:root{--bg:#0b1020;--fg:#eef1f8;--mut:#9aa3b8;--acc:#3b82f6;--card:#141b30}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,Segoe UI,Inter,sans-serif}
.w{max-width:960px;margin:0 auto;padding:0 20px}nav{display:flex;justify-content:space-between;align-items:center;padding:20px 0}
nav a{color:var(--fg);text-decoration:none;margin-left:18px;font-size:14px}.logo{font-weight:800;font-size:20px}
.hero{padding:70px 0 50px}h1{font-size:44px;line-height:1.1;margin:0 0 16px}.hero p{color:var(--mut);font-size:19px;max-width:620px}
.btn{display:inline-block;background:var(--acc);color:#fff;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600;margin-top:16px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;padding:30px 0}
.card{background:var(--card);border-radius:14px;padding:22px}.card h3{margin:0 0 8px}.card p{color:var(--mut);margin:0}
footer{border-top:1px solid #222a44;margin-top:50px;padding:24px 0;color:var(--mut);font-size:14px}footer a{color:var(--mut)}
.doc h2{margin-top:30px}.doc p,.doc li{color:#cfd5e4}
@media(max-width:600px){h1{font-size:32px}}