:root {
  --primary: #1A2E25;
  --accent: #4CAF85;
  --light-bg: #EEF8F3;
  --muted: #5A7A70;
  --border: #E2F0EB;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--light-bg);
  color: var(--primary);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
header {
  background: var(--primary);
  color: #fff;
  padding: 20px 16px;
}
header a { color: #fff; text-decoration: none; font-weight: 800; font-size: 20px; letter-spacing: 0.3px; }
header nav { margin-top: 8px; display: flex; gap: 16px; flex-wrap: wrap; }
header nav a { font-size: 14px; font-weight: 600; opacity: 0.85; }
header nav a:hover { opacity: 1; }
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}
article {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
}
h1 { font-size: 28px; margin: 0 0 4px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
h2 { font-size: 17px; margin: 24px 0 6px; }
p, li { color: var(--muted); margin: 0 0 12px; }
ul { padding-left: 20px; }
a { color: var(--accent); font-weight: 700; }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 0 16px 32px; }