:root {
  --text: #1c1c1e;
  --muted: #6b6b70;
  --line: #e5e5ea;
  --accent: #3a5bd9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: #fff;
}

header, main, footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  padding-bottom: 24px;
}

header .brand {
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
}

nav a {
  margin-left: 18px;
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

nav a:hover { color: var(--accent); }

h1 { font-size: 32px; line-height: 1.25; margin: 32px 0 12px; }
h2 { font-size: 20px; margin: 36px 0 8px; }

.lead { font-size: 19px; color: var(--muted); }
.updated { color: var(--muted); font-size: 14px; }

a { color: var(--accent); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 12px 0;
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}

th { font-weight: 600; }

footer {
  margin-top: 64px;
  padding-top: 20px;
  padding-bottom: 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer a { color: var(--muted); margin-right: 16px; }