:root{
  --ink:#0f172a; --ink-2:#334155; --muted:#64748b; --line:#e2e8f0;
  --bg:#ffffff; --bg-alt:#f8fafc; --accent:#1e3a8a; --accent-2:#2563eb; --ok:#166534; --err:#991b1b;
  --max:1080px; --radius:12px;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
a{color:var(--accent-2);text-decoration:none}
h1,h2,h3{line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:800}
h2{font-size:clamp(1.7rem,3vw,2.3rem);font-weight:800}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 1em}

.nav{display:flex;justify-content:space-between;align-items:center;max-width:var(--max);margin:0 auto;padding:22px 24px}
.nav nav{display:flex;gap:26px;align-items:center}
.nav nav a{color:var(--ink-2);font-weight:500}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:var(--ink)}
.mark{width:22px;height:22px;border-radius:6px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:inline-block}

.btn{display:inline-block;background:var(--accent);color:#fff;font-weight:600;padding:14px 24px;border-radius:10px;border:0;cursor:pointer;font-size:1rem}
.btn:hover{background:var(--accent-2)}
.btn.small{padding:10px 18px;font-size:.95rem;color:#fff}
.link{font-weight:600;margin-left:18px}

.hero{max-width:var(--max);margin:0 auto;padding:72px 24px 48px}
.eyebrow{color:var(--accent-2);font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.8rem}
.lead{font-size:1.25rem;color:var(--ink-2);max-width:760px}
.cta{margin:26px 0 14px;display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.note{color:var(--muted);font-size:.95rem}

.strip{max-width:var(--max);margin:0 auto 24px;padding:0 24px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.strip div{background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.strip strong{display:block;margin-bottom:4px}
.strip span{color:var(--ink-2);font-size:.98rem}

.section{max-width:var(--max);margin:0 auto;padding:72px 24px}
.section.alt{max-width:none;background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.alt>*{max-width:var(--max);margin-left:auto;margin-right:auto}

.steps{list-style:none;padding:0;margin:28px 0 0;display:grid;grid-template-columns:repeat(2,1fr);gap:28px 40px}
.steps li{position:relative;padding-left:56px}
.steps li span{position:absolute;left:0;top:2px;font-weight:800;color:var(--accent-2);font-size:1.1rem}
.steps p{color:var(--ink-2);margin:0}

.cols{display:grid;grid-template-columns:repeat(2,1fr);gap:40px;margin-top:20px}
.cols p{color:var(--ink-2)}
.fit{margin-top:28px;padding:16px 20px;border-left:3px solid var(--accent);background:#fff;color:var(--ink-2);border-radius:0 8px 8px 0}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:20px}
.grid div{border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.grid p{color:var(--ink-2);margin:0;font-size:.98rem}

.demo{background:var(--ink);color:#fff;max-width:none;border-radius:0}
.demo>*{max-width:720px;margin-left:auto;margin-right:auto}
.demo h2{color:#fff}
.demo>p{color:#cbd5e1}
form{margin-top:28px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{display:block;margin-bottom:14px;font-size:.92rem;color:#cbd5e1;font-weight:500}
input,textarea{display:block;width:100%;margin-top:6px;padding:12px 14px;border-radius:8px;border:1px solid #334155;background:#1e293b;color:#fff;font:inherit;font-size:1rem}
input:focus,textarea:focus{outline:2px solid var(--accent-2);border-color:transparent}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.fine{color:#94a3b8;font-size:.9rem;margin-top:12px}
.status{font-weight:600;min-height:1.4em}
.status.ok{color:#86efac}
.status.err{color:#fca5a5}

footer{max-width:var(--max);margin:0 auto;padding:48px 24px;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:start;color:var(--ink-2)}
footer p{margin:6px 0 0;font-size:.95rem}
.foot-links{display:flex;gap:22px}
.copy{grid-column:1/-1;color:var(--muted);font-size:.88rem;border-top:1px solid var(--line);padding-top:18px}

@media (max-width:820px){
  .nav nav a:not(.btn){display:none}
  .strip,.steps,.cols,.grid,.row{grid-template-columns:1fr}
  .hero{padding-top:44px}
  .section{padding:52px 24px}
  footer{grid-template-columns:1fr}
}