:root{
  --ink:#07111f;
  --ink-2:#0b1f3a;
  --blue:#0b2a52;
  --blue-2:#123f75;
  --gold:#f3c443;
  --gold-2:#ffd96a;
  --ivory:#f7f3ea;
  --white:#ffffff;
  --muted:#8fa0b8;
  --line:rgba(255,255,255,.14);
  --glass:rgba(255,255,255,.06);
  --shadow:0 24px 80px rgba(0,0,0,.22);
  --radius:28px;
  --max:1240px;
}

*{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(--ivory);
  line-height:1.6;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

.site-shell{
  min-height:100vh;
  background:
    radial-gradient(circle at 84% 12%, rgba(243,196,67,.20), transparent 26%),
    radial-gradient(circle at 15% 0%, rgba(61,124,197,.18), transparent 28%),
    var(--ink);
  color:var(--white);
}

.nav{
  position:sticky; top:0; z-index:50;
  backdrop-filter:blur(18px);
  background:rgba(7,17,31,.78);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-inner{
  max-width:var(--max); margin:auto; padding:16px 24px;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.04em}
.brand-mark{
  width:40px;height:40px;border-radius:13px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,var(--gold),#ffe79a);
  color:var(--ink);font-size:14px;font-weight:900;
  box-shadow:0 8px 30px rgba(243,196,67,.22);
}
.nav-links{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{
  padding:10px 13px;border-radius:999px;color:#dbe7f6;
  font-size:14px; transition:.25s ease;
}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.08);color:var(--white)}
.menu-toggle{display:none;border:1px solid var(--line);background:transparent;color:white;border-radius:12px;padding:9px 12px}

.hero{
  max-width:var(--max);margin:auto;padding:84px 24px 72px;
  display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;
}
.eyebrow{display:flex;align-items:center;gap:10px;text-transform:uppercase;letter-spacing:.2em;font-size:12px;color:var(--gold-2);font-weight:800}
.eyebrow::before{content:"";width:42px;height:2px;background:var(--gold)}
.hero h1{
  font-size:clamp(52px,8vw,108px);
  line-height:.92;letter-spacing:-.055em;margin:18px 0 26px;
  max-width:900px;
}
.hero .lead{font-size:20px;color:#c7d5e8;max-width:680px}
.meta-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:34px;
}
.meta-card{
  padding:18px;border:1px solid var(--line);background:var(--glass);
  border-radius:18px;
}
.meta-card small{display:block;color:var(--muted);text-transform:uppercase;letter-spacing:.12em;margin-bottom:5px}
.meta-card strong{font-size:15px}

.hero-art{
  position:relative;min-height:560px;border-radius:36px;overflow:hidden;
  border:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02)),
    linear-gradient(145deg,#0b2a52,#081322 68%);
  box-shadow:var(--shadow);
}
.orbit{position:absolute;border:1px solid rgba(255,255,255,.16);border-radius:50%}
.orbit.one{width:420px;height:420px;right:-60px;top:18px}
.orbit.two{width:300px;height:300px;right:10px;top:78px}
.orbit.three{width:180px;height:180px;right:70px;top:138px}
.core{
  position:absolute;width:126px;height:126px;border-radius:34px;right:112px;top:164px;
  background:linear-gradient(145deg,var(--gold),#fff0a6);color:var(--ink);
  display:grid;place-items:center;font-weight:1000;font-size:26px;
  transform:rotate(8deg);box-shadow:0 20px 50px rgba(243,196,67,.25)
}
.art-note{
  position:absolute;left:34px;bottom:34px;max-width:330px;
  background:rgba(255,255,255,.08);border:1px solid var(--line);
  backdrop-filter:blur(10px);padding:22px;border-radius:20px
}
.art-note span{color:var(--gold);font-weight:900}
.node{position:absolute;width:14px;height:14px;background:var(--gold);border-radius:50%;box-shadow:0 0 0 8px rgba(243,196,67,.08)}
.node.n1{right:80px;top:62px}.node.n2{right:256px;top:130px}.node.n3{right:26px;top:328px}.node.n4{right:222px;top:382px}

.section{
  padding:90px 24px;background:var(--ivory);color:var(--ink)
}
.section.dark{background:var(--ink);color:white}
.section-inner{max-width:var(--max);margin:auto}
.section-head{
  display:grid;grid-template-columns:.7fr 1.3fr;gap:40px;align-items:end;margin-bottom:42px
}
.kicker{font-size:12px;text-transform:uppercase;letter-spacing:.18em;font-weight:900;color:var(--blue-2)}
.dark .kicker{color:var(--gold)}
.section h2{font-size:clamp(38px,5vw,72px);line-height:1;letter-spacing:-.04em;margin:8px 0}
.section-intro{font-size:19px;color:#5a6878;max-width:720px}
.dark .section-intro{color:#b8c7d9}

.chapter-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.chapter-card{
  position:relative;min-height:320px;padding:30px;border-radius:var(--radius);
  border:1px solid rgba(11,42,82,.12);background:white;overflow:hidden;
  transition:.3s ease;box-shadow:0 16px 40px rgba(7,17,31,.06)
}
.chapter-card:hover{transform:translateY(-5px);box-shadow:0 24px 60px rgba(7,17,31,.11)}
.chapter-card .num{font-size:84px;line-height:1;font-weight:1000;color:rgba(11,42,82,.08);position:absolute;right:20px;top:14px}
.chapter-card h3{font-size:30px;line-height:1.05;max-width:360px;margin:60px 0 14px}
.chapter-card p{max-width:490px;color:#5f6c7b}
.chapter-card .go{display:inline-flex;gap:8px;align-items:center;margin-top:18px;font-weight:900;color:var(--blue-2)}

.feature-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.12);border-radius:24px;overflow:hidden
}
.feature{padding:28px;background:#0a1b31}
.feature b{display:block;font-size:32px;color:var(--gold);margin-bottom:8px}
.feature span{color:#c4d2e4}

.page-hero{
  background:var(--ink);color:white;padding:72px 24px 64px;
  border-bottom:1px solid rgba(255,255,255,.08)
}
.page-hero .inner{max-width:var(--max);margin:auto}
.breadcrumbs{color:#94a6bd;font-size:14px;margin-bottom:28px}
.page-hero h1{font-size:clamp(48px,7vw,92px);line-height:.96;letter-spacing:-.05em;margin:0 0 18px;max-width:980px}
.page-hero p{font-size:19px;color:#c6d4e6;max-width:760px}

.content{max-width:var(--max);margin:auto;padding:72px 24px 96px}
.content-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:56px;align-items:start}
.side-label{position:sticky;top:100px}
.side-label .index{font-size:96px;font-weight:1000;color:rgba(11,42,82,.08);line-height:1}
.side-label h3{font-size:18px;color:var(--blue)}
.prose h2{font-size:42px;letter-spacing:-.035em;line-height:1.05;margin:0 0 18px}
.prose h3{font-size:24px;margin-top:40px}
.prose p{font-size:18px;color:#44505e}
.callout{
  margin:32px 0;padding:26px 28px;border-radius:22px;background:#fff;
  border-left:5px solid var(--gold);box-shadow:0 18px 50px rgba(7,17,31,.08)
}
.callout strong{color:var(--blue)}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}
.mini-card{padding:22px;border-radius:20px;background:white;border:1px solid rgba(11,42,82,.10)}
.mini-card b{display:block;color:var(--blue);margin-bottom:8px}

.matrix{width:100%;border-collapse:collapse;margin-top:24px;background:white;border-radius:18px;overflow:hidden}
.matrix th,.matrix td{padding:16px;border-bottom:1px solid #e7ebf0;text-align:left;vertical-align:top}
.matrix th{background:var(--blue);color:white}
.matrix tr:last-child td{border-bottom:none}

.timeline{display:grid;gap:14px;margin-top:28px}
.step{display:grid;grid-template-columns:70px 1fr;gap:18px;align-items:start;padding:20px;border-radius:20px;background:white}
.step .dot{width:54px;height:54px;border-radius:16px;background:var(--gold);display:grid;place-items:center;font-weight:1000;color:var(--ink)}

.ref-list{display:grid;gap:14px}
.ref{padding:22px 24px;border:1px solid rgba(11,42,82,.10);border-radius:18px;background:white}
.ref b{color:var(--blue)}

.footer{background:#06101e;color:#b7c6d7;padding:34px 24px;border-top:1px solid rgba(255,255,255,.08)}
.footer-inner{max-width:var(--max);margin:auto;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer strong{color:white}

@media(max-width:900px){
  .nav-links{display:none}
  .nav-links.open{display:flex;position:absolute;left:16px;right:16px;top:72px;padding:14px;border-radius:18px;background:#07111f;border:1px solid var(--line);flex-direction:column;align-items:stretch}
  .menu-toggle{display:block}
  .hero{grid-template-columns:1fr;padding-top:54px}
  .hero-art{min-height:440px}
  .meta-grid,.chapter-grid,.cards-3,.feature-strip{grid-template-columns:1fr}
  .section-head,.content-grid{grid-template-columns:1fr}
  .side-label{position:relative;top:auto}
}