:root{
  --indigo:#5B6CFF; --violet:#9D4EFF; --ink:#14151A; --muted:#6b7280;
  --bg:#ffffff; --soft:#f6f7fb; --line:#e9ebf2; --radius:18px;
  --grad:linear-gradient(135deg,var(--indigo),var(--violet));
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.6; -webkit-font-smoothing:antialiased;
}
a{color:var(--indigo); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1040px; margin:0 auto; padding:0 24px}
.muted{color:var(--muted)}

/* Header */
header{position:sticky; top:0; z-index:10; backdrop-filter:saturate(160%) blur(12px);
  background:rgba(255,255,255,.8); border-bottom:1px solid var(--line)}
.nav{display:flex; align-items:center; justify-content:space-between; height:64px}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; font-size:19px}
.brand img{width:30px; height:30px; border-radius:8px}
.brand .u{color:var(--ink)} .brand .seen{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex; gap:26px; font-size:15px; font-weight:500}
.nav-links a{color:var(--ink)}

/* Hero */
.hero{text-align:center; padding:90px 0 70px; background:
  radial-gradient(60% 60% at 50% 0%, rgba(124,108,255,.10), transparent 70%)}
.hero img.icon{width:128px; height:128px; border-radius:28px; box-shadow:0 20px 50px rgba(91,108,255,.28)}
.hero h1{font-size:clamp(40px,7vw,68px); font-weight:800; letter-spacing:-.02em; margin:26px 0 8px}
.hero h1 .seen{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:clamp(18px,2.4vw,23px); color:var(--muted); max-width:680px; margin:0 auto 30px}
.badge{display:inline-flex; align-items:center; gap:8px; padding:11px 20px; border-radius:999px;
  background:var(--grad); color:#fff; font-weight:600; font-size:15px; box-shadow:0 10px 24px rgba(124,108,255,.32)}
.pill{display:inline-block; margin-top:18px; font-size:13px; color:var(--muted)}

/* Sections */
section{padding:64px 0}
h2{font-size:clamp(26px,3.4vw,36px); font-weight:800; letter-spacing:-.01em; text-align:center; margin-bottom:8px}
.lead{text-align:center; color:var(--muted); max-width:640px; margin:0 auto 40px; font-size:17px}

/* Feature grid */
.grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:18px}
.card{background:var(--soft); border:1px solid var(--line); border-radius:var(--radius); padding:24px}
.card .ic{width:44px;height:44px;border-radius:12px;background:var(--grad);display:flex;align-items:center;
  justify-content:center;color:#fff;font-size:22px;margin-bottom:14px}
.card h3{font-size:18px; margin-bottom:6px}
.card p{color:var(--muted); font-size:15px}

/* Privacy band */
.band{background:var(--ink); color:#fff; border-radius:28px; padding:54px 40px; text-align:center; margin:0 auto}
.band h2{color:#fff}
.band .lead{color:#c7c9d6}
.guards{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:16px; margin-top:8px; text-align:left}
.guard{background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.1); border-radius:14px; padding:18px}
.guard b{display:block; margin-bottom:4px}
.guard span{color:#b9bcce; font-size:14px}

/* Use cases */
.cases{display:flex; flex-wrap:wrap; gap:12px; justify-content:center}
.chip{background:var(--soft); border:1px solid var(--line); border-radius:999px; padding:10px 18px; font-weight:500}

/* Footer */
footer{border-top:1px solid var(--line); padding:40px 0; color:var(--muted); font-size:14px}
.foot{display:flex; justify-content:space-between; flex-wrap:wrap; gap:16px; align-items:center}
.foot a{color:var(--muted); margin-left:18px}

/* Doc pages */
.doc{max-width:760px; padding:60px 24px}
.doc h1{font-size:38px; font-weight:800; letter-spacing:-.02em; margin-bottom:6px}
.doc h2{text-align:left; font-size:22px; margin:34px 0 10px}
.doc p,.doc li{color:#2a2c36; margin-bottom:12px}
.doc ul{padding-left:22px}
.doc .upd{color:var(--muted); margin-bottom:30px}
.callout{background:var(--soft); border:1px solid var(--line); border-left:4px solid var(--indigo);
  border-radius:12px; padding:16px 18px; margin:18px 0}
/* Before / after sliders */
.demos{display:grid; grid-template-columns:repeat(auto-fit,minmax(330px,1fr)); gap:26px; margin-top:10px}
.ba{position:relative; border-radius:16px; overflow:hidden; user-select:none; touch-action:none;
  box-shadow:0 16px 44px rgba(20,21,26,.13); aspect-ratio:900/560; background:#eef0f6; --p:50%}
.ba img{position:absolute; inset:0; width:100%; height:100%; display:block; pointer-events:none}
.ba .after{z-index:1}
.ba .before{z-index:2; clip-path:inset(0 calc(100% - var(--p)) 0 0)}
.ba .handle{position:absolute; top:0; bottom:0; left:var(--p); width:2px; background:#fff; z-index:3;
  transform:translateX(-1px); box-shadow:0 0 0 1px rgba(0,0,0,.05)}
.ba .knob{position:absolute; top:50%; left:var(--p); transform:translate(-50%,-50%); width:44px; height:44px;
  border-radius:999px; background:#fff; box-shadow:0 6px 18px rgba(20,21,26,.25); display:flex; align-items:center;
  justify-content:center; color:#5B6CFF; font-weight:800; z-index:4; cursor:ew-resize}
.ba .tag{position:absolute; top:12px; z-index:5; font-size:12px; font-weight:700; padding:5px 11px; border-radius:999px; color:#fff}
.ba .tag.b{left:12px; background:rgba(20,21,26,.55)}
.ba .tag.a{right:12px; background:var(--grad)}
.hint{text-align:center; color:var(--muted); font-size:14px; margin-top:16px}
@media(max-width:640px){ .nav-links{display:none} }