:root{
  color-scheme:light;
  --ink:#172019;
  --ink-2:#2d3831;
  --muted:#66726b;
  --muted-2:#68736d;
  --line:#e2e8e4;
  --line-strong:#d2dad5;
  --paper:#ffffff;
  --soft:#f7f9f7;
  --soft-2:#f1f5f2;
  --forest:#102219;
  --accent:#176c45;
  --accent-soft:#eaf5ee;
  --counter:#9c5b2b;
  --counter-soft:#fff4ea;
  --unknown:#78642b;
  --unknown-soft:#fbf7e7;
  --max:1240px;
  --content:900px;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:#fafbf9;
  color:var(--ink)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;min-width:320px;background:linear-gradient(180deg,#fcfdfb 0,#f7f9f7 100%);line-height:1.55;color:var(--ink);overflow-x:clip}
a{color:inherit;text-decoration-color:rgba(23,108,69,.32);text-underline-offset:3px}
button,input,textarea{font:inherit}
::selection{background:#d9f0e2;color:#102219}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(23,108,69,.35);outline-offset:3px}
.skip-link{position:absolute;left:-999px;top:12px;z-index:100;background:#fff;border:1px solid var(--line);padding:10px 14px;border-radius:9px;box-shadow:0 10px 30px rgba(21,35,27,.12)}
.skip-link:focus{left:12px}

.public-nav{min-height:70px;max-width:var(--max);margin:0 auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid rgba(226,232,228,.9)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:850;letter-spacing:-.03em}
.brand-mark{width:30px;height:30px;display:grid;grid-template-columns:1fr 1fr;gap:3px;padding:7px;border-radius:9px;background:var(--forest)}
.brand-mark i{display:block;border-radius:3px;background:#c9f96b}
.brand-mark i+ i{background:#58d9b3}
.public-nav nav{display:flex;min-width:0;align-items:center;gap:22px;font-size:13px;font-weight:650;color:#4d5952}
.public-nav nav a{text-decoration:none}
.public-nav nav a:hover,.public-nav nav a[aria-current="page"]{color:var(--ink)}
.public-nav nav a[aria-current="page"]{font-weight:800}
.public-nav .nav-cta{padding:9px 12px;border-radius:8px;background:var(--forest);color:#fff;font-weight:800}

.public-shell{max-width:var(--max);margin:0 auto;padding:64px 28px 112px}
.eyebrow{margin:0 0 9px;color:var(--accent);font-size:11px;font-weight:850;letter-spacing:.12em;text-transform:uppercase}
h1,h2,h3{margin-top:0;color:var(--ink);letter-spacing:-.035em;overflow-wrap:anywhere}
h1{font-size:clamp(40px,4.7vw,62px);line-height:1.045}
h2{font-size:clamp(25px,3vw,34px);line-height:1.12}
h3{font-size:22px;line-height:1.25}
.lede{margin:0;color:var(--muted);font-size:clamp(17px,2vw,21px);line-height:1.65}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:10px 15px;border:1px solid var(--forest);border-radius:9px;background:var(--forest);color:#fff;text-decoration:none;font-weight:800;cursor:pointer}
.button:hover{background:#1b3226}
.button:disabled{opacity:.58;cursor:not-allowed}

/* Library */
.library-hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(290px,.58fr);gap:clamp(34px,5vw,68px);align-items:end;padding:22px 0 46px}
.library-hero>*{min-width:0}
.library-hero-copy{max-width:850px}
.library-hero h1{max-width:920px;margin-bottom:22px}
.publication-boundary{padding:21px 22px;border:1px solid var(--line);border-radius:14px;background:var(--paper);box-shadow:0 10px 34px rgba(24,38,30,.035)}
.publication-boundary>span{display:block;color:var(--muted-2);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.publication-boundary>strong{display:block;margin-top:5px;font-size:17px}
.publication-boundary p{margin:10px 0 13px;color:var(--muted);font-size:13px;line-height:1.55}
.publication-boundary a{color:var(--accent);font-size:13px;font-weight:780;text-decoration:none}
.reading-model{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:2px 0 66px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.58);overflow:hidden}
.reading-model article{min-height:118px;padding:22px 24px;display:grid;grid-template-columns:34px 1fr;gap:11px;border-right:1px solid var(--line)}
.reading-model article:last-child{border-right:0}
.model-number{color:var(--muted-2);font-size:11px;font-weight:800;letter-spacing:.08em}
.reading-model strong{font-size:14px}
.reading-model p{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.5}
.library-section{margin-top:10px}
.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:22px}
.section-heading>div{max-width:620px}
.section-heading h2{margin-bottom:0}
.section-heading>p{max-width:470px;margin:0;color:var(--muted);font-size:13px;line-height:1.55}
.brief-directory{border-top:1px solid var(--line)}
.brief-row{display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:18px;align-items:center;padding:25px 14px;border-bottom:1px solid var(--line);transition:background 140ms ease}
.brief-row:hover{background:#f5f8f6}
.brief-index{color:#9aa39e;font-size:11px;font-weight:800;letter-spacing:.08em}
.brief-copy{min-width:0}
.brief-date{margin:0 0 7px;display:flex;gap:10px;align-items:center;color:var(--muted-2);font-size:11px;font-weight:700}
.brief-date span{padding-left:10px;border-left:1px solid var(--line)}
.brief-row h3{margin:0 0 7px;font-size:clamp(19px,2.2vw,26px)}
.brief-row h3 a{text-decoration:none}
.brief-row h3 a:hover{text-decoration:underline;text-decoration-thickness:1px}
.brief-row .brief-copy>p:last-child{margin:0;color:var(--muted);font-size:13px}
.brief-open{display:inline-flex;align-items:center;gap:7px;color:var(--accent);font-size:12px;font-weight:800;text-decoration:none;white-space:nowrap}
.empty-card{max-width:760px;padding:34px;border:1px solid var(--line);border-radius:16px;background:var(--paper)}
.empty-card h2{margin-bottom:12px}
.empty-card>p:not(.eyebrow){color:var(--muted);max-width:620px}
.empty-card .button{margin-top:8px}

/* Brief */
.breadcrumb{display:flex;gap:9px;align-items:center;margin-bottom:32px;color:var(--muted);font-size:12px;overflow-x:auto;white-space:nowrap}
.breadcrumb a{font-weight:750}
.brief-hero{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(270px,.55fr);gap:clamp(34px,5vw,60px);align-items:end;padding:12px 0 36px}
.brief-hero>*{min-width:0}
.brief-hero>div{max-width:850px}
.brief-hero h1{margin-bottom:20px;font-size:clamp(38px,4.5vw,58px)}
.brief-status{padding:19px 20px;border:1px solid var(--line);border-radius:14px;background:var(--paper)}
.brief-status>span{display:block;color:var(--muted-2);font-size:10px;font-weight:850;letter-spacing:.1em;text-transform:uppercase}
.brief-status strong{display:block;margin:4px 0 2px;font-size:17px}
.brief-status time{display:block;color:var(--muted);font-size:12px;font-weight:700}
.brief-status p{margin:12px 0 0;padding-top:12px;border-top:1px solid var(--line);color:var(--muted);font-size:12px;line-height:1.5}
.proof-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:8px 0 42px;border:1px solid var(--line);border-radius:13px;background:var(--paper);overflow:hidden}
.proof-strip div{min-width:0;padding:16px 18px;border-right:1px solid var(--line)}
.proof-strip div:last-child{border-right:0}
.proof-strip strong,.proof-strip span{display:block}
.proof-strip strong{font-size:20px;letter-spacing:-.04em}
.proof-strip span{margin-top:3px;color:var(--muted);font-size:11px;overflow-wrap:anywhere}
.brief-layout{display:grid;grid-template-columns:minmax(150px,178px) minmax(0,var(--content));gap:clamp(30px,4vw,52px);align-items:start;justify-content:space-between}
.brief-rail{position:sticky;top:28px;display:grid;gap:2px;padding-top:3px}
.brief-rail>span{margin-bottom:7px;color:var(--muted-2);font-size:10px;font-weight:850;letter-spacing:.1em;text-transform:uppercase}
.brief-rail a{padding:7px 0;color:var(--muted);font-size:12px;font-weight:650;text-decoration:none}
.brief-rail a:hover{color:var(--accent)}
.brief-content{min-width:0;display:grid;gap:18px}
.evidence-section{display:grid;grid-template-columns:48px minmax(0,1fr);gap:18px;padding:27px 28px;border:1px solid var(--line);border-radius:15px;background:rgba(255,255,255,.78);scroll-margin-top:24px;box-shadow:0 1px 2px rgba(20,36,27,.02)}
.evidence-section-support{border-left:3px solid #78ad8b}
.evidence-section-counter{border-left:3px solid #c6946e}
.evidence-section-unknown{border-left:3px solid #c6b46c}
.section-marker{display:grid;grid-template-rows:auto 1fr;justify-items:center;gap:8px;color:var(--muted-2);font-size:10px;font-weight:850;letter-spacing:.08em}
.section-marker i{width:1px;min-height:54px;background:var(--line)}
.section-body h2{margin-bottom:8px;font-size:clamp(22px,2.8vw,31px)}
.claim-list{margin:13px 0 0;padding:0;display:grid;gap:0;list-style:none}
.claim-list li{display:grid;grid-template-columns:8px minmax(0,1fr);gap:12px;padding:11px 0;border-top:1px solid #edf1ee}
.claim-list li:first-child{border-top:0}
.claim-list li>span{width:6px;height:6px;margin-top:8px;border-radius:50%;background:var(--accent)}
.claim-list p{margin:0;color:var(--ink-2);font-size:14px;line-height:1.62;overflow-wrap:anywhere}
.evidence-section-counter .eyebrow{color:var(--counter)}
.evidence-section-counter .claim-list li>span{background:var(--counter)}
.evidence-section-unknown .eyebrow{color:var(--unknown)}
.evidence-section-unknown .claim-list li>span{background:#b29a4b}
.single-claim,.evidence-empty{max-width:760px;margin:13px 0 0;color:var(--ink-2);font-size:14px;line-height:1.65}
.evidence-empty{color:var(--muted);font-style:italic}
.next-action{margin:2px 0 10px;padding:31px 32px;border-radius:16px;background:linear-gradient(145deg,#102219,#173225);color:#fff;scroll-margin-top:24px;box-shadow:0 18px 42px rgba(16,34,25,.12)}
.next-action .eyebrow{color:#9ce5bd}
.next-action h2{max-width:800px;margin-bottom:14px;color:#fff;font-size:clamp(27px,3.7vw,40px)}
.next-action>p{max-width:760px;margin:0;color:#d4dfd8;font-size:14px;line-height:1.62}
.next-action small{display:block;margin-top:18px;padding-top:17px;border-top:1px solid rgba(255,255,255,.14);color:#9fb0a6;font-size:11px}
.sources-card{padding:28px;border:1px solid var(--line);border-radius:15px;background:var(--paper);scroll-margin-top:24px}
.sources-card .section-heading{padding-bottom:18px;border-bottom:1px solid var(--line)}
.source-list{margin:0;padding:0;list-style:none}
.source-list li{display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;padding:19px 0;border-bottom:1px solid var(--line)}
.source-number{color:var(--muted-2);font-size:10px;font-weight:850;letter-spacing:.08em}
.source-meta{display:flex;flex-wrap:wrap;gap:6px}
.source-meta span{padding:4px 7px;border:1px solid var(--line);border-radius:999px;background:var(--soft);color:var(--muted);font-size:9px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}
.source-meta span[data-stance="supports"],.source-meta span[data-stance="support"]{border-color:#cde4d5;background:var(--accent-soft);color:var(--accent)}
.source-meta span[data-stance="challenges"],.source-meta span[data-stance="counter"],.source-meta span[data-stance="counterevidence"]{border-color:#ecd8c8;background:var(--counter-soft);color:var(--counter)}
.source-body{min-width:0}.source-body p{max-width:780px;margin:8px 0;color:var(--ink-2);font-size:13px;line-height:1.58;overflow-wrap:anywhere}
.source-body a{color:var(--accent);font-size:12px;font-weight:780;text-decoration:none}
.source-unavailable{color:var(--muted-2);font-size:11px}
.challenge-card{padding:30px;border:1px solid var(--line);border-radius:16px;background:var(--paper);display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:42px}
.challenge-copy h2{margin-bottom:11px;font-size:28px}
.challenge-copy>p:last-child{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
.challenge-card form{display:grid;gap:10px}
.challenge-card label{font-size:12px;font-weight:800;color:var(--ink-2)}
.challenge-card label small{font-weight:550;color:var(--muted-2)}
.challenge-card input,.challenge-card textarea{width:100%;min-width:0;padding:11px 12px;border:1px solid var(--line-strong);border-radius:9px;background:#fff;color:var(--ink);resize:vertical}
.challenge-card input:focus,.challenge-card textarea:focus{outline:0;border-color:#79aa8c;box-shadow:0 0 0 3px rgba(23,108,69,.09)}
.form-row{display:flex;align-items:center;gap:13px;margin-top:3px}
.form-row span{color:var(--accent);font-size:12px}
.privacy-note{padding:20px 22px;border:1px solid var(--line);border-radius:13px;background:var(--soft);display:grid;grid-template-columns:190px minmax(0,1fr);gap:24px;align-items:start}
.privacy-note div span,.privacy-note div strong{display:block}
.privacy-note div span{color:var(--muted-2);font-size:10px;font-weight:850;letter-spacing:.08em;text-transform:uppercase}
.privacy-note div strong{margin-top:4px;font-size:13px}
.privacy-note p{margin:0;color:var(--muted);font-size:12px;line-height:1.55}

.public-footer{max-width:var(--max);margin:0 auto;padding:31px 28px 44px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:10px 36px;color:var(--muted);font-size:12px}
.public-footer strong{color:var(--ink)}
.public-footer p{margin:3px 0}
.public-footer nav{display:flex;gap:14px;align-items:start}
.public-footer nav a{text-decoration:none}
.public-footer small{grid-column:1/-1;color:var(--muted-2)}

@media(max-width:900px){
  .public-nav{min-height:0;flex-wrap:wrap;gap:10px;padding-top:12px;padding-bottom:12px}
  .public-nav nav{width:100%;gap:16px;overflow-x:auto;padding-bottom:2px;scrollbar-width:thin}.public-nav nav a{flex:0 0 auto;white-space:nowrap}.public-nav .nav-cta{margin-left:auto}
  .public-shell{padding-top:45px}
  .library-hero,.brief-hero{grid-template-columns:1fr;gap:28px}
  .publication-boundary,.brief-status{max-width:620px}
  .brief-layout{grid-template-columns:1fr;gap:18px}
  .brief-rail{position:static;display:flex;gap:14px;overflow-x:auto;padding:10px 0 17px;border-bottom:1px solid var(--line)}
  .brief-rail>span{display:none}.brief-rail a{flex:0 0 auto}
}
@media(max-width:720px){
  .reading-model{grid-template-columns:1fr;margin-bottom:48px}.reading-model article{border-right:0;border-bottom:1px solid var(--line)}.reading-model article:last-child{border-bottom:0}
  .section-heading{display:block}.section-heading>p{margin-top:9px}
  .brief-row{grid-template-columns:34px minmax(0,1fr);padding-inline:4px}.brief-open{grid-column:2;margin-top:2px}
  .proof-strip{grid-template-columns:repeat(2,1fr)}.proof-strip div:nth-child(2){border-right:0}.proof-strip div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .challenge-card{grid-template-columns:1fr;gap:24px}
  .privacy-note{grid-template-columns:1fr;gap:10px}
  .public-footer{grid-template-columns:1fr}.public-footer small{grid-column:auto}
}
@media(max-width:520px){
  .public-nav,.public-shell,.public-footer{padding-left:18px;padding-right:18px}
  .public-nav nav{gap:14px;font-size:12px}.public-nav .nav-cta{padding:8px 10px}
  .public-shell{padding-bottom:78px}
  h1{font-size:40px}
  .library-hero{padding-top:10px}
  .reading-model article{padding:18px 4px}
  .brief-row{padding:20px 0}
  .brief-hero h1{font-size:37px}
  .proof-strip{grid-template-columns:1fr 1fr}.proof-strip div{padding:13px}.proof-strip strong{font-size:18px}
  .evidence-section{grid-template-columns:30px minmax(0,1fr);gap:9px;padding:22px 18px}
  .next-action,.challenge-card{padding:23px}
  .sources-card{padding:22px 18px}
  .source-list li{grid-template-columns:30px minmax(0,1fr);gap:10px}
  .form-row{align-items:flex-start;flex-direction:column}
}

/* External source data can include very long labels and hostnames. Keep it
   within the content column instead of letting it widen the document. */
.source-meta span,.source-body a{max-inline-size:100%;overflow-wrap:anywhere}

/* compact mobile evidence typography */
@media(max-width:560px){h1,.brief-hero h1{font-size:clamp(32px,9.8vw,44px);line-height:1.06}.lede{font-size:16px;line-height:1.6}}