:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6368;
  --line: #e3e3e6;
  --card: #f5f5f7;
  --green: #1b8a45;
  --link: #0a66c2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --text: #f2f2f4;
    --muted: #a2a6ad;
    --line: #2c2e33;
    --card: #1b1d21;
    --green: #34c26b;
    --link: #6ab0ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 40px 16px 64px; }
header.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.mark { width: 44px; height: 44px; border-radius: 10px; box-shadow: 0 0 0 1px var(--line); }
.brand a { color: inherit; text-decoration: none; font-weight: 650; font-size: 19px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 21px; margin: 36px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 4px; }
p, li { color: var(--text); }
.lede { font-size: 19px; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
a { color: var(--link); }
.card { background: var(--card); border-radius: 14px; padding: 16px 18px; margin: 16px 0; }
.badges { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0; }
.badge {
  display: inline-block; padding: 12px 18px; border-radius: 12px;
  background: var(--text); color: var(--bg); text-decoration: none; font-weight: 600;
}
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); }