:root{
  --bg:#ffffff; --fg:#0b0b0b; --muted:#667085; --line:#e6e6e6; --card:#fafafa;
  --radius:16px; --shadow:0 8px 24px rgba(16,24,40,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--fg);
  font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}
a{color:inherit;text-decoration:none}
a:hover{opacity:.86}

.container{max-width:1040px;margin:0 auto;padding:0 22px}

header{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
nav{display:flex;gap:12px;align-items:center;min-height:58px;flex-wrap:wrap}
nav a{padding:8px 10px;border-radius:12px}
nav a.primary{font-weight:700}
nav a:hover{background:rgba(11,11,11,.04)}

main{padding:22px 0}

h1{font-size:36px;letter-spacing:-.02em;line-height:1.05;margin:0 0 12px}
h2{font-size:22px;letter-spacing:-.01em;line-height:1.25;margin:22px 0 10px}
h3{font-size:16px;margin:16px 0 8px}
p{margin:10px 0;line-height:1.55}
.muted{color:var(--muted)}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:16px;
  box-shadow:var(--shadow);
}
hr{border:0;border-top:1px solid var(--line);margin:18px 0}

code,pre{
  font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
  font-size:12.5px;
}
pre{background:#f6f6f6;border:1px solid var(--line);border-radius:14px;padding:14px;overflow:auto}

.btn{
  display:inline-block;
  border:1px solid var(--fg);
  padding:10px 12px;
  border-radius:14px;
}
.btn.primary{background:var(--fg);color:#fff}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}

footer{border-top:1px solid var(--line);margin-top:22px}
footer .container{padding:18px 22px;color:var(--muted);font-size:13px}

@media (max-width:640px){
  h1{font-size:30px}
  .container{padding:0 16px}
}