:root{--ink:#13283c;--muted:#506477;--rule:#c7d3de;--blue:#1a5685;--paper:#f5f8fb;--orange:#9d5721;font:16px/1.65 Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0}a{color:var(--blue);text-underline-offset:.22em}a:hover{color:#07385e}button,input,select{font:inherit}a:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #b26628;outline-offset:4px}.skip{position:absolute;top:-100px;background:#fff;padding:12px;z-index:10}.skip:focus{top:0}.top{background:#102536;color:#fff;display:flex;justify-content:space-between;align-items:center;gap:24px;padding:20px max(24px,calc((100vw - 1240px)/2));min-height:88px}.brand{color:inherit;text-decoration:none;font-size:17px;font-weight:700;letter-spacing:.08em}.brand span{display:block;font-size:12px;letter-spacing:.28em;color:#bfcedc}.top nav{display:flex;gap:24px;flex-wrap:wrap}.top nav a{color:#d1deea;text-decoration:none;font-size:14px}.top nav a[aria-current]{color:white;border-bottom:2px solid #a5c8e3}.top a:hover{color:#fff}main{max-width:1288px;padding:0 24px;margin:auto}.crumb{display:flex;gap:10px;flex-wrap:wrap;margin:28px 0 38px;font-size:14px;color:var(--muted)}.crumb a{color:var(--muted)}h1,h2,h3{font-family:Georgia,'Times New Roman',serif;font-weight:400;line-height:1.14;letter-spacing:-.018em}h1{font-size:clamp(2.6rem,5vw,4.6rem);margin:15px 0 25px}h2{font-size:clamp(1.8rem,3vw,2.6rem);margin:0 0 24px}h3{font-size:1.4rem}p{margin:0 0 20px}.eyebrow,.section-label{font:600 12px/1.6 Arial,sans-serif;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.intro{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:64px;padding:0 0 56px;border-bottom:1px solid var(--rule)}.intro p:not(.eyebrow){max-width:830px;font-size:18px;line-height:1.7}.intro p:last-child{font-size:14px;color:var(--muted)}.intro-side{display:flex;flex-direction:column;gap:14px;align-items:stretch;padding-top:15px}.intro-side>a:not(.download){font-size:14px;text-align:center}.qmark{font:italic 150px/1 Georgia,serif;color:var(--ink);border:1px solid var(--rule);height:230px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(135deg,#e6edf4,#f9fbfd)}.qmark span{font:14px Arial,sans-serif;letter-spacing:.16em;margin-top:6px;color:var(--muted)}.download{display:flex;flex-direction:column;background:var(--ink);color:white;text-decoration:none;padding:20px;font-size:16px;line-height:1.5}.download:hover{color:white;background:#21425e}.download span{font-size:13px;opacity:.75;margin-top:10px}.labs{padding:42px 0;border-bottom:1px solid var(--rule)}.labs>p{max-width:900px}.section-label{margin-bottom:12px}.lab-grid{display:grid;grid-template-columns:260px minmax(0,1fr);gap:36px;margin-top:26px}.lab-controls{padding:22px;background:#e9eff5}.lab-controls label{display:block;font-size:14px;font-weight:600;margin-bottom:10px}.lab-controls output{float:right}.lab-controls input{width:100%;accent-color:var(--blue);margin:0 0 24px;min-height:24px}.lab-controls select{width:100%;padding:8px;border:1px solid #9fb3c5;background:white;margin-bottom:18px}.small{font-size:14px;line-height:1.55;color:var(--muted)}dl{margin:18px 0 0}dl div{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--rule);padding:5px 0}dt,dd{margin:0;font-size:16px}.plot{min-width:0;align-self:center}.plot svg{display:block;width:100%;height:auto;background:white;border:1px solid var(--rule)}.legend{display:flex;gap:25px;flex-wrap:wrap;margin:12px 0;font-size:14px}.legend span:before{content:'';display:inline-block;width:25px;height:3px;vertical-align:middle;margin-right:8px;background:var(--blue)}.legend .orange-key:before{background:var(--orange)}.calc-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.calc-controls label{font-size:14px;font-weight:600}.calc-controls input{display:block;width:100%;border:1px solid #a1b3c3;padding:12px;background:white;color:var(--ink);margin-top:6px;font-size:20px}#calc-results{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:26px 0;gap:1px;background:var(--rule);border:1px solid var(--rule)}#calc-results .stat{background:#edf3f8;padding:22px}#calc-results b{display:block;font:32px/1.3 Georgia,serif;margin-bottom:8px}#calc-results span{font-size:14px;color:var(--muted)}#calc-results .error{grid-column:1/-1;background:#fff0e4;padding:20px;margin:0}.reading{display:grid;grid-template-columns:250px minmax(0,1fr);gap:60px;padding:52px 0}.reading aside{align-self:start;position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto;padding-right:12px}.reading aside nav{display:flex;flex-direction:column;gap:9px}.reading aside nav a{font-size:14px;line-height:1.5;color:var(--muted);text-decoration:none}.reading aside nav a:hover{color:var(--blue);text-decoration:underline}.prose{min-width:0}.prose section{padding:0 0 40px;margin-bottom:42px;border-bottom:1px solid var(--rule)}.prose p,.prose li{font:18px/1.78 Georgia,'Times New Roman',serif}.prose li{margin-bottom:10px}.prose strong{font-weight:700}.prose section h2{font-size:32px}.formula{background:#e8f0f7;border-left:3px solid #5284ad;padding:18px 22px;font:16px/1.9 Arial,sans-serif;margin:25px 0;overflow-wrap:anywhere}.table-scroll{overflow-x:auto;margin:28px 0;border:1px solid var(--rule)}table{border-collapse:collapse;width:100%;text-align:left;font-size:15px;line-height:1.65}th{background:#e5edf4;font-weight:600}th,td{padding:14px 15px;vertical-align:top;border-bottom:1px solid var(--rule)}td+td,th+th{border-left:1px solid var(--rule)}tbody tr:last-child td{border-bottom:0}td:first-child{min-width:135px}.cite{font:12px Arial,sans-serif;white-space:nowrap;text-decoration:none}.sources{border-top:1px solid var(--rule);padding:45px 0 60px}.sources>p{max-width:920px;font-size:15px;color:var(--muted)}.sources ol{list-style:none;padding:0;margin:32px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:22px 44px}.sources li{display:flex;align-items:start;gap:15px;font-size:14px;line-height:1.65;overflow-wrap:anywhere}.sources li>span{flex:0 0 32px;color:var(--muted);font:13px/1.65 Arial,sans-serif}.sources a{color:var(--ink)}footer{display:flex;gap:30px;flex-wrap:wrap;justify-content:space-between;max-width:1288px;padding:25px 24px 40px;margin:auto;border-top:1px solid var(--rule);font-size:13px;color:var(--muted)}.index-intro{display:block;max-width:950px;border:0;padding-bottom:40px}.index-intro .lead{font-size:20px!important;color:var(--ink)!important}.book-card{display:grid;grid-template-columns:180px 1fr;gap:44px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:40px 0;margin-bottom:80px;max-width:1000px}.book-symbol{font:italic 140px/1.2 Georgia,serif;background:#e3edf5;display:flex;align-items:center;justify-content:center}.book-card h2 a{text-decoration:none;color:var(--ink)}.card-links{display:flex;gap:28px;flex-wrap:wrap}@media(max-width:1000px){.reading{grid-template-columns:190px minmax(0,1fr);gap:30px}.intro{gap:32px}.prose section h2{font-size:28px}}@media(max-width:760px){.top{padding:18px 20px;align-items:flex-start}.top nav{gap:12px}main{padding:0 20px}.crumb{font-size:13px;gap:8px;margin:22px 0 25px}.intro{grid-template-columns:1fr;gap:20px;padding-bottom:35px}.intro-side{display:grid;grid-template-columns:1fr;gap:12px;padding:0}.qmark{display:none}.download{flex-direction:row;justify-content:space-between;align-items:center}.download span{margin:0}.intro-side>a:not(.download){text-align:left}.intro p:not(.eyebrow){font-size:17px}.intro p:last-child{font-size:14px}.lab-grid{grid-template-columns:1fr;gap:18px}.lab-controls{padding:18px}.plot svg{min-height:190px}.reading{display:block;padding-top:30px}.reading aside{position:static;max-height:none;margin-bottom:40px;padding-bottom:28px;border-bottom:1px solid var(--rule)}.reading aside nav{display:grid;grid-template-columns:1fr 1fr;gap:12px 18px}.prose p,.prose li{font-size:18px}.prose section h2{font-size:29px}.sources ol{grid-template-columns:1fr}.calc-controls{gap:10px}.calc-controls input{font-size:18px;padding:10px}#calc-results .stat{padding:15px 10px}#calc-results b{font-size:23px}#calc-results span{font-size:13px}.table-scroll table{min-width:640px}.book-card{grid-template-columns:1fr;gap:20px}.book-symbol{display:none}.formula{padding:15px 14px;font-size:15px}footer{padding:22px 20px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.top,.crumb,.labs,.reading aside,.intro-side,footer,.skip{display:none}.reading{display:block}.intro{display:block}.sources ol{display:block}.sources li{margin-bottom:10px}.prose p,.prose li{font-size:11pt}.prose section h2{font-size:20pt}body{background:white}.table-scroll{overflow:visible}table{font-size:9pt}.prose section{break-before:page}.sources{break-before:page}}