:root{
  --bg:#0a0e1a;
  --bg-2:#10162a;
  --panel:#141b30;
  --panel-2:#1a2238;
  --border:#23304f;
  --text:#e7ecf6;
  --muted:#93a0bd;
  --brand:#a06bff;
  --brand-2:#7c3aed;
  --accent:#22d3bf;
  --warn:#ffce5b;
  --danger:#ff6b8a;
  --radius:14px;
  --maxw:1120px;
  --mono:"SF Mono",ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  background:
    radial-gradient(1200px 600px at 80% -10%,rgba(124,58,237,.18),transparent 60%),
    radial-gradient(1000px 500px at -10% 10%,rgba(160,107,255,.16),transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* Nav */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(10,14,26,.72);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.2px}
.brand .logo{width:28px;height:28px;border-radius:8px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  display:grid;place-items:center;font-size:14px;color:#fff;font-weight:800}
.logo-img{height:30px;width:auto;display:block}
footer .logo-img{height:26px}
.nav-links{display:flex;gap:18px;margin-left:8px;flex-wrap:wrap}
.nav-links a{color:var(--muted);font-size:14px;font-weight:500;transition:color .15s}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-cta{margin-left:auto;display:flex;gap:10px;align-items:center}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);
  background:var(--panel);color:var(--text);padding:10px 16px;border-radius:10px;
  font-size:14px;font-weight:600;cursor:pointer;transition:.15s;white-space:nowrap}
.btn:hover{border-color:var(--brand);transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));border:none;color:#fff}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{background:transparent}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* Hero */
.hero{padding:88px 0 64px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--accent);
  background:rgba(34,211,191,.08);border:1px solid rgba(34,211,191,.25);
  padding:6px 14px;border-radius:999px;margin-bottom:22px;font-weight:600}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.05;margin:0 0 18px;letter-spacing:-1px}
.hero h1 .grad{background:linear-gradient(120deg,var(--brand),var(--accent));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.grad,.grad-text{background:linear-gradient(120deg,var(--brand),var(--accent));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:18px;color:var(--muted);max-width:680px;margin:0 auto 30px}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* Sections */
section.block{padding:56px 0}
.section-head{margin-bottom:28px}
.section-head h2{font-size:28px;margin:0 0 8px;letter-spacing:-.5px}
.section-head p{color:var(--muted);margin:0;max-width:620px}

/* Cards grid */
.grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:860px){.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--border);border-radius:var(--radius);padding:22px;transition:.18s}
.card:hover{border-color:var(--brand);transform:translateY(-2px)}
.card .ico{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
  background:rgba(160,107,255,.12);font-size:20px;margin-bottom:14px}
.card .cardimg{width:100%;height:152px;object-fit:cover;border-radius:10px;margin-bottom:14px;
  border:1px solid var(--border);filter:saturate(1.05)}
.hero-img{width:100%;max-width:760px;margin:14px auto 0;border-radius:16px;border:1px solid var(--border);
  display:block;box-shadow:0 24px 60px rgba(124,58,237,.22)}
.card h3{margin:0 0 8px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:14px}

/* Pill / tags */
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:999px;border:1px solid var(--border)}
.tag.live{color:var(--accent);background:rgba(34,211,191,.08);border-color:rgba(34,211,191,.3)}
.tag.road{color:var(--warn);background:rgba(255,206,91,.07);border-color:rgba(255,206,91,.3)}
.tag.sim{color:var(--brand);background:rgba(160,107,255,.08);border-color:rgba(160,107,255,.3)}
.tag.near{color:#bfe9ff;background:rgba(91,140,255,.08);border-color:rgba(120,160,255,.35)}
.bar{height:6px;border-radius:4px;background:var(--bg-2);overflow:hidden;margin-top:8px;max-width:240px;border:1px solid var(--border)}
.bar>i{display:block;height:100%;border-radius:4px;background:linear-gradient(90deg,var(--brand),var(--accent))}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 0 rgba(34,211,191,.5);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(34,211,191,.5)}70%{box-shadow:0 0 0 8px rgba(34,211,191,0)}100%{box-shadow:0 0 0 0 rgba(34,211,191,0)}}

/* Panels / demo */
.panel{background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.panel h3{margin:0 0 6px}
.panel .muted{color:var(--muted);font-size:14px}
label.fld{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px;font-weight:600}
input.in,textarea.in,select.in{width:100%;background:var(--bg-2);border:1px solid var(--border);
  color:var(--text);border-radius:10px;padding:11px 13px;font-size:14px;font-family:inherit}
textarea.in{resize:vertical;min-height:80px}
input.in:focus,textarea.in:focus{outline:none;border-color:var(--brand)}
.mono{font-family:var(--mono);font-size:12.5px}
.code{background:#070b16;border:1px solid var(--border);border-radius:10px;padding:14px;
  font-family:var(--mono);font-size:12.5px;color:#c9d6f5;overflow-x:auto;white-space:pre-wrap;word-break:break-all}
.kv{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px solid var(--border);font-size:14px}
.kv:last-child{border-bottom:none}
.kv .k{color:var(--muted)}
.kv .v{font-family:var(--mono);font-size:12.5px;text-align:right}

/* Steps / lifecycle */
.steps{display:flex;flex-direction:column;gap:0}
.step{display:flex;gap:14px;padding:12px 0;position:relative}
.step .bullet{width:26px;height:26px;border-radius:50%;border:2px solid var(--border);
  display:grid;place-items:center;font-size:13px;flex-shrink:0;color:var(--muted);transition:.2s}
.step.done .bullet{border-color:var(--accent);color:var(--accent);background:rgba(34,211,191,.1)}
.step.active .bullet{border-color:var(--brand);color:var(--brand)}
.step .body strong{font-size:14px}
.step .body p{margin:2px 0 0;color:var(--muted);font-size:13px}

/* Log */
.log{background:#060a13;border:1px solid var(--border);border-radius:10px;padding:12px;
  font-family:var(--mono);font-size:12px;max-height:240px;overflow-y:auto}
.log .line{padding:3px 0;color:#9fb0d4}
.log .line .t{color:#5b7099}
.log .line.ok{color:var(--accent)}
.log .line.warn{color:var(--warn)}

/* Status table */
.statrow{display:grid;grid-template-columns:1fr auto auto;gap:14px;align-items:center;
  padding:14px 0;border-bottom:1px solid var(--border)}
.statrow:last-child{border-bottom:none}
.statrow .name{font-weight:600}
.statrow .sub{color:var(--muted);font-size:13px}

/* Footer */
footer{border-top:1px solid var(--border);margin-top:40px;padding:36px 0;color:var(--muted);font-size:13px}
.foot-grid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.foot-links{display:flex;gap:28px;flex-wrap:wrap}
.foot-links a{color:var(--muted)}.foot-links a:hover{color:var(--text)}

.note{font-size:12.5px;color:var(--muted);background:rgba(124,58,237,.06);
  border:1px solid rgba(124,58,237,.25);border-radius:10px;padding:10px 13px;margin-top:14px}
/* FAQ accordions */
.faq{display:flex;flex-direction:column;gap:10px;max-width:860px;margin:0 auto}
details.qa{background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--border);
  border-radius:12px;padding:0 18px;transition:border-color .15s}
details.qa[open]{border-color:var(--brand)}
details.qa summary{list-style:none;cursor:pointer;padding:16px 0;font-weight:600;font-size:15.5px;
  display:flex;justify-content:space-between;align-items:center;gap:12px}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{content:"+";color:var(--accent);font-size:20px;font-weight:700;flex-shrink:0}
details.qa[open] summary::after{content:"\2212"}
details.qa .ans{padding:0 0 18px;color:var(--muted);font-size:14.5px;line-height:1.6}
details.qa .ans .mono{color:#c9d6f5}
.faq-cat{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);
  margin:26px auto 4px;max-width:860px}
/* References */
.reflist{max-width:920px;margin:0 auto}
.refitem{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--border)}
.refitem:last-child{border-bottom:none}
.refitem .num{color:var(--accent);font-family:var(--mono);font-size:13px;flex-shrink:0;width:30px}
.refitem .body{flex:1}
.refitem .body a{font-weight:600;color:var(--text)}
.refitem .body a:hover{color:var(--accent)}
.refitem .body .src{display:block;color:var(--muted);font-size:13px;margin-top:2px}
.refitem .body .url{font-family:var(--mono);font-size:11.5px;color:#5b7099;word-break:break-all}
.split{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:860px){.split{grid-template-columns:1fr}}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

/* ============ Mobile optimization ============ */
@media(max-width:820px){
  .container{padding:0 18px}
  .nav-inner{height:auto;flex-wrap:wrap;gap:10px;padding:11px 0}
  .nav-links{order:3;width:100%;flex-wrap:nowrap;overflow-x:auto;gap:18px;
    padding:4px 0 2px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-links a{white-space:nowrap;font-size:14.5px;padding:2px 0}
  .nav-cta{margin-left:auto;gap:8px}
  .nav-cta .btn{padding:8px 12px;font-size:13px}
  .hero{padding:44px 0 34px}
  section.block{padding:38px 0}
  .hero p.sub{font-size:16.5px}
  .section-head h2{font-size:23px}
  .hero-cta .btn{flex:1 1 auto;justify-content:center}
  .foot-grid{flex-direction:column;gap:18px}
  .foot-links{gap:16px 20px}
  .statrow{grid-template-columns:1fr auto;row-gap:4px}
  .kv .v{word-break:break-word}
}
@media(max-width:480px){
  .nav-cta .btn-ghost{display:none}
  .brand .logo,.logo-img{height:24px}
  .hero h1{letter-spacing:-.5px}
  .panel{padding:18px}
  .code{font-size:11.5px;padding:12px}
  .grad-text,[class*="grad-text"]{font-size:28px!important}
  .metric-big{font-size:28px}
}
/* prevent any horizontal overflow site-wide (clip keeps sticky nav working) */
html,body{overflow-x:clip}
img{max-width:100%;height:auto}