body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #222;
  line-height: 1.6;
}

header {
  background: #111;
  color: white;
  padding: 2rem;
  text-align: center;
}

.tagline {
  font-size: 1.2rem;
  opacity: 0.75;
}

nav {
  background: #eee;
  padding: 0.5rem;
  text-align: center;
}

nav a {
  margin: 0 1rem;
  color: #222;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 2rem;
  max-width: 800px;
  margin: auto;
}

section {
  margin-bottom: 3rem;
}

footer {
  text-align: center;
  font-size: 0.9rem;
  padding: 2rem;
  background: #fafafa;
  border-top: 1px solid #ccc;
  color: #777;
}