body {
  font-family: system-ui, -apple-system, Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fff;
  color: #111;
  line-height: 1.6;
}

header {
  text-align: center;
  padding: 2rem 1rem;
  background: #f0f4ff;
  border-bottom: 1px solid #ddd;
}

header img {
  display: block;
  margin: 0 auto 1rem;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

h1, h2 {
  color: #111827;
}

nav {
  margin-top: 2rem;
  text-align: center;
}

nav a {
  color: #111827;
  margin: 0 0.5rem;
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 1rem;
  border-top: 1px solid #ddd;
  font-size: 0.9rem;
  color: #555;
}