:root{
 --bg:#081019;--panel:#0e1925;--panel2:#122130;--ink:#eef7fb;--muted:#9db1bf;--line:#213647;
 --lab:#63e6be;--electric:#7dd3fc;--warn:#f7c873;--white:#ffffff;--max:1220px;--radius:16px;
 --shadow:0 24px 70px rgba(0,0,0,.28)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.05;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:28px 28px}
a{color:var(--electric);text-underline-offset:3px}.wrap{width:min(var(--max),calc(100% - 36px));margin:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;background:white;color:#111;padding:10px;z-index:999}
.sitebar{position:sticky;top:0;z-index:80;background:rgba(8,16,25,.93);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.topline{display:flex;align-items:center;gap:22px;min-height:74px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:900;letter-spacing:-.02em}.logo{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;border:1px solid #345166;background:linear-gradient(145deg,#132435,#0a141e);font-family:ui-monospace,monospace;color:var(--lab);font-size:18px}.brand small{display:block;color:var(--muted);font-weight:600;font-size:10px;letter-spacing:.12em;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:15px;margin-left:auto}.nav>a,.dropbtn{color:var(--ink);text-decoration:none;font-size:13px;font-weight:750;background:none;border:0;cursor:pointer}.drop{position:relative}.mega{display:none;position:absolute;right:-260px;top:34px;width:min(860px,92vw);padding:22px;background:#0d1924;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);grid-template-columns:repeat(4,1fr);gap:18px}.drop:hover .mega,.drop:focus-within .mega{display:grid}.mega h4{margin:0 0 8px;font-size:12px;color:var(--lab);text-transform:uppercase;letter-spacing:.1em}.mega a{display:block;color:#d8e5ec;text-decoration:none;font-size:13px;padding:5px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 16px;border-radius:10px;border:1px solid var(--lab);background:var(--lab);color:#04110d!important;text-decoration:none!important;font-weight:900}.btn.ghost{background:transparent;color:var(--lab)!important}.btn:hover{filter:brightness(1.04);transform:translateY(-1px)}
.hero{padding:86px 0 62px;position:relative;overflow:hidden}.hero:after{content:"LAB / SYSTEMS";position:absolute;right:-30px;top:40px;font:900 120px/1 ui-monospace,monospace;color:rgba(125,211,252,.035);transform:rotate(-7deg)}
.eyebrow{font:800 12px/1.2 ui-monospace,monospace;letter-spacing:.13em;text-transform:uppercase;color:var(--lab)}h1,h2,h3{line-height:1.12;letter-spacing:-.025em}h1{font-size:clamp(43px,7vw,82px);max-width:980px;margin:14px 0 20px}h2{font-size:clamp(29px,4vw,43px);margin:0 0 15px}h3{font-size:22px;margin:0 0 10px}.lede{max-width:760px;color:#b6cad6;font-size:19px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:28px}.chip{border:1px solid #294154;color:#bcd0db;border-radius:999px;padding:6px 10px;font-size:12px}
.section{padding:58px 0}.section.alt{background:#0a141e;border-block:1px solid #14283a}.sectionhead{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:26px}.sectionhead p{max-width:620px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.grid.four{grid-template-columns:repeat(4,1fr)}.card{background:linear-gradient(180deg,#101d29,#0c1721);border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}.card:hover{border-color:#3e6177}.card .num{font:900 11px ui-monospace,monospace;color:var(--lab);letter-spacing:.1em}.card p{color:var(--muted);font-size:14px}.card a.title{display:block;color:var(--ink);font-weight:850;font-size:20px;text-decoration:none;line-height:1.15;margin:8px 0}.mini{font-size:12px;color:var(--muted)}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.flowstep{border:1px solid var(--line);padding:18px;border-radius:14px;background:#0d1924;min-height:132px}.flowstep b{display:block;color:var(--lab);font:800 11px ui-monospace,monospace;text-transform:uppercase;letter-spacing:.11em}.flowstep strong{display:block;margin:8px 0}.flowstep p{font-size:13px;color:var(--muted);margin:0}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:42px;align-items:start}.article{max-width:790px}.breadcrumbs{font-size:12px;color:var(--muted);padding:22px 0}.breadcrumbs a{color:var(--muted)}.articlehead{padding:30px 0 22px}.articlehead h1{font-size:clamp(40px,6vw,68px)}.meta{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.meta span{font:700 11px ui-monospace,monospace;border:1px solid var(--line);border-radius:6px;padding:6px 8px;color:#b8cbd6}.article p,.article li{font-size:17px;color:#d3e0e7}.article h2{margin-top:48px}.article h3{margin-top:30px}.article table{width:100%;border-collapse:collapse;margin:22px 0;background:#0c1721}.article th,.article td{padding:13px;border:1px solid var(--line);vertical-align:top;text-align:left}.article th{color:var(--lab);background:#101f2d}.article code{background:#122231;padding:2px 5px;border-radius:4px}.quick{border-left:4px solid var(--lab);background:#0f1d29;padding:20px 22px;border-radius:0 14px 14px 0;margin:28px 0}.quick strong{color:var(--lab)}
.toc{border:1px solid var(--line);border-radius:14px;padding:18px 20px;background:#0c1721;margin:25px 0}.toc b{font:800 11px ui-monospace,monospace;color:var(--lab);text-transform:uppercase}.toc a{display:inline-block;margin:8px 14px 0 0;font-size:13px}
.sidebar{position:sticky;top:96px}.labbox{background:#0f1c28;border:1px solid #2b4659;border-radius:16px;padding:21px;margin-bottom:14px}.labbox h3{font-size:19px}.labbox p{font-size:13px;color:var(--muted)}.labbox .btn{width:100%}
.score{display:grid;grid-template-columns:1fr auto;gap:8px;border-bottom:1px solid var(--line);padding:9px 0;font-size:13px}.score:last-child{border:0}.score b{color:var(--lab)}
.cta{border:1px solid #355c6c;background:linear-gradient(135deg,#10293a,#0f322b);border-radius:18px;padding:25px;margin:38px 0}.cta h3{font-size:26px}.cta p{color:#bed2dc}.disclosure{font-size:11px!important;color:#8fa5b2!important}
.clusterstrip{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:28px 0}.clusterstrip a{border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;color:#dbe9ef;background:#0d1924;font-size:13px}
.faq details{border-top:1px solid var(--line);padding:15px 0}.faq summary{font-weight:800;cursor:pointer}.source{font-size:13px;color:var(--muted);border-top:1px dashed #2a4354;padding-top:15px}
footer{border-top:1px solid var(--line);padding:48px 0 90px;background:#071018}.footergrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}footer a{display:block;color:#afc4cf;text-decoration:none;margin:6px 0;font-size:13px}footer h4{margin:0 0 12px;color:var(--ink)}
.mobilecta{display:none;position:fixed;left:10px;right:10px;bottom:10px;z-index:99;box-shadow:var(--shadow)}
@media(max-width:980px){.nav>a:not(.btn),.drop{display:none}.grid.four{grid-template-columns:repeat(2,1fr)}.grid{grid-template-columns:repeat(2,1fr)}.flow{grid-template-columns:1fr 1fr}.layout{grid-template-columns:1fr}.sidebar{display:none}.clusterstrip{grid-template-columns:1fr 1fr}.mobilecta{display:flex}.footergrid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.wrap{width:min(var(--max),calc(100% - 24px))}.hero{padding:54px 0 42px}.grid,.grid.four,.flow,.clusterstrip,.footergrid{grid-template-columns:1fr}.brand small{display:none}.sitebar .btn{padding:9px 10px;font-size:12px}.section{padding:42px 0}.sectionhead{align-items:start;flex-direction:column}.article p,.article li{font-size:16px}.hero:after{display:none}}

/* CTA visibility upgrade */
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:14px;
  flex:0 0 auto;
}
.header-cta{
  min-width:150px;
  box-shadow:0 8px 24px rgba(99,230,190,.20);
  white-space:nowrap;
}
.header-cta:before{
  content:"↗";
  margin-right:7px;
  font-weight:900;
}
.sidebar .labbox.cta-box{
  border-color:#3f6b74;
  background:linear-gradient(180deg,#10293a,#0c211c);
}
.sidebar .labbox.cta-box .btn{
  margin-top:6px;
}
.sitewide-rail{
  position:fixed;
  right:16px;
  bottom:18px;
  z-index:75;
  display:flex;
  align-items:center;
  gap:10px;
  background:#0f1c28;
  border:1px solid #315467;
  border-radius:12px;
  padding:10px 12px;
  box-shadow:0 18px 45px rgba(0,0,0,.30);
}
.sitewide-rail span{
  color:#c8d9e2;
  font-size:12px;
  max-width:170px;
  line-height:1.25;
}
.sitewide-rail .btn{
  padding:9px 12px;
  font-size:12px;
}
@media(max-width:980px){
  .header-actions{margin-left:auto}
  .header-cta{min-width:auto}
  .sitewide-rail{display:none}
}
@media(max-width:620px){
  .header-cta{font-size:11px;padding:8px 9px}
  .header-cta span{display:none}
}