:root {
  --bg: #ffffff;
  --text: #1d2125;
  --muted: #5a636b;
  --accent: #1f6feb;
  --border: #e3e6e9;
  --card: #f6f8fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121417;
    --text: #e6e8ea;
    --muted: #9aa3ab;
    --accent: #6ea8fe;
    --border: #2a2f35;
    --card: #1a1d21;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
header a.brand { font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; }
nav a { margin-left: 16px; color: var(--muted); text-decoration: none; }
nav a:first-child { margin-left: 0; }
nav a:hover { color: var(--accent); }
main { padding-top: 24px; padding-bottom: 48px; }
h1 { font-size: 32px; line-height: 1.2; margin: 24px 0 8px; }
h2 { font-size: 21px; margin: 32px 0 8px; }
p, li { color: var(--text); }
.lede { font-size: 20px; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
a { color: var(--accent); }
.badge { display: inline-block; font-size: 13px; font-weight: 600; padding: 2px 10px; border-radius: 999px; border: 1px solid var(--accent); color: var(--accent); vertical-align: middle; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin-top: 24px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
footer { padding-top: 16px; padding-bottom: 32px; border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); margin-right: 16px; }