:root{--navy:#102e49;--navy-dark:#0c2235;--teal:#087a71;--mint:#3bc5b5;--ink:#233746;--muted:#587080;--line:#dbe5e9;--pale:#f1f6f6;--white:#fff;--radius:8px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:105px}
body{margin:0;color:var(--ink);background:var(--white);font:17px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--teal);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px;color:var(--navy)}
a:focus-visible,summary:focus-visible{outline:3px solid #cf8419;outline-offset:5px;border-radius:2px}
img{max-width:100%;height:auto;display:block}
.container{width:min(1280px,calc(100% - 80px));margin-inline:auto}
.skip-link{position:absolute;z-index:100;left:20px;top:-100px;padding:10px 20px;background:white}
.skip-link:focus{top:15px}
.topline{color:#e5f0f4;background:var(--navy);font-size:12px;letter-spacing:.035em}
.topline .container{display:flex;justify-content:space-between;gap:15px;padding-block:8px}
.topline a{color:#e5f0f4;text-decoration:none}
.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:rgba(255,255,255,.98)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:91px;gap:32px}
.brand{display:block;flex:none;width:289px;padding-block:12px}
.brand img{width:100%;height:auto}
.header-nav{display:flex;gap:29px;align-items:center;font-size:14px;font-weight:600}
.header-nav a{color:var(--navy);text-decoration:none;padding-block:20px}
.header-nav a:hover{color:var(--teal)}
.hero{background:var(--pale);border-bottom:1px solid var(--line);padding:61px 0 66px}
.hero-grid{display:grid;grid-template-columns:1.08fr 1fr;gap:60px;align-items:center}
.eyebrow{display:flex;align-items:center;gap:12px;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--teal)}
.eyebrow-line{width:25px;height:2px;background:var(--teal)}
h1,h2{font-family:Georgia,"Times New Roman",serif;color:var(--navy);font-weight:400;letter-spacing:-.028em;line-height:1.2}
h1{font-size:clamp(38px,3.8vw,54px);margin:19px 0 20px}
h2{font-size:34px;margin:0 0 24px}
h3{font-size:23px;line-height:1.36;letter-spacing:-.018em;color:var(--navy);margin:0 0 19px}
h5{font-size:18px;line-height:1.4;color:var(--navy);margin:0 0 16px}
.byline{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:12px;line-height:1.5;margin-bottom:25px}
.byline a{color:var(--ink);font-weight:600;text-decoration:none}
.hero-copy p{font-size:15px;line-height:1.7;margin:0 0 16px}
.hero-copy .lead{font-size:17px}
.notice{padding:20px 23px;background:#eff7f6;border-left:3px solid var(--teal);border-radius:0 var(--radius) var(--radius) 0;margin:25px 0;font-size:15px;line-height:1.7}
.notice strong{color:var(--navy)}
.hero .notice{background:#e2edec;margin:21px 0 23px;font-size:13px;padding:16px 19px}
.primary-link{display:inline-flex;align-items:center;gap:37px;background:var(--navy);color:white;text-decoration:none;font-size:14px;font-weight:600;padding:13px 22px;border-radius:4px;transition:background .15s}
.primary-link:hover{color:white;background:#195070}
.hero-figure{margin:0;align-self:center}
.hero-figure img{aspect-ratio:1.15;object-fit:cover;border-radius:var(--radius);width:100%}
figure{margin:36px 0 12px}
figure img{border-radius:var(--radius);width:100%}
figcaption{font-size:13px;color:var(--muted);line-height:1.6;margin-top:12px}
.hero-figure figcaption{display:flex;gap:14px;font-size:12px}
.image-index{font-size:10px;letter-spacing:.05em;color:var(--teal);font-weight:700;white-space:nowrap;padding-top:2px}
.overview-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-bottom:1px solid var(--line);padding-block:31px;gap:0}
.overview-strip>a{position:relative;padding:3px 24px;text-decoration:none;color:var(--ink);border-right:1px solid var(--line);transition:background .15s}
.overview-strip>a:first-child{padding-left:0}
.overview-strip>a:last-child{border-right:0}
.overview-strip>a:hover{background:var(--pale)}
.overview-strip strong{display:block;color:var(--navy);font-size:20px;line-height:1.45;margin:5px 0}
.overview-strip>a>span:not(.card-label):not(.card-arrow){font-size:12px;display:block;line-height:1.5}
.card-label{font-size:10px;letter-spacing:.045em;text-transform:uppercase;font-weight:700;color:var(--teal)}
.card-label.caution{color:#946118}
.card-arrow{position:absolute;right:18px;top:35px;color:var(--teal)}
.content-grid{display:grid;grid-template-columns:218px minmax(0,866px);gap:74px;justify-content:space-between;padding-top:63px;padding-bottom:75px}
.sidebar{min-width:0}
.sidebar-sticky{position:sticky;top:127px}
.sidebar-label{font-weight:700;text-transform:uppercase;letter-spacing:.1em;font-size:11px;color:var(--muted);padding:0 0 17px 14px;border-bottom:1px solid var(--line)}
.toc{display:flex;flex-direction:column;padding:13px 0 16px}
.toc a{font-size:13px;color:var(--muted);text-decoration:none;padding:8px 14px;border-left:2px solid transparent;line-height:1.5}
.toc a:hover,.toc a[aria-current="location"]{color:var(--teal);border-color:var(--teal);background:#f1f7f6}
.sidebar-help{margin-top:26px;padding:24px 15px;background:var(--pale);border-radius:var(--radius)}
.age-mark{display:inline-flex;align-items:center;justify-content:center;border:1px solid #9bb4be;border-radius:50%;width:38px;height:38px;font-size:13px;font-weight:700;color:var(--navy)}
.sidebar-help p{font-family:Georgia,serif;font-size:18px;line-height:1.5;margin:14px 0}
.sidebar-help a{font-size:11px;font-weight:600}
.mobile-toc{display:none}
.article-body{min-width:0}
.article-section{margin-bottom:40px;overflow-wrap:break-word}
.article-section.level-2{margin-top:65px;padding-top:38px;border-top:1px solid var(--line)}
.article-section.level-2:first-of-type{border-top:0;padding-top:0;margin-top:0}
.article-section p{margin:0 0 19px}
.article-section ul,.article-section ol{margin:20px 0 27px;padding-left:24px}
.article-section li{padding-left:4px;margin-bottom:10px}
.article-section li::marker{color:var(--teal)}
.article-section .lead{font-size:20px}
.table-scroll{max-width:100%;overflow-x:auto;margin:28px 0;overscroll-behavior-x:contain;border:1px solid var(--line);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;text-align:left;font-size:14px;line-height:1.6}
caption{caption-side:top;text-align:left;padding:16px 20px;font-weight:600;background:var(--pale);color:var(--navy);border-bottom:1px solid var(--line);font-size:12px}
th{background:#eaf1f4;color:var(--navy);font-size:12px;font-weight:700;vertical-align:top}
th,td{padding:16px 17px;border-bottom:1px solid var(--line);vertical-align:top}
th:first-child{min-width:135px}
tr:last-child td{border-bottom:0}
tbody tr:nth-child(even){background:#f7f9fa}
td a{font-weight:600}
.source-note{font-size:12px;line-height:1.8;color:var(--muted)}
.citation{font-size:10px;line-height:0;padding-left:3px;white-space:nowrap}
.citation a{text-decoration:none;font-weight:700}
.profile{margin:29px 0 20px;border:1px solid #b8cfce;padding:25px 27px;border-radius:var(--radius);background:#f5f9f8}
.profile>strong{font-size:19px;line-height:1.4;color:var(--navy);display:block;margin-bottom:16px}
.profile p:last-child{margin:0}
.calculation{background:var(--navy);color:#edf5f8;padding:25px 30px;border-radius:var(--radius);margin:29px 0}
.calculation strong{display:block;color:#9de2d7;line-height:1.5;font-size:17px;margin-bottom:13px}
.calculation p:last-child{margin:0}
.calculation em{color:white}
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:0}
summary{cursor:pointer;font-weight:600;color:var(--navy);line-height:1.5}
.faq summary{padding:21px 32px 21px 0;list-style:none;position:relative;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';position:absolute;right:4px;top:17px;font-size:24px;font-weight:400;color:var(--teal)}
.faq details[open] summary::after{content:'−'}
.faq details p{font-size:15px;line-height:1.75;margin:0 28px 23px 0}
.sources{border:1px solid var(--line);border-radius:var(--radius);padding:20px 23px;margin-top:29px;background:var(--pale)}
.sources summary{font-size:15px}
.sources>p{font-size:13px;margin-top:20px}
.sources ol{font-size:13px;line-height:1.55}
.sources li{padding:6px 4px}
.sources li:target{background:#dcebe6;border-radius:4px}
.author-box{display:flex;align-items:center;gap:23px;padding:29px;background:var(--pale);border-radius:var(--radius);margin:39px 0 0}
.author-box img{width:84px;height:84px;object-fit:cover;border-radius:50%;flex:none}
.author-info strong,.author-box strong{display:block;color:var(--navy);font-size:19px}
.author-info span,.author-box span{display:block;font-size:13px;color:var(--muted)}
.article-section.level-5{padding:26px 0 0;border-top:1px solid var(--line);font-size:15px}
.site-footer{background:var(--navy-dark);color:#c6d5de;padding:53px 0 0;font-size:14px}
.site-footer h2,.site-footer h5{color:#fff}
.site-footer h2{font-size:29px}
.site-footer .article-section{margin-top:0;padding-top:0;border:0;margin-bottom:29px}
.site-footer .article-section p{font-size:13px;line-height:1.8}
.site-footer h5{font-size:15px}
.site-footer a{color:#b4d3d8;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:28px;padding:13px 0 35px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{padding:0;margin:0 0 10px;font-size:12px;line-height:1.5}
.footer-bottom-grid{border-top:1px solid #2f4354;display:grid;grid-template-columns:1fr 1.4fr;gap:85px;padding:39px 0 16px}
.footer-bottom-grid h2{font-family:inherit;font-size:18px;letter-spacing:0;font-weight:600;line-height:1.45}
.footer-base{display:flex;justify-content:space-between;gap:25px;border-top:1px solid #2f4354;padding:23px 0;font-size:11px;line-height:1.6}
@media(min-width:1500px){.hero{padding-block:70px}.hero-grid{gap:75px}}
@media(max-width:1100px){.container{width:calc(100% - 56px)}.hero-grid{gap:36px}.content-grid{grid-template-columns:180px minmax(0,1fr);gap:40px}.header-nav{gap:19px;font-size:13px}.brand{width:260px}.hero-copy p{font-size:14px}.hero-copy .lead{font-size:16px}.overview-strip>a{padding-inline:18px}.card-arrow{right:10px}.overview-strip strong{font-size:18px}.sidebar-help{padding-inline:12px}.sidebar-help a{font-size:10px}}
@media(max-width:820px){html{scroll-padding-top:92px}.container{width:calc(100% - 40px)}.header-inner{min-height:76px}.brand{width:255px}.header-nav{gap:18px}.header-nav a:nth-child(n+3){display:none}.hero{padding:39px 0 38px}.hero-grid{grid-template-columns:1fr 1fr;gap:27px;align-items:start}.hero-figure{align-self:center}.hero-figure img{aspect-ratio:.76}.hero-figure figcaption{font-size:11px;gap:10px}.hero-figure .image-index{display:none}h1{font-size:37px}.hero-copy .notice{font-size:12px}.byline{font-size:11px}.hero-copy .lead{font-size:15px}.hero-copy p{font-size:13px}.content-grid{display:block;padding-top:37px}.sidebar{display:none}.mobile-toc{display:block;background:var(--pale);border:1px solid var(--line);border-radius:6px;padding:17px 20px;margin-bottom:37px}.mobile-toc summary{font-size:14px}.mobile-toc .toc{padding-bottom:0}.article-section.level-2:first-of-type{border-top:0;padding-top:0;margin-top:0}.overview-strip{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:24px;padding-block:25px}.overview-strip>a{padding-inline:18px}.overview-strip>a:first-child,.overview-strip>a:nth-child(3){padding-left:0}.overview-strip>a:nth-child(2){border-right:0}.card-arrow{right:16px}.footer-grid{grid-template-columns:repeat(3,1fr);gap:20px 35px}.footer-bottom-grid{gap:40px}}
@media(max-width:560px){body{font-size:16px;line-height:1.8}.container{width:calc(100% - 36px)}.topline{font-size:10px;letter-spacing:0}.topline .container{padding-block:7px;gap:8px}.header-inner{min-height:68px;gap:16px}.brand{width:228px;padding:9px 0}.header-nav{display:none}.hero{padding:31px 0 29px}.hero-grid{display:flex;flex-direction:column;gap:28px}.hero-copy{width:100%}.eyebrow{font-size:10px;gap:9px;letter-spacing:.09em}h1{font-size:39px;line-height:1.13;margin-top:18px;margin-bottom:19px;letter-spacing:-.04em}.byline{margin-bottom:22px;font-size:11px;gap:8px}.hero-copy .lead{font-size:16px;line-height:1.75}.hero-copy p{font-size:14px;line-height:1.8}.hero-copy .notice{font-size:13px;margin:21px 0;padding:16px 18px}.hero-figure{width:100%}.hero-figure img{aspect-ratio:1.5}.hero-figure figcaption{font-size:11px}.hero-figure .image-index{display:block}.primary-link{font-size:13px;padding:12px 18px;gap:32px}.overview-strip{padding-block:24px;row-gap:24px}.overview-strip>a{padding-left:17px;padding-right:12px}.overview-strip strong{font-size:17px;line-height:1.5;margin-top:6px}.overview-strip>a>span:not(.card-label):not(.card-arrow){font-size:10px}.card-label{font-size:8px;letter-spacing:.02em}.card-arrow{display:none}.content-grid{padding-top:30px;padding-bottom:33px}h2{font-size:29px;line-height:1.25;margin-bottom:20px}h3{font-size:21px;line-height:1.4}h5{font-size:17px}.article-section{margin-bottom:32px}.article-section.level-2{margin-top:45px;padding-top:30px}.article-section p{margin-bottom:18px}.article-section ul,.article-section ol{padding-left:21px}.article-section li{margin-bottom:12px}.table-scroll{margin:24px 0}table{font-size:13px;min-width:540px}th,td{padding:14px 15px}caption{font-size:11px;padding:14px 15px}.notice{font-size:14px;padding:18px}.profile{padding:21px 19px;font-size:15px}.profile>strong{font-size:17px}.calculation{padding:23px 21px;font-size:15px}.calculation strong{font-size:16px}figure{margin-top:29px}figcaption{font-size:12px}.source-note{font-size:11px}.sources{padding:18px 16px}.sources summary{font-size:14px}.sources ol{font-size:12px;overflow-wrap:anywhere}.faq summary{font-size:15px;padding-block:19px}.faq details p{font-size:14px}.author-box{padding:22px;gap:17px}.author-box img{width:70px;height:70px}.author-box strong{font-size:17px}.author-box span{font-size:12px}.site-footer{padding-top:37px}.site-footer h2{font-size:27px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 25px;padding-bottom:20px}.footer-bottom-grid{display:block;padding-top:31px}.footer-bottom-grid h2{font-size:18px}.footer-base{flex-wrap:wrap;gap:10px 20px;font-size:10px}.footer-base a{margin-left:auto}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.topline,.site-header,.sidebar,.mobile-toc,.overview-strip,.primary-link,.footer-grid,.footer-base{display:none}.container{width:100%}.hero{padding:0;background:none}.hero-grid{display:block}.hero-figure{max-width:500px;margin-top:25px}.content-grid{display:block;padding:30px 0}.article-section{break-inside:auto}.table-scroll{overflow:visible}table{min-width:0;font-size:10pt}.site-footer{background:none;color:#233746}.site-footer h2,.site-footer h5,.site-footer a{color:#102e49}body{font-size:11pt}h2{font-size:23pt}h3{font-size:17pt}h1,h2,h3,h5{break-after:avoid}.author-box{break-inside:avoid}}