:root{
  --bg:#05070d; --panel:rgba(255,255,255,.04); --panel2:rgba(255,255,255,.06);
  --line:rgba(120,170,255,.16); --line2:rgba(120,170,255,.32);
  --text:#dbe7ff; --muted:#93a6c8; --dim:#5f719a;
  --cyan:#52d6ff; --blue:#4f8cff; --green:#34d399; --red:#fb7185; --amber:#fbbf24; --purple:#a78bfa;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:-apple-system,system-ui,"Segoe UI",Roboto,Inter,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:-2;background:
    radial-gradient(900px 500px at 80% -5%, rgba(79,140,255,.18), transparent 60%),
    radial-gradient(800px 600px at 5% 15%, rgba(82,214,255,.12), transparent 60%),
    radial-gradient(700px 700px at 60% 115%, rgba(167,139,250,.10), transparent 60%), var(--bg);}
body::after{content:"";position:fixed;inset:0;z-index:-1;opacity:.4;
  background-image:linear-gradient(rgba(120,170,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.05) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(circle at 50% 22%,#000,transparent 80%)}
a{color:var(--cyan);text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.mono{font-family:var(--mono)}
h1,h2,h3{line-height:1.14;margin:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);border:1px solid var(--line);background:var(--panel);padding:6px 12px;border-radius:999px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green);animation:pulse 1.6s infinite}
@keyframes pulse{50%{opacity:.35}}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;cursor:pointer;padding:13px 22px;border-radius:12px;border:1px solid transparent;transition:.18s}
.btn.primary{background:linear-gradient(135deg,var(--cyan),var(--blue));color:#04121f;box-shadow:0 10px 30px rgba(79,140,255,.35)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(79,140,255,.5)}
.btn.ghost{background:var(--panel);border-color:var(--line2);color:var(--text)}
.btn.ghost:hover{border-color:var(--cyan);background:var(--panel2)}

nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(5,7,13,.72);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;align-items:center;gap:18px;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--text)}
.brand .lk{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--cyan),var(--blue));display:grid;place-items:center;color:#04121f;font-family:var(--mono);font-weight:800;box-shadow:0 0 18px rgba(82,214,255,.5)}
nav .links{display:flex;gap:20px;margin-left:auto;font-size:14px;color:var(--muted)}
nav .links a{color:var(--muted)}nav .links a:hover{color:var(--text)}
nav .links a.on{color:var(--cyan)}
.lang{display:flex;border:1px solid var(--line2);border-radius:9px;overflow:hidden;font-family:var(--mono);font-size:12px}
.lang button{background:transparent;color:var(--muted);border:none;padding:7px 11px;cursor:pointer}
.lang button.on{background:linear-gradient(135deg,var(--cyan),var(--blue));color:#04121f;font-weight:800}
@media(max-width:820px){nav .links{display:none}}

.hero{padding:70px 0 34px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:26px}}
.hero h1{font-size:clamp(38px,7vw,72px);font-weight:850;letter-spacing:-.02em;margin:18px 0 6px}
.hero h1 .grad{background:linear-gradient(120deg,#fff 10%,var(--cyan) 55%,var(--blue));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .tag{font-size:clamp(16px,2.6vw,22px);color:var(--cyan);margin:6px 0 14px;font-weight:600}
.hero p.lead{font-size:17px;color:var(--muted);max-width:560px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero .stats{display:flex;gap:26px;margin-top:30px;flex-wrap:wrap}
.hero .stats b{display:block;font-size:24px;color:#fff;font-family:var(--mono)}
.hero .stats span{font-size:12px;color:var(--dim);letter-spacing:.05em;text-transform:uppercase}
.radar{position:relative;aspect-ratio:1;max-width:380px;margin:0 auto;width:100%}
.radar svg{width:100%;height:100%;overflow:visible}
.sat{animation:float 4.5s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes float{50%{transform:translateY(-7px)}}
.hpulse{transform-box:fill-box;transform-origin:center;animation:hpulse 3.2s ease-out infinite}
@keyframes hpulse{0%{transform:scale(.42);opacity:.7}100%{transform:scale(1.04);opacity:0}}
.hero .caption{margin-top:14px;text-align:center;font-size:13px;color:var(--muted)}

.phero{padding:56px 0 8px;text-align:center}
.phero h1{font-size:clamp(30px,5.5vw,52px);font-weight:850;letter-spacing:-.02em;margin:16px 0 10px}
.phero h1 .grad{background:linear-gradient(120deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.phero p{color:var(--muted);max-width:640px;margin:0 auto;font-size:17px}

.shead{max-width:720px;margin:0 auto 40px;text-align:center}
.shead h2{font-size:clamp(28px,4.4vw,44px);font-weight:820;letter-spacing:-.02em}
.shead p{color:var(--muted);margin-top:12px;font-size:16px}
.sec{padding:56px 0}
.sec-line{height:1px;background:linear-gradient(90deg,transparent,var(--line2),transparent)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px}
.card:hover{border-color:var(--line2)}
.grid{display:grid;gap:16px}.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:820px){.g3{grid-template-columns:1fr 1fr}}@media(max-width:560px){.g3,.g2{grid-template-columns:1fr}}

.analogy{display:flex;gap:16px;align-items:center;background:linear-gradient(135deg,rgba(82,214,255,.08),rgba(167,139,250,.06));border:1px solid var(--line2);border-radius:18px;padding:22px 26px}
.analogy .em{font-size:38px}
.analogy p{margin:0;font-size:17px}

.demo{background:linear-gradient(180deg,rgba(10,14,26,.75),rgba(5,7,13,.4));border:1px solid var(--line);border-radius:22px;overflow:hidden}
.demo-grid{display:grid;grid-template-columns:1.45fr 1fr}
@media(max-width:920px){.demo-grid{grid-template-columns:1fr}}
.scene{position:relative;min-height:440px;user-select:none;touch-action:none;border-right:1px solid var(--line);background:radial-gradient(700px 460px at 50% 60%,rgba(79,140,255,.08),transparent)}
@media(max-width:920px){.scene{border-right:none;border-bottom:1px solid var(--line)}}
.scene svg{width:100%;height:100%;display:block}
.hint{position:absolute;left:16px;top:14px;font-size:12px;color:var(--muted);background:rgba(5,7,13,.6);border:1px solid var(--line);padding:6px 10px;border-radius:8px;pointer-events:none}
.pring{fill:none;stroke-width:2;animation:pring 2.6s ease-out infinite}
@keyframes pring{0%{r:9px;opacity:.75}100%{r:38px;opacity:0}}
.panel{padding:22px;display:flex;flex-direction:column}
.verdict{display:flex;align-items:center;gap:12px;padding:15px;border-radius:14px;border:1px solid var(--line);font-weight:800;font-size:18px;transition:.25s}
.verdict.ok{background:rgba(52,211,153,.12);border-color:rgba(52,211,153,.5);color:var(--green)}
.verdict.no{background:rgba(251,113,133,.12);border-color:rgba(251,113,133,.5);color:var(--red)}
.verdict .ic{width:26px;height:26px;flex:0 0 auto}
.checks{margin:16px 0 6px;display:flex;flex-direction:column;gap:8px}
.chk{display:flex;align-items:center;gap:11px;padding:9px 11px;border-radius:11px;border:1px solid var(--line);background:rgba(255,255,255,.02);transition:.2s}
.chk .ci{width:30px;height:30px;flex:0 0 auto;color:var(--cyan)}
.chk .tx{flex:1}.chk .tx b{display:block;font-size:14px}.chk .tx span{font-size:12px;color:var(--muted)}
.chk .st{font-weight:800;font-size:16px}
.chk.ok{border-color:rgba(52,211,153,.4)}.chk.ok .st{color:var(--green)}.chk.ok .ci{color:var(--green)}
.chk.no{border-color:rgba(251,113,133,.4)}.chk.no .st{color:var(--red)}.chk.no .ci{color:var(--red)}
.keyrow{margin-top:12px}
.keyrow .lbl{font-size:12px;color:var(--muted)}
.keyrow .big{font-family:var(--mono);font-size:26px;color:var(--cyan)}
.keybar{height:8px;border-radius:4px;background:rgba(255,255,255,.08);overflow:hidden;margin:6px 0 4px}
.keybar>i{display:block;height:100%;width:100%;background:linear-gradient(90deg,var(--cyan),var(--blue))}
.kmeta{display:flex;justify-content:space-between;font-family:var(--mono);font-size:12px;color:var(--muted)}
.ctrl{display:flex;align-items:center;gap:12px;margin-top:16px;flex-wrap:wrap}
.ctrl label{font-size:12px;color:var(--muted)}
input[type=range]{accent-color:var(--cyan);flex:1;min-width:110px}

.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:720px){.steps3{grid-template-columns:1fr}}
.s3{text-align:center;padding:26px 20px}
.s3 .ic{width:52px;height:52px;color:var(--cyan);margin:0 auto 12px}
.s3 h4{font-size:17px;margin:0 0 6px}.s3 p{margin:0;color:var(--muted);font-size:14px}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:820px){.steps{grid-template-columns:1fr 1fr}}@media(max-width:520px){.steps{grid-template-columns:1fr}}
.stepc{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px}
.stepc .n{font-family:var(--mono);font-weight:800;color:#04121f;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:linear-gradient(135deg,var(--cyan),var(--blue));font-size:13px}
.stepc h4{font-size:14.5px;margin:10px 0 4px}.stepc p{font-size:13px;color:var(--muted);margin:0}

.cmp{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:640px){.cmp{grid-template-columns:1fr}}
.cmp .card h3{font-size:17px;margin-bottom:12px}
.cmp ul{margin:0;padding:0;list-style:none;font-size:14px}
.cmp li{padding:8px 0 8px 26px;position:relative;color:var(--muted);border-top:1px solid var(--line)}
.cmp li:first-child{border-top:none}.cmp li::before{position:absolute;left:0;top:8px}
.cmp .bad li::before{content:"✕";color:var(--red)}.cmp .good li::before{content:"✓";color:var(--green)}
.cmp .good{border-color:rgba(52,211,153,.35)}

.uc .ico{width:38px;height:38px;color:var(--cyan);margin-bottom:12px}.uc h4{font-size:16px;margin:0 0 6px}.uc p{margin:0;font-size:13.5px;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.chip{font-family:var(--mono);font-size:13px;color:var(--text);border:1px solid var(--line);background:var(--panel);padding:8px 14px;border-radius:10px}.chip b{color:var(--cyan)}
.std .b{font-family:var(--mono);font-size:12px;color:var(--cyan);border:1px solid var(--line);padding:5px 9px;border-radius:8px}

/* tech page */
.layer{display:flex;gap:14px;align-items:flex-start}
.layer .num{font-family:var(--mono);font-weight:800;font-size:15px;color:#04121f;width:34px;height:34px;flex:0 0 auto;border-radius:9px;display:grid;place-items:center;background:linear-gradient(135deg,var(--cyan),var(--blue))}
.layer h4{font-size:15px;margin:4px 0 3px}.layer p{margin:0;font-size:13.5px;color:var(--muted)}
.codeblock{font-family:var(--mono);font-size:13px;background:rgba(0,0,0,.3);border:1px solid var(--line);border-radius:10px;padding:16px;color:var(--muted);overflow-x:auto;line-height:1.7}
.codeblock b{color:var(--cyan);font-weight:600}
.codeblock .g{color:var(--green)}
.codeblock .d{color:var(--dim)}

/* story timeline */
.timeline{max-width:760px;margin:0 auto;position:relative;padding-left:36px}
.timeline::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--cyan),var(--blue),transparent)}
.tl{position:relative;margin:0 0 26px}
.tl .dot{position:absolute;left:-35px;top:2px;width:20px;height:20px;border-radius:50%;background:var(--bg);border:2px solid var(--cyan);display:grid;place-items:center}
.tl .dot::after{content:"";width:7px;height:7px;border-radius:50%;background:var(--cyan)}
.tl .yr{font-family:var(--mono);font-size:12px;color:var(--cyan);letter-spacing:.08em}
.tl h4{font-size:18px;margin:3px 0 6px}
.tl p{margin:0;color:var(--muted);font-size:15px}

/* about */
.team{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.tm{text-align:center;padding:22px 14px}
.tm .av{width:56px;height:56px;border-radius:50%;margin:0 auto 12px;display:grid;place-items:center;font-family:var(--mono);font-weight:800;font-size:17px;color:#04121f;background:linear-gradient(135deg,var(--cyan),var(--blue))}
.tm b{display:block;font-size:15px}.tm span{font-size:12.5px;color:var(--muted)}
.val{display:flex;gap:13px;align-items:flex-start}
.val .ic{width:26px;height:26px;color:var(--cyan);flex:0 0 auto;margin-top:2px}
.val h4{margin:0 0 4px;font-size:15px}.val p{margin:0;color:var(--muted);font-size:14px}

footer{border-top:1px solid var(--line);padding:40px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.reveal{opacity:0;transform:translateY(24px);transition:.7s cubic-bezier(.2,.7,.2,1)}.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.sat,.pring,.hpulse{animation:none}}

/* --- mobile nav hamburger (added) --- */
.navtoggle{display:none;background:transparent;border:1px solid var(--line2);border-radius:9px;width:40px;height:34px;cursor:pointer;color:var(--text);align-items:center;justify-content:center;padding:0}
.navtoggle svg{width:20px;height:20px}
@media(max-width:820px){
  .navtoggle{display:inline-flex}
  nav .wrap{gap:12px}
  nav .wrap .brand{margin-right:auto}
  nav .links{display:flex;position:absolute;left:0;right:0;top:62px;flex-direction:column;gap:0;margin:0;
    background:rgba(5,7,13,.98);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .28s ease}
  nav .links a{padding:14px 22px;font-size:16px;border-top:1px solid var(--line)}
  nav.open .links{max-height:80vh;overflow:auto}
}