:root{
  --bg:#0b1220;
  --card:#121b2f;
  --txt:#eaf0ff;
  --muted:#b7c2e1;
  --accent:#66e3ff;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--txt);
}
.wrap{
  max-width:900px;
  margin:auto;
  padding:40px 20px 60px;
}
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:24px;
  gap:16px;
  flex-wrap:wrap;
}
.brand{
  font-weight:700;
}
.lang-switch{
  display:flex;
  gap:10px;
}
.lang-btn,.back-link{
  display:inline-flex;
  padding:8px 14px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.15);
  background:rgba(255,255,255,.04);
  color:var(--txt);
  text-decoration:none;
  font-size:14px;
  font-weight:700;
}
.lang-btn.active{
  background:var(--accent);
  color:#04121e;
  border-color:transparent;
}
.lang-btn:hover,.back-link:hover{
  background:rgba(255,255,255,.08);
}
.card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  border-radius:18px;
  padding:26px;
}
h1{
  margin:0 0 8px;
  font-size:40px;
}
h2{
  margin:24px 0 10px;
  font-size:22px;
}
p,li{
  color:var(--muted);
  line-height:1.7;
}
a{
  color:var(--accent);
}
.footer{
  margin-top:28px;
  font-size:14px;
  color:var(--muted);
}