*{box-sizing:border-box}html{scroll-behavior:auto}body{margin:0;color:#163c42;background:#fff;font:18px/1.65 Arial,Helvetica,sans-serif}a{color:#176b73;text-underline-offset:.22em}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible{outline:3px solid #a36522;outline-offset:4px}h1,h2,h3,strong{font-weight:500}h1,h2,h3{line-height:1.13;letter-spacing:-.035em}h1{font-size:clamp(2.5rem,4.8vw,4.4rem);max-width:17ch;margin:.4em 0}h2{font-size:2rem;margin:1.6em 0 .7em}h3{font-size:1.4rem}p{margin:0 0 1.3em}img{max-width:100%;height:auto;display:block}.site-header{position:fixed;inset:0 auto 0 0;width:228px;padding:42px 27px;border-right:1px solid #bdcfce;background:#f5f8f7;display:flex;flex-direction:column;z-index:2}.wordmark{display:flex;align-items:center;gap:12px;font-size:22px;line-height:1.13;text-decoration:none;color:#163c42;font-weight:500}.bracket{font-size:74px;line-height:1}.rail-label{font-size:10px;letter-spacing:.14em;line-height:1.65;margin:32px 0}.site-header nav{display:grid;gap:6px}.site-header nav a{padding:10px 0;font-size:15px;min-height:44px;text-decoration:none;border-bottom:1px solid #d7e3e1}.rail-note{font-size:13px;color:#486164;margin-top:auto;padding-top:30px}main,.site-footer{margin-left:228px}.wrap{max-width:1300px;margin-inline:auto;padding-inline:48px}.eyebrow{font-size:11px;letter-spacing:.16em;color:#176b73;margin-bottom:20px}.home-hero{display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:40px;min-height:620px;padding-block:70px}.home-hero h1{font-size:clamp(2.8rem,4.8vw,4.6rem);max-width:12ch}.lead{font-size:22px;line-height:1.55;max-width:56ch}.home-hero img{width:100%;border:1px solid #d5e1de}.text-link{display:inline-flex;align-items:center;min-height:44px;margin:6px 0}.section{padding-block:50px}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:24px;border-top:1px solid #163c42;padding-top:18px}.section-heading h2{margin:0 0 24px}.reading-row{display:grid;grid-template-columns:90px 1fr 2fr;gap:30px;padding:30px 0;border-bottom:1px solid #bdcfce;align-items:start}.reading-row h3{margin:0}.reading-row p{margin:0}.number{font-size:35px;color:#a36522}.feature{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;align-items:center}.feature h2{margin:0 0 20px}.history-band{background:#e8efed;margin-top:45px;padding:36px;display:grid;grid-template-columns:1fr 2fr;gap:32px}.history-band h2{margin:0}.history-band p:last-child{margin:0}.page-head{padding-block:64px 32px}.page-head h1{font-size:clamp(2.4rem,4.4vw,3.7rem);max-width:20ch}.prose{max-width:70ch}.page-copy{padding-bottom:70px;margin-left:0;max-width:80ch}.prose h2{font-size:1.8rem}.prose p,.prose li{max-width:70ch}.prose li{margin-bottom:.55em}.tool-content{max-width:1000px;padding-bottom:70px}.tool-content h2{font-size:1.8rem}.note{padding:28px 30px;background:#f5f8f7;border-left:3px solid #176b73;margin:30px 0;max-width:72ch}.note p:last-child{margin:0}.note h2,.note h3{margin-top:0}.definition{display:grid;grid-template-columns:180px 1fr;border-top:1px solid #bdcfce;padding:24px 0;gap:25px}.definition dt{font-weight:500}.definition dd{margin:0}.history-panel{display:grid;grid-template-columns:170px 1fr;gap:24px;border-top:2px solid #176b73;padding-top:28px}.history-date{font-size:35px;line-height:1.2}.article-head{padding-block:65px 45px;max-width:1000px}.article-head h1{font-size:clamp(2.4rem,4vw,3.8rem);max-width:22ch}.article-head img{width:100%;max-width:620px;margin-top:32px}.byline{font-size:14px}.scope{font-size:14px;max-width:75ch;border-left:2px solid #a36522;padding-left:15px}.article-grid{display:grid;grid-template-columns:145px minmax(0,1fr) 150px;gap:28px;align-items:start;padding-bottom:80px}.article-grid>*{min-width:0}.toc,.related{position:sticky;top:30px;font-size:13px;line-height:1.5}.toc a,.related a{display:block;padding:10px 0;min-height:44px}.related h2{font-size:22px;margin-top:0}.prose>h2:first-child{margin-top:0}.article-grid .prose{font-size:17px}.prose h2[id]{scroll-margin-top:24px}.site-footer{padding:36px 48px 25px;border-top:1px solid #bdcfce;display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:20px;font-size:14px}.site-footer nav{display:flex;flex-direction:column}.site-footer a{display:inline-flex;align-items:center;min-height:44px}.site-footer p:last-child{grid-column:1/-1}.small{font-size:13px}.skip{position:fixed;left:12px;top:-80px;background:#fff;color:#163c42;z-index:10;padding:12px}.skip:focus{top:12px}
@media(min-width:1600px){.article-grid{grid-template-columns:170px minmax(0,1fr) 170px;gap:40px}.article-grid .prose{font-size:18px}}
@media(max-width:1100px){.site-header{width:190px;padding:30px 20px}main,.site-footer{margin-left:190px}.wrap{padding-inline:32px}.article-grid{grid-template-columns:130px minmax(0,1fr)}.related{position:static;grid-column:2}.home-hero{gap:24px}.reading-row{grid-template-columns:50px 1fr 1.5fr;gap:20px}.feature{gap:24px}.wordmark{font-size:19px}}
@media(max-width:760px){.site-header{position:static;width:auto;padding:22px 20px;display:block;border-right:0;border-bottom:1px solid #bdcfce}.wordmark{font-size:20px}.bracket{font-size:55px}.rail-label{margin:12px 0;font-size:10px}.site-header nav{display:flex;flex-wrap:wrap;gap:0 20px}.site-header nav a{font-size:14px;padding:8px 0}.rail-note{display:none}main,.site-footer{margin-left:0}.wrap{padding-inline:20px}.home-hero{grid-template-columns:1fr;padding-block:38px;min-height:0;gap:28px}.home-hero h1{font-size:44px;max-width:13ch}.lead{font-size:20px}.section{padding-block:30px}.section-heading{display:block}.reading-row{grid-template-columns:35px 1fr;gap:16px}.reading-row p{grid-column:2}.number{font-size:25px}.feature{grid-template-columns:1fr}.history-band{grid-template-columns:1fr;gap:15px;padding:25px;margin-top:30px}.page-head{padding-block:38px 24px}.page-head h1{font-size:37px}.page-copy{padding-bottom:40px}.definition,.history-panel{grid-template-columns:1fr;gap:12px}.history-date{font-size:30px}.article-head{padding-block:38px 24px}.article-head h1{font-size:38px}.article-grid{display:block}.toc,.related{position:static}.toc{border-block:1px solid #bdcfce;padding:20px 0;margin-bottom:32px}.toc a{display:inline-block;margin-right:18px}.article-grid .prose{font-size:18px}.related{border-top:1px solid #bdcfce;padding-top:24px;margin-top:35px}.note{padding:20px}.site-footer{padding:25px 20px;grid-template-columns:1fr 1fr}.site-footer>p:first-child{grid-column:1/-1}.prose h2{font-size:27px}}