:root{--ink:#1B2A3A;--accent:#1F5C4B;--accent-d:#164536;--mint:#EEF4F1;--paper:#FBF9F5;--line:#D8DFDC;--muted:#4F5D66;--white:#fff;--serif:Georgia,"Times New Roman",serif;--sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--paper);color:var(--ink);font:18px/1.65 var(--sans)}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-underline-offset:3px}
a:hover{color:var(--accent-d)}
:focus-visible{outline:3px solid #E0A72E;outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:8px;top:8px}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}
.wrap.narrow{max-width:780px}
h1,h2,h3{font-family:var(--serif);line-height:1.2;color:var(--ink);margin:0 0 .5em}
h1{font-size:clamp(2rem,4.6vw,3.1rem);letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2rem);margin-top:2.2em}
h3{font-size:1.25rem;margin-top:1.6em}
p,ul,ol{margin:0 0 1.1em}
li{margin-bottom:.4em}
.lead{font-size:1.2rem}
/* header */
.site-header{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.headbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:70px}
.brand{text-decoration:none;color:var(--ink);display:flex;flex-direction:column;line-height:1.15}
.brand-main{font-family:var(--serif);font-weight:700;font-size:1.25rem}
.brand-by{font-size:.78rem;color:var(--muted);letter-spacing:.04em}
.nav ul{list-style:none;margin:0;padding:0}
.nav>ul{display:flex;align-items:center;gap:6px}
.nav a{display:block;padding:10px 12px;text-decoration:none;color:var(--ink);font-size:.98rem;border-radius:6px}
.nav a:hover{background:var(--mint)}
.has-sub{position:relative}
.sub{display:none;position:absolute;left:0;top:100%;min-width:300px;background:var(--white);border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(27,42,58,.12);padding:8px;z-index:60}
.has-sub:hover>.sub,.has-sub:focus-within>.sub{display:block}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:8px 14px;font:inherit;color:var(--ink);cursor:pointer}
.btn{display:inline-block;background:var(--accent);color:#fff!important;text-decoration:none;font-weight:600;padding:14px 26px;border-radius:8px;border:2px solid var(--accent);transition:background .15s}
.btn:hover{background:var(--accent-d);border-color:var(--accent-d);color:#fff}
.nav .btn-small{padding:9px 16px;background:var(--accent);color:#fff}
.nav .btn-small:hover{background:var(--accent-d)}
/* hero */
.hero{background:var(--mint);padding:48px 0 56px;border-bottom:1px solid var(--line)}
.herogrid{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:center}
.heroimg img{border-radius:14px;box-shadow:0 16px 40px rgba(27,42,58,.18);max-width:400px;margin-left:auto}
.answer{font-size:1.2rem;line-height:1.6}
.pagehead{background:var(--mint);padding:28px 0 34px;border-bottom:1px solid var(--line)}
.pagehead h1{margin-top:.2em}
.crumbs ol{list-style:none;display:flex;gap:8px;padding:0;margin:0 0 14px;font-size:.88rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:8px;color:var(--muted)}
.byline{font-size:.92rem;color:var(--muted);margin:14px 0 0}
.signoff{font-size:.95rem;color:var(--muted);font-weight:600;margin-top:10px}
/* content */
.content{padding-top:12px;padding-bottom:40px}
.content h2:first-child{margin-top:1.4em}
.toc{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:16px 22px;margin:28px 0 8px}
.toc-title{font-weight:700;margin:0 0 6px;font-size:.95rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.toc ol{margin:0;padding-left:20px;font-size:.98rem}
.callout{background:var(--white);border-left:5px solid var(--accent);border-radius:0 10px 10px 0;padding:16px 22px;margin:1.6em 0;box-shadow:0 1px 0 var(--line)}
.callout p{margin:0 0 .4em}
.callout-title{font-weight:700;font-family:var(--serif);font-size:1.1rem}
.table-wrap{overflow-x:auto;margin:1.6em 0;border:1px solid var(--line);border-radius:10px;background:var(--white)}
table{border-collapse:collapse;width:100%;font-size:.95rem;min-width:560px}
caption{caption-side:top;text-align:left;font-weight:700;padding:12px 16px;font-family:var(--serif);font-size:1.05rem}
th,td{padding:11px 16px;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
thead th{background:var(--ink);color:#fff;font-weight:600;border-top:0}
tbody th{background:var(--mint);font-weight:700}
figure{margin:1.6em 0}
figure img{border-radius:12px}
/* faq */
.faq{margin-top:2.4em}
details{background:var(--white);border:1px solid var(--line);border-radius:10px;margin:0 0 10px}
summary{cursor:pointer;padding:15px 20px;font-weight:600;list-style:none;position:relative;padding-right:46px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:20px;top:11px;font-size:1.5rem;color:var(--accent);line-height:1}
details[open] summary::after{content:"\2212"}
.faq-a{padding:0 20px 6px}
/* sources */
.sources{margin-top:2.4em;font-size:.92rem;color:var(--muted)}
.sources h2{font-size:1.2rem;margin-top:0}
.sources li{overflow-wrap:anywhere}
/* related */
.related{background:var(--white);border-top:1px solid var(--line);padding:8px 0 48px}
.related h2{max-width:1120px;margin:1.6em auto .8em;padding:0 20px}
.cards{list-style:none;padding:0 20px;margin:0 auto;max-width:1120px;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.cards li{margin:0}
.cards a{display:block;height:100%;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px 20px;text-decoration:none;color:var(--ink)}
.cards a:hover{border-color:var(--accent);box-shadow:0 6px 18px rgba(27,42,58,.1)}
.card-t{display:block;font-family:var(--serif);font-weight:700;font-size:1.1rem;margin-bottom:6px;color:var(--accent)}
.card-d{display:block;font-size:.95rem;color:var(--muted);line-height:1.5}
/* cta */
.cta-band{background:var(--ink);color:#fff;padding:44px 0;margin:2.4em 0 0;text-align:left}
.cta-band h2{color:#fff;margin-top:0}
.cta-band p{color:#E7EEF0}
.cta-band .btn{background:#2F9E7F;border-color:#2F9E7F;color:#0E1A24!important}
.cta-band .btn:hover{background:#3DB391;border-color:#3DB391}
.cta-band .signoff{color:#B9C8D0}
.content .cta-band{border-radius:14px;padding:30px 26px;margin:2em 0}
/* footer */
.site-footer{background:#111C27;color:#C9D5DB;padding:44px 0 24px;font-size:.95rem}
.site-footer a{color:#E7EEF0}
.footgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr .7fr;gap:32px}
.site-footer ul{list-style:none;padding:0;margin:0}
.foot-brand{font-family:var(--serif);font-size:1.2rem;color:#fff;font-weight:700;margin-bottom:.4em}
.foot-h{font-weight:700;color:#fff;margin-bottom:.6em}
.legal{border-top:1px solid #2A3A4A;margin-top:28px;padding-top:16px;font-size:.85rem;color:#93A5B0}
.legal p{margin:0}
/* responsive */
@media(max-width:900px){
 .herogrid{grid-template-columns:1fr;gap:28px}
 .heroimg img{margin:0 auto;max-width:300px}
 .footgrid{grid-template-columns:1fr 1fr}
 .menu-btn{display:block}
 .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--white);border-bottom:1px solid var(--line);padding:8px 20px 20px}
 .nav.open{display:block}
 .nav>ul{flex-direction:column;align-items:stretch;gap:0}
 .sub{display:block;position:static;border:0;box-shadow:none;padding:0 0 0 14px;min-width:0}
 .has-sub>a{font-weight:700}
}
@media(max-width:560px){body{font-size:17px}.footgrid{grid-template-columns:1fr}.hero{padding:32px 0 40px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}