:root{
  --bg:#0b1020;
  --bg-soft:#11172d;
  --card:#151c36;
  --text:#e7e9f1;
  --muted:#a7acc9;
  --accent:#6ea8ff;
  --border:rgba(255,255,255,.08);
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,sans-serif;
  background:radial-gradient(1200px 600px at 20% -10%,#18204a 0%,#0b1020 55%);
  color:var(--text);
}

a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:auto;padding:0 24px}

.header{
  position:sticky;top:0;
  background:rgba(11,16,32,.75);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}

.brand{display:flex;align-items:center;gap:10px;font-weight:600}
.brand-logo{width:28px;height:28px;border-radius:8px;object-fit:cover}
.brand-logo.sm{width:22px;height:22px}

.nav{display:flex;gap:18px;align-items:center}

.btn{
  display:inline-block;
  padding:12px 18px;
  border-radius:12px;
  font-weight:600;
}
.btn-primary{background:var(--accent);color:#081020}
.btn-outline{border:1px solid var(--border)}

.hero{padding:80px 0}
.hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:48px}
.pill{
  display:inline-block;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(110,168,255,.15);
  color:#cfe0ff;
  font-size:13px;
}

.hero h1{font-size:48px;line-height:1.05;margin:18px 0}
.hero-sub{font-size:18px;color:var(--muted);max-width:520px}
.hero-note{margin-top:10px;color:var(--muted);font-size:14px}

.example-card{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--border);
  border-radius:18px;
  padding:22px;
}

.chat{margin:16px 0}
.bubble{
  padding:10px 14px;
  border-radius:14px;
  margin-bottom:8px;
  max-width:85%;
}
.user{background:#1c2550}
.bot{background:#1a3a2e}

.tags{display:flex;gap:8px;flex-wrap:wrap}
.tags span{
  font-size:12px;
  padding:4px 10px;
  border-radius:999px;
  border:1px solid var(--border);
  color:var(--muted);
}

.small-note{font-size:13px;color:var(--muted);margin-top:12px}

.section{padding:72px 0}
.muted{background:var(--bg-soft)}

.problem-list li{margin-bottom:10px}
.closing-line{margin-top:16px;color:var(--muted)}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:16px;
  padding:22px;
}

.form-wrap{max-width:520px}
form{display:grid;gap:14px;margin-top:20px}
input,textarea{
  background:#0b1020;
  border:1px solid var(--border);
  border-radius:10px;
  padding:12px;
  color:var(--text);
}
.form-status{margin-top:12px;font-size:14px}

.footer{
  border-top:1px solid var(--border);
  padding:28px 0;
}
.footer-inner{display:flex;justify-content:space-between;align-items:center}

@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  .hero h1{font-size:38px}
}