:root{--navy:#070e18;--navy2:#0d1a2b;--cyan:#2cc7dc;--ice:#e2f1f8;--mute:#9fb4c4;--line:#1c3047}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--navy);color:var(--ice);line-height:1.6;font-size:17px}
a{color:var(--cyan)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;background:rgba(7,14,24,.96);border-bottom:1px solid var(--line);z-index:5}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;flex-wrap:wrap}
.logo{font-weight:700;letter-spacing:.18em;color:var(--ice);text-decoration:none;font-size:15px}
.logo span{color:var(--cyan)}
nav a{color:var(--ice);text-decoration:none;margin-left:20px;font-size:15px}
nav a:hover,nav a.on{color:var(--cyan)}
.hero{padding:84px 0 70px;background:radial-gradient(ellipse at 80% 20%,rgba(44,199,220,.18),transparent 55%)}
.eyebrow{color:var(--cyan);letter-spacing:.2em;font-size:13px;font-weight:600;text-transform:uppercase}
h1{font-size:clamp(34px,6vw,58px);line-height:1.1;margin:10px 0 18px}
h1 em{font-style:normal;color:var(--cyan)}
h2{font-size:clamp(26px,4vw,36px);margin:0 0 14px}
h3{font-size:20px;margin:0 0 8px}
.lead{font-size:20px;color:var(--mute);max-width:720px}
.btn{display:inline-block;background:var(--cyan);color:var(--navy);padding:13px 26px;border-radius:6px;font-weight:700;text-decoration:none;margin-top:22px}
.btn.alt{background:transparent;border:1px solid var(--cyan);color:var(--cyan);margin-left:12px}
section{padding:64px 0;border-top:1px solid var(--line)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:28px}
.card{background:var(--navy2);border:1px solid var(--line);border-radius:10px;padding:22px}
.card .n{color:var(--cyan);font-size:30px;font-weight:700}
.card p{margin:0;color:var(--mute);font-size:16px}
ul.chk{list-style:none;padding:0}ul.chk li{padding:6px 0 6px 28px;position:relative}
ul.chk li:before{content:"";position:absolute;left:0;top:14px;width:12px;height:12px;border-radius:50%;background:var(--cyan)}
details{background:var(--navy2);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin:12px 0}
summary{cursor:pointer;font-weight:600}details p{color:var(--mute);margin:10px 0 0}
footer{border-top:1px solid var(--line);padding:30px 0;color:var(--mute);font-size:14px}
footer a{color:var(--mute);margin-right:18px}
.todo{background:#3a2d00;border:1px dashed #ffcc33;color:#ffe08a;padding:2px 6px;border-radius:4px}
@media(max-width:640px){nav a{margin:0 14px 0 0}.btn.alt{margin:12px 0 0}}