:root { --fg: #1d2433; --bg: #fffdf8; --accent: #2a6f4f; --muted: #5b6475; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}
header, main, footer { max-width: 40rem; margin: 0 auto; padding: 1rem; }
header { padding-top: 2rem; }
h1 { font-size: 1.8rem; line-height: 1.2; margin: 0 0 0.5rem; }
h2 { font-size: 1.25rem; margin-top: 2rem; }
.lead { font-size: 1.1rem; color: var(--muted); }
a { color: var(--accent); }
.button {
  display: inline-block;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: 0.5rem;
  text-decoration: none;
}
footer { color: var(--muted); font-size: 0.9rem; border-top: 1px solid #e3e0d6; margin-top: 2rem; }
@media (min-width: 40rem) {
  h1 { font-size: 2.4rem; }
}