* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: #222;
  background: #f5f5f7;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  background: #111827;
  color: #f9fafb;
  padding: 2.5rem 0 1.5rem;
}

.nav { display: flex; gap: 1rem; flex-wrap: wrap; }

.nav a {
  color: #e5e7eb;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.nav a:hover { border-bottom-color: #facc15; }

.section { padding: 3rem 0; background: #f5f5f7; }
.section-alt { background: #ffffff; }

.site-footer {
  text-align: center;
  padding: 1.5rem 0 2rem;
  font-size: .9rem;
  color: #6b7280;
}