:root {
  --bg: #ffffff;
  --ink: #1c2733;
  --muted: #5b6875;
  --line: #e2e7ec;
  --accent: #1f7a57;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c2733;
    --ink: #f1f5f8;
    --muted: #a8b5c1;
    --line: #33414f;
    --accent: #a5e3c8;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

h1 { font-size: 26px; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p, li { margin: 8px 0; }
ul { padding-left: 22px; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 14px; }
nav { border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-bottom: 24px; font-size: 14px; }
nav a { margin-right: 16px; }