:root {
  color-scheme: light;
  --bg: #f7f8f4;
  --card: #ffffff;
  --text: #23302a;
  --muted: #66736d;
  --green: #47745f;
  --border: #dde4df;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
main { max-width: 820px; margin: 0 auto; padding: 48px 20px 72px; }
header { margin-bottom: 28px; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; margin: 0 0 10px; }
h2 { font-size: 1.15rem; margin-top: 0; }
a { color: var(--green); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
  margin: 14px 0;
}
.muted { color: var(--muted); }
nav { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 22px; }
nav a { font-weight: 600; text-decoration: none; }
footer { color: var(--muted); font-size: .9rem; margin-top: 36px; }