size:12px}
    .surf-cap,.btbl-note,.net-lede{font-size:14.5px}
    .net-h{font-size:22px}
    .net-lede{margin-bottom:26px}
    .mstats{margin-top:26px}
    .months{margin-top:34px}
    .team-lede{font-size:18px;max-width:none;margin-bottom:28px}
    .cta-h{font-size:24px;letter-spacing:-.7px}
    .cta-sec{padding:46px 0 54px}
    .feat h3{font-size:24px}
    .paper-title,.head-grid h1{letter-spacing:-1.2px}
    .abstract{font-size:16.5px;padding-left:16px}
    .row h4,.row h3{font-size:17px}
    .sec-head{flex-wrap:wrap;gap:8px}
    figcaption{font-size:12.5px}
    .scree-cap,.surf-hint,.nn-note,.team-note{font-size:12.5px}
    .ms-i span,.firm span{font-size:11px}
    table.stats td:first-child{font-size:13.5px}
    table.stats td{font-size:12.5px}

    .mstats{grid-template-columns:1fr 1fr}
    .ms-i:nth-child(3){border-left:0}
    .ms-i:nth-child(n+3){border-top:1px solid var(--line)}
  }
  @media (max-width: 420px){
    h1{font-size:33px;letter-spacing:-1.1px}
    .stat b{font-size:22px}
    .stat .label{font-size:8px;letter-spacing:.06em}
    .sheet a{font-size:22px}
    .wrap{padding:0 16px}
    .chart,.months,.btbl,.chart-box,.two-fig{width:calc(100% + 32px);margin-left:-16px;margin-right:-16px}
    .fbox{padding:18px 12px 16px}
    .chart svg,.fbox svg{padding:0 16px}
  }