:root{
  --bg:#0b1220;
  --card:#0f1a2e;
  --muted:#97a3b6;
  --text:#e8eefc;
  --border:rgba(255,255,255,.10);
  --chip:rgba(255,255,255,.08);
  --link:#9bbcff;
  --shadow:0 20px 70px rgba(0,0,0,.45);
  --radius:18px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(155,188,255,.22), transparent 60%),
    radial-gradient(900px 600px at 90% 0%, rgba(196,120,255,.16), transparent 55%),
    var(--bg);
  line-height:1.6;
}

a{color:var(--link); text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1100px; margin:0 auto; padding:22px 16px 56px}

.topbar{
  display:flex;
  gap:16px;
  align-items:center;
  justify-content:space-between;
  padding:14px 16px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:var(--radius);
  backdrop-filter: blur(10px);
}

.brand{display:flex; align-items:center; gap:12px; min-width:240px}
.logo{
  width:34px; height:34px; border-radius:12px;
  background:linear-gradient(135deg, rgba(155,188,255,.9), rgba(196,120,255,.8));
  box-shadow:0 10px 30px rgba(155,188,255,.18);
}
.brand h1{
  margin:0;
  font-size:15px;
  letter-spacing:.2px;
}
.brand .sub{display:inline-block; margin-left:6px; color:var(--muted); font-weight:600; font-size:12px}

.nav{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:center;
}
.nav a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  color:var(--text);
  font-weight:650;
  font-size:13px;
}
.nav a.active{
  background:rgba(155,188,255,.14);
  border-color:rgba(155,188,255,.35);
}

.lang{display:flex; align-items:center; gap:10px}
.lang .hint{color:var(--muted); font-size:12px; font-weight:650}
.lang button{
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  color:var(--text);
  border-radius:999px;
  padding:8px 10px;
  font-weight:750;
  font-size:12px;
  cursor:pointer;
}
.lang button.active{
  background:rgba(196,120,255,.16);
  border-color:rgba(196,120,255,.35);
}

.hero{
  margin-top:14px;
  padding:18px 18px 16px;
  border-radius:var(--radius);
  border:1px solid var(--border);
  background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  box-shadow:var(--shadow);
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:7px 10px;
  border:1px solid var(--border);
  border-radius:999px;
  background:rgba(255,255,255,.03);
  color:var(--muted);
  font-weight:700;
  font-size:12px;
}
.badge i{
  width:10px; height:10px; border-radius:999px;
  background:rgba(155,188,255,.9);
  box-shadow:0 0 0 6px rgba(155,188,255,.10);
}
.hero h2{margin:12px 0 6px; font-size:28px; letter-spacing:.2px}
.hero p{margin:0; color:var(--muted); max-width:850px}

.grid{
  display:grid;
  grid-template-columns: 1.6fr .9fr;
  gap:14px;
  margin-top:14px;
}
@media (max-width: 900px){
  .grid{grid-template-columns:1fr}
  .brand{min-width:auto}
}

.card{
  border-radius:var(--radius);
  border:1px solid var(--border);
  background:rgba(15,26,46,.75);
  box-shadow:var(--shadow);
  padding:18px;
}
.card h3{margin:0 0 10px; font-size:16px}
.card p{margin:10px 0}
.card ul, .card ol{margin:10px 0 12px 18px}
.card li{margin:6px 0; color:rgba(232,238,252,.92)}
.small{color:var(--muted); font-size:13px}

.sep{
  border:0;
  height:1px;
  background:var(--border);
  margin:16px 0;
}

.kv{
  display:grid;
  grid-template-columns: 140px 1fr;
  gap:10px 14px;
  padding:12px;
  border-radius:14px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
}
@media (max-width: 520px){
  .kv{grid-template-columns:1fr}
}

.inline.code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  padding:2px 8px;
  border-radius:999px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  font-size:12px;
}

.footer{
  margin-top:12px;
  color:var(--muted);
  font-size:12.5px;
}