:root {
  --bg: #fffdf7;
  --surface: #ffffff;
  --border: #efebdf;
  --text: #263238;
  --secondary: #4f5b62;
  --accent: #2e7d4f;
  --tint: #e3f7e6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d2333;
    --surface: #253047;
    --border: #34405a;
    --text: #f5f2ea;
    --secondary: #c3cad6;
    --accent: #8fdca6;
    --tint: #253047;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
main { max-width: 640px; margin: 0 auto; padding: 40px 20px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
header img { width: 56px; height: 56px; }
header a { color: inherit; text-decoration: none; font-weight: 800; font-size: 22px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 19px; margin: 32px 0 6px; }
p, li { margin: 0 0 12px; }
a { color: var(--accent); font-weight: 700; }
.muted { color: var(--secondary); font-size: 15px; }
.card {
  background: var(--tint);
  border-radius: 20px;
  padding: 20px;
  margin: 24px 0;
}
ul { padding-left: 20px; }
footer { margin-top: 48px; color: var(--secondary); font-size: 15px; }