:root {
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #ffffff;
  color: #374151; /* gray-700 */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

a { color: #2563eb; text-decoration: none; }
a:hover { color: #1d4ed8; text-decoration: underline; }

.topnav {
  background: #ffffff;
  border-bottom: 1px solid #f3f4f6; /* gray-100 */
}
.topnav-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: #111827; /* gray-900 */
}
.brand:hover { text-decoration: none; }
.navlinks { display: flex; gap: 2rem; }
.navlinks a {
  color: #4b5563; /* gray-600 */
  font-size: 0.875rem;
}
.navlinks a:hover { color: #111827; }

.content {
  max-width: 56rem;
  margin: 0 auto;
  padding: 5rem 1.5rem;
}

h1 {
  font-size: 2.25rem;
  font-weight: 700;
  color: #111827;
  margin: 0 0 2rem;
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #111827;
  margin: 2rem 0 1rem;
}

p, ul { margin: 0 0 1.5rem; }

ul { padding-left: 1.25rem; }
li { margin-bottom: 0.25rem; }

.updated {
  font-size: 0.875rem;
  color: #6b7280; /* gray-500 */
  margin-bottom: 2rem;
}