:root{
  --ink:#1f2523;
  --text:#39413e;
  --muted:#707a76;
  --line:#dfe7e2;
  --paper:#fffdf8;
  --bg:#f4f6ef;
  --soft:#eef4eb;
  --green:#346f60;
  --blue:#365f86;
  --gold:#b3862e;
  --rust:#b66f4b;
  --shadow:0 28px 70px -44px rgba(30,45,38,.55);
  --max:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Inter,Arial,sans-serif;
  line-height:1.67;
  letter-spacing:0;
  overflow-wrap:anywhere;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{
  color:var(--ink);
  font-family:"Source Serif 4",Georgia,serif;
  letter-spacing:0;
  line-height:1.16;
  margin-top:0;
}
a{color:inherit}
code{background:#edf3ef;border:1px solid var(--line);border-radius:8px;padding:2px 6px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.top{
  position:sticky;
  top:0;
  z-index:20;
  background:rgba(255,253,248,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.top .wrap{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{font-weight:900;color:var(--green);text-decoration:none;white-space:nowrap}
.nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.nav a{text-decoration:none;font-size:14px;font-weight:800;color:#53605b;border-radius:999px;padding:7px 10px;white-space:nowrap}
.nav a:hover,.nav a.active{background:#e6eee8;color:var(--ink)}
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero:before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 12% 16%,rgba(52,111,96,.18),transparent 28%),
    radial-gradient(circle at 82% 10%,rgba(179,134,46,.18),transparent 25%),
    linear-gradient(135deg,#fffdf7 0%,#eef4eb 58%,#e5eee8 100%);
}
.hero .wrap{position:relative;padding-top:76px;padding-bottom:56px}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:34px;align-items:center}
.hero.simple .wrap{max-width:920px}
.eyebrow,.kicker{margin:0 0 10px;color:var(--rust);font-size:12px;font-weight:900;letter-spacing:.14em;text-transform:uppercase}
h1{font-size:clamp(2rem,3.5vw,3.25rem);margin-bottom:18px}
.lead{font-size:1.08rem;color:#56605b;max-width:820px;margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.btn{
  display:inline-flex;
  min-height:42px;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--paper);
  padding:9px 15px;
  font-weight:900;
  text-decoration:none;
  text-align:center;
}
.btn.primary{background:var(--green);border-color:var(--green);color:white}
.btn.gold{background:var(--gold);border-color:var(--gold);color:white}
.hero-panel,.card,.link-card,.paper-card,.finding,.doi-card,.reading-steps article{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:0 18px 42px -36px rgba(30,45,38,.4);
}
.hero-panel{padding:24px;border-radius:22px;box-shadow:var(--shadow)}
.panel-title{font-size:13px;letter-spacing:.12em;text-transform:uppercase;font-weight:900;color:var(--muted);margin-bottom:16px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.stats div{background:#f8fbf6;border:1px solid var(--line);border-radius:14px;padding:13px}
.stats strong{display:block;color:var(--green);font-family:"Source Serif 4",Georgia,serif;font-size:1.4rem;line-height:1.05}
.stats span{display:block;color:var(--muted);font-size:12px;font-weight:700}
.focus-list{display:flex;flex-wrap:wrap;gap:8px}
.focus-list span,.tag,.meta span{
  display:inline-flex;
  align-items:center;
  border-radius:999px;
  border:1px solid #dae7df;
  background:#eef5ef;
  color:#41685d;
  padding:4px 9px;
  font-size:12px;
  font-weight:850;
}
.section{padding:50px 0;border-bottom:1px solid var(--line)}
.section.soft{background:var(--soft)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}
.section-head.simple{display:block}
h2{font-size:clamp(1.6rem,3vw,2.35rem);margin-bottom:8px}
.section-lead{margin:0;color:var(--muted);max-width:780px}
.purpose-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.card{padding:20px}
.card h3,.link-card h3,.finding h3,.reading-steps h3{font-size:1.1rem;margin-bottom:8px}
.card p,.link-card p,.finding p,.reading-steps p{margin:0;color:#58615d;font-size:.95rem}
.timeline{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.timeline article{padding:20px;border-left:4px solid var(--green);background:var(--paper);border-radius:8px;border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.timeline span{font-weight:900;color:var(--gold)}
.timeline h3{font-size:1.12rem;margin:6px 0 8px}
.timeline p{margin:0;color:#59635e}
.link-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.link-card{display:flex;flex-direction:column;min-height:230px;padding:20px;text-decoration:none}
.link-card span{width:42px;height:42px;display:grid;place-items:center;border-radius:50%;background:#eaf2ed;color:var(--green);font-weight:900;margin-bottom:12px}
.link-card p{margin-bottom:18px}
.link-card:after{content:"Open";margin-top:auto;color:var(--green);font-weight:900}
.controls{display:grid;grid-template-columns:1fr auto;gap:12px;margin-bottom:18px}
.controls input,.controls select{min-height:44px;border:1px solid var(--line);border-radius:999px;background:var(--paper);padding:0 16px;font:inherit;color:var(--ink)}
.papers{display:grid;gap:18px}
.paper-card{display:grid;grid-template-columns:110px 1fr;overflow:hidden}
.paper-num{display:flex;align-items:center;justify-content:center;background:#e8f0ea;border-right:1px solid var(--line);font-weight:900;color:var(--green);text-align:center;padding:18px}
.paper-body{padding:22px}
.meta{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:12px}
.paper-body h2{font-size:1.35rem;margin-bottom:14px}
.facts{display:grid;grid-template-columns:1fr;gap:8px;margin:0 0 14px}
.facts div{display:grid;grid-template-columns:132px 1fr;gap:12px;border-top:1px solid var(--line);padding-top:8px}
.facts dt{font-weight:900;color:var(--muted)}
.facts dd{margin:0}
.facts a{color:var(--blue);font-weight:800}
.paper-sections{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:14px}
.paper-sections section{background:#fbfdf8;border:1px solid var(--line);border-radius:14px;padding:14px}
.paper-sections h3{font-size:1rem;margin-bottom:6px}
.paper-sections p{margin:0;font-size:.93rem;color:#59635e}
details{margin-top:14px;border:1px solid var(--line);border-radius:14px;background:#fbfdf8;padding:12px 14px}
summary{cursor:pointer;font-weight:900;color:var(--green)}
details ol{margin:10px 0 0;padding-left:20px;color:#4f5954}
.finding-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.finding{padding:20px}
.finding span{font-size:12px;font-weight:900;color:var(--rust);text-transform:uppercase;letter-spacing:.08em}
.program-table{display:grid;gap:8px}
.program-row{display:grid;grid-template-columns:1fr 2.2fr 1.1fr .8fr;gap:12px;align-items:start;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:13px}
.program-row.head{background:#dfece4;color:var(--ink);font-weight:900}
.question-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.reading-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.reading-steps article{padding:20px}
.reading-steps span{font-size:12px;font-weight:900;color:var(--rust);text-transform:uppercase;letter-spacing:.08em}
.glossary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.glossary div{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:13px}
.glossary strong{display:block;color:var(--ink);margin-bottom:3px}
.glossary span{color:#5f6864;font-size:.93rem}
.doi-card{padding:24px}
.doi-card p{margin-bottom:0}
.doi-card a{color:var(--blue);font-weight:850}
.empty{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:14px;color:var(--muted)}
.footer{padding:28px 22px;text-align:center;color:var(--muted);background:#e8eee8}
@media(max-width:1040px){
  .hero-grid,.purpose-grid,.timeline,.reading-steps{grid-template-columns:1fr}
  .link-grid,.finding-grid,.question-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .paper-sections{grid-template-columns:1fr}
  .program-row{grid-template-columns:1fr}
}
@media(max-width:720px){
  .top .wrap{align-items:flex-start;flex-direction:column;padding-top:12px;padding-bottom:12px}
  .nav{justify-content:flex-start}
  .wrap,.hero .wrap{padding-left:16px;padding-right:16px}
  .stats,.link-grid,.finding-grid,.question-grid,.glossary{grid-template-columns:1fr}
  .controls{grid-template-columns:1fr}
  .paper-card{grid-template-columns:1fr}
  .paper-num{justify-content:flex-start;border-right:0;border-bottom:1px solid var(--line)}
  .facts div{grid-template-columns:1fr}
  .hero-actions{flex-direction:column}
  .btn{width:100%}
  h1{font-size:clamp(1.65rem,7vw,2.15rem)}
}
@media print{
  .top,.hero-actions,.controls,.footer{display:none}
  body{background:#fff}
  .hero:before{background:#fff}
  .section,.hero .wrap{padding:22px 0}
  .paper-card,.card,.finding,.link-card,.hero-panel,.reading-steps article{box-shadow:none;break-inside:avoid}
}


/* Accessibility and responsive layout corrections. */
:root{--muted:#56625c;--rust:#8f4a2d}
.skip-link{position:absolute;left:16px;top:-100px;z-index:100;background:#fff;padding:12px;color:#173e31}
.skip-link:focus{top:12px}
:focus-visible{outline:3px solid #9a5b17;outline-offset:4px}
.brand{white-space:normal}
.controls>*{min-width:0;width:100%}
.paper-body{min-width:0}
.paper-card{scroll-margin-top:140px}
.evidence-note,.archive-note{font-size:.94rem;line-height:1.6;color:#4e5b54}
.source-links{margin-top:14px!important;font-weight:700}
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;background:var(--paper)}
caption{text-align:left;margin-bottom:12px;font-weight:700}
th,td{text-align:left;padding:14px;border:1px solid var(--line);vertical-align:top}
th{background:#dfece4}
@media(max-width:720px){.top{position:relative}.paper-card{scroll-margin-top:16px}th,td{padding:9px;font-size:.85rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}