:root{
  --ink:#111827;--ink2:#4b5563;--line:#e5e7eb;--bg:#fff;--soft:#f6f8fb;
  --brand:#2563eb;--brand-d:#1d4ed8;--accent:#0891b2;--radius:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
.wrap.wide{max-width:1080px}
a{color:var(--brand-d)}
h1,h2,h3{line-height:1.25;color:var(--ink)}
h1{font-size:clamp(1.7rem,4vw,2.5rem);letter-spacing:-.02em;margin:.2em 0 .3em}
h2{font-size:1.4rem;margin:1.8em 0 .5em}
h3{font-size:1.1rem;margin:1.4em 0 .4em}
p{margin:0 0 1rem}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.74rem;font-weight:700;color:var(--brand)}
.lead{font-size:1.12rem;color:var(--ink2)}
header.site{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.site .bar{display:flex;align-items:center;justify-content:space-between;height:60px;max-width:1080px;margin:0 auto;padding:0 20px}
.logo{font-weight:800;letter-spacing:-.02em;color:var(--ink);text-decoration:none;font-size:1.02rem}
.logo span{color:var(--brand)}
nav.top a{margin-left:20px;text-decoration:none;color:var(--ink2);font-weight:600;font-size:.93rem}
nav.top a:hover{color:var(--brand-d)}
.crumbs{font-size:.85rem;color:var(--ink2);padding:16px 0 0}
.crumbs a{color:var(--ink2)}
.byline{color:var(--ink2);font-size:.9rem;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:22px}
article{padding:6px 0 20px}
article ul{padding-left:1.1rem}article li{margin-bottom:.4rem}
.tldr{background:var(--soft);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:10px;padding:16px 18px;margin:18px 0}
.tldr p:last-child{margin-bottom:0}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
.card:hover{border-color:var(--brand);box-shadow:0 4px 14px rgba(37,99,235,.08)}
.card h3{margin:0 0 4px}
.card p{color:var(--ink2);margin:0;font-size:.92rem}
table.def{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:16px 0}
table.def th,table.def td{padding:11px 13px;text-align:left;border-bottom:1px solid var(--line);font-size:.93rem}
table.def th{background:var(--soft);font-weight:700}
table.def tr:last-child td{border-bottom:0}
.next{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:20px;margin:26px 0}
.next h3{margin-top:0}
.next a{font-weight:700}
.related{background:var(--soft);border-top:1px solid var(--line);padding:24px 0;margin-top:18px}
.related a{display:inline-block;margin:4px 12px 4px 0;font-weight:600}
footer.site{border-top:1px solid var(--line);padding:30px 0;color:var(--ink2);font-size:.88rem}
footer.site a{color:var(--ink2);text-decoration:none;margin-right:16px}
.src{font-size:.82rem;color:var(--ink2)}
@media(max-width:760px){.g3,.g2{grid-template-columns:1fr}nav.top a:nth-child(-n+2){display:none}}