* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #faf9fc;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}
h1 { font-size: 1.75rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
.tagline { color: #5c4d7a; margin-top: 0; }
.meta, .updated { color: #666; font-size: 0.9rem; }
nav { display: flex; flex-direction: column; gap: 0.75rem; margin: 2rem 0; }
nav a {
  color: #5c4d7a;
  font-weight: 600;
  text-decoration: none;
}
nav a:hover { text-decoration: underline; }
a { color: #5c4d7a; }
ul { padding-left: 1.25rem; }
.back { display: inline-block; margin-bottom: 1.5rem; font-size: 0.9rem; }