/* Companion site for the working paper. One radius (6px, 4px nested), no cards.
   Hierarchy comes from type and space; grouping from hairlines.
   Type: eight sizes (--t-*) and two heading clamps; headings are weight 500, body 400.
   Colour: ink does the work, including the main button. The accent marks the highlighted
   model, focus and link hover, and nothing else. */

@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;
  src:url(fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Sans";font-style:italic;font-weight:400;font-display:swap;
  src:url(fonts/ibm-plex-sans-latin-400-italic.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/ibm-plex-sans-latin-500-normal.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:600;font-display:swap;
  src:url(fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;
  src:url(fonts/ibm-plex-sans-greek-400-normal.woff2) format("woff2");
  unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;
  src:url(fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  color-scheme:light;
  --bg:#f6f7f8; --tint:#eceef1; --ink:#15181c; --ink-2:#474e56; --ink-3:#626a74;
  --line:#dfe2e6; --line-2:#c5cad1; --accent:#c23b1b; --ink-hover:#2e333a;
  --t-xs:.75rem; --t-sm:.8125rem; --t-ui:.875rem; --t-body:1rem; --t-lead:1.1875rem;
  --t-h3:1.3125rem; --t-h2:1.75rem; --t-stat:2rem;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,monospace;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#111316; --tint:#1a1d21; --ink:#e9ebee; --ink-2:#aeb4bc; --ink-3:#8b929b;
    --line:#262a30; --line-2:#3a4048; --accent:#f07a55; --ink-hover:#cfd3d8;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#111316; --tint:#1a1d21; --ink:#e9ebee; --ink-2:#aeb4bc; --ink-3:#8b929b;
  --line:#262a30; --line-2:#3a4048; --accent:#f07a55; --ink-hover:#cfd3d8;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1rem/1.6 var(--sans);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure,pre{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:underline;text-decoration-color:var(--line-2);
  text-decoration-thickness:1px;text-underline-offset:.2em;transition:text-decoration-color .15s}
a:hover{text-decoration-color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}
code,.mono{font-family:var(--mono);font-size:.92em}
strong{font-weight:600}
[hidden]{display:none!important}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.wrap{max-width:72.5rem;margin-inline:auto;padding-inline:1.5rem}
.narrow{max-width:46rem}

/* header */
.top{border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;min-height:4rem}
.brand{font-weight:500;letter-spacing:-.01em;text-decoration:none;white-space:nowrap}
.nav{display:flex;gap:1.75rem;font-size:var(--t-ui)}
.nav a{color:var(--ink-2);text-decoration:none;padding-block:.375rem;white-space:nowrap;transition:color .15s}
.nav a:hover{color:var(--ink)}
.nav a[aria-current="page"]{color:var(--ink);font-weight:500;text-decoration:underline;
  text-decoration-color:var(--ink);text-decoration-thickness:1.5px;text-underline-offset:.5em}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;height:2.75rem;padding-inline:1.125rem;
  border:0;border-radius:6px;font:500 var(--t-ui)/1 var(--sans);text-decoration:none;white-space:nowrap;cursor:pointer;
  transition:background-color .15s,box-shadow .15s,transform .1s}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--ink);color:var(--bg)}
.btn.primary:hover{background:var(--ink-hover)}
.btn.quiet{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line-2)}
.btn.quiet:hover{box-shadow:inset 0 0 0 1px var(--ink-3)}
.btn.small{height:2rem;padding-inline:.75rem;font-size:var(--t-sm)}
.cta{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1.5rem;margin-top:1.75rem}
.cta a:not(.btn){font-size:var(--t-ui);font-weight:500;padding-block:.625rem;white-space:nowrap}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:4rem;align-items:center;
  padding-block:4.5rem 3.5rem}
.eyebrow{font:400 var(--t-sm)/1.4 var(--mono);color:var(--ink-3)}
h1{font-size:clamp(2.125rem,1.1rem + 3.2vw,3rem);line-height:1.06;letter-spacing:-.025em;font-weight:500;
  margin:.875rem 0 1.25rem;text-wrap:balance}
.lede{font-size:var(--t-lead);line-height:1.5;color:var(--ink-2);max-width:33rem;text-wrap:pretty}
.herofig figcaption{display:flex;flex-direction:column;gap:.125rem;margin-bottom:.75rem}
.herofig figcaption strong{font-size:var(--t-body);font-weight:500}
.herofig figcaption a{text-decoration:none}
.herofig figcaption a:hover{text-decoration:underline;text-decoration-color:var(--accent)}
.herofig figcaption span{font-size:var(--t-sm);color:var(--ink-3)}

/* cohort numbers and invitation */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:2rem;padding-block:1.75rem;
  border-top:1px solid var(--line)}
.stat b{display:block;font-weight:500;font-size:var(--t-stat);line-height:1.1;letter-spacing:-.02em}
.stat span{display:block;margin-top:.25rem}
.stat small{display:block;font-size:var(--t-sm);color:var(--ink-3);line-height:1.45}
.invite{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.5rem 2rem;
  padding-block:1.25rem;border-top:1px solid var(--line);color:var(--ink-2)}
.invite a{color:var(--ink);font-weight:500;white-space:nowrap}

/* sections */
.sec{padding-block:4rem 0}
.sec + .sec{padding-top:4.5rem}
.sec + .sec > .wrap > h2{border-top:1px solid var(--line);padding-top:3.5rem}
h2{font-size:var(--t-h2);line-height:1.15;letter-spacing:-.018em;font-weight:500}
h3{font-size:var(--t-h3);line-height:1.2;letter-spacing:-.012em;font-weight:500}
h2 + p{margin-top:.875rem}
.lead{font-size:var(--t-lead);line-height:1.5;color:var(--ink-2);max-width:46rem;text-wrap:pretty}
.bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem 1.5rem}
.jump{display:flex;flex-wrap:wrap;gap:.25rem 1.25rem;font-size:var(--t-ui);margin-top:1.75rem}
.jump a{color:var(--ink-2)}
.ctl{display:inline-flex;align-items:center;gap:.5rem;font-size:var(--t-ui);color:var(--ink-2)}
select{font:inherit;font-size:var(--t-ui);color:var(--ink);background:var(--bg);border:0;border-radius:6px;
  box-shadow:inset 0 0 0 1px var(--line-2);height:2rem;padding:0 .5rem}
html:not(.js) .needs-js{display:none}

.study{margin-top:2.5rem;padding-top:2.5rem;border-top:1px solid var(--line);scroll-margin-top:1rem}
.finding{margin-top:.75rem;font-size:var(--t-lead);line-height:1.5;max-width:46rem;text-wrap:pretty}
.setup{margin-top:.75rem;color:var(--ink-2);max-width:46rem;text-wrap:pretty}
.study .bar{margin-top:1.75rem}

/* segmented control */
.seg{display:inline-flex;max-width:100%;overflow-x:auto;background:var(--tint);border-radius:6px;padding:2px;gap:2px}
.seg button{appearance:none;border:0;background:none;font:400 var(--t-ui)/1 var(--sans);color:var(--ink-2);
  min-height:2rem;padding:0 .75rem;border-radius:4px;cursor:pointer;white-space:nowrap;transition:color .15s,background-color .15s}
.seg button:hover{color:var(--ink)}
.seg button[aria-pressed="true"]{background:var(--bg);color:var(--ink);font-weight:500;box-shadow:0 0 0 1px var(--line-2)}

/* tables */
.panel{margin-top:1rem}
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:var(--t-ui);line-height:1.4}
caption{caption-side:top;text-align:left;font-weight:500;padding:.5rem 0}
.herofig caption,.nocap caption,.js .panel caption{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
th,td{padding:.5625rem .75rem;text-align:left;vertical-align:middle}
th:first-child,td:first-child{padding-left:0}
th:last-child,td:last-child{padding-right:0}
thead th{font-weight:500;font-size:var(--t-sm);color:var(--ink-3);vertical-align:bottom;white-space:nowrap;
  border-bottom:1px solid var(--line-2)}
thead tr.grp th{border-bottom:0;padding-bottom:0;color:var(--ink-2)}
tbody tr{border-bottom:1px solid var(--line)}
tbody tr:last-child{border-bottom:0}
tbody th{font-weight:500;white-space:nowrap}
tbody tr.sub th{font-weight:400;font-size:var(--t-sm);color:var(--ink-3);padding-top:1rem;padding-bottom:.375rem}
tbody tr.sub{border-bottom:1px solid var(--line-2)}
.n{text-align:right;white-space:nowrap}
td.n{font-family:var(--mono);font-size:var(--t-sm);font-variant-numeric:tabular-nums}
td.n .ci{color:var(--ink-3)}
td.t{color:var(--ink-2)}
.sort{all:unset;cursor:pointer;display:inline-flex;align-items:center;gap:.25rem;min-height:1.5rem}
.sort:hover{color:var(--ink)}
.sort:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}
th[aria-sort="ascending"] .sort::after{content:"\2191"}
th[aria-sort="descending"] .sort::after{content:"\2193"}
th[aria-sort] .sort{color:var(--ink)}

/* plot column: marks on a shared axis */
.pc{width:40%;min-width:16rem}
th.pc{white-space:normal}
.axt{display:block;margin-bottom:.375rem}
.axis{position:relative;height:1rem;margin-inline:.5rem}
.axis span{position:absolute;top:0;transform:translateX(-50%);font:400 var(--t-xs)/1 var(--mono);color:var(--ink-3)}
.plot{position:relative;height:1.5rem;margin-inline:.5rem}
.plot i{position:absolute;display:block}
.plot .g{top:-.5625rem;bottom:-.5625rem;width:1px;margin-left:-.5px;background:var(--line)}
.plot .z{background:var(--line-2)}
.plot .wh{top:50%;height:1.5px;margin-top:-.75px;background:var(--ink)}
.mk{width:9px;height:9px;border:1.5px solid var(--ink);background:var(--bg);border-radius:50%}
.plot .mk{top:50%;margin:-4.5px 0 0 -4.5px;box-shadow:0 0 0 2px var(--bg)}
.mk.on{background:var(--ink)}
.mk.d{width:8px;height:8px;border-radius:1px;transform:rotate(45deg)}
.plot .mk.d{margin:-4px 0 0 -4px}
.plot.two{height:1.875rem}
.plot.two .a{top:30%}
.plot.two .b{top:70%}
tr.hl .wh{background:var(--accent)}
tr.hl .mk{border-color:var(--accent)}
tr.hl .mk.on{background:var(--accent)}
tr.hl th{font-weight:600}
.key{display:flex;flex-wrap:wrap;gap:.375rem 1.5rem;margin-top:.875rem;font-size:var(--t-sm);color:var(--ink-2)}
.key span{display:inline-flex;align-items:center;gap:.4375rem}
.key .mk{display:inline-block;flex:none}
.key .mk.d{margin-inline:1px}
.note{margin-top:.75rem;font-size:var(--t-sm);color:var(--ink-2);max-width:46rem}
table.fig th{font-weight:400;font-size:var(--t-ui);color:var(--ink)}
table.fig thead th{font-size:var(--t-sm);color:var(--ink-3)}
table.fig .pc{width:68%;min-width:0}

/* definition rows (approach, paper meta, limits) */
.rows{margin-top:1.75rem;border-top:1px solid var(--line)}
.rows > div{display:grid;grid-template-columns:minmax(0,15rem) minmax(0,1fr);gap:.5rem 2.5rem;padding-block:1.125rem;
  border-bottom:1px solid var(--line)}
.rows > div:last-child{border-bottom:0}
.rows dt{font-weight:500}
.rows dd{color:var(--ink-2);max-width:44rem;text-wrap:pretty}
.rows dd > * + *{margin-top:.75rem}
details summary{cursor:pointer;color:var(--ink);font-size:var(--t-ui);width:fit-content;
  text-decoration:underline;text-decoration-color:var(--line-2);text-underline-offset:.2em}
details summary:hover{text-decoration-color:var(--accent)}
details[open] summary{margin-bottom:.75rem}
.list{margin-top:1.25rem;max-width:46rem}
.list li{position:relative;padding-left:1.25rem;color:var(--ink-2)}
.list li + li{margin-top:.5rem}
.list + p{margin-top:1rem}
.list li::before{content:"";position:absolute;left:0;top:.8em;width:.5rem;height:1px;background:var(--ink-3)}
.sec h2 ~ h3{margin-top:3.5rem}
.sec h2 + h3{margin-top:2rem}
.sec h3 + .rows{margin-top:1.25rem}
.close{margin-top:3rem;padding-top:2rem;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;gap:1rem 2rem}
.close p{max-width:36rem;color:var(--ink-2)}

/* inner pages */
.pagehead{padding-block:4rem 2.5rem}
.pagehead h1{font-size:clamp(1.875rem,1.2rem + 2.2vw,2.5rem);max-width:46rem}
.pagehead .sub{font-size:var(--t-lead);line-height:1.5;color:var(--ink-2);max-width:42rem;text-wrap:pretty}
.block{padding-block:2.5rem;border-top:1px solid var(--line)}
.block h2{font-size:var(--t-h3);line-height:1.2;letter-spacing:-.012em}
.block p{max-width:46rem;text-wrap:pretty}
.block p + p{margin-top:.875rem}
.block h2 + p,.block h2 + .tw,.block h2 + pre,.block h2 + .cite{margin-top:1rem}
.abstract p{line-height:1.65}
.muted{color:var(--ink-2)}
.small{font-size:var(--t-ui)}
.block .after{margin-top:1.25rem}
pre{background:var(--tint);border-radius:6px;padding:.875rem 1rem;overflow-x:auto;font:400 var(--t-sm)/1.6 var(--mono);
  white-space:pre}
pre.wrapit{white-space:pre-wrap;overflow-wrap:anywhere}
.cite{max-width:46rem}
.cite + .cite{margin-top:1.5rem}
.cite .bar{margin-bottom:.5rem}
.cite h3{font-size:var(--t-ui);line-height:1.6;letter-spacing:0;font-weight:500;color:var(--ink-2)}
.hash{font-family:var(--mono);font-size:var(--t-xs);color:var(--ink-3)}

/* corrections */
.cgrp{margin-top:2.5rem}
.cgrp + p{margin-top:2rem;color:var(--ink-2)}
.cgrp h3{font-size:var(--t-body);line-height:1.6;letter-spacing:0;font-weight:500;display:flex;gap:.625rem;align-items:baseline}
.cgrp h3 span{font:400 var(--t-sm) var(--mono);color:var(--ink-3)}
.corrs{margin-top:.75rem;border-top:1px solid var(--line)}
.corr{display:grid;grid-template-columns:2.5rem minmax(0,11rem) minmax(0,1fr);gap:.25rem 1.5rem;padding-block:1.125rem;
  border-bottom:1px solid var(--line);scroll-margin-top:1rem}
.corr .no{font:400 var(--t-sm)/1.7 var(--mono);color:var(--ink-3)}
.corr .where{font-size:var(--t-ui);line-height:1.55}
.corr .where small{display:block;font-size:var(--t-sm);color:var(--ink-3)}
.corr dl{display:grid;grid-template-columns:8.5rem minmax(0,1fr);gap:.375rem 1rem}
.corr dt{font-size:var(--t-sm);color:var(--ink-3);padding-top:.1875rem}
.corr dd{max-width:40rem}
.corr dd.was{color:var(--ink-2)}

/* footer */
.foot{margin-top:5rem;border-top:1px solid var(--line);font-size:var(--t-ui);color:var(--ink-2)}
.foot .wrap{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:1.5rem 3rem;padding-block:2rem 3rem;align-items:start}
.foot p{max-width:40rem}
.foot p + p{margin-top:.5rem}
.foot .seg button{min-height:1.75rem;font-size:var(--t-sm)}

@media (max-width:60rem){
  .hero{grid-template-columns:minmax(0,1fr);gap:2.5rem;padding-block:3rem 2.5rem}
  .corr{grid-template-columns:2rem minmax(0,1fr)}
  .corr dl{grid-column:2}
}
@media (max-width:40rem){
  .wrap{padding-inline:1rem}
  .top .wrap{flex-direction:column;align-items:flex-start;justify-content:center;gap:0;min-height:0;padding-block:.5rem .25rem}
  .nav{gap:1.125rem;max-width:100%;overflow-x:auto}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:1.5rem}
  .sec{padding-top:3rem}
  .sec + .sec{padding-top:3.5rem}
  .sec + .sec > .wrap > h2{padding-top:2.5rem}
  .sec h2 ~ h3{margin-top:2.5rem}
  .sec h2 + h3{margin-top:1.5rem}
  .rows > div{grid-template-columns:minmax(0,1fr)}
  .foot .wrap{grid-template-columns:minmax(0,1fr)}
  .corr dl{grid-template-columns:minmax(0,1fr);gap:0}
  .corr dd + dt{margin-top:.5rem}
  tbody th{position:sticky;left:0;background:var(--bg);padding-right:.75rem}
  .pc{min-width:13rem}
  table.fig .pc{width:62%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto!important}
}
@media print{
  .top,.foot,.seg,.needs-js,.cta{display:none}
  .panel[hidden]{display:block!important}
  .js .panel caption{position:static;width:auto;height:auto;clip-path:none}
}