body {
  max-width: 640px;
  margin: 40px auto;
  padding: 0 16px;
  background: #fff;
  color: #222;
  font: 16px/1.5 Georgia, "Times New Roman", serif;
}

a { color: inherit; }

h1 { font-size: 1.6em; margin: 0 0 8px; }
h2 { font-size: 1.15em; margin: 32px 0 8px; }

.site-header { margin-bottom: 24px; }