:root{
  --ink:#07162b;--deep:#0b2040;--line:rgba(160,205,235,.18);
  --text:#e4eef8;--muted:#9fb7cf;--cyan:#4fd6e6;--teal:#19c2b4;--sky:#5aa9e6;
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--text);
  font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--cyan)}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.narrow{max-width:820px}
.skip{position:absolute;left:-999px;top:8px;background:var(--cyan);color:#04101f;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}

header.site{position:sticky;top:0;z-index:50;background:rgba(7,22,43,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:84px}
.brand{display:block;text-decoration:none}
.plate{display:block;background:#f4f9fd;border-radius:12px;padding:3px 12px}
.plate img{display:block;height:64px;width:auto;mix-blend-mode:multiply}
nav ul{display:flex;gap:26px;list-style:none;margin:0;padding:0;align-items:center}
nav a{color:var(--muted);text-decoration:none;font-size:.95rem;font-weight:500}
nav a:hover{color:#fff}
.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-weight:700;text-decoration:none;
  background:linear-gradient(135deg,var(--cyan),var(--teal));color:#04101f;border:0;cursor:pointer}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid rgba(160,205,235,.4)}
.btn.ghost:hover{border-color:var(--cyan);color:#fff}
nav a.btn{color:#04101f;padding:9px 18px}
.menu-btn{display:none;background:none;border:1px solid var(--line);color:var(--text);border-radius:10px;padding:8px 12px;font-size:1rem}

.hero{position:relative;overflow:hidden;padding:130px 0 110px;
  background:radial-gradient(900px 520px at 85% 0%,rgba(25,194,180,.22),transparent 62%),
             radial-gradient(900px 600px at 0% 100%,rgba(90,169,230,.20),transparent 60%),var(--ink)}
#field{position:absolute;inset:0;width:100%;height:100%;opacity:1}
.hero-inner{position:relative;display:grid;grid-template-columns:1.5fr .7fr;gap:48px;align-items:center}
.hero-mark{justify-self:center}
.plate.big{padding:18px;border-radius:28px;box-shadow:0 0 80px rgba(79,214,230,.35)}
.plate.big img{height:auto;width:100%;max-width:300px}
.hero h1{font-size:clamp(2.3rem,5.4vw,4.2rem);line-height:1.08;margin:0 0 26px;max-width:14em;letter-spacing:-.02em;font-weight:700}
.lead{font-size:1.2rem;color:var(--muted);max-width:38em;margin:0 0 34px}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.facts-row{display:flex;gap:10px 28px;flex-wrap:wrap;margin:44px 0 0;padding:0;list-style:none;color:var(--muted);font-size:.95rem}
.facts-row li::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--cyan);margin-right:10px;box-shadow:0 0 10px var(--cyan)}

section{padding:96px 0;scroll-margin-top:84px}
section.band{background:var(--deep);border-block:1px solid var(--line)}
h2{font-size:clamp(1.8rem,3.4vw,2.7rem);line-height:1.15;margin:0 0 18px;letter-spacing:-.015em;max-width:20em}
h3{margin:0 0 8px;font-size:1.15rem;color:#fff}
.sub{color:var(--muted);max-width:42em;margin:0 0 48px;font-size:1.05rem}
p{margin:0 0 1em}

.rows{list-style:none;margin:0;padding:0}
.rows li{display:grid;grid-template-columns:minmax(220px,.8fr) 2fr;gap:12px 48px;padding:30px 0;border-top:1px solid var(--line)}
.rows li:last-child{border-bottom:1px solid var(--line)}
.rows h3{font-size:clamp(1.4rem,2.4vw,1.9rem);line-height:1.2;margin:0}
.rows p{margin:0;color:var(--muted);max-width:40em}

.starts{display:grid;gap:36px 40px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));margin-top:36px}
.starts article{border-left:3px solid var(--cyan);padding-left:20px}
.starts p{margin:0;color:var(--muted)}

.split{display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:start}
.ticks{list-style:none;margin:0;padding:0;display:grid;gap:18px}
.ticks li{padding-left:30px;position:relative;color:var(--muted)}
.ticks li::before{content:"";position:absolute;left:0;top:.6em;width:14px;height:2px;background:var(--cyan)}
.ticks strong{color:#fff;font-weight:600}
.split .sub{margin-bottom:20px}
.split p{color:var(--muted)}

.stack{margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:0 56px}
.stack div{padding:20px 0;border-top:1px solid var(--line)}
.stack dt{font-weight:600;color:#fff;margin-bottom:4px}
.stack dd{margin:0;color:var(--muted);font-size:.97rem}

.steps{list-style:none;margin:0;padding:0;display:grid;gap:0;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));counter-reset:s}
.steps li{counter-increment:s;padding:8px 28px 8px 0}
.steps li::before{content:counter(s);display:grid;place-items:center;width:38px;height:38px;border-radius:50%;
  border:1px solid var(--cyan);color:var(--cyan);font-weight:700;margin-bottom:16px}
.steps p{margin:0;color:var(--muted)}

.pairs{display:grid;gap:36px 56px;grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.pairs p{margin:0;color:var(--muted)}

dl.facts{display:grid;grid-template-columns:max-content 1fr;gap:12px 28px;margin:0;padding:28px;background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:14px}
dl.facts dt{color:var(--muted)}dl.facts dd{margin:0}

details{border-bottom:1px solid var(--line)}
details:first-of-type{border-top:1px solid var(--line)}
summary{cursor:pointer;padding:20px 4px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px;color:#fff}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--cyan);font-size:1.4rem;line-height:1}
details[open] summary::after{content:"\2212"}
details p{margin:0;padding:0 4px 22px;color:var(--muted);max-width:44em}

.closing{text-align:center;background:radial-gradient(700px 360px at 50% 100%,rgba(79,214,230,.2),transparent 70%),var(--deep)}
.closing h2,.closing .sub{margin-inline:auto}
.closing .cta{justify-content:center}
.note{color:var(--muted);margin:22px 0 0;font-size:.95rem}

footer.site{padding:52px 0 32px;background:#040d1b;color:#9fb7cf;font-size:.93rem;border-top:1px solid var(--line)}
footer .cols{display:grid;gap:32px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin-bottom:32px}
footer h4{color:#fff;margin:0 0 10px;font-size:1rem}
footer a{color:#9fb7cf}footer a:hover{color:#fff}
footer ul{list-style:none;margin:0;padding:0}footer li{margin-bottom:6px}
.legal-line{border-top:1px solid var(--line);padding-top:20px;font-size:.85rem}

@media (max-width:820px){
  .menu-btn{display:block}
  nav ul{display:none;position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--deep);border-bottom:1px solid var(--line);padding:10px 24px 18px}
  nav ul.open{display:flex}
  nav li{padding:10px 0}
  .hero{padding:80px 0 70px}section{padding:64px 0}
  .rows li,.split{grid-template-columns:1fr}
  .split{gap:32px}
  dl.facts{grid-template-columns:1fr}dl.facts dt{margin-top:6px}
  .plate img{height:48px}
  .hero-inner{grid-template-columns:1fr}.hero-mark{order:-1}.plate.big img{max-width:180px}
  nav ul{top:84px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.sub-h{font-size:1.4rem;margin:64px 0 24px;max-width:28em}
#approach .note{margin-top:28px;max-width:44em}