:root{
  color-scheme: light dark;
  --bg:#eceff4; --card:#ffffff; --fg:#0e1620; --mut:#59647a; --line:#dbe1ea;
  --accent:#1f6feb; --soft:#e9eff9;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0b0f16; --card:#111825; --fg:#dfe6f0; --mut:#8b97a8; --line:#1e2734;
         --accent:#4d8bff; --soft:#152033; }
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);line-height:1.65;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,sans-serif}
.wrap{max-width:760px;margin:0 auto;padding:26px 20px 70px}
header{display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:30px}
.brand{display:flex;align-items:center;gap:9px;font-family:var(--mono);font-weight:700;
  letter-spacing:.08em;text-transform:uppercase;font-size:.82rem;color:inherit;text-decoration:none}
.brand img{width:26px;height:26px;object-fit:contain;display:block}
.langsw{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.langsw button{background:none;border:0;color:var(--mut);cursor:pointer;padding:5px 11px;
  font-family:var(--mono);font-size:.7rem;font-weight:700;letter-spacing:.06em}
.langsw button.active{background:var(--accent);color:#fff}
h1{font-size:1.9rem;letter-spacing:-.02em;margin:0 0 6px}
.updated{color:var(--mut);font-family:var(--mono);font-size:.72rem;text-transform:uppercase;
  letter-spacing:.08em;margin-bottom:26px}
h2{font-size:1.06rem;margin:30px 0 8px}
p,li{color:var(--fg);margin:9px 0}
ul{padding-left:20px}
.box{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:18px 0}
.box p:first-child{margin-top:0} .box p:last-child{margin-bottom:0}
a{color:var(--accent)}
footer{margin-top:44px;padding-top:18px;border-top:1px solid var(--line);
  color:var(--mut);font-size:.82rem;display:flex;gap:16px;flex-wrap:wrap}