:root {
  --primary: #0E7C66;
  --text: #1A1A1A;
  --muted: #5B6770;
  --bg: #FFFFFF;
  --border: #E5E9EC;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
header {
  background: var(--primary);
  color: #fff;
  padding: 28px 20px;
}
header .wrap { max-width: 760px; margin: 0 auto; }
header h1 { margin: 0; font-size: 22px; }
header p { margin: 6px 0 0; opacity: .85; font-size: 14px; }
main { max-width: 760px; margin: 0 auto; padding: 24px 20px 64px; }
h2 { font-size: 19px; margin-top: 32px; color: var(--primary); }
h3 { font-size: 16px; margin-top: 22px; }
p, li { font-size: 15px; color: var(--text); }
ul { padding-left: 20px; }
a { color: var(--primary); }
.updated { color: var(--muted); font-size: 13px; margin-top: 4px; }
.nav { margin: 18px 0 0; font-size: 14px; }
.nav a { margin-right: 16px; text-decoration: none; font-weight: 600; }
footer { border-top: 1px solid var(--border); padding: 20px; text-align: center; color: var(--muted); font-size: 13px; }
.card { border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; margin-top: 16px; }
.card a { font-weight: 700; text-decoration: none; }