:root{--ink:#192b30;--muted:#52646a;--line:#d6e0e2;--green:#086855;--blue:#176caf;--layer-0:#1977a1;--layer-1:#b17420;--layer-2:#188473;--layer-3:#8f5c92}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font:16px/1.55 Arial,sans-serif;letter-spacing:0}a{color:#076654;text-underline-offset:3px}a:hover{color:#164f9c}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer;min-height:40px;border:1px solid var(--line);border-radius:5px;padding:8px 12px;background:white;color:var(--ink);display:inline-flex;gap:7px;align-items:center;justify-content:center}button:hover{background:#edf5f3}button:disabled{opacity:.45;cursor:default}button img{display:block;flex:none}input,select{border:1px solid #a9bcc1;border-radius:4px;background:white;color:var(--ink);padding:9px;width:100%;min-height:42px;min-width:0}input:focus,select:focus,button:focus-visible,a:focus-visible{outline:3px solid #eeb943;outline-offset:2px}label{display:block;font-size:13px;font-weight:600;min-width:0}label input,label select{display:block;margin-top:5px}h1,h2,h3,p{margin:0 0 14px}h1{font-size:36px;line-height:1.18;max-width:700px}h2{font-size:23px;line-height:1.3}h3{font-size:18px}.wrap{max-width:1200px;margin:auto;padding:0 28px}.site-head{border-bottom:1px solid var(--line);background:white}.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:74px}.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink);font-weight:bold}.brand img{width:135px;height:37px;object-fit:contain}.brand span{font-size:14px;border-left:1px solid var(--line);padding-left:14px}.site-head nav{display:flex;gap:22px;font-size:14px}main{padding-bottom:50px}.intro{padding-top:24px;padding-bottom:22px}.crumbs{font-size:13px;margin-bottom:17px}.eyebrow{font-size:12px;color:var(--green);font-weight:700;text-transform:uppercase;letter-spacing:0}.intro .lede{max-width:730px;font-size:17px;color:var(--muted);margin:0}.workspace{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#f4f7f8}.workspace>.wrap{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr);gap:36px;padding-top:28px;padding-bottom:32px}.editor,.result{min-width:0}.editor-top{display:flex;gap:12px;align-items:end;margin-bottom:15px}.editor-top label{flex:1}.editor-top button{flex:none}.project-name{margin:0 0 16px}.layer{padding:14px;margin:0 0 14px;border:1px solid var(--line);border-radius:6px;background:white;min-width:0}.layer legend{font-size:12px;font-weight:700;color:var(--green);padding:0 6px}.layer-top{display:flex;gap:10px;align-items:end;margin-bottom:12px}.layer-name{flex:1}.row-actions{display:flex;gap:3px;padding-bottom:1px}.row-actions button{width:34px;min-height:38px;padding:6px}.layer-fields{display:grid;grid-template-columns:minmax(150px,1.5fr) minmax(90px,1fr) minmax(80px,1fr);gap:12px}.property{font-size:13px;padding-top:1px}.property strong{display:block;padding-top:11px;font-size:16px}.source-line{font-size:12px;margin:10px 0;color:var(--muted)}.check{display:flex;align-items:center;gap:8px;font-weight:400;margin:12px 0 0;font-size:13px}.check input{width:17px;height:17px;min-height:17px;margin:0;accent-color:var(--green)}.bridge-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}.editor-bottom{display:flex;justify-content:space-between;gap:12px}.boundary{border:0;border-top:1px solid var(--line);margin:22px 0 0;padding:18px 0 0}.boundary summary{cursor:pointer;font-size:15px;font-weight:bold}.boundary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:15px}.result{align-self:start;position:sticky;top:18px}.result-head{display:flex;justify-content:space-between;align-items:start;margin-bottom:20px}.result-head h2{margin:0;font-size:20px}.result-head .tools{display:flex;gap:4px}.tools button{width:39px;padding:8px}.metric{display:flex;align-items:baseline;gap:12px;border-bottom:2px solid var(--ink);padding-bottom:17px;margin-bottom:16px}.metric output{font-size:58px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.2}.metric span{font-size:16px}.secondary-metric{font-size:17px;font-weight:700;margin-bottom:8px}.small{font-size:13px;color:var(--muted)}#error{color:#a52820;font-weight:600;font-size:14px;min-height:22px}#bridge-impact{color:#925915;font-size:13px}#bounds,#correction-note{font-size:12px;color:var(--muted)}.r-row{display:grid;grid-template-columns:1fr 60px;gap:4px 10px;margin:14px 0;font-size:13px}.r-row strong{text-align:right}.r-track{grid-column:1/-1;background:#dce6e8;height:7px;border-radius:2px;overflow:hidden}.r-track>div{height:100%}.r-row span{overflow-wrap:anywhere}.chart-label{font-size:12px;color:var(--muted);margin-top:24px}.scope-note{font-size:13px;border-left:3px solid #c98a23;padding-left:13px;margin-top:22px}.action-primary{background:var(--green);border-color:var(--green);color:white}.action-primary:hover{background:#074f42}.action-row{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}.section{padding-top:38px;padding-bottom:30px;border-bottom:1px solid var(--line)}.section-heading{display:flex;justify-content:space-between;gap:15px;align-items:start}.download-links{display:flex;gap:18px;flex-wrap:wrap;font-size:14px}.table-scroll{overflow:auto;max-width:100%;margin-top:15px}table{border-collapse:collapse;width:100%;font-size:13px}th,td{padding:11px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}thead th{background:#eef3f4;font-size:12px;white-space:nowrap}tbody th{font-weight:500}td button{margin-right:5px}.evidence-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}.evidence-grid img{width:100%;height:auto;display:block;max-width:660px}.material-notes p{font-size:14px}.source-list{font-size:13px;display:grid;grid-template-columns:1fr 1fr;gap:10px 30px;padding-left:20px}.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px}.formula{font:16px/1.7 monospace;background:#f1f6f5;padding:16px;border-left:3px solid var(--green);margin:14px 0}.method-grid p{font-size:14px}.faq details{border-bottom:1px solid var(--line);padding:16px 0}.faq summary{font-weight:bold;cursor:pointer}.faq details p{max-width:850px;font-size:14px;margin:12px 0 0}.site-foot{border-top:1px solid var(--line);background:#eef3f4;padding:28px 0;color:var(--muted);font-size:13px}.site-foot .wrap{display:flex;justify-content:space-between;gap:30px}.site-foot nav{display:flex;flex-wrap:wrap;gap:16px}#notice{min-height:23px;color:var(--green);font-size:13px}.muted{color:var(--muted)}@media(max-width:820px){.workspace>.wrap{grid-template-columns:1fr;gap:30px}.result{position:static}.evidence-grid,.method-grid{grid-template-columns:1fr}.site-head nav{gap:12px}.brand span{display:none}.metric output{font-size:48px}}@media(max-width:480px){.wrap{padding-left:16px;padding-right:16px}.site-head .wrap{min-height:64px;gap:10px}.brand img{width:112px;height:32px}.site-head nav{font-size:12px;gap:10px}.site-head nav a:last-child{display:none}h1{font-size:28px}.intro .lede{font-size:15px}.layer{padding:10px}.layer-top{display:block}.row-actions{margin-top:9px;justify-content:flex-end}.layer-fields{grid-template-columns:1fr 1fr}.layer-fields .material{grid-column:1/-1}.source-line{overflow-wrap:anywhere}.editor-top{flex-wrap:wrap}.section-heading{display:block}.source-list{grid-template-columns:1fr}.site-foot .wrap{display:block}.section{padding-top:28px}.metric output{font-size:46px}}@media print{.site-head,button,.tools,.action-row,.editor-top,.editor-bottom,.row-actions,.site-foot,.download-links{display:none!important}.workspace{background:white}.workspace>.wrap{display:block}.result{position:static}.wrap{max-width:none;padding:0}.layer{break-inside:avoid}.section{padding-top:20px}.metric output{font-size:36px}.table-scroll{overflow:visible}}