:root{
  --gov-blue:#1351b4;
  --gov-blue-2:#0c326f;
  --gov-blue-3:#071d41;
  --gov-green:#168821;
  --gov-yellow:#ffcd07;
  --gov-light:#f5f7fa;
  --gov-surface:#ffffff;
  --gov-alt:#eef4ff;
  --ink:#1f2a37;
  --muted:#4f5d73;
  --line:#d9e2ec;
  --line-strong:#b7c6d8;
  --focus:#ffcd07;
  --danger:#c41f1f;
  --success:#168821;
  --warn:#9a6700;
  --e0:#f1c40f;
  --e1:#3aa0ff;
  --e2:#168821;
  --bw:#0c6bcb;
  --bb:#1c7c54;
  --b:#1351b4;
  --max:1240px;
  --shadow:0 10px 30px rgba(7,29,65,.08);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:105px}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--gov-light);color:var(--ink);line-height:1.6;font-size:16px}
a{color:var(--gov-blue)}
a:hover{text-decoration:none}
button,input,select{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:12px;top:-100px;background:#fff;color:var(--gov-blue-3);padding:12px 16px;border-radius:10px;z-index:1000;box-shadow:var(--shadow)}
.skip-link:focus{top:12px}
.topnote{background:var(--gov-blue-3);color:#fff;font-size:12px}
.topnote-inner{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;padding:10px 24px}
.topnote-badge{background:#ffffff1f;border:1px solid #ffffff3d;padding:4px 8px;border-radius:999px;font-weight:700}
.dotsep{opacity:.75}
.flag-bar{display:flex;height:8px}
.flag-bar .g{background:var(--gov-green);flex:1}.flag-bar .y{background:var(--gov-yellow);flex:1}.flag-bar .b{background:var(--gov-blue);flex:1}
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:82px}
.brand{text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:14px;min-width:245px}
.brand-mark{display:grid;place-items:center;width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--gov-green),var(--gov-blue));color:#fff;font-weight:900;letter-spacing:.08em;box-shadow:var(--shadow)}
.brand-text strong{display:block;font-size:15px;letter-spacing:.05em;color:var(--gov-blue-3)}
.brand-text small{display:block;color:var(--muted);font-size:11px;letter-spacing:.08em}
.nav{display:flex;flex:1;min-width:0;gap:12px;flex-wrap:nowrap;white-space:nowrap;justify-content:center;overflow-x:auto}
.nav a{text-decoration:none;color:var(--gov-blue-3);font-weight:700;font-size:12px;padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a:focus-visible{border-bottom-color:var(--gov-green)}
.nav-download{white-space:nowrap;text-decoration:none;background:var(--gov-blue);color:#fff;padding:12px 16px;border-radius:999px;font-weight:700;font-size:13px;box-shadow:var(--shadow)}
.nav-download span{font-weight:900}
.hero{background:linear-gradient(180deg,#fff 0%, #f4f8ff 100%);padding:42px 0 34px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(340px,.95fr);gap:28px;align-items:start}
.eyebrow,.kicker{display:inline-flex;align-items:center;gap:8px;text-transform:uppercase;letter-spacing:.11em;font-size:12px;font-weight:800;color:var(--gov-green)}
.hero h1{font-size:clamp(2rem,4vw,3.45rem);line-height:1.08;letter-spacing:-.03em;color:var(--gov-blue-3);margin:12px 0 16px;max-width:780px}
.hero h1 span{display:block;color:var(--gov-blue);font-weight:700;font-size:.62em;line-height:1.2;margin-top:10px}
.lead{font-size:1.05rem;color:#25364b;max-width:760px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 18px;border-radius:999px;text-decoration:none;font-weight:800;border:2px solid transparent;min-height:48px}
.btn-primary{background:var(--gov-blue);color:#fff}.btn-primary:hover{background:#0c469d}
.btn-secondary{background:#fff;color:var(--gov-blue);border-color:var(--gov-blue)}.btn-secondary:hover{background:var(--gov-alt)}
.source-notice{display:flex;gap:12px;align-items:flex-start;padding:16px 18px;border-radius:16px;background:#fff;border:1px solid var(--line);margin-top:26px;max-width:760px}
.source-icon{display:grid;place-items:center;flex-shrink:0;width:28px;height:28px;border-radius:999px;background:var(--gov-blue);color:#fff;font-weight:900}
.hero-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}
.hero-panel-head{display:flex;justify-content:space-between;gap:10px;align-items:center;padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
.hero-panel-head strong{font-size:17px;color:var(--gov-blue-3)}
.status-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.status-card{background:var(--gov-alt);border:1px solid #d5e2f4;border-radius:16px;padding:16px;min-height:118px}
.status-label{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--gov-blue);font-weight:800;margin-bottom:8px}
.status-card strong{display:block;font-size:1.28rem;color:var(--gov-blue-3);line-height:1.15;margin-bottom:6px}
.status-card small{color:var(--muted)}
.oed-mini{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:18px;padding:18px;border-radius:16px;background:linear-gradient(90deg,#edf8ef,#eff4ff);border:1px solid var(--line)}
.oed-node{background:#fff;border:1px solid var(--line-strong);padding:12px 16px;border-radius:999px;font-weight:800;color:var(--gov-blue-3);text-align:center;flex:1}
.oed-node.emphasis{border-color:var(--gov-green);color:var(--gov-green)}
.oed-arrow{font-size:24px;font-weight:900;color:var(--gov-blue)}
.oed-caption{margin-top:12px;font-size:13px;color:var(--muted)}
.quickfacts{padding:26px 0}
.quickfacts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.fact-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}
.fact-kicker,.card-tag{display:inline-block;background:#edf8ef;color:var(--gov-green);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:6px 10px;border-radius:999px;margin-bottom:10px}
.fact-card h2{font-size:1.2rem;line-height:1.25;color:var(--gov-blue-3);margin:0 0 10px}
.fact-card p{margin:0;color:var(--muted)}
.metrics{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.metric{padding:24px 20px 24px 0;position:relative}
.metric:not(:last-child){margin-right:20px}
.metric:not(:last-child)::after{content:"";position:absolute;right:0;top:24px;bottom:24px;width:1px;background:var(--line)}
.metric-label{display:block;font-size:11px;font-weight:800;letter-spacing:.08em;color:var(--muted);margin-bottom:8px}
.metric strong{display:block;font-size:1.7rem;line-height:1.2;color:var(--gov-blue-3);margin-bottom:6px}
.metric small{color:var(--muted)}
.section{padding:64px 0;scroll-margin-top:98px}
.section-white{background:#fff}.section-alt{background:var(--gov-light)}
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:28px}
.section-heading h2,.bibliography h2{margin:8px 0 10px;font-size:clamp(1.8rem,3.5vw,2.6rem);line-height:1.1;letter-spacing:-.03em;color:var(--gov-blue-3)}
.section-heading h2 em,.bibliography h2 em{color:var(--gov-blue);font-style:normal}
.section-heading p,.bibliography p{margin:0;max-width:820px;color:var(--muted)}
.context-label{display:inline-block;padding:10px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:12px;font-weight:800;color:var(--gov-blue)}
.analysis-grid{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(310px,1fr);gap:20px;align-items:start}
.education-grid{grid-template-columns:minmax(0,1.65fr) minmax(310px,.95fr)}
.simulation-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(290px,.95fr);gap:20px}
.panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:var(--shadow)}
.panel-soft{background:#fbfdff}
.panel-primary{padding-bottom:18px}
.panel h3,.method-card h3,.research-notes h3{margin:0;font-size:1.05rem;color:var(--gov-blue-3)}
.panel-title-row{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;flex-wrap:wrap;margin-bottom:18px}
.panel-title-row p,.detail-sub{margin:4px 0 0;font-size:13px;color:var(--muted)}
.legend-toggles{display:flex;gap:8px;flex-wrap:wrap}
.series-btn{display:inline-flex;align-items:center;background:#fff;border:1px solid var(--line-strong);border-radius:999px;padding:8px 12px;font-size:12px;font-weight:800;color:var(--gov-blue-3)}
.series-btn:not(.active){opacity:.5}
.swatch{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px}
.s-total{background:var(--b)}.s-within{background:var(--bw)}.s-between{background:var(--bb)}.s-e0{background:var(--e0)}.s-e1{background:var(--e1)}.s-e2{background:var(--e2)}
.chart-wrap{position:relative}.chart-large{height:340px}.chart-medium{height:320px}.chart-sim{height:300px}
.chart-wrap svg{display:block;width:100%;height:100%;overflow:visible}
.chart-wrap svg text{font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
.axis-text,.x-label,.axis-title{fill:#5e7086;font-size:11px}
.grid-line{stroke:#dce4ef;stroke-width:1}
.chart-point{cursor:pointer;transition:r .12s ease}.chart-point:hover,.chart-point:focus-visible{stroke-width:4}
.panel-foot{margin:12px 0 0;padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.detail-panel{position:sticky;top:108px}
.detail-header{display:flex;justify-content:space-between;align-items:center;gap:10px}
.panel-overline{font-size:11px;font-weight:800;letter-spacing:.08em;color:var(--gov-green);text-transform:uppercase}
.detail-header select,.simulation-layout select{border:1px solid var(--line-strong);border-radius:12px;padding:9px 12px;background:#fff;color:var(--ink)}
.detail-period{font-size:2rem;color:var(--gov-blue-3);margin-top:18px;font-weight:800;letter-spacing:-.03em}
.coefficient{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:14px 0;border-top:1px solid var(--line)}
.coefficient div>span{display:block;color:var(--ink);font-size:14px}.coefficient div>small{display:block;color:var(--muted);font-size:12px}
.coefficient>strong{font-size:1.55rem;color:var(--gov-blue-3)}
.composition-key{display:flex;justify-content:space-between;gap:10px;margin-top:20px;font-size:11px;color:var(--muted);font-weight:800}
.share-bar{display:flex;height:12px;background:#dfe8f3;border-radius:999px;overflow:hidden;margin-top:8px}.share-bar>div:first-child{background:var(--bw)}.share-bar>div:last-child{background:var(--bb)}
.selected-note{margin-top:18px;padding:14px 16px;border-left:5px solid var(--gov-green);background:#edf8ef;color:#244236;border-radius:0 12px 12px 0;font-size:13px}
.sample-number{margin-top:10px;color:var(--muted);font-size:12px}
.simple-legend{display:flex;gap:16px;flex-wrap:wrap;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.research-notes .note-number{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:999px;background:var(--gov-blue);color:#fff;font-weight:900;margin-bottom:6px}
.research-notes p{color:var(--muted)}
.research-notes hr{border:none;border-top:1px solid var(--line);margin:24px 0}
.text-link{font-weight:800;text-decoration:none}
.simulation-explainer{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:var(--shadow)}
.sim-heading{display:flex;justify-content:space-between;gap:10px;color:var(--gov-blue);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding-bottom:12px;border-bottom:1px solid var(--line)}
.sim-item{display:grid;grid-template-columns:50px 1fr;gap:10px;padding:14px 0;border-top:1px solid var(--line)}
.sim-id{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--gov-alt);font-weight:900;color:var(--gov-blue)}
.sim-item strong{font-size:14px;color:var(--gov-blue-3)}
.sim-item p{margin:4px 0 0;color:var(--muted);font-size:13px}
.sim-warning{margin-top:16px;padding:14px 16px;background:#fff8dd;border:1px solid #f0dc89;border-radius:14px;color:#5c4900;font-size:13px}
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.cards-grid-3{grid-template-columns:repeat(3,1fr)}
.info-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}
.info-card h3{margin:2px 0 10px;font-size:1.1rem;color:var(--gov-blue-3)}
.info-card p,.info-card li{color:var(--muted)}
.info-card ul{margin:10px 0 0;padding-left:20px}
.info-card a{font-weight:800;text-decoration:none}
.multi-links{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.multi-links a{display:block;padding:10px 12px;border-radius:12px;background:var(--gov-alt);border:1px solid #d5e2f4}
.roadmap{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.roadmap-step{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow);display:flex;gap:14px}
.step-index{display:inline-grid;place-items:center;flex-shrink:0;width:42px;height:42px;border-radius:50%;font-weight:900;color:#fff;background:var(--line-strong)}
.roadmap-step.done .step-index{background:var(--success)}
.roadmap-step.active .step-index{background:var(--gov-blue)}
.roadmap-step.upcoming .step-index{background:var(--warn)}
.roadmap-step h3{margin:0 0 6px;color:var(--gov-blue-3);font-size:1.05rem}
.roadmap-step p{margin:0;color:var(--muted)}
.construction-note{margin-top:18px;background:#fff8dd;border:1px solid #f0dc89;border-radius:16px;padding:16px;color:#5c4900}
.table-panel{padding:0;overflow:hidden}
.table-toolbar{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap;padding:20px 24px;border-bottom:1px solid var(--line);background:#f8fbff}
.search-wrap{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line-strong);border-radius:999px;padding:10px 14px;min-width:280px}
.search-wrap input{border:0;outline:0;background:transparent;width:100%}
.table-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn-small{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:10px 14px;border-radius:999px;border:1px solid var(--line-strong);background:#fff;color:var(--gov-blue-3);font-weight:800;text-decoration:none}
.primary-small{background:var(--gov-blue);color:#fff;border-color:var(--gov-blue)}
.table-scroll{overflow:auto}
#results-table{width:100%;border-collapse:collapse;background:#fff}
#results-table thead th{position:sticky;top:0;background:#f8fbff;z-index:1;border-bottom:1px solid var(--line)}
#results-table th,#results-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14px;white-space:nowrap}
#results-table th button{background:none;border:0;padding:0;font-weight:800;color:var(--gov-blue-3);cursor:pointer}
#results-table tbody tr{cursor:pointer}
#results-table tbody tr:hover,#results-table tbody tr.selected{background:#eef5ff}
.table-bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:16px 24px;color:var(--muted);font-size:13px;background:#f8fbff}
.method-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(310px,.9fr);gap:20px;align-items:start}
.method-main{display:grid;gap:16px}
.method-card{display:grid;grid-template-columns:62px 1fr;gap:16px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow)}
.method-index{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,var(--gov-blue),var(--gov-green));color:#fff;font-weight:900;font-size:1.1rem}
.method-card p{margin:8px 0 0;color:var(--muted)}
.formula{display:inline-flex;align-items:center;gap:10px;margin-top:14px;background:#f8fbff;border:1px solid #d5e2f4;border-radius:14px;padding:12px 16px;font-weight:900;color:var(--gov-blue-3)}
.audit-box{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow);position:sticky;top:108px}
.audit-title{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:14px}
.audit-title span:first-child{text-transform:uppercase;font-weight:800;color:var(--gov-blue-3);letter-spacing:.06em;font-size:12px}
.audit-tag{background:#fff8dd;color:#5c4900;border:1px solid #f0dc89;padding:6px 10px;border-radius:999px;font-size:11px;font-weight:800}
.audit-row{display:flex;justify-content:space-between;gap:14px;padding:12px 0;border-top:1px solid var(--line);font-size:14px}
.audit-yes{color:var(--success)}.audit-warn{color:var(--warn)}
.audit-divider{height:1px;background:var(--line);margin:16px 0}
.audit-box h3{margin:0 0 8px;color:var(--gov-blue-3)}
.audit-box p{color:var(--muted)}
.audit-link{display:inline-block;margin-top:10px;font-weight:800;text-decoration:none}
.bibliography-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.2fr);gap:20px;align-items:start}
.reference-list{display:grid;gap:16px}
.reference{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow)}
.reference span{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--gov-green);font-weight:800;margin-bottom:8px}
.reference p{margin:0 0 10px;color:var(--muted)}
.reference a{display:inline-block;margin-right:12px;font-weight:800;text-decoration:none}
.footer{background:var(--gov-blue-3);color:#fff;padding:34px 0}
.footer-inner{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.footer-brand{font-size:1.05rem;font-weight:800;letter-spacing:.04em;margin-bottom:10px}
.footer p,.footer span,.footer small{color:#dbe5f3}
.footer-right{display:flex;flex-direction:column;align-items:flex-end;gap:10px;text-align:right}
.footer a{color:#fff;font-weight:800;text-decoration:none}
.chart-tooltip{position:fixed;left:0;top:0;transform:translate(-9999px,-9999px);padding:10px 12px;background:#072041;color:#fff;border-radius:12px;font-size:12px;line-height:1.45;box-shadow:var(--shadow);max-width:240px;z-index:999}
.chart-tooltip[hidden]{display:none !important}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.95em;background:#eef2f7;padding:.08em .35em;border-radius:6px}

@media (max-width: 1100px){
  .header-inner{flex-wrap:wrap;padding:12px 0}
  .nav{order:3;width:100%;justify-content:flex-start;overflow:auto;padding-bottom:4px}
  .hero-grid,.analysis-grid,.education-grid,.simulation-layout,.method-layout,.bibliography-grid{grid-template-columns:1fr}
  .detail-panel,.audit-box{position:static}
  .quickfacts-grid,.cards-grid,.cards-grid-3,.roadmap{grid-template-columns:1fr 1fr}
  .metrics-grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 760px){
  body{font-size:15px}
  .container{padding:0 16px}
  .topnote-inner{justify-content:flex-start}
  .brand{min-width:0}
  .nav-download{width:100%;text-align:center}
  .status-grid,.quickfacts-grid,.cards-grid,.cards-grid-3,.roadmap,.metrics-grid{grid-template-columns:1fr}
  .metric{padding-right:0;margin-right:0}
  .metric:not(:last-child)::after{display:none}
  .oed-mini{flex-direction:column}
  .oed-arrow{transform:rotate(90deg)}
  .table-toolbar,.table-bottom,.footer-inner{flex-direction:column;align-items:flex-start}
  .footer-right{text-align:left;align-items:flex-start}
  .search-wrap{min-width:100%}
  .multi-links{grid-template-columns:1fr}
}