:root {
  color-scheme: light dark;
  --bg: #f2f2f7;
  --card: #ffffff;
  --text: #000000;
  --muted: #6e6e73;
  --accent: #2f5320;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --text: #ffffff;
    --muted: #98989d;
    --accent: #9fd27d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  -webkit-text-size-adjust: 100%;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 4px; letter-spacing: -0.02em; }
.sub { color: var(--muted); margin: 0 0 28px; }
section { background: var(--card); border-radius: 12px; padding: 18px 20px; margin: 0 0 16px; }
h2 { font-size: 20px; margin: 0 0 6px; }
p, ul { margin: 0 0 10px; }
p:last-child, ul:last-child { margin-bottom: 0; }
ul { padding-left: 22px; }
a { color: var(--accent); }
footer { color: var(--muted); font-size: 15px; margin-top: 28px; }