:root{
  --bg:#eeece4;
  --bg-soft:#e7e4da;
  --ink:#172019;
  --muted:#6b716b;
  --green:#334337;
  --green-2:#435347;
  --white:#f7f5ef;
  --line:rgba(23,32,25,.18);
  --line-soft:rgba(23,32,25,.10);
  --max:1280px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Helvetica Neue",Helvetica,Arial,system-ui,sans-serif;
  font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;
}
a{color:inherit}
a:hover{opacity:.65}
.skip-link{position:absolute;left:-10000px;top:10px;background:#fff;padding:10px;z-index:100}
.skip-link:focus{left:10px}
.container{width:min(calc(100% - 64px),var(--max));margin:0 auto}
.masthead{
  position:sticky;top:0;z-index:20;background:rgba(238,236,228,.96);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line)
}
.masthead-inner{height:72px;display:flex;align-items:center;justify-content:space-between}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none}
.brand-mark{
  width:27px;height:27px;border:1px solid var(--ink);border-radius:50%;
  display:grid;place-items:center;font-size:11px;font-weight:600
}
.brand-name{font-size:13px;font-weight:650;letter-spacing:.19em}
.nav{display:flex;align-items:center;gap:30px}
.nav-link{text-decoration:none;color:var(--muted);font-size:13px}
.nav-link.is-active{color:var(--ink)}
.hero{padding:88px 0 74px;border-bottom:1px solid var(--line)}
.hero-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(270px,.55fr);gap:100px}
.overline{
  margin:0 0 22px;text-transform:uppercase;letter-spacing:.16em;
  font-size:10px;font-weight:650;color:var(--muted)
}
.hero h1{
  margin:0;max-width:800px;font-size:clamp(47px,6vw,76px);
  line-height:.99;font-weight:450;letter-spacing:-.052em
}
.hero-intro{font-size:19px;line-height:1.55;max-width:760px;margin:30px 0 0;color:#444b45}
.hero-side{align-self:end;padding-bottom:4px}
.definition{border-top:1px solid var(--line);padding:14px 0 21px}
.definition:last-child{padding-bottom:0}
.definition dt{
  font-size:10px;text-transform:uppercase;letter-spacing:.14em;
  color:var(--muted);margin-bottom:6px
}
.definition dd{margin:0;font-size:13px;line-height:1.55}
.statement{padding:44px 0;border-bottom:1px solid var(--line)}
.statement-inner{display:grid;grid-template-columns:180px 1fr;gap:40px}
.statement-label{font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted)}
.statement p{
  margin:0;font-size:clamp(24px,3vw,38px);line-height:1.13;
  letter-spacing:-.035em;max-width:940px
}
.section{padding:76px 0}
.section-heading{
  display:flex;align-items:end;justify-content:space-between;gap:30px;
  margin-bottom:24px
}
.section-heading h2{margin:0;font-size:30px;font-weight:500;letter-spacing:-.035em}
.section-heading p{margin:0;font-size:12px;color:var(--muted)}
.research-stack{border-top:1px solid var(--line)}
.research-card{
  display:grid;grid-template-columns:90px minmax(0,1fr) 80px;
  gap:30px;padding:30px 0;border-bottom:1px solid var(--line)
}
.research-card-no,.research-card-read{
  font-size:10px;letter-spacing:.1em;color:var(--muted);padding-top:5px
}
.research-card-read{text-align:right}
.meta-line{
  display:flex;gap:18px;flex-wrap:wrap;font-size:10px;
  text-transform:uppercase;letter-spacing:.11em;color:var(--muted)
}
.research-card h3{
  margin:10px 0 9px;max-width:900px;font-size:25px;line-height:1.14;
  letter-spacing:-.031em;font-weight:520
}
.research-card h3 a{text-decoration:none}
.research-card p{margin:0 0 13px;max-width:800px;color:#555c56;font-size:14px;line-height:1.55}
.text-link{font-size:12px;text-decoration:none;border-bottom:1px solid currentColor;padding-bottom:2px}
.text-link span{margin-left:4px}
.feature-wrap{
  border:1px solid var(--line);padding:0 30px;margin-bottom:56px;background:rgba(255,255,255,.10)
}
.research-card-featured{border-bottom:0}
.method-grid{
  display:grid;grid-template-columns:280px 1fr;border-top:1px solid var(--line)
}
.method-intro{padding:30px 30px 0 0}
.method-intro p{color:var(--muted);font-size:13px;max-width:220px}
.method-list{border-left:1px solid var(--line)}
.method-item{
  display:grid;grid-template-columns:80px 240px 1fr;gap:25px;
  padding:26px 0 26px 30px;border-bottom:1px solid var(--line)
}
.method-item .num{font-size:10px;color:var(--muted)}
.method-item h3{font-size:16px;font-weight:520;margin:0}
.method-item p{font-size:13px;color:var(--muted);margin:0;max-width:570px}
.cta-line{padding:47px 0 86px}
.cta-box{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:30px;padding:28px 0
}
.cta-box p{margin:0;font-size:15px}
.cta-box a{text-decoration:none;font-size:13px}
.page-header{padding:78px 0 48px;border-bottom:1px solid var(--line)}
.page-header-grid{display:grid;grid-template-columns:1fr 400px;gap:100px;align-items:end}
.page-header h1{
  font-size:clamp(45px,5vw,68px);line-height:1;font-weight:470;
  letter-spacing:-.05em;margin:0
}
.page-header .page-desc{margin:0;color:var(--muted);font-size:15px;line-height:1.6}
.article-header{padding:74px 0 48px;border-bottom:1px solid var(--line)}
.article-meta-top{
  display:flex;justify-content:space-between;gap:20px;margin-bottom:33px;
  color:var(--muted);font-size:10px;letter-spacing:.1em;text-transform:uppercase
}
.article-header h1{
  margin:0;max-width:1000px;font-size:clamp(39px,5vw,62px);
  line-height:1.02;font-weight:470;letter-spacing:-.048em
}
.article-deck{max-width:780px;margin:24px 0 0;font-size:17px;line-height:1.58;color:#505751}
.article-byline{
  margin-top:33px;display:flex;gap:20px;color:var(--muted);
  font-size:11px;text-transform:uppercase;letter-spacing:.08em
}
.article-layout{
  display:grid;grid-template-columns:210px minmax(0,760px);gap:78px;
  padding:55px 0 100px
}
.article-toc{font-size:11px;color:var(--muted);position:sticky;top:104px;align-self:start}
.article-toc strong{
  display:block;color:var(--ink);font-size:10px;text-transform:uppercase;
  letter-spacing:.12em;margin-bottom:15px
}
.article-toc a{display:block;text-decoration:none;padding:5px 0}
.prose{font-family:Georgia,"Times New Roman",serif;font-size:17px;line-height:1.72}
.prose>p:first-child{font-size:20px;line-height:1.58}
.prose p{margin:0 0 1.15em}
.prose h2,.prose h3{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-weight:520
}
.prose h2{
  margin:2.2em 0 .75em;font-size:29px;line-height:1.14;letter-spacing:-.035em
}
.prose h3{font-size:18px;margin:1.7em 0 .6em}
.prose ul{padding-left:1.25em}
.prose li{margin:.45em 0}
.prose code{
  font-family:"SFMono-Regular",Menlo,Consolas,monospace;font-size:.84em;
  background:var(--bg-soft);padding:.13em .32em
}
.metric-grid{
  display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);
  margin:27px 0;background:var(--line);gap:1px
}
.metric{background:var(--bg);padding:19px}
.metric .label{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;color:var(--muted);
  font-size:9px;text-transform:uppercase;letter-spacing:.1em
}
.metric .value{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:24px;
  margin-top:5px;letter-spacing:-.035em
}
.data-table{
  width:100%;border-collapse:collapse;margin:27px 0;
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:12px
}
.data-table th,.data-table td{padding:11px 9px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.data-table th{
  font-size:9px;text-transform:uppercase;letter-spacing:.11em;color:var(--muted);font-weight:600
}
.callout{
  border-left:2px solid var(--green);padding:17px 21px;margin:28px 0;
  background:var(--bg-soft);font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:13px;line-height:1.55
}
.limitations{border-top:1px solid var(--line);margin-top:52px;padding-top:4px}
.contact-block{padding:70px 0 110px}
.contact-email{
  display:inline-block;margin-top:15px;font-size:clamp(31px,5vw,55px);
  line-height:1;letter-spacing:-.045em;text-decoration:none
}
.notice{
  border:1px solid var(--line);padding:17px 19px;margin-top:35px;
  color:var(--muted);font-size:12px;max-width:700px
}
.footer{background:var(--green);color:var(--white);padding:50px 0 22px}
.footer-top{display:grid;grid-template-columns:1fr .65fr 1.2fr;gap:70px}
.brand-footer .brand-mark{border-color:var(--white)}
.footer-statement,.footer-legal p{color:rgba(247,245,239,.68);font-size:12px}
.footer-links{display:flex;flex-direction:column;gap:7px;font-size:12px}
.footer-links a,.footer-legal a{color:var(--white);text-decoration:none}
.footer-legal{font-size:12px}
.footer-bottom{
  display:flex;justify-content:space-between;gap:30px;margin-top:42px;
  padding-top:16px;border-top:1px solid rgba(247,245,239,.18);
  color:rgba(247,245,239,.48);font-size:9px;letter-spacing:.1em;text-transform:uppercase
}
@media(max-width:900px){
  .container{width:min(calc(100% - 36px),var(--max))}
  .hero-layout,.page-header-grid{grid-template-columns:1fr;gap:45px}
  .hero-side{max-width:560px}
  .statement-inner{grid-template-columns:1fr;gap:15px}
  .method-grid{grid-template-columns:1fr}
  .method-intro{padding-bottom:24px}
  .method-list{border-left:0;border-top:1px solid var(--line)}
  .article-layout{grid-template-columns:1fr}
  .article-toc{display:none}
  .footer-top{grid-template-columns:1fr 1fr}
  .footer-legal{grid-column:1/-1}
}
@media(max-width:620px){
  .container{width:min(calc(100% - 28px),var(--max))}
  .masthead-inner{height:64px}
  .nav{gap:16px}.nav-link{font-size:12px}
  .brand-name{font-size:11px}
  .hero{padding:61px 0 54px}
  .hero h1{font-size:47px}
  .hero-intro{font-size:17px}
  .section{padding:58px 0}
  .research-card{grid-template-columns:1fr;padding:24px 0;gap:10px}
  .research-card-read{display:none}
  .feature-wrap{padding:0 20px;margin-bottom:42px}
  .method-item{grid-template-columns:48px 1fr;padding-left:0}
  .method-item p{grid-column:2}
  .page-header{padding:58px 0 36px}
  .article-header{padding:52px 0 35px}
  .article-meta-top{flex-direction:column;gap:5px}
  .article-layout{padding-top:36px}
  .metric-grid{grid-template-columns:1fr 1fr}
  .footer-top{grid-template-columns:1fr}
  .footer-legal{grid-column:auto}
  .footer-bottom{flex-direction:column;gap:5px}
}
@media(max-width:430px){
  .nav-link:nth-child(2){display:none}
  .metric-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.research-figure{margin:34px 0 42px;padding:18px 0 0;border-top:1px solid var(--line)}
.research-figure img{display:block;width:100%;height:auto;background:#fff}
.research-figure figcaption{margin-top:10px;font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:11px;line-height:1.5;color:var(--muted)}