:root{--ink:#16181d;--mut:#5b636c;--gold:#c9a23f;--link:#8a6a1c;--line:#dfe3e7;--paper:#f5f6f7}*{box-sizing:border-box;letter-spacing:0}body{margin:0;background:#fff;color:var(--ink);font:16px/1.6 Inter,-apple-system,Segoe UI,Arial,sans-serif}a{color:var(--link);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}.wrap{max-width:1140px;margin:auto;padding:0 26px}.site-head{border-bottom:1px solid var(--line)}.site-head .wrap,.site-foot .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;padding-top:18px;padding-bottom:18px}.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink);font-weight:600}.brand img{width:128px;height:auto}.brand span{border-left:1px solid var(--line);padding-left:14px;font-size:14px}nav{display:flex;gap:20px;flex-wrap:wrap;font-size:14px}nav a{color:var(--ink)}.breadcrumb{margin-top:24px;font-size:13px;color:var(--mut)}h1,h2,h3{line-height:1.2;font-weight:500;margin:0 0 16px}h1,h2{font-family:Fraunces,Georgia,serif}h1{font-size:42px;margin-top:18px}h2{font-size:29px}h3{font-size:18px;font-weight:650}.intro{max-width:720px;color:var(--mut);margin:0 0 28px}.tool{display:grid;grid-template-columns:minmax(260px,340px) minmax(0,1fr);border-top:3px solid var(--gold);border-bottom:1px solid var(--line);gap:32px;padding:24px 0 32px}.inputs{padding-right:28px;border-right:1px solid var(--line)}.units{display:flex;gap:0;align-items:center;margin-bottom:24px}.units button{width:62px;min-height:42px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;font:inherit}.units button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}label{display:block;margin:18px 0 6px;font-size:14px;font-weight:650}.input-wrap{position:relative}.input-wrap input{padding-right:48px}.input-wrap span{position:absolute;right:13px;top:10px;color:var(--mut)}input,select{font:inherit;width:100%;min-height:46px;border:1px solid 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16px}.chart{width:100%;height:300px;display:block}#chart-text{font-size:12px;color:var(--mut)}.legend{display:flex;gap:18px;flex-wrap:wrap;font-size:12px}.legend span::before{content:'';display:inline-block;width:22px;height:2px;background:var(--link);margin:0 6px 4px 0}.legend .surface::before{background:none;border-top:2px dashed #9c5140}.error{color:#9c332e;font-weight:600;min-height:24px;margin:12px 0}.band{padding:40px 0;border-bottom:1px solid var(--line)}.method-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:42px}.method-grid p{margin:0 0 16px}.formula{padding:16px 0;font-family:ui-monospace,monospace;font-size:14px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.example{background:var(--paper);padding:24px;align-self:start;border-left:3px solid var(--gold)}.example strong{font-size:24px}.example p{font-size:14px}.dataset-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:34px}.dataset-grid img{width:100%;height:auto;display:block}.download-list{display:flex;flex-wrap:wrap;gap:16px;margin:18px 0;font-size:14px}ul,ol{padding-left:22px}li{margin:8px 0}details{border-top:1px solid var(--line);padding:18px 0}summary{font-weight:600;cursor:pointer}details p{max-width:820px;color:var(--mut);font-size:14px}.sources{font-size:13px;overflow-wrap:anywhere}.site-foot{background:var(--paper);font-size:13px;color:var(--mut);margin-top:40px}#saved-link{font-size:12px;margin-top:8px}#save-status{font-size:12px;color:var(--mut);margin:0}[hidden]{display:none!important}@media(max-width:720px){.wrap{padding:0 18px}h1{font-size:33px}.site-head .wrap{align-items:flex-start;gap:12px}.brand span{display:none}.site-head nav{gap:8px 16px;justify-content:flex-end;font-size:12px}.tool{grid-template-columns:1fr;gap:24px}.inputs{border:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.inputs .full{grid-column:1/-1}.units{margin-bottom:0}.point{font-size:42px}.method-grid,.dataset-grid{grid-template-columns:1fr;gap:24px}.band{padding:30px 0}.site-foot .wrap{align-items:flex-start;flex-direction:column}h2{font-size:27px}.metrics{gap:12px}.metrics strong{font-size:21px}}@media(max-width:360px){.inputs{grid-template-columns:1fr}.inputs .full{grid-column:auto}.brand img{width:104px}.site-head nav{max-width:135px}.result-head{gap:8px}.point{font-size:38px}}@media print{.site-head nav,.actions,.units,#example,.download-list,.site-foot{display:none}.tool{display:block}.inputs{border:0;display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.inputs .full{grid-column:1/-1}.chart{max-width:600px}.band{break-inside:avoid}details:not([open]) p{display:block}.point{font-size:36px}a{color:var(--ink)}}
:root{color-scheme:light}
@media(min-width:361px) and (max-width:720px){.inputs>div:not(.full)>label{min-height:44px}}