:root{
  --ink:#0b1f3a;
  --ink-soft:#5b6b80;
  --paper:#ffffff;
  --bg:#f6f8fb;
  --line:#e4e9f0;
  --accent:#3a7d44;
  --accent-soft:#eaf3ec;
  --radius:18px;
  --max:1080px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter",-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.65;
  font-size:16px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:40px;height:40px;object-fit:contain}
.brand strong{font-size:16px;letter-spacing:.01em}
.brand small{display:block;color:var(--ink-soft);font-size:11px;font-weight:500}
.nav{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:500}
.nav a{color:var(--ink-soft)}
.nav a:hover{color:var(--ink)}
.nav-cta{
  border:1px solid var(--ink);
  border-radius:10px;
  padding:9px 16px;
  color:var(--ink)!important;
  font-weight:600;
}
.nav-cta:hover{background:var(--ink);color:var(--paper)!important}
.menu-toggle{
  display:none;background:transparent;border:1px solid var(--line);
  border-radius:10px;padding:8px 12px;font-size:18px;color:var(--ink)
}

/* ---------- Hero ---------- */
.hero{padding:64px 0 56px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.eyebrow{
  color:var(--accent);font-weight:700;font-size:13px;
  letter-spacing:.06em;text-transform:uppercase;margin:0 0 14px;
}
.hero h1{
  font-size:clamp(34px,4.6vw,52px);
  line-height:1.12;margin:0 0 18px;
  letter-spacing:-.01em;font-weight:700;
}
.hero h1 span{color:var(--accent)}
.lead{font-size:18px;color:var(--ink-soft);max-width:520px;margin:0 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;border-radius:12px;padding:0 24px;
  font-weight:600;font-size:15px;border:1px solid transparent;
}
.btn.primary{background:var(--ink);color:var(--paper)}
.btn.primary:hover{background:#16335c}
.btn.ghost{border:1px solid var(--line);color:var(--ink)}
.btn.ghost:hover{border-color:var(--ink)}
.hero-product{
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--bg);padding:28px;
}
.hero-product img{border-radius:10px}

/* ---------- Sections ---------- */
.section{padding:72px 0}
.section.alt{background:var(--bg)}
.section-title{max-width:680px;margin:0 0 40px}
.section-title.centered{text-align:center;margin-inline:auto}
.section-title h2{
  font-size:clamp(28px,3.4vw,40px);
  line-height:1.18;margin:0 0 14px;font-weight:700;letter-spacing:-.01em;
}
.section-title p{color:var(--ink-soft);margin:0;font-size:17px}

/* ---------- Platform / three layers ---------- */
.intro-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.intro-grid article{
  padding:28px;border-radius:var(--radius);
  background:var(--paper);border:1px solid var(--line);
}
.intro-grid h3{font-size:19px;margin:0 0 10px;font-weight:700}
.intro-grid p{color:var(--ink-soft);margin:0;font-size:15px}

/* ---------- Security split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split h2{font-size:clamp(28px,3.4vw,40px);line-height:1.18;margin:0 0 16px;font-weight:700;letter-spacing:-.01em}
.split p{color:var(--ink-soft);font-size:16px;margin:0 0 20px}
.check-list{padding:0;margin:0;list-style:none;display:grid;gap:12px}
.check-list li{
  padding-left:28px;position:relative;font-size:15px;color:var(--ink);
}
.check-list li:before{
  content:"";position:absolute;left:0;top:6px;width:14px;height:14px;
  border-radius:50%;background:var(--accent-soft);
  border:1.5px solid var(--accent);
}

.dashboard-card{
  border:1px solid var(--line);background:var(--paper);
  border-radius:var(--radius);padding:20px;
}
.dash-head{display:flex;gap:6px;margin-bottom:14px}
.dash-head span{width:10px;height:10px;border-radius:50%;background:var(--line)}
.search-box{
  border:1px solid var(--line);background:var(--bg);
  border-radius:10px;padding:14px;margin-bottom:14px;font-size:14px;
}
.search-box strong{color:var(--accent)}
.map-sim{
  height:240px;position:relative;border-radius:12px;overflow:hidden;
  background:var(--bg);border:1px solid var(--line);
}
.map-sim svg{position:absolute;inset:0}
.map-sim path{fill:none;stroke:var(--accent);stroke-width:2.5;stroke-dasharray:6 8;opacity:.5}
.node{
  position:absolute;background:var(--paper);border:1px solid var(--line);
  border-radius:999px;padding:6px 10px;font-size:12px;font-weight:600;color:var(--ink-soft);
}
.node.active{background:var(--accent);color:var(--paper);border-color:var(--accent)}
.n1{left:24px;bottom:32px}
.n2{left:160px;top:96px}
.n3{right:60px;top:48px}
.n4{right:24px;bottom:48px}
.event-line{margin:14px 2px 0;color:var(--ink-soft);font-size:13px}

/* ---------- Disaster mode ---------- */
.mesh-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:32px;align-items:center;margin-top:36px}
.phone-card{
  background:var(--ink);color:var(--paper);
  border-radius:24px;padding:28px;
}
.phone-top{width:60px;height:5px;background:rgba(255,255,255,.25);border-radius:999px;margin:0 auto 32px}
.phone-card h3{color:#9bd6a8;font-size:18px;font-weight:700;margin:0 0 12px}
.phone-card p{font-size:20px;line-height:1.3;margin:0 0 12px}
.phone-card span{color:#9bd6a8;font-weight:600;font-size:13px}
.mesh-copy{display:grid;gap:12px}
.mesh-line{
  display:flex;gap:16px;align-items:center;background:var(--paper);
  border-radius:14px;padding:18px;border:1px solid var(--line);
}
.mesh-line b{
  display:grid;place-items:center;width:36px;height:36px;flex:none;
  border-radius:10px;background:var(--accent-soft);color:var(--accent);
  font-size:13px;font-weight:700;
}
.mesh-line span{font-size:15px;color:var(--ink)}

/* ---------- Versions ---------- */
.version-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.version-grid article{
  padding:24px;border-radius:var(--radius);
  background:var(--paper);border:1px solid var(--line);
}
.version-grid span{color:var(--accent);font-weight:700;font-size:13px}
.version-grid h3{font-size:17px;margin:10px 0 8px;font-weight:700}
.version-grid p{color:var(--ink-soft);margin:0;font-size:14px}

/* ---------- Product / hardware ---------- */
.product-section{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.product-copy h2{font-size:clamp(28px,3.4vw,40px);line-height:1.18;margin:0 0 14px;font-weight:700;letter-spacing:-.01em}
.product-copy p{color:var(--ink-soft);font-size:16px;margin:0}
.specs{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.specs span{
  background:var(--bg);border:1px solid var(--line);color:var(--ink);
  border-radius:999px;padding:8px 14px;font-size:13px;font-weight:600;
}
.product-img{
  border-radius:var(--radius);border:1px solid var(--line);
  background:var(--bg);padding:24px;
}

/* ---------- Investors ---------- */
.record-badge{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  margin-top:24px;padding:18px 20px;
  background:var(--accent-soft);border:1px solid var(--accent);
  border-radius:14px;
}
.record-badge strong{
  font-size:26px;font-weight:800;color:var(--accent);
  white-space:nowrap;line-height:1;
}
.record-badge span{
  font-size:14px;color:var(--ink);line-height:1.5;flex:1;min-width:200px;
}
.investor-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.metric-grid div{
  border:1px solid var(--line);border-radius:14px;padding:20px;background:var(--paper)
}
.metric-grid strong{display:block;font-size:28px;color:var(--ink);font-weight:700}
.metric-grid span{color:var(--ink-soft);font-size:13px}

/* ---------- Supporters ---------- */
.supporter-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.supporter-grid img{
  height:90px;width:100%;object-fit:contain;background:var(--paper);
  border:1px solid var(--line);border-radius:14px;padding:18px;
}

/* ---------- Contact ---------- */
.contact-card{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  background:var(--bg);border:1px solid var(--line);
  border-radius:var(--radius);padding:40px;
}
.contact-card h2{
  max-width:680px;margin:0;font-size:clamp(26px,3vw,34px);
  line-height:1.2;font-weight:700;letter-spacing:-.01em;
}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);padding:24px 0;color:var(--ink-soft)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:14px}
.footer img{width:32px;height:32px;object-fit:contain}

/* ---------- Responsive ---------- */
@media (max-width:920px){
  .site-header{padding:12px 20px}
  .menu-toggle{display:block}
  .nav{
    position:absolute;top:62px;left:20px;right:20px;display:none;
    flex-direction:column;align-items:stretch;gap:14px;
    background:var(--paper);border:1px solid var(--line);
    border-radius:14px;padding:18px;
  }
  .nav.open{display:flex}
  .nav-cta{text-align:center}
  .hero-grid,.split,.mesh-grid,.product-section,.investor-grid{grid-template-columns:1fr}
  .hero-product{order:-1}
  .intro-grid,.version-grid{grid-template-columns:1fr}
  .supporter-grid{grid-template-columns:repeat(2,1fr)}
  .contact-card,.footer-inner{flex-direction:column;text-align:center}
  .brand small{display:none}
}

@media (max-width:560px){
  .container{width:min(100% - 28px,1080px)}
  .hero{padding:32px 0 40px}
  .hero h1{font-size:32px}
  .lead{font-size:16px}
  .btn{width:100%}
  .section{padding:48px 0}
  .metric-grid{grid-template-columns:1fr}
  .supporter-grid{grid-template-columns:1fr}
  .mesh-line{padding:14px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
}

/* Visible keyboard focus */
a:focus-visible,button:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;
}