@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Libre+Franklin:wght@400;600;700;800&display=swap');
:root{--ink:#102b39;--muted:#546872;--line:#d5dee0;--paper:#f5f7f7;--green:#a6e5b8;--accent:#206746}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 'DM Sans',sans-serif}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:5px}a:focus-visible,summary:focus-visible{outline:3px solid #278356;outline-offset:5px}.wrap{max-width:1260px;margin:auto;padding:0 48px}.topline{background:var(--ink);color:#d3dfe4;font-size:12px;letter-spacing:1.7px;text-transform:uppercase;padding:9px 0}.topline .wrap{display:flex;justify-content:space-between}.header{display:flex;justify-content:space-between;align-items:center;gap:30px;padding-top:28px;padding-bottom:28px;border-bottom:1px solid var(--line)}.brand{font-family:'Libre Franklin',sans-serif;font-size:25px;font-weight:800;letter-spacing:-1.4px;white-space:nowrap}.brand span{color:var(--accent)}nav{display:flex;gap:27px;font-size:14px;font-weight:600;flex-wrap:wrap}nav a[aria-current=page]{color:var(--accent);text-decoration:underline;text-underline-offset:9px}.hero{padding:65px 0 55px;display:grid;grid-template-columns:1.5fr 1fr;gap:80px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin:0 0 20px}.hero h1,h1{font-family:'Libre Franklin',sans-serif;font-weight:600;font-size:clamp(38px,4.8vw,66px);line-height:1.1;letter-spacing:-2.8px;margin:0 0 25px}.hero h1 em{font-family:Georgia,serif;font-weight:400;color:var(--accent)}.hero p{max-width:600px;color:var(--muted)}.textlink{display:inline-block;font-size:14px;font-weight:700;border-bottom:1px solid currentColor;padding-bottom:5px;margin-top:12px}.brief{border-top:3px solid var(--ink);align-self:center;padding-top:22px}.brief h2{font-size:23px;line-height:1.4}.brief dl{margin:25px 0 0}.brief dl div{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding:10px 0;font-size:14px}.brief dt{color:var(--muted)}.brief dd{margin:0;font-weight:600}.section{padding:40px 0;border-top:1px solid var(--line)}.sectionhead{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:25px}.sectionhead h2{font-size:24px;letter-spacing:-.7px;margin:0}.sectionhead a{font-size:14px;text-decoration:underline;text-underline-offset:5px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.card{border-top:2px solid var(--ink);padding:24px 0}.card h3{font-family:'Libre Franklin',sans-serif;line-height:1.35;font-size:23px;letter-spacing:-.6px;margin:16px 0}.card p{font-size:16px;color:var(--muted)}.tag{font-size:12px;letter-spacing:1px;text-transform:uppercase;font-weight:600}.meta{color:var(--muted);font-size:13px}.feature{background:var(--ink);color:#fff;padding:44px;display:grid;grid-template-columns:1.5fr 1fr;gap:55px;margin-bottom:44px}.feature .eyebrow{color:var(--green)}.feature h2{font:400 36px/1.2 Georgia,serif;margin:12px 0 22px}.feature p{color:#cfdbdf}.featureaside{border-left:1px solid #49606a;padding-left:32px}.featureaside div{padding:14px 0;border-bottom:1px solid #49606a}.featureaside small{color:var(--green);margin-right:15px}.empty{background:#e8eeed;border-left:3px solid #407b60;padding:28px 32px}.empty h3{margin:0 0 8px;font-size:20px}.empty p{margin:0;color:var(--muted)}footer{margin-top:65px;padding:32px 0;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.footerrow{display:flex;justify-content:space-between;gap:30px}.pagehead{padding:58px 0 35px;max-width:900px}.pagehead h1{font-size:50px}.pagehead p{color:var(--muted);max-width:730px}.article{max-width:790px;margin:0 auto;padding:48px 0}.article h1{font-size:48px}.article h2{font-size:26px;margin-top:40px}.article p,.article li{color:#344e5a}.article a,.source a{text-decoration:underline;text-underline-offset:4px}.article .lead{font-size:22px;line-height:1.55}.note{border-left:3px solid var(--accent);padding:15px 22px;background:#e8eeed;font-size:15px}.row{display:grid;grid-template-columns:80px 1.5fr 1fr;gap:28px;padding:28px 0;border-top:1px solid var(--line)}.row h3{margin:0 0 8px;font-size:24px}.row p{margin:0;color:var(--muted);font-size:16px}.number{font:400 34px Georgia,serif;color:var(--accent)}details{padding:20px 0;border-top:1px solid var(--line)}summary{font-weight:600;cursor:pointer}.source{font-size:14px;color:var(--muted)}.skip{position:absolute;left:-9999px}.skip:focus{left:15px;top:15px;background:white;padding:10px;z-index:3}@media(max-width:850px){.wrap{padding:0 24px}.header{align-items:flex-start;flex-direction:column;gap:18px;padding-top:20px;padding-bottom:20px}nav{gap:15px;font-size:14px}.hero{grid-template-columns:1fr;gap:30px;padding:38px 0}.hero h1{font-size:48px}.brief{max-width:600px;width:100%}.grid{grid-template-columns:1fr}.feature{grid-template-columns:1fr;padding:28px;gap:20px}.featureaside{border-left:0;padding:0}.row{grid-template-columns:45px 1fr}.row>p{grid-column:2}.article h1,.pagehead h1{font-size:37px;letter-spacing:-1.5px}.topline .wrap span:last-child{display:none}.footerrow{flex-direction:column;gap:8px}.sectionhead{align-items:flex-start}.article{padding-top:32px}}@media print{nav,.topline,footer{display:none}body{background:white}.wrap{padding:0}.article{max-width:none}}
.header{gap:20px}.brand{font-size:22px;letter-spacing:-1px}nav{gap:20px}.languages{position:relative;border:0;padding:0;font-size:14px;flex-shrink:0}.languages>div{position:absolute;right:0;top:35px;background:white;box-shadow:0 5px 24px #102b3920;z-index:5;min-width:145px;padding:12px}.languages a{display:block;padding:5px 10px}.languages a[aria-current]{color:var(--accent);font-weight:700}.header:has(.languages[open]){position:relative;z-index:2}@media(max-width:1100px){.header{flex-wrap:wrap}.brand{margin-right:auto}nav{order:3;width:100%}.languages{align-self:center}.header{flex-direction:row}}

.feature{border-radius:16px}.card h2{font:600 24px/1.35 "Libre Franklin",sans-serif;letter-spacing:-.6px}.article h2{scroll-margin-top:24px}

.reference-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:36px 0}.reference-card{border:1px solid var(--line);border-radius:14px;padding:28px;background:white}.reference-card h2{font-size:25px;line-height:1.3}.reference-card p{color:var(--muted)}.reference-card .tag{color:var(--accent)}.reference-article>.eyebrow{margin-top:30px}.study-contents{background:#e8eeed;border:0;border-radius:12px;padding:20px 24px;margin:28px 0}.study-contents ol{padding-left:22px;margin-bottom:0}.study-contents li{padding:3px 0}.reference-article h3{margin-top:26px}.table-scroll{overflow-x:auto}.family-table{border-collapse:collapse;width:100%;font-size:15px}.family-table th,.family-table td{padding:12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}.family-table thead{background:#e8eeed}.family-table th[scope=row]{color:var(--accent)}.study-links{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.library-promo h2{font:400 32px/1.3 Georgia,serif}.library-promo{margin-top:20px}@media(max-width:700px){.reference-grid{grid-template-columns:1fr}.reference-card{padding:22px}.family-table{font-size:14px}.family-table th,.family-table td{padding:9px}.study-contents{padding:18px}}

.theme-toggle{border:1px solid var(--line);border-radius:20px;background:transparent;color:var(--ink);padding:8px 13px;font:inherit;font-size:12px;white-space:nowrap;cursor:pointer}.header{flex-wrap:wrap}.author{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);font-weight:700}.contents{padding:18px;border:1px solid var(--line);border-radius:12px}.contents summary{cursor:pointer}.card h2{font-size:23px;line-height:1.35}[data-theme=dark]{color-scheme:dark;--ink:#e1ebee;--muted:#abbfc6;--line:#354b56;--paper:#101c24;--accent:#a6e5b8}[data-theme=dark] .topline,[data-theme=dark] .feature{background:#1c3441}[data-theme=dark] .article p,[data-theme=dark] .article li{color:#c6d6dd}[data-theme=dark] .note,[data-theme=dark] .empty,[data-theme=dark] .languages div{background:#20343d}[data-theme=dark] .feature{color:#f0f6f8}button:focus-visible{outline:3px solid var(--accent);outline-offset:4px}

.consent{position:fixed;bottom:20px;left:20px;right:20px;max-width:680px;padding:22px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:16px;box-shadow:0 5px 30px #0004;z-index:20}.consent[hidden]{display:none}.consent p{font-size:14px}.consent button,.privacy-choice{padding:9px 14px;margin:4px;border:1px solid var(--accent);border-radius:8px;background:var(--paper);color:var(--ink);cursor:pointer;font:inherit;font-size:13px}
[data-theme=dark] .reference-card,[data-theme=dark] .study-contents,[data-theme=dark] .family-table thead{background:#20343d}[data-theme=dark] .skip:focus{background:#20343d}#site-search{display:flex;gap:12px;flex-wrap:wrap;align-items:center}#search-query{min-width:220px;flex:1;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink)}#site-search button{padding:12px 20px;background:var(--ink);color:var(--paper);border:0;border-radius:8px;cursor:pointer}@media print{.consent{display:none!important}[data-theme=dark]{--ink:#102b39;--muted:#546872;--paper:white}.article p,.article li{color:#102b39!important}}