:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --text: #16181d;
  --muted: #5b6270;
  --border: #e3e6ea;
  --accent: #d97706;
  --link: #b45309;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f12;
    --surface: #171a1f;
    --text: #eceef2;
    --muted: #9aa2b1;
    --border: #262a31;
    --accent: #f59e0b;
    --link: #fbbf24;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 2.5rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
main { max-width: 44rem; margin: 0 auto; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .35rem; letter-spacing: -.02em; }
h2 { font-size: 1.15rem; margin: 2.25rem 0 .6rem; letter-spacing: -.01em; }
h3 { font-size: 1rem; margin: 1.5rem 0 .4rem; }
p, li { color: var(--text); }
a { color: var(--link); }
.updated { color: var(--muted); font-size: .9rem; margin: 0 0 2rem; }
.lede { color: var(--muted); font-size: 1.05rem; margin: 0 0 2rem; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}
.nav { margin-bottom: 2.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.nav a { margin-right: 1.25rem; text-decoration: none; font-weight: 500; }
.nav a:hover { text-decoration: underline; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; display: block; overflow-x: auto; }
th, td { text-align: left; padding: .6rem .75rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; }
code { background: var(--surface); border: 1px solid var(--border); border-radius: 4px; padding: .1rem .35rem; font-size: .9em; }
footer { margin-top: 3.5rem; padding-top: 1.25rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; }
ul { padding-left: 1.25rem; }
li { margin: .35rem 0; }