:root{--paper:#F5F7FA;--surface:#FFFFFF;--ink:#14223B;--muted:#4E5C72;--rule:#DCE4EE;--rule-strong:#A9BBD1;--pen:#1C5DB5;--pos:#0A7350;--neg:#B23A31;--neg2:#D07A2A;--neg3:#7A4FA8;--neu:#7C8BA1;--margin:#E59A9A;--focus:#1C5DB5;--serif:Charter,"Bitstream Charter","Sitka Text",Cambria,"Iowan Old Style",Georgia,serif;--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--radius:4px;color-scheme:light}@media 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a{display:flex;align-items:baseline;gap:0.5rem;text-decoration:none;color:var(--ink)}.toc-name{font:600 1.08rem/1.35 var(--serif)}.toc a:hover .toc-name{color:var(--pen);text-decoration:underline}.leader{flex:1;border-bottom:1px dotted var(--rule-strong);transform:translateY(-0.3em);min-width:1rem}.toc-tag{font-size:0.8rem;color:var(--muted);white-space:nowrap}.toc p{margin:0.2rem 0 0;font-size:0.92rem;color:var(--muted)}.method{margin:3rem 0 1rem}.crumbs ol{display:flex;flex-wrap:wrap;gap:0.25rem 0;list-style:none;margin:1.25rem 0 0;padding:0;font-size:0.85rem;color:var(--muted)}.crumbs li + li::before{content:"/";margin:0 0.5rem;color:var(--rule-strong)}.crumbs a{color:var(--muted)}.page-head{padding:1.25rem 0 1.5rem;max-width:48rem}.calc{display:grid;gap:1.5rem;align-items:start;grid-template-columns:minmax(0,1fr)}@media (min-width:60rem){.calc{grid-template-columns:minmax(0,1fr) 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solid var(--rule);padding-top:0.75rem}.ledger-more summary{cursor:pointer;color:var(--pen);font-weight:600;font-size:0.92rem}.scroll-x{overflow-x:auto;max-height:24rem;margin-top:0.75rem}.data{width:100%;border-collapse:collapse;font-size:0.85rem}.data th,.data td{padding:0.35rem 0.6rem;border-bottom:1px solid var(--rule);text-align:right;white-space:nowrap}.data th:first-child,.data td:first-child{text-align:left;padding-left:0}.data thead th{position:sticky;top:0;background:var(--surface);font-weight:600}.prose{max-width:44rem;margin-top:2.5rem}.prose h2:first-child{margin-top:0}.prose p,.prose li{line-height:1.7}.prose ul{padding-left:1.2rem}.faq details{border-bottom:1px solid var(--rule);padding:0.85rem 0}.faq details:first-of-type{border-top:1px solid var(--rule)}.faq summary{cursor:pointer;font:600 1.05rem/1.4 var(--serif);list-style-position:outside}.faq details p{margin:0.6rem 0 0;color:var(--muted)}.sources li{margin-bottom:0.3rem}.disclaimer{font-size:0.85rem;color:var(--muted);margin-top:1rem}.related{margin:3rem 0 1rem;max-width:44rem}.related h2{font-size:1.3rem;padding-bottom:0.4rem;border-bottom:2px solid var(--ink)}.ad{margin:2rem 0;min-height:280px;text-align:center}.ad-label{display:block;font-size:0.72rem;color:var(--muted);margin-bottom:0.25rem}.gate{text-align:left}.gate-links{display:flex;flex-wrap:wrap;gap:0.75rem;list-style:none;padding:0;margin:1.5rem 0 0}.site-foot{margin-top:4rem;border-top:1px solid var(--rule);background:var(--surface);padding:2rem 0 2.5rem;font-size:0.88rem;color:var(--muted)}.foot-brand{display:flex;align-items:center;gap:0.5rem;font:700 1.05rem/1 var(--serif);color:var(--ink)}.foot-brand .mark{width:1.4rem;height:1.4rem}.foot-note{max-width:40rem}.foot-links{display:flex;flex-wrap:wrap;gap:0.5rem 1.25rem;list-style:none;margin:0 0 1rem;padding:0}.foot-links a{color:var(--muted)}.foot-copy{margin:0}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto !important;transition:none !important;animation:none !important}}@media print{.site-head,.site-foot,.calc-form,.ad,.related,.crumbs{display:none}.calc{display:block}.ledger{border:0;padding-left:0}.ledger::before{display:none}}