:root{
  --bg:#ffffff; --surface:#f5f7fa; --surface-2:#eef2f7; --text:#152033; --muted:#55627a;
  --line:#dde3ec; --brand:#14284b; --accent:#10a37f; --accent-ink:#0b7a5f; --link:#1d4fd7;
  --warn-bg:#fff6e5; --warn-line:#f0c36d; --warn-ink:#6b4a00; --ok-bg:#e9f8f2;
  --radius:12px; --maxw:1160px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e1525;--surface:#152036;--surface-2:#1b2842;--text:#e7ecf5;--muted:#a3afc4;--line:#2a3854;
    --brand:#2b4a80;--accent:#2fd0a4;--accent-ink:#5fe0bc;--link:#8fb2ff;--warn-bg:#2b2412;--warn-line:#7a5d1d;--warn-ink:#f3d79a;--ok-bg:#12302a}
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.65 var(--font);overflow-wrap:break-word}
img,svg,video{max-width:100%;height:auto}
a{color:var(--link)}
a:hover{text-decoration-thickness:2px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--bg);padding:8px;z-index:9}
/* header */
.site-header{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:5}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:19px;color:var(--text);text-decoration:none}
.main-nav{display:flex;gap:4px;flex-wrap:wrap}
.main-nav a{color:var(--text);text-decoration:none;padding:6px 10px;border-radius:8px;font-size:15px}
.main-nav a:hover{background:var(--surface)}
@media (max-width:640px){.header-inner{padding-top:8px;padding-bottom:6px}.main-nav{width:100%;flex-wrap:wrap;gap:0;margin:0 -8px}.main-nav a{padding:6px 7px;font-size:14px}.site-header{position:static}}
.risk-bar{background:var(--warn-bg);border-bottom:1px solid var(--warn-line);color:var(--warn-ink);font-size:14px;line-height:1.45}
.risk-bar .wrap{padding-top:8px;padding-bottom:8px}.risk-bar a{color:inherit}
.breadcrumb{font-size:14px;color:var(--muted);margin:14px auto 0}
.breadcrumb ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:4px}
.breadcrumb li+li::before{content:"/";margin-right:4px;color:var(--line)}
.breadcrumb a{color:var(--muted)}
/* layout */
.layout{display:block;padding-top:8px;padding-bottom:48px}
@media (min-width:1000px){.layout.has-toc{display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px}}
.content{min-width:0;max-width:760px}
.layout:not(.has-toc) .content{margin:0 auto}
.t-home .content,.t-hub .content{max-width:none}
/* toc */
.toc{font-size:15px}
.toc details{border:1px solid var(--line);border-radius:var(--radius);padding:10px 14px;margin:12px 0;background:var(--surface)}
.toc summary{font-weight:600;cursor:pointer}
.toc ol{margin:8px 0 0;padding-left:26px}.toc li{margin:4px 0}
.toc a{color:var(--muted);text-decoration:none}.toc a:hover{color:var(--link)}
@media (min-width:1000px){.toc{position:sticky;top:76px;align-self:start;max-height:calc(100vh - 96px);overflow:auto}.toc details{background:none;border:0;padding:0;margin-top:28px}.toc summary{list-style:none;color:var(--muted);text-transform:uppercase;font-size:12px;letter-spacing:.06em}.toc summary::-webkit-details-marker{display:none}}
/* typography */
h1{font-size:clamp(28px,5vw,40px);line-height:1.15;margin:22px 0 10px;letter-spacing:-.01em}
h2{font-size:clamp(22px,3.4vw,27px);line-height:1.25;margin:40px 0 10px;scroll-margin-top:80px}
h3{font-size:19px;margin:26px 0 6px}
p,ul,ol{margin:0 0 16px}
li{margin:4px 0}
.meta{color:var(--muted);font-size:14px;margin-bottom:18px}
.lede{font-size:19px;color:var(--muted)}
.quick-answer{background:var(--ok-bg);border-left:4px solid var(--accent);border-radius:8px;padding:14px 16px;margin:18px 0 24px}
.quick-answer strong{display:block;font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--accent-ink);margin-bottom:4px}
.callout{background:var(--warn-bg);border:1px solid var(--warn-line);color:var(--warn-ink);border-radius:8px;padding:12px 16px;margin:20px 0}
.callout a{color:inherit}
table{border-collapse:collapse;width:100%;margin:12px 0 20px;font-size:15px;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--surface)}
figure{margin:20px 0}figcaption{font-size:14px;color:var(--muted)}
code{background:var(--surface-2);padding:1px 5px;border-radius:5px;font-size:.92em}
/* faq + sources */
.faq details{border-bottom:1px solid var(--line);padding:10px 0}
.faq summary{font-weight:600;cursor:pointer}
.faq details>div{padding-top:6px}
.sources{font-size:15px}.sources li{margin:6px 0}
.related{border-top:1px solid var(--line);margin-top:36px;padding-top:12px}
.cta{display:block;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin:28px 0;background:var(--surface);text-decoration:none;color:var(--text)}
.cta span{display:block;font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--accent-ink)}
.cta strong{font-size:19px}
.btn{display:inline-block;background:var(--accent);color:#04241b;font-weight:700;border:0;border-radius:10px;padding:11px 18px;text-decoration:none;font-size:16px;cursor:pointer}
.btn.secondary{background:var(--surface-2);color:var(--text)}
/* cards / hubs */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:14px 0 26px;padding:0;list-style:none}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:16px;background:var(--bg);margin:0}
.card a{font-weight:700;text-decoration:none;font-size:18px}
.card p{color:var(--muted);font-size:15px;margin:6px 0 0}
.card.soon{background:var(--surface);color:var(--muted)}
.card.soon .t{font-weight:700;font-size:18px}
.badge{display:inline-block;font-size:12px;border:1px solid var(--line);border-radius:999px;padding:1px 8px;margin-left:6px;color:var(--muted);font-weight:500}
.hero{padding:28px 0 8px}
.hero h1{font-size:clamp(30px,6vw,48px);max-width:820px}
.paths{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:22px 0}
.path{border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:var(--text);background:var(--surface)}
.path b{display:block;font-size:19px;margin-bottom:4px}.path span{color:var(--muted);font-size:15px}
/* tools */
.tool{border:1px solid var(--line);border-radius:var(--radius);padding:18px;background:var(--surface);margin:20px 0}
.tool .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.tool label{display:block;font-size:14px;font-weight:600;margin-bottom:4px}
.tool input,.tool select{width:100%;font:inherit;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--text)}
.tool .out{margin-top:16px;border-top:1px solid var(--line);padding-top:12px}
.tool .out dl{display:grid;grid-template-columns:1fr auto;gap:4px 14px;margin:0}
.tool .out dt{color:var(--muted)}.tool .out dd{margin:0;font-weight:700;text-align:right;font-variant-numeric:tabular-nums}
.tool .neg{color:#c0392b}
/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--surface);padding:30px 0 18px;font-size:15px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr}}
.site-footer nav a{display:block;color:var(--muted);text-decoration:none;margin:4px 0}
.foot-h,.brand-foot{font-weight:700;margin-bottom:6px}
.fine{font-size:13px;color:var(--muted)}
.subscribe label{display:block;font-weight:600;margin:10px 0 6px}
.sub-row{display:flex;gap:8px;flex-wrap:wrap}
.sub-row input{flex:1 1 180px;min-width:0;font:inherit;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--text)}
.sub-row button,.form button{font:inherit;font-weight:700;background:var(--accent);color:#04241b;border:0;border-radius:8px;padding:9px 14px;cursor:pointer}
.form label{display:block;font-weight:600;margin:12px 0 4px}
.form input,.form textarea{width:100%;font:inherit;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--text)}