:root{
  --bg:#f5f7fa;
  --bg-alt:#eceff5;
  --ink:#0f1924;
  --ink-mid:#465469;
  --ink-soft:#5c697d;
  --brand:#1b3d6e;
  --accent:#2b7a78;
  --amber:#b87500;
  --rule:#d6dce8;
  --white:#fff;
  --dark:#0f1924;
  --serif:"IBM Plex Serif",Georgia,serif;
  --sans:"IBM Plex Sans",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
a:focus-visible,
button:focus-visible,
.table-wrap:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
}
section[id]{scroll-margin-top:84px}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:0;top:-100%;z-index:999;background:var(--accent);color:var(--white);padding:.55rem 1rem}
.skip:focus{top:0}
.site-nav{position:fixed;inset:0 0 auto 0;z-index:100;height:62px;display:flex;align-items:center;justify-content:space-between;gap:1.4rem;padding:0 2.4rem;background:rgba(245,247,250,.96);backdrop-filter:blur(14px);border-bottom:1px solid var(--rule)}
.site-brand{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:1.05rem;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{font-family:var(--mono);font-size:.62rem;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-soft)}
.nav-links a:hover,.nav-links a:focus{color:var(--accent)}
.nav-links .active{color:var(--ink)}
.nav-contact{border:1px solid var(--brand);color:var(--brand);padding:.42rem .82rem}
.nav-contact:hover,.nav-contact:focus{background:var(--brand);color:var(--white)}
main{padding-top:62px}
.hero{position:relative;min-height:calc(100svh - 62px);display:flex;align-items:center;background-color:var(--bg);background-image:radial-gradient(circle,rgba(27,61,110,.055) 1px,transparent 1px);background-size:28px 28px}
.hero:before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--accent)}
.hero-inner{position:relative;z-index:1;width:100%;max-width:1120px;margin:0 auto;padding:4.4rem 2.4rem;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.8fr);gap:4.5rem;align-items:center}
.hero.hero-compact{min-height:auto}
.hero.hero-compact .hero-inner{padding-top:6.5rem;padding-bottom:6.5rem}
.hero-inner.hero-inner-single{grid-template-columns:minmax(0,760px)}
.kicker{font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);margin-bottom:1.4rem}
h1,h2,h3,p{margin-top:0}
h1{font-family:var(--serif);font-weight:400;font-size:clamp(2.5rem,5.7vw,4.75rem);line-height:1.06;letter-spacing:0;margin-bottom:.85rem}
h1 em,h2 em{font-style:italic;color:var(--brand)}
.hero-lead{font-size:1rem;color:var(--ink-mid);max-width:620px;margin-bottom:.6rem}
.ja{display:block;font-size:.82em;color:var(--ink-soft);font-weight:300;margin-top:.25rem}
.hero-note{border-left:2px solid var(--accent);background:rgba(43,122,120,.09);padding:.8rem 1rem;color:var(--ink-mid);font-size:.86rem;max-width:610px;margin:1.4rem 0 2rem}
.actions{display:flex;gap:.9rem;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.35rem;min-height:44px;padding:.7rem 1.25rem;border:1px solid var(--brand);font-weight:500;font-size:.86rem}
.btn.primary{background:var(--brand);color:var(--white)}
.btn.primary:hover,.btn.primary:focus{background:var(--accent);border-color:var(--accent)}
.btn.secondary{color:var(--brand)}
.btn.secondary:hover,.btn.secondary:focus{background:var(--brand);color:var(--white)}
.dark .btn.secondary{border-color:rgba(255,255,255,.34);color:var(--white)}
.dark .btn.secondary:hover,.dark .btn.secondary:focus{border-color:var(--accent);background:rgba(43,122,120,.22);color:var(--white)}
.signal-panel{border:1px solid var(--rule);background:var(--white);padding:1.4rem;box-shadow:0 8px 28px rgba(27,61,110,.08)}
.signal-row{display:grid;grid-template-columns:34px 1fr auto;gap:1rem;align-items:center;padding:.85rem 0;border-top:1px solid var(--rule)}
.signal-row:first-child{border-top:0}
.sig-num{font-family:var(--mono);font-size:.68rem;color:var(--accent)}
.sig-title{font-family:var(--serif);font-size:1rem;line-height:1.25}
.sig-state{font-family:var(--mono);font-size:.62rem;color:var(--ink-soft);text-transform:uppercase}
.section{padding:5rem 0}
.section.alt{background:var(--bg-alt)}
.section.dark{background:var(--dark);color:var(--white)}
.wrap{max-width:1120px;margin:0 auto;padding:0 2.4rem}
.label{font-family:var(--mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:.55rem}
.dark .label{color:rgba(255,255,255,.48)}
h2{font-family:var(--serif);font-weight:400;font-size:clamp(1.8rem,3.4vw,2.75rem);line-height:1.12;margin-bottom:1.15rem}
.lead{font-size:.97rem;color:var(--ink-mid);max-width:720px;margin-bottom:2rem}
.dark .lead{color:rgba(255,255,255,.62)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem}
.card{min-width:0;white-space:normal;overflow-wrap:break-word;background:var(--white);border:1px solid var(--rule);padding:1.45rem;border-top:3px solid var(--rule)}
.card.accent{border-top-color:var(--accent)}
.card.brand{border-top-color:var(--brand)}
.card.amber{border-top-color:var(--amber)}
.card-title{font-family:var(--serif);font-size:1.08rem;line-height:1.25;margin-bottom:.45rem}
.card-meta{font-family:var(--mono);font-size:.62rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:.45rem}
.card p,.row p{font-size:.86rem;color:var(--ink-mid);margin-bottom:0}
.row-list{border-top:1px solid var(--rule)}
.row{display:grid;grid-template-columns:44px 210px 1fr;gap:1.2rem;padding:1rem 0;border-bottom:1px solid var(--rule)}
.row-num{font-family:var(--mono);font-size:.66rem;color:var(--accent)}
.row-name{font-family:var(--serif);font-size:1rem;line-height:1.25}
.note{border-left:2px solid var(--rule);padding:.85rem 1rem;color:var(--ink-soft);font-size:.85rem}
.dark .note{color:rgba(255,255,255,.48);border-left-color:rgba(255,255,255,.16)}
.scope-list{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.scope-list ul{margin:0;padding:0;list-style:none;border-top:1px solid var(--rule)}
.scope-list li{padding:.72rem 0;border-bottom:1px solid var(--rule);font-size:.88rem;color:var(--ink-mid)}
.dark-card{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);padding:1.5rem}
.dark-card p{color:rgba(255,255,255,.62);font-size:.88rem}
.contact-card{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);padding:1.6rem}
.contact-card a{color:#7cc8c3;text-decoration:underline;text-underline-offset:3px}
.evidence-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule)}
.evidence-link{min-width:0;background:var(--white);padding:1.15rem}
.evidence-link a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;font-weight:500}
.evidence-link p{margin:.45rem 0 0;font-size:.82rem;color:var(--ink-mid)}
.diagram-card{background:var(--white);border:1px solid var(--rule);padding:1.4rem;box-shadow:0 8px 28px rgba(27,61,110,.08)}
.table-wrap{overflow-x:auto}
.table-wrap table{min-width:680px}
table{width:100%;border-collapse:collapse}
th{font-family:var(--mono);font-size:.65rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);text-align:left;border-bottom:2px solid var(--rule);padding:.65rem .8rem .65rem 0;white-space:nowrap}
td{font-size:.86rem;color:var(--ink-mid);border-bottom:1px solid var(--rule);padding:.85rem .8rem .85rem 0;vertical-align:top}
footer{background:var(--dark);color:rgba(255,255,255,.55);padding:2.4rem 0;border-top:1px solid rgba(255,255,255,.08)}
.footer-grid{display:flex;justify-content:space-between;gap:2rem;align-items:flex-start;flex-wrap:wrap}
.footer-brand{font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:.5rem}
.footer-sub{font-size:.76rem;max-width:440px}
.footer-links{display:flex;gap:1.1rem;flex-wrap:wrap;justify-content:flex-end}
.footer-links a{font-size:.76rem;color:rgba(255,255,255,.5)}
.footer-links a:hover,.footer-links a:focus{color:#7cc8c3}
@media(max-width:920px){
  .site-nav{position:sticky;top:0;left:auto;right:auto;bottom:auto;height:auto;min-height:0;padding:.7rem 1.2rem 0;align-items:flex-start;flex-direction:column;gap:.45rem}
  main{padding-top:0}
  .nav-links{width:100%;flex-wrap:nowrap;justify-content:flex-start;gap:1rem;overflow-x:auto;scrollbar-width:thin;padding-bottom:.55rem}
  .nav-links a{display:inline-flex;align-items:center;min-height:40px;white-space:nowrap;flex:0 0 auto}
  .hero{min-height:auto}
  .hero-inner,.grid-2,.scope-list{grid-template-columns:1fr;gap:2rem}
  .grid-3{grid-template-columns:1fr}
  .evidence-links{grid-template-columns:1fr}
  .row{grid-template-columns:36px 1fr;gap:.75rem}
  .row p{grid-column:2}
  .wrap,.hero-inner{padding-left:1.4rem;padding-right:1.4rem}
  section[id]{scroll-margin-top:120px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}