*{box-sizing:border-box}
:root{
  --bg:#0d1824;
  --card:#182838;
  --text:#f6f8fb;
  --muted:#9ba8b6;
  --accent:#8fc1f8;
  --line:#2b4054;
}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:linear-gradient(180deg,#0b1621 0%,#101d2a 100%);
  color:var(--text);
}
.wrap{
  width:min(860px,92%);
  margin:0 auto;
  padding:48px 0 64px;
}
.card{
  background:rgba(24,40,56,.96);
  border:1px solid var(--line);
  border-radius:24px;
  padding:28px;
  margin:0 0 18px;
  box-shadow:0 16px 40px rgba(0,0,0,.18);
}
.hero{padding:38px 30px}
.badge{
  display:inline-block;
  font-size:12px;
  letter-spacing:.18em;
  font-weight:700;
  color:#b9d9ff;
  margin-bottom:10px;
}
h1{font-size:40px;line-height:1.08;margin:8px 0 14px}
h2{font-size:22px;margin:10px 0 10px}
p{line-height:1.65;color:#e5ebf2}
.lead{font-size:18px;color:#c9d4df}
.muted{color:var(--muted)}
a{color:#9dcbff;text-decoration:none}
a:hover{text-decoration:underline}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.button{
  display:inline-block;
  padding:12px 18px;
  border-radius:14px;
  background:var(--accent);
  color:#0c1620;
  font-weight:700;
}
.button.secondary{
  background:#22384c;
  color:#dfeeff;
  border:1px solid #35536d;
}
details{
  border-top:1px solid var(--line);
  padding:14px 0;
}
details:first-of-type{border-top:0}
summary{cursor:pointer;font-weight:650}
footer{text-align:center;color:var(--muted);padding-top:10px}
@media (max-width:600px){
  .wrap{padding-top:24px}
  .card{padding:22px}
  .hero{padding:28px 22px}
  h1{font-size:34px}
}