:root{
  --ink:#17191d;--muted:#5f646b;--soft:#f4f5f6;--paper:#fff;--line:#d9dde2;
  --gold:#c5a03d;--gold-dark:#806418;--gold-pale:#f7f2df;--charcoal:#25282d;
  --blue:#2e628a;--red:#a94638;--shadow:0 16px 42px rgba(24,28,34,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:#fff}
body{margin:0;color:var(--ink);background:#fff;font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.55;font-variant-numeric:tabular-nums}
a{color:var(--gold-dark);text-decoration-thickness:1px;text-underline-offset:3px}
button,input,select{font:inherit}
img{max-width:100%;height:auto}
.wrap{width:min(1160px,calc(100% - 40px));margin-inline:auto}
.site-head{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.site-head .wrap{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:750}
.brand img{width:135px;height:auto;display:block}.brand span{padding-left:12px;border-left:1px solid var(--line)}
.site-head nav{display:flex;gap:20px;font-size:14px;font-weight:700}.site-head nav a{color:var(--muted);text-decoration:none}
.intro{padding:46px 0 26px;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:54px;align-items:end}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:20px}.crumbs a{color:inherit}
.eyebrow{margin:0 0 10px;text-transform:uppercase;letter-spacing:.11em;font-size:12px;font-weight:800;color:var(--gold-dark)}
h1,h2,h3{font-family:Fraunces,Georgia,serif;letter-spacing:0}
h1{font-size:clamp(40px,6vw,70px);line-height:.98;margin:0 0 18px;font-weight:600;max-width:820px}
.lede{font-size:18px;line-height:1.55;color:var(--muted);max-width:790px;margin:0}
.demand-note{border-left:3px solid var(--gold);padding:4px 0 4px 18px;color:var(--muted);font-size:14px}.demand-note b{color:var(--ink);display:block;font-size:16px;margin-bottom:4px}
.workspace{background:var(--soft);border-block:1px solid var(--line);padding:30px 0 38px}
.workgrid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(340px,.75fr);gap:22px;align-items:start}.workgrid>*{min-width:0}
.panel{background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);padding:24px;min-width:0}
.panel.sticky{position:sticky;top:88px}
.panel-head{display:flex;justify-content:space-between;gap:16px;align-items:start;margin-bottom:18px}.panel-head h2{font-size:25px;margin:0}.panel-head p{margin:5px 0 0;color:var(--muted);font-size:14px}
.icon-btn{border:1px solid var(--line);background:#fff;width:40px;height:40px;padding:10px;border-radius:6px;cursor:pointer;display:grid;place-items:center}.icon-btn img{width:18px;height:18px}
.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 16px}.field-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
label{display:block;font-size:12px;font-weight:800;color:var(--muted)}
input,select{display:block;width:100%;min-height:44px;margin-top:6px;border:1px solid #cbd1d8;border-radius:6px;background:#fff;color:var(--ink);padding:9px 11px;font-size:16px}
input:focus,select:focus{outline:3px solid rgba(197,160,61,.22);border-color:var(--gold-dark)}
.fieldset{border:0;border-top:1px solid var(--line);padding:20px 0 0;margin:22px 0 0}.fieldset legend{padding:0 12px 0 0;font-weight:850;font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.layer-row{display:grid;grid-template-columns:minmax(160px,1fr) 120px 110px;gap:12px;align-items:end;padding:14px 0;border-bottom:1px solid #e7e9ec}.layer-row:last-child{border-bottom:0}.layer-name{display:flex;gap:9px;align-items:end}.layer-name input[type=checkbox]{width:20px;min-height:20px;height:20px;margin:0 0 12px;accent-color:var(--gold-dark)}
.mode-row{display:flex;gap:6px;padding:4px;border:1px solid var(--line);background:var(--soft);border-radius:7px;width:max-content;max-width:100%;margin-bottom:15px}.mode-row label{position:relative;min-width:0}.mode-row input{position:absolute;opacity:0;width:1px;height:1px;min-height:1px;margin:0;padding:0;overflow:hidden}.mode-row span{display:block;padding:8px 12px;border-radius:5px;cursor:pointer;font-size:13px;line-height:1.25;color:var(--muted);overflow-wrap:anywhere}.mode-row input:checked+span{background:#fff;color:var(--ink);box-shadow:0 1px 5px rgba(30,25,14,.08)}
.actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}.btn{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:6px;padding:10px 14px;min-height:42px;display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:14px;cursor:pointer;text-decoration:none}.btn img{width:17px;height:17px}.btn.primary{background:var(--charcoal);border-color:var(--charcoal);color:#fff}.btn.gold{background:var(--gold);border-color:var(--gold);color:#17140b}.btn:hover{transform:translateY(-1px)}
.error{min-height:24px;color:var(--red);font-size:13px;font-weight:700;margin:12px 0 0}.notice{min-height:22px;color:var(--gold-dark);font-size:13px;margin:8px 0 0}
.result-total{padding:20px 0;border-block:1px solid var(--line);margin-bottom:17px}.result-total .label{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:800}.result-total output{font-family:Fraunces,Georgia,serif;font-size:52px;line-height:1.05;display:block;margin:6px 0}.result-total small{color:var(--muted)}
.metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:7px;overflow:hidden}.metric{background:#fff;padding:13px}.metric span{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:800}.metric output{font-size:20px;font-weight:850;margin-top:4px;display:block}
.bars{margin:22px 0 8px}.bar-row{display:grid;grid-template-columns:132px minmax(0,1fr) 78px;gap:10px;align-items:center;margin:10px 0;font-size:12px}.bar-track{height:13px;background:var(--soft);border-radius:2px;overflow:hidden}.bar-fill{height:100%;background:var(--gold);min-width:2px}.bar-row:nth-child(2n) .bar-fill{background:var(--charcoal)}.bar-value{text-align:right;font-weight:800}
.scope{font-size:12.5px;color:var(--muted);background:var(--soft);padding:13px;border-radius:6px;margin-top:18px}
.comparison{padding:54px 0}.section-head{display:flex;justify-content:space-between;gap:22px;align-items:end;margin-bottom:22px}.section-head h2{font-size:34px;margin:0}.section-head p{color:var(--muted);margin:0;max-width:580px}
.table-scroll{overflow:auto;max-width:100%;min-width:0;border:1px solid var(--line);border-radius:7px}table{width:100%;border-collapse:collapse;background:#fff;font-size:14px}th,td{padding:12px 13px;text-align:right;border-bottom:1px solid #e7e9ec;white-space:nowrap}th:first-child,td:first-child{text-align:left}thead th{font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);background:var(--soft)}tbody tr:last-child td{border-bottom:0}.empty{text-align:center!important;color:var(--muted);padding:28px!important}
.content-band{padding:64px 0;border-top:1px solid var(--line)}.content-band.alt{background:var(--soft)}
.content-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.72fr);gap:46px;align-items:start}.content-grid>*{min-width:0}.content-grid h2{font-size:38px;line-height:1.08;margin:0 0 18px}.content-grid h3{font-size:22px;margin:26px 0 8px}.content-grid p{color:#454a51}.formula{padding:16px 18px;background:#25282d;color:#fff;border-radius:7px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;line-height:1.75;overflow:auto}
.evidence-figure{margin:0}.evidence-figure img{display:block;border:1px solid var(--line);border-radius:7px;background:#fff}.evidence-figure figcaption{font-size:12px;color:var(--muted);margin-top:10px}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:20px}.download-grid a{border:1px solid var(--line);background:#fff;padding:14px;border-radius:6px;text-decoration:none;font-weight:800}.download-grid small{display:block;color:var(--muted);font-weight:500;margin-top:4px}
.step-list{counter-reset:steps;display:grid;gap:12px}.step{counter-increment:steps;display:grid;grid-template-columns:38px 1fr;gap:12px;align-items:start}.step:before{content:counter(steps);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--gold);font-weight:900}.step h3{font-family:Inter,system-ui,sans-serif;font-size:15px;margin:2px 0 3px}.step p{font-size:14px;margin:0;color:var(--muted)}
.source-list{padding-left:20px}.source-list li{margin:9px 0;color:var(--muted)}
.faq details{border-top:1px solid var(--line)}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;padding:18px 0;font-weight:850}.faq details p{color:var(--muted);max-width:850px;margin:0 0 20px}
.related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.related a{border:1px solid var(--line);background:#fff;border-radius:7px;padding:18px;text-decoration:none;font-weight:850}.related span{display:block;color:var(--muted);font-weight:500;font-size:13px;margin-top:5px}
.site-foot{border-top:1px solid var(--line);padding:34px 0 54px;color:var(--muted);font-size:13px}.site-foot .wrap{display:flex;justify-content:space-between;gap:24px}.site-foot nav{display:flex;gap:16px;flex-wrap:wrap}
@media(max-width:900px){.intro,.workgrid,.content-grid{grid-template-columns:minmax(0,1fr)}.panel.sticky{position:static}.intro{gap:24px}.demand-note{max-width:620px}.related,.download-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.wrap{width:min(100% - 28px,1160px)}.site-head .wrap{min-height:58px}.brand span,.site-head nav{display:none}.intro{padding-top:30px}h1{font-size:42px}.lede{font-size:16px}.workspace{padding-top:18px}.panel{padding:17px;border-radius:7px}.field-grid,.field-grid.three{grid-template-columns:1fr}.layer-row{grid-template-columns:1fr 1fr}.layer-name{grid-column:1/-1}.metrics{grid-template-columns:1fr 1fr}.result-total output{font-size:44px}.bar-row{grid-template-columns:102px minmax(0,1fr) 68px}.section-head{display:block}.section-head h2,.content-grid h2{font-size:30px}.download-grid,.related{grid-template-columns:1fr}.site-foot .wrap{display:block}.site-foot nav{margin-top:18px}}
@media(max-width:390px){.metrics{grid-template-columns:1fr}.mode-row{width:100%}.mode-row label{flex:1}.mode-row span{text-align:center;padding-inline:6px}.actions .btn{flex:1;justify-content:center}}
@media print{.site-head,.actions,.demand-note,.related{display:none!important}.workspace{background:#fff}.panel{box-shadow:none}.panel.sticky{position:static}.workgrid{grid-template-columns:1fr 1fr}}