:root {
  --bg: #ffffff;
  --bg-soft: #f4f7f5;
  --text: #0e1b16;
  --muted: #56665f;
  --border: #e3e9e6;
  --primary: #0b7a55;
  --primary-soft: #e4f3eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1613;
    --bg-soft: #16201c;
    --text: #e8efeb;
    --muted: #a3b3ab;
    --border: #26332d;
    --primary: #3fbf8c;
    --primary-soft: #173326;
  }
}
* { 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;
}
main, header, footer { max-width: 720px; margin: 0 auto; padding: 0 16px; }
header { display: flex; align-items: center; gap: 12px; padding-top: 28px; }
header img { width: 44px; height: 44px; border-radius: 10px; }
header a { color: var(--text); text-decoration: none; font-weight: 700; font-size: 20px; }
nav { margin-left: auto; display: flex; gap: 16px; font-size: 15px; }
nav a { color: var(--muted); font-weight: 500; }
h1 { font-size: 34px; line-height: 1.2; margin: 36px 0 8px; }
h2 { font-size: 21px; margin: 32px 0 6px; }
p, li { color: var(--text); }
.lede { font-size: 19px; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
a { color: var(--primary); }
.card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 14px; padding: 18px 20px; margin: 20px 0; }
.pill { display: inline-block; background: var(--primary-soft); color: var(--primary); border-radius: 999px; padding: 2px 12px; font-size: 14px; font-weight: 600; }
ul { padding-left: 22px; }
footer { border-top: 1px solid var(--border); margin-top: 48px; padding-top: 16px; padding-bottom: 40px; font-size: 14px; color: var(--muted); }
footer p { color: var(--muted); }