:root{
  --bg:#0b1020; --bg2:#111831; --ink:#0f172a; --muted:#64748b; --line:#e2e8f0; --card:#fff;
  --brand:#6366f1; --brand2:#22d3ee; --ok:#10b981; --warn:#f59e0b; --bad:#ef4444;
  --radius:14px; --shadow:0 10px 30px -12px rgba(15,23,42,.25);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
*{box-sizing:border-box} html,body{margin:0} body{color:var(--ink);background:#f8fafc;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none} a:hover{text-decoration:underline}
.container{max-width:1160px;margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;border-radius:10px;padding:11px 18px;font-weight:600;font-size:15px;cursor:pointer;transition:.15s;text-decoration:none!important;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--brand),#8b5cf6);color:#fff;box-shadow:0 8px 20px -8px rgba(99,102,241,.7)}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.05)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.18)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-light{background:#fff;color:var(--ink);border:1px solid var(--line)} .btn-light:hover{background:#f1f5f9}
.btn-danger{background:#fff;color:var(--bad);border:1px solid #fecaca}
.btn-sm{padding:7px 12px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(11,16,32,.82);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav .container{display:flex;align-items:center;height:64px;gap:28px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:19px;letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo-mark{width:30px;height:30px;border-radius:9px;background:conic-gradient(from 210deg,var(--brand),var(--brand2),#a78bfa,var(--brand));display:grid;place-items:center;box-shadow:0 0 0 1px rgba(255,255,255,.2) inset}
.logo-mark:after{content:"";width:12px;height:12px;border:2px solid #fff;border-radius:3px;transform:rotate(45deg)}
.nav-links{display:flex;gap:22px;margin-left:12px} .nav-links a{color:#cbd5e1;font-size:14.5px;font-weight:500} .nav-links a:hover{color:#fff;text-decoration:none}
.nav-cta{margin-left:auto;display:flex;gap:10px;align-items:center}
.nav-cta a.link{color:#cbd5e1;font-weight:500;font-size:14.5px}
/* hero */
.hero{background:radial-gradient(1200px 600px at 80% -10%,rgba(99,102,241,.35),transparent 60%),radial-gradient(900px 500px at -10% 30%,rgba(34,211,238,.18),transparent 60%),var(--bg);color:#fff;padding:72px 0 90px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:48px;align-items:start}
.hero-copy{padding-top:56px;position:sticky;top:110px}
.eyebrow{display:inline-flex;gap:8px;align-items:center;font-size:13px;font-weight:600;color:#c7d2fe;background:rgba(99,102,241,.16);border:1px solid rgba(129,140,248,.35);padding:6px 12px;border-radius:999px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(16,185,129,.25)}
.hero h1{font-size:54px;line-height:1.05;letter-spacing:-.035em;margin:18px 0 18px;font-weight:800}
.grad{background:linear-gradient(90deg,#a5b4fc,#67e8f9);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18.5px;color:#cbd5e1;max-width:520px;margin:0 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-stats{display:flex;gap:30px;margin-top:38px;color:#94a3b8;font-size:13.5px}
.hero-stats b{display:block;color:#fff;font-size:22px;letter-spacing:-.02em}
.demo-frame{background:#fff;border-radius:18px;box-shadow:0 40px 80px -30px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.08);overflow:hidden}
.demo-bar{display:flex;align-items:center;gap:6px;padding:10px 14px;background:#f1f5f9;border-bottom:1px solid var(--line);font-size:12.5px;color:var(--muted)}
.demo-bar i{width:10px;height:10px;border-radius:50%;background:#e2e8f0;display:inline-block} .demo-bar i:nth-child(1){background:#fca5a5}.demo-bar i:nth-child(2){background:#fcd34d}.demo-bar i:nth-child(3){background:#86efac}
.demo-bar span{margin-left:10px;background:#fff;border:1px solid var(--line);border-radius:6px;padding:2px 10px;flex:1;max-width:320px}
.demo-hint{color:#94a3b8;font-size:13px;margin-top:12px;text-align:center}
.demo-hint a{color:#a5b4fc}
/* sections */
section.block{padding:88px 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 52px}
.section-head .kicker{color:var(--brand);font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.section-head h2{font-size:38px;letter-spacing:-.03em;margin:8px 0 12px;line-height:1.15}
.section-head p{color:var(--muted);font-size:17px;margin:0}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s}
.feature:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.feature .ic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;font-size:20px;background:linear-gradient(135deg,#eef2ff,#ecfeff);margin-bottom:14px}
.feature h3{margin:0 0 6px;font-size:17px} .feature p{margin:0;color:var(--muted);font-size:14.5px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:s}
.step{position:relative;padding:28px;border-radius:var(--radius);background:linear-gradient(180deg,#fff,#f8fafc);border:1px solid var(--line)}
.step:before{counter-increment:s;content:counter(s);position:absolute;top:-16px;left:24px;width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700;box-shadow:0 6px 14px -4px rgba(99,102,241,.6)}
.step h3{margin:8px 0 6px;font-size:17px} .step p{margin:0;color:var(--muted);font-size:14.5px}
pre.code{background:#0f172a;color:#e2e8f0;padding:18px 20px;border-radius:12px;overflow:auto;font-size:13px;line-height:1.6;margin:0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
pre.code .t{color:#93c5fd} pre.code .a{color:#fcd34d} pre.code .s{color:#86efac}
.embed-demo{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;margin-top:40px}
.pricing{display:grid;grid-template-columns:repeat(2,minmax(0,380px));gap:24px;justify-content:center}
.plan{background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px;position:relative}
.plan.pop{border:2px solid var(--brand);box-shadow:0 30px 60px -30px rgba(99,102,241,.45)}
.plan .badge{position:absolute;top:-12px;right:24px;background:var(--brand);color:#fff;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px}
.plan h3{margin:0;font-size:18px} .plan .price{font-size:46px;font-weight:800;letter-spacing:-.03em;margin:10px 0 2px} .plan .price small{font-size:16px;color:var(--muted);font-weight:500}
.plan ul{list-style:none;padding:0;margin:20px 0 26px} .plan li{padding:6px 0 6px 26px;position:relative;font-size:14.5px}
.plan li:before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.plan .btn{width:100%;justify-content:center}
.muted{color:var(--muted)}
.cta{background:radial-gradient(800px 300px at 50% 0,rgba(99,102,241,.4),transparent 70%),var(--bg);color:#fff;border-radius:24px;padding:60px;text-align:center}
.cta h2{font-size:36px;margin:0 0 10px;letter-spacing:-.03em} .cta p{color:#cbd5e1;margin:0 0 26px;font-size:17px}
footer{padding:40px 0;color:var(--muted);font-size:14px;border-top:1px solid var(--line);margin-top:80px}
footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
/* auth */
.auth-wrap{min-height:100vh;display:grid;place-items:center;background:radial-gradient(900px 500px at 70% -10%,rgba(99,102,241,.35),transparent 60%),var(--bg);padding:24px}
.auth-card{width:100%;max-width:410px;background:#fff;border-radius:18px;padding:34px;box-shadow:0 40px 80px -30px rgba(0,0,0,.6)}
.auth-card .logo{color:var(--ink);margin-bottom:20px}
.auth-card h1{font-size:24px;margin:0 0 4px;letter-spacing:-.02em} .auth-card p.sub{color:var(--muted);margin:0 0 22px;font-size:14.5px}
label.f{display:block;font-size:13px;font-weight:600;margin:0 0 6px;color:#334155}
input.i,select.i,textarea.i{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:9px;font:inherit;font-size:14.5px;background:#fff;color:var(--ink);transition:.15s}
input.i:focus,select.i:focus,textarea.i:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(99,102,241,.18)}
.field{margin-bottom:14px}
.err{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca;padding:10px 12px;border-radius:9px;font-size:14px;margin-bottom:14px;display:none}
.note{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe;padding:10px 12px;border-radius:9px;font-size:13.5px}
.warnbox{background:#fffbeb;color:#92400e;border:1px solid #fde68a;padding:12px 14px;border-radius:10px;font-size:14px}
@media (max-width:900px){.hero-copy{position:static;padding-top:0}.hero-grid,.embed-demo{grid-template-columns:1fr}.features,.steps{grid-template-columns:1fr}.pricing{grid-template-columns:1fr}.hero h1{font-size:40px}.nav-links{display:none}.cta{padding:36px 20px}}
.faq{max-width:780px;margin:0 auto;display:grid;gap:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 20px}
.faq summary{cursor:pointer;font-weight:700;font-size:16.5px;padding:18px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--brand);font-size:22px;line-height:1}
.faq details[open] summary:after{content:"–"}
.faq details p{margin:0 0 18px;color:#475569;font-size:15px}
.hero-stats{flex-wrap:wrap}