:root{--ink:#14212b;--muted:#566570;--bg:#f7f9fa;--card:#fff;--line:#dde4e8;--brand:#0b3d5c;--brand-2:#1b6e94;--accent:#fff6dc;--r:10px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand-2)}a:hover{color:var(--brand)}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:9}
.site-header{background:var(--brand);color:#fff}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:60px;gap:12px;flex-wrap:wrap}
.logo{color:#fff;text-decoration:none;font-weight:700;font-size:1.15rem}
.logo-mark{display:inline-block;background:#fff;color:var(--brand);border-radius:6px;padding:0 6px;margin-right:6px}
#site-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px;flex-wrap:wrap}
#site-nav a{color:#e3eef5;text-decoration:none;padding:8px 10px;border-radius:6px;display:block;font-size:.95rem}
#site-nav a:hover,#site-nav a[aria-current=page]{background:rgba(255,255,255,.15);color:#fff}
.nav-toggle{display:none;background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5);border-radius:6px;padding:6px 12px;font:inherit}
main{padding:28px 20px 48px}
h1{font-size:clamp(1.6rem,4.5vw,2.3rem);line-height:1.2;margin:.2em 0 .5em}
h2{font-size:1.35rem;margin:1.8em 0 .5em;line-height:1.3}
h3{font-size:1.1rem;margin:1.4em 0 .4em}
.lede{font-size:1.12rem;color:#26343d}
.small,.tm{font-size:.86rem;color:var(--muted)}
.callout{background:var(--accent);border:1px solid #efd88f;border-radius:var(--r);padding:12px 16px;margin:18px 0}
.note{background:#eaf3f8;border:1px solid #c7dde9;border-radius:var(--r);padding:12px 16px;margin:18px 0}
.btn{display:inline-block;background:var(--brand-2);color:#fff;text-decoration:none;padding:12px 18px;border-radius:8px;font-weight:600}
.btn:hover{background:var(--brand);color:#fff}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin:24px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;text-decoration:none;color:inherit;display:block}
a.card:hover{border-color:var(--brand-2)}.card h2,.card h3{margin:0 0 6px;font-size:1.12rem}
.tag{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:2px 8px;border-radius:99px;background:#dcebf3;color:var(--brand)}
.tag.soon{background:#eee;color:#555}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:10px 16px;margin:16px 0;font-size:.95rem}
.toc ol{margin:6px 0;padding-left:1.3em}
.table-wrap{overflow-x:auto;margin:12px 0}
table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);font-size:.93rem}
caption{text-align:left;font-size:.85rem;color:var(--muted);padding:6px 0}
th,td{border-top:1px solid var(--line);padding:9px 10px;vertical-align:top;text-align:left}
thead th{background:#eef3f6;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;border-top:0}
li{margin:4px 0}
sup a{text-decoration:none;font-size:.8em}
.sources li{margin:0 0 8px;word-break:break-word;font-size:.93rem}
.site-footer{border-top:1px solid var(--line);background:#fff;padding:20px 0;font-size:.9rem}
@media (max-width:700px){
 .nav-toggle{display:block}
 #site-nav{display:none;width:100%}#site-nav.open{display:block}
 #site-nav ul{flex-direction:column;padding-bottom:10px}
}