:root{
  --bg:#0c0c0c; --ink:#ffffff; --muted:#a8a8a8; --accent:#36d7b7; --line:#1a1a1a;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif}
.container{max-width:900px;margin:0 auto;padding:0 20px}
.nav{position:sticky;top:0;background:rgba(12,12,12,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:10}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0}
.brand{color:var(--accent);font-weight:900;letter-spacing:.14em}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:12px;border:1px solid var(--line);color:var(--ink);text-decoration:none;transition:transform .08s ease, box-shadow .2s ease}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(54,215,183,.12)}
.btn.primary{border-color:rgba(54,215,183,.6);box-shadow:0 0 16px rgba(54,215,183,.12)}
.hero{padding:80px 0 32px}
.section{padding:72px 0;border-top:1px solid var(--line)}
h1,h2{color:var(--accent);text-transform:uppercase;letter-spacing:.02em}
h1{font-size:34px;margin:0 0 8px 0}
h2{font-size:20px;margin:0 0 12px 0}
p{line-height:1.75;color:var(--ink);margin:0 0 12px}
.sub{color:var(--muted)}
.hr{width:140px;height:2px;background:var(--accent);margin:12px 0 0 0}
.footer{padding:40px 0;border-top:1px solid var(--line);color:var(--muted);text-align:center;font-size:13px}
@media (max-width:720px){
  h1{font-size:26px}
  .section{padding:56px 0}
}