:root{
  --bg:#060a1c; --bg2:#0a1230; --card:rgba(255,255,255,.05); --line:rgba(255,255,255,.10);
  --text:#eef2ff; --muted:#a7b0cc; --accent:#4f7dff; --accent2:#9b7bff; --gold:#ffb347;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#f6f8ff; --bg2:#eaf0ff; --card:#ffffff; --line:rgba(10,20,60,.10);
    --text:#0b1330; --muted:#4a5578; --accent:#2f5bff; --accent2:#6b4ef0; --gold:#d98400;
  }
}
*{box-sizing:border-box}
html,body{margin:0}
html{background-color:var(--bg)}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);background:radial-gradient(1200px 700px at 70% -10%,rgba(79,125,255,.25),transparent 60%),linear-gradient(180deg,var(--bg2),var(--bg) 420px);
  background-color:var(--bg);background-repeat:no-repeat;min-height:100vh;line-height:1.6;overflow-wrap:anywhere;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:20px 0}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;font-weight:700}
.brand img{width:40px;height:40px;border-radius:10px}
nav.links{display:flex;gap:18px;flex-wrap:wrap}
nav.links a{color:var(--muted);text-decoration:none;font-size:15px}
nav.links a:hover,nav.links a[aria-current="page"]{color:var(--text)}
.hero{padding:56px 0 32px;display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:center}
.hero img{width:120px;height:120px;border-radius:28px;box-shadow:0 20px 40px rgba(0,0,0,.35)}
h1{font-size:clamp(32px,5vw,52px);line-height:1.08;margin:0 0 12px;letter-spacing:-.02em}
h1 .grad{background:linear-gradient(90deg,#7fb2ff,var(--accent) 55%,var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);font-size:18px;margin:0 0 22px;max-width:620px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:12px 20px;border-radius:12px;background:var(--text);color:var(--bg);text-decoration:none;font-weight:600}
.btn.secondary{background:transparent;color:var(--text);border:1px solid var(--line);margin-left:8px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:28px 0 48px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:15px}
section.doc{padding:24px 0 48px}
section.doc h1{font-size:clamp(28px,4vw,40px)}
section.doc h2{font-size:21px;margin:32px 0 8px}
section.doc p,section.doc li{color:var(--muted)}
section.doc strong{color:var(--text)}
.meta{color:var(--muted);font-size:14px}
.lang{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:8px 0 20px}
.lang button{background:transparent;border:0;color:var(--muted);padding:8px 14px;font:inherit;cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--card);color:var(--text)}
[data-lang-block]{display:none}
[data-lang-block].on{display:block}
footer{border-top:1px solid var(--line);padding:24px 0 40px;color:var(--muted);font-size:14px}
footer a{color:var(--muted)}
@media (max-width:720px){
  .hero{grid-template-columns:1fr;text-align:left;padding-top:32px}
  .hero img{width:88px;height:88px;border-radius:20px}
  .grid{grid-template-columns:1fr}
  .btn.secondary{margin:10px 0 0}
  nav.links{gap:12px}
}