:root {
  --bg: #f6f8f1;
  --surface: #ffffff;
  --text: #1f2a1c;
  --muted: #5d6b58;
  --accent: #2f7d32;
  --accent-text: #ffffff;
  --hero-a: #8fcdf2;
  --hero-b: #8cc266;
  --border: #dfe6d6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121811;
    --surface: #1b2419;
    --text: #e6eee1;
    --muted: #a3b29c;
    --accent: #6cc070;
    --accent-text: #0f1a0e;
    --hero-a: #1d4a63;
    --hero-b: #2c5426;
    --border: #2c3a29;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 ui-rounded, -apple-system, BlinkMacSystemFont, "SF Pro Rounded", "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
.hero {
  background: linear-gradient(180deg, var(--hero-a), var(--hero-b));
  padding: 56px 0 40px;
  margin-bottom: 32px;
}
.eyebrow { margin: 0; font-weight: 700; opacity: 0.8; }
h1 { font-size: 2.6rem; line-height: 1.1; margin: 8px 0 12px; }
h2 { font-size: 1.35rem; margin: 36px 0 8px; }
h3 { font-size: 1.05rem; margin: 20px 0 4px; }
.lead { font-size: 1.15rem; margin: 0 0 20px; }
.small { font-size: 0.9rem; color: inherit; opacity: 0.8; margin: 10px 0 0; }
a { color: var(--accent); }
.button {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-text);
  text-decoration: none;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 14px;
}
ul { padding-left: 1.2em; }
details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 16px;
  margin: 10px 0;
}
summary { font-weight: 700; cursor: pointer; }
details p { color: var(--muted); margin: 8px 0 0; }
footer { margin: 48px auto 32px; color: var(--muted); font-size: 0.9rem; }