:root{
  --ink:#10212b;--muted:#546570;--line:#d9e3e8;--paper:#f8fbfc;--white:#fff;
  --blue:#096b8f;--blue2:#0b87ad;--teal:#0e8178;--soft:#eaf6f9;--warm:#fff8ea;
  --radius:18px;--shadow:0 14px 34px rgba(16,33,43,.08);--max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--white);line-height:1.68}
a{color:var(--blue);text-decoration-thickness:1px;text-underline-offset:3px}
img{max-width:100%;height:auto}
.wrap{width:min(calc(100% - 32px),var(--max));margin:auto}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;background:#fff;padding:8px 12px;z-index:1000}
.topnote{background:#0d2936;color:#eaf6f9;font-size:.88rem;padding:7px 0;text-align:center}
header{border-bottom:1px solid var(--line);background:rgba(255,255,255,.97);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:850;letter-spacing:-.02em}
.brand svg{width:34px;height:34px}
nav{display:flex;gap:20px;align-items:center}
nav a{text-decoration:none;color:var(--ink);font-weight:650;font-size:.95rem}
.nav-cta,.button{display:inline-block;background:var(--blue);color:white;text-decoration:none;border-radius:999px;padding:11px 18px;font-weight:800;border:1px solid var(--blue)}
.button.secondary{background:white;color:var(--blue)}
.menu{display:none;background:none;border:0;font-size:1.4rem}
.hero{background:linear-gradient(145deg,#f7fbfc 0%,#e8f6fa 70%,#fefaf0 100%);padding:74px 0 64px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:50px;align-items:center}
.eyebrow{font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;font-weight:850;color:var(--teal)}
h1{font-size:clamp(2.25rem,5vw,4.35rem);line-height:1.03;letter-spacing:-.045em;margin:.25em 0 .3em}
h2{font-size:clamp(1.5rem,3vw,2.25rem);line-height:1.15;letter-spacing:-.025em;margin:1.7em 0 .55em}
h3{font-size:1.22rem;line-height:1.25;margin:1.35em 0 .35em}
.lede{font-size:1.18rem;color:#38505e;max-width:760px}
.hero-card,.card,.callout,.sourcebox,.comparison,.toc{border:1px solid var(--line);border-radius:var(--radius);background:white;box-shadow:var(--shadow)}
.hero-card{padding:26px}
.hero-card .pulse{height:110px;border-radius:14px;background:
  radial-gradient(circle at 25% 50%,rgba(11,135,173,.18),transparent 28%),
  repeating-radial-gradient(circle at 25% 50%,transparent 0 12px,rgba(9,107,143,.18) 13px 14px,transparent 15px 26px);
}
.section{padding:52px 0}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{padding:24px;box-shadow:none}
.card h3{margin-top:0}
.kicker{color:var(--muted);font-size:.92rem}
.breadcrumbs{font-size:.88rem;color:var(--muted);padding:20px 0 0}
.article{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:56px;align-items:start}
.prose{font-size:1.03rem}
.prose p{margin:0 0 1.15em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.35em 0}
.toc{padding:20px;position:sticky;top:100px;box-shadow:none}
.toc h2{font-size:1rem;margin:0 0 8px}
.toc a{display:block;font-size:.9rem;padding:5px 0;text-decoration:none}
.callout{padding:22px;margin:26px 0;background:var(--soft);box-shadow:none}
.callout.warning{background:var(--warm)}
.callout strong{display:block;margin-bottom:5px}
.cta{padding:26px;border-radius:var(--radius);background:#0d2936;color:white;margin:30px 0}
.cta h2,.cta h3{color:white;margin-top:0}
.cta p{color:#d5e2e8}
.cta .button{background:#fff;color:#0d2936;border-color:#fff}
.disclosure{font-size:.9rem;color:var(--muted);padding:12px 16px;border-left:3px solid var(--teal);background:#f8fbfc}
table{width:100%;border-collapse:collapse;margin:22px 0;font-size:.94rem}
th,td{border-bottom:1px solid var(--line);padding:12px 10px;text-align:left;vertical-align:top}
th{background:#f4f8fa}
.sourcebox{margin-top:38px;padding:22px;box-shadow:none}
.sourcebox h2{font-size:1.2rem;margin:0 0 8px}
.sourcebox li{font-size:.9rem}
.related{border-top:1px solid var(--line);margin-top:42px;padding-top:28px}
footer{margin-top:60px;background:#0d2936;color:#d5e2e8;padding:48px 0}
footer a{color:#eaf6f9}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
.footer-grid h3{color:white;font-size:1rem}
.small{font-size:.86rem;color:#6a7981}
.badge{display:inline-block;padding:5px 9px;border-radius:999px;background:#eaf6f9;color:#0e697d;font-size:.78rem;font-weight:800}
.specs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.spec{padding:12px;background:#f7fafb;border-radius:12px}
.spec b{display:block;font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
@media(max-width:860px){
  .hero-grid,.article,.grid3,.grid2,.footer-grid{grid-template-columns:1fr}
  nav{display:none;position:absolute;top:72px;left:0;right:0;background:white;padding:18px 22px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}
  nav.open{display:flex}.menu{display:block}.nav-cta{display:none}.toc{position:static;order:-1}
  .hero{padding-top:50px}.specs{grid-template-columns:1fr}
}

.article-visual{margin:26px 0 34px}
.article-visual img{display:block;width:100%;border-radius:18px;border:1px solid var(--line);background:#f8fbfc}
.article-visual figcaption{font-size:.84rem;color:var(--muted);margin-top:8px}
.hero-visual img{width:100%;display:block;border-radius:18px}