:root {
  --fg: #1a1a1a;
  --muted: #555;
  --accent: #0a5;
  --bg: #fff;
  --border: #e5e5e5;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 1rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.6rem; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 0.4rem; }

p, ul, ol, table { margin: 0 0 1rem; }

a { color: var(--accent); }
a:hover { text-decoration: underline; }

ul, ol { padding-left: 1.4rem; }
li { margin-bottom: 0.25rem; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th { background: #fafafa; font-weight: 600; }

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}