:root {
  --brand: #0b5f52;
  --bg: #f6faf9;
  --text: #12201d;
  --muted: #4a5c57;
  --card: #ffffff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}
header, main, footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px;
}
header {
  padding-top: 40px;
}
h1 { color: var(--brand); margin: 0 0 8px; }
.tagline { color: var(--muted); margin: 0; }
section {
  background: var(--card);
  border-radius: 14px;
  padding: 18px 20px;
  margin: 16px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
a { color: var(--brand); }
footer { color: var(--muted); font-size: 0.9rem; }
ul { padding-left: 1.2rem; }